diff --git a/lingo/invoicing/management/commands/generate_invoices.py b/lingo/invoicing/management/commands/generate_invoices.py
index 8d80965..6571f99 100644
--- a/lingo/invoicing/management/commands/generate_invoices.py
+++ b/lingo/invoicing/management/commands/generate_invoices.py
@@ -18,6 +18,7 @@ import datetime
 
 from django.core.management.base import BaseCommand, CommandError
 
+from lingo.invoicing.models import Campaign
 from lingo.invoicing.utils import generate_invoices
 
 
@@ -27,6 +28,8 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('date_start')
         parser.add_argument('date_end')
+        parser.add_argument('--date-issue')
+        parser.add_argument('--draft', action='store_true')
 
     def handle(self, *args, **options):
         try:
@@ -37,8 +40,26 @@ class Command(BaseCommand):
             date_end = datetime.datetime.fromisoformat(options['date_end']).date()
         except ValueError:
             raise CommandError('Bad value "%s" for date_end' % options['date_end'])
+        if options.get('date_issue'):
+            try:
+                date_issue = datetime.datetime.fromisoformat(options['date_issue']).date()
+            except ValueError:
+                raise CommandError('Bad value "%s" for date_issue' % options['date_issue'])
+        else:
+            date_issue = date_end
 
-        generate_invoices(date_start=date_start, date_end=date_end)
+        try:
+            campaign = Campaign.objects.get(date_start=date_start, date_end=date_end)
+        except Campaign.DoesNotExist:
+            campaigns = Campaign.objects.extra(
+                where=["(date_start, date_end) OVERLAPS (%s, %s)"], params=[date_start, date_end]
+            )
+            if campaigns.exists():
+                raise CommandError('Overlapping campaigns already exist')
+            campaign = Campaign.objects.create(
+                date_start=date_start, date_end=date_end, date_issue=date_issue
+            )
+        generate_invoices(campaign=campaign, draft=options['draft'])
 
         self.stdout.write(
             self.style.SUCCESS('Invoicing generation OK (start: %s, end: %s)' % (date_start, date_end))
diff --git a/lingo/invoicing/migrations/0004_campaign.py b/lingo/invoicing/migrations/0004_campaign.py
new file mode 100644
index 0000000..46b2565
--- /dev/null
+++ b/lingo/invoicing/migrations/0004_campaign.py
@@ -0,0 +1,65 @@
+# Generated by Django 2.2.26 on 2022-12-01 10:38
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('invoicing', '0003_invoice'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Campaign',
+            fields=[
+                (
+                    'id',
+                    models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
+                ),
+                ('date_start', models.DateField(verbose_name='Start date')),
+                ('date_end', models.DateField(verbose_name='End date')),
+                ('date_issue', models.DateField(verbose_name='Issue date')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Pool',
+            fields=[
+                (
+                    'id',
+                    models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
+                ),
+                ('draft', models.BooleanField(default=True)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                (
+                    'campaign',
+                    models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='invoicing.Campaign'),
+                ),
+            ],
+        ),
+        migrations.AddField(
+            model_name='draftinvoice',
+            name='pool',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='invoicing.Pool'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='draftinvoiceline',
+            name='pool',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='invoicing.Pool'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='invoice',
+            name='pool',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='invoicing.Pool'),
+            preserve_default=False,
+        ),
+        migrations.AddField(
+            model_name='invoiceline',
+            name='pool',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, to='invoicing.Pool'),
+            preserve_default=False,
+        ),
+    ]
diff --git a/lingo/invoicing/models.py b/lingo/invoicing/models.py
index 4471994..242d6be 100644
--- a/lingo/invoicing/models.py
+++ b/lingo/invoicing/models.py
@@ -87,6 +87,18 @@ class Regie(models.Model):
         return created, regie
 
 
+class Campaign(models.Model):
+    date_start = models.DateField(_('Start date'))
+    date_end = models.DateField(_('End date'))
+    date_issue = models.DateField(_('Issue date'))
+
+
+class Pool(models.Model):
+    campaign = models.ForeignKey(Campaign, on_delete=models.PROTECT)
+    draft = models.BooleanField(default=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+
 class AbstractInvoice(models.Model):
     label = models.CharField(_('Label'), max_length=300)
     total_amount = models.DecimalField(max_digits=9, decimal_places=2, default=0)
@@ -94,6 +106,8 @@ class AbstractInvoice(models.Model):
     regie = models.ForeignKey(Regie, on_delete=models.PROTECT)
     payer = models.CharField(_('Payer'), max_length=300)
 
+    pool = models.ForeignKey(Pool, on_delete=models.PROTECT)
+
     class Meta:
         abstract = True
 
@@ -125,6 +139,8 @@ class AbstractInvoiceLine(models.Model):
         ],
     )
 
+    pool = models.ForeignKey(Pool, on_delete=models.PROTECT)
+
     class Meta:
         abstract = True
 
diff --git a/lingo/invoicing/utils.py b/lingo/invoicing/utils.py
index 7f3899e..34a3e47 100644
--- a/lingo/invoicing/utils.py
+++ b/lingo/invoicing/utils.py
@@ -26,14 +26,15 @@ from lingo.invoicing.models import DraftInvoice, DraftInvoiceLine
 from lingo.pricing.models import AgendaPricing, AgendaPricingNotFound, PricingError
 
 
-def get_agendas(date_start, date_end):
+def get_agendas(pool):
     agendas_pricings = AgendaPricing.objects.filter(flat_fee_schedule=False).extra(
-        where=["(date_start, date_end) OVERLAPS (%s, %s)"], params=[date_start, date_end]
+        where=["(date_start, date_end) OVERLAPS (%s, %s)"],
+        params=[pool.campaign.date_start, pool.campaign.date_end],
     )
     return Agenda.objects.filter(pk__in=agendas_pricings.values('agendas')).order_by('pk')
 
 
-def get_all_subscriptions(agendas, date_start, date_end):
+def get_all_subscriptions(agendas, pool):
     # result:
     # {
     #     'user_id': {
@@ -44,7 +45,11 @@ def get_all_subscriptions(agendas, date_start, date_end):
     # }
     all_subscriptions = {}
     for agenda in agendas:
-        subscriptions = get_subscriptions(agenda_slug=agenda.slug, date_start=date_start, date_end=date_end)
+        subscriptions = get_subscriptions(
+            agenda_slug=agenda.slug,
+            date_start=pool.campaign.date_start,
+            date_end=pool.campaign.date_end,
+        )
         for subscription in subscriptions:
             if subscription['user_external_id'] not in all_subscriptions:
                 all_subscriptions[subscription['user_external_id']] = {}
@@ -55,9 +60,7 @@ def get_all_subscriptions(agendas, date_start, date_end):
     return all_subscriptions
 
 
-def get_invoice_lines_for_user(
-    agendas, agendas_pricings, user_external_id, subscriptions, date_start, date_end
-):
+def get_invoice_lines_for_user(agendas, agendas_pricings, user_external_id, subscriptions, pool):
     def get_agenda_pricing(agendas_pricings_for_agenda, date_event):
         # same logic as AgendaPricing.get_agenda_pricing
         for agenda_pricing in agendas_pricings_for_agenda:
@@ -93,8 +96,8 @@ def get_invoice_lines_for_user(
     check_status_list = get_check_status(
         agenda_slugs=list(subscriptions.keys()),
         user_external_id=user_external_id,
-        date_start=date_start,
-        date_end=date_end,
+        date_start=pool.campaign.date_start,
+        date_end=pool.campaign.date_end,
     )
     request = RequestFactory().get('/')  # XXX
     agendas_by_slug = {a.slug: a for a in agendas}
@@ -150,6 +153,7 @@ def get_invoice_lines_for_user(
                     event=serialized_event,
                     pricing_data=pricing_error,
                     status='error',
+                    pool=pool,
                 )
             )
         else:
@@ -166,16 +170,20 @@ def get_invoice_lines_for_user(
                     event=serialized_event,
                     pricing_data=pricing_data,
                     status='success',
+                    pool=pool,
                 )
             )
     DraftInvoiceLine.objects.bulk_create(lines)
     return lines
 
 
-def get_all_invoice_lines(agendas, subscriptions, date_start, date_end):
+def get_all_invoice_lines(agendas, subscriptions, pool):
     agendas_pricings = (
         AgendaPricing.objects.filter(flat_fee_schedule=False)
-        .extra(where=["(date_start, date_end) OVERLAPS (%s, %s)"], params=[date_start, date_end])
+        .extra(
+            where=["(date_start, date_end) OVERLAPS (%s, %s)"],
+            params=[pool.campaign.date_start, pool.campaign.date_end],
+        )
         .prefetch_related('agendas', 'pricing__criterias', 'pricing__categories')
     )
 
@@ -187,13 +195,12 @@ def get_all_invoice_lines(agendas, subscriptions, date_start, date_end):
             agendas_pricings=agendas_pricings,
             user_external_id=user_external_id,
             subscriptions=user_subs,
-            date_start=date_start,
-            date_end=date_end,
+            pool=pool,
         )
     return lines
 
 
-def generate_invoices_from_lines(agendas, all_lines, date_start, date_end):
+def generate_invoices_from_lines(agendas, all_lines, pool):
     agendas_by_slug = {a.slug: a for a in agendas}
 
     # regroup lines by regie, and by payer_external_id (payer)
@@ -222,10 +229,15 @@ def generate_invoices_from_lines(agendas, all_lines, date_start, date_end):
     for regie_id, regie_subs in lines_by_regie.items():
         for payer_external_id, adult_lines in regie_subs.items():
             invoice = DraftInvoice.objects.create(
-                label=_('Invoice from %s to %s') % (date_start, date_end - datetime.timedelta(days=1)),
-                date_issue=date_end,  # XXX
+                label=_('Invoice from %s to %s')
+                % (
+                    pool.campaign.date_start,
+                    pool.campaign.date_end - datetime.timedelta(days=1),
+                ),
+                date_issue=pool.campaign.date_issue,
                 regie_id=regie_id,
                 payer=payer_external_id,
+                pool=pool,
             )
             DraftInvoiceLine.objects.filter(pk__in=[line.pk for line in adult_lines]).update(invoice=invoice)
             invoices.append(invoice)
@@ -233,14 +245,13 @@ def generate_invoices_from_lines(agendas, all_lines, date_start, date_end):
     return invoices
 
 
-def generate_invoices(date_start, date_end):
+def generate_invoices(campaign, draft=True):
+    pool = campaign.pool_set.create(draft=draft)
     # get agendas with pricing corresponding to the period
-    agendas = get_agendas(date_start=date_start, date_end=date_end)
+    agendas = get_agendas(pool=pool)
     # get subscriptions for each agenda, for the period
-    subscriptions = get_all_subscriptions(agendas=agendas, date_start=date_start, date_end=date_end)
+    subscriptions = get_all_subscriptions(agendas=agendas, pool=pool)
     # get invoice lines for all subscribed users, for each agenda in the corresponding period
-    lines = get_all_invoice_lines(
-        agendas=agendas, subscriptions=subscriptions, date_start=date_start, date_end=date_end
-    )
+    lines = get_all_invoice_lines(agendas=agendas, subscriptions=subscriptions, pool=pool)
     # and generate invoices
-    generate_invoices_from_lines(agendas=agendas, all_lines=lines, date_start=date_start, date_end=date_end)
+    generate_invoices_from_lines(agendas=agendas, all_lines=lines, pool=pool)
diff --git a/tests/invoicing/test_invoice_generation.py b/tests/invoicing/test_invoice_generation.py
index f6077e8..54778c6 100644
--- a/tests/invoicing/test_invoice_generation.py
+++ b/tests/invoicing/test_invoice_generation.py
@@ -9,7 +9,7 @@ from django.test.utils import CaptureQueriesContext
 from lingo.agendas.chrono import ChronoError
 from lingo.agendas.models import Agenda
 from lingo.invoicing import utils
-from lingo.invoicing.models import DraftInvoice, DraftInvoiceLine, Regie
+from lingo.invoicing.models import Campaign, DraftInvoice, DraftInvoiceLine, Pool, Regie
 from lingo.pricing.models import AgendaPricing, Criteria, CriteriaCategory, Pricing, PricingError
 
 pytestmark = pytest.mark.django_db
@@ -21,12 +21,18 @@ def test_get_agendas():
     agenda3 = Agenda.objects.create(label='Agenda 3')
     Agenda.objects.create(label='Agenda 4')
     pricing = Pricing.objects.create(label='Foo bar 1')
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     # no agenda pricing defined
-    assert (
-        list(utils.get_agendas(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)))
-        == []
-    )
+    assert list(utils.get_agendas(pool=pool)) == []
 
     # agenda pricing, but for flat_fee_schedule
     agenda_pricing = AgendaPricing.objects.create(
@@ -36,10 +42,7 @@ def test_get_agendas():
         flat_fee_schedule=True,  # wrong config
     )
     agenda_pricing.agendas.add(agenda1)
-    assert (
-        list(utils.get_agendas(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)))
-        == []
-    )
+    assert list(utils.get_agendas(pool=pool)) == []
 
     # create some agenda pricing
     agenda_pricing1 = AgendaPricing.objects.create(
@@ -52,74 +55,77 @@ def test_get_agendas():
         date_start=datetime.date(year=2022, month=9, day=1),
         date_end=datetime.date(year=2022, month=10, day=1),
     )
-    assert (
-        list(utils.get_agendas(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)))
-        == []
-    )
+    assert list(utils.get_agendas(pool=pool)) == []
 
     # link agendas to agenda pricing
     agenda_pricing1.agendas.add(agenda1, agenda2)
     agenda_pricing2.agendas.add(agenda3)
 
-    assert list(
-        utils.get_agendas(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1))
-    ) == [agenda3]
-    assert list(
-        utils.get_agendas(date_start=datetime.date(2021, 9, 1), date_end=datetime.date(2021, 10, 1))
-    ) == [agenda1, agenda2]
-    assert (
-        list(utils.get_agendas(date_start=datetime.date(2022, 8, 31), date_end=datetime.date(2022, 9, 1)))
-        == []
-    )
-    assert list(
-        utils.get_agendas(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 9, 2))
-    ) == [agenda3]
-    assert list(
-        utils.get_agendas(date_start=datetime.date(2022, 9, 30), date_end=datetime.date(2022, 10, 1))
-    ) == [agenda3]
-    assert (
-        list(utils.get_agendas(date_start=datetime.date(2022, 10, 1), date_end=datetime.date(2022, 10, 2)))
-        == []
-    )
-    assert list(
-        utils.get_agendas(date_start=datetime.date(2021, 9, 15), date_end=datetime.date(2022, 9, 15))
-    ) == [agenda1, agenda2, agenda3]
+    assert list(utils.get_agendas(pool=pool)) == [agenda3]
+    campaign.date_start = datetime.date(2021, 9, 1)
+    campaign.date_end = datetime.date(2021, 10, 1)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == [agenda1, agenda2]
+    campaign.date_start = datetime.date(2022, 8, 31)
+    campaign.date_end = datetime.date(2022, 9, 1)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == []
+    campaign.date_start = datetime.date(2022, 9, 1)
+    campaign.date_end = datetime.date(2022, 9, 2)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == [agenda3]
+    campaign.date_start = datetime.date(2022, 9, 30)
+    campaign.date_end = datetime.date(2022, 10, 1)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == [agenda3]
+    campaign.date_start = datetime.date(2022, 10, 1)
+    campaign.date_end = datetime.date(2022, 10, 2)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == []
+    campaign.date_start = datetime.date(2021, 9, 15)
+    campaign.date_end = datetime.date(2022, 9, 15)
+    campaign.save()
+    assert list(utils.get_agendas(pool=pool)) == [agenda1, agenda2, agenda3]
 
 
 @mock.patch('lingo.invoicing.utils.get_subscriptions')
 def test_get_all_subscriptions_error(mock_subscriptions):
     agenda = Agenda.objects.create(label='Agenda')
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
     mock_subscriptions.side_effect = ChronoError('foo baz')
     with pytest.raises(ChronoError):
-        utils.get_all_subscriptions(
-            agendas=[agenda], date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)
-        )
+        utils.get_all_subscriptions(agendas=[agenda], pool=pool)
 
 
 @mock.patch('lingo.invoicing.utils.get_subscriptions')
 def test_get_all_subscriptions(mock_subscriptions):
     agenda1 = Agenda.objects.create(label='Agenda 1')
     agenda2 = Agenda.objects.create(label='Agenda 2')
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     # no agendas
-    assert (
-        utils.get_all_subscriptions(
-            agendas=[], date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)
-        )
-        == {}
-    )
+    assert utils.get_all_subscriptions(agendas=[], pool=pool) == {}
     assert mock_subscriptions.call_args_list == []
 
     # no subscriptions
     mock_subscriptions.return_value = []
-    assert (
-        utils.get_all_subscriptions(
-            agendas=[agenda1, agenda2],
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
-        )
-        == {}
-    )
+    assert utils.get_all_subscriptions(agendas=[agenda1, agenda2], pool=pool) == {}
     assert mock_subscriptions.call_args_list == [
         mock.call(
             agenda_slug='agenda-1', date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)
@@ -157,9 +163,7 @@ def test_get_all_subscriptions(mock_subscriptions):
             },
         ],
     ]
-    assert utils.get_all_subscriptions(
-        agendas=[agenda1, agenda2], date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1)
-    ) == {
+    assert utils.get_all_subscriptions(agendas=[agenda1, agenda2], pool=pool) == {
         'user:1': {
             'agenda-1': [
                 {
@@ -203,6 +207,15 @@ def test_get_all_subscriptions(mock_subscriptions):
 
 @mock.patch('lingo.invoicing.utils.get_check_status')
 def test_get_invoice_lines_for_user_check_status_error(mock_status):
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
     mock_status.side_effect = ChronoError('foo baz')
     with pytest.raises(ChronoError):
         utils.get_invoice_lines_for_user(
@@ -210,8 +223,7 @@ def test_get_invoice_lines_for_user_check_status_error(mock_status):
             agendas_pricings=[],
             user_external_id='user:1',
             subscriptions={'foo': 'bar'},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
 
 
@@ -227,6 +239,15 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
         date_end=datetime.date(year=2022, month=10, day=1),
     )
     agenda_pricing.agendas.add(agenda1, agenda2)
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     # no agendas
     assert (
@@ -243,8 +264,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
                     },
                 ],
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -258,8 +278,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
             agendas_pricings=[agenda_pricing],
             user_external_id='user:1',
             subscriptions={},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -282,8 +301,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
                     },
                 ],
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -323,8 +341,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
                     },
                 ],
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -411,8 +428,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
                 },
             ],
         },
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     )
     assert mock_pricing_data_event.call_args_list == [
         mock.call(
@@ -495,6 +511,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
     }
     assert line1.pricing_data == {'foo1': 'bar1', 'pricing': 1}
     assert line1.status == 'success'
+    assert line1.pool == pool
     assert isinstance(line2, DraftInvoiceLine)
     assert line2.invoice is None
     assert line2.slug == 'agenda-1@event-2'
@@ -512,6 +529,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
     }
     assert line2.pricing_data == {'foo2': 'bar2', 'pricing': 2}
     assert line2.status == 'success'
+    assert line2.pool == pool
     assert isinstance(line3, DraftInvoiceLine)
     assert line3.invoice is None
     assert line3.slug == 'agenda-2@eveeent-1'
@@ -529,6 +547,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
     }
     assert line3.pricing_data == {'foo3': 'bar3', 'pricing': 3}
     assert line3.status == 'success'
+    assert line3.pool == pool
     assert isinstance(line4, DraftInvoiceLine)
     assert line4.invoice is None
     assert line4.slug == 'agenda-2@eveeent-2'
@@ -546,6 +565,7 @@ def test_get_invoice_lines_for_user_check_status(mock_pricing_data_event, mock_s
     }
     assert line4.pricing_data == {'foo4': 'bar4', 'pricing': 4}
     assert line4.status == 'success'
+    assert line4.pool == pool
 
 
 @mock.patch('lingo.invoicing.utils.get_check_status')
@@ -559,6 +579,15 @@ def test_get_invoice_lines_for_user_check_status_subscriptions_dates(mock_pricin
         date_end=datetime.date(year=2022, month=10, day=1),
     )
     agenda_pricing.agendas.add(agenda)
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     mock_pricing_data_event.return_value = {'foo': 'bar', 'pricing': 42}
     mock_status.return_value = [
@@ -589,8 +618,7 @@ def test_get_invoice_lines_for_user_check_status_subscriptions_dates(mock_pricin
                     },
                 ],
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -611,8 +639,7 @@ def test_get_invoice_lines_for_user_check_status_subscriptions_dates(mock_pricin
                     },
                 ],
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -644,8 +671,7 @@ def test_get_invoice_lines_for_user_check_status_subscriptions_dates(mock_pricin
                 },
             ],
         },
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     )
     assert len(lines) == 1
     assert mock_pricing_data_event.call_args_list == [
@@ -690,6 +716,15 @@ def test_get_invoice_lines_for_user_check_status_agenda_pricing_dates(mock_statu
         date_end=datetime.date(year=2022, month=11, day=1),
     )
     agenda_pricing3.agendas.add(agenda)
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 1, 1),
+        date_end=datetime.date(2023, 1, 1),
+        date_issue=datetime.date(2023, 1, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     pricing_data_event_patch = mock.patch.object(AgendaPricing, 'get_pricing_data_for_event', autospec=True)
 
@@ -722,8 +757,7 @@ def test_get_invoice_lines_for_user_check_status_agenda_pricing_dates(mock_statu
                         },
                     ],
                 },
-                date_start=datetime.date(2022, 1, 1),
-                date_end=datetime.date(2023, 1, 1),
+                pool=pool,
             )
             assert len(lines) == 1
             assert mock_pricing_data_event.call_args_list[0][0][0] == agenda_pricing1
@@ -757,8 +791,7 @@ def test_get_invoice_lines_for_user_check_status_agenda_pricing_dates(mock_statu
                         },
                     ],
                 },
-                date_start=datetime.date(2022, 1, 1),
-                date_end=datetime.date(2023, 1, 1),
+                pool=pool,
             )
             assert len(lines) == 1
             assert mock_pricing_data_event.call_args_list[0][0][0] == agenda_pricing3
@@ -791,8 +824,7 @@ def test_get_invoice_lines_for_user_check_status_agenda_pricing_dates(mock_statu
                         },
                     ],
                 },
-                date_start=datetime.date(2022, 1, 1),
-                date_end=datetime.date(2023, 1, 1),
+                pool=pool,
             )
             assert len(lines) == 0
             assert mock_pricing_data_event.call_args_list == []
@@ -809,6 +841,15 @@ def test_get_invoice_lines_for_user_check_status_pricing_error(mock_pricing_data
         date_end=datetime.date(year=2022, month=10, day=1),
     )
     agenda_pricing.agendas.add(agenda)
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     mock_pricing_data_event.side_effect = [
         {'foo1': 'bar1', 'pricing': 1},
@@ -860,8 +901,7 @@ def test_get_invoice_lines_for_user_check_status_pricing_error(mock_pricing_data
                 },
             ],
         },
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     )
     assert len(lines) == 3
     line1, line2, line3 = lines
@@ -882,6 +922,7 @@ def test_get_invoice_lines_for_user_check_status_pricing_error(mock_pricing_data
     }
     assert line1.pricing_data == {'foo1': 'bar1', 'pricing': 1}
     assert line1.status == 'success'
+    assert line1.pool == pool
     assert isinstance(line2, DraftInvoiceLine)
     assert line2.invoice is None
     assert line2.slug == 'agenda@event-2'
@@ -899,6 +940,7 @@ def test_get_invoice_lines_for_user_check_status_pricing_error(mock_pricing_data
     }
     assert line2.pricing_data == {'error': {}}
     assert line2.status == 'error'
+    assert line2.pool == pool
     assert isinstance(line3, DraftInvoiceLine)
     assert line3.invoice is None
     assert line3.slug == 'agenda@event-3'
@@ -916,6 +958,7 @@ def test_get_invoice_lines_for_user_check_status_pricing_error(mock_pricing_data
     }
     assert line3.pricing_data == {'foo3': 'bar3', 'pricing': 3}
     assert line3.status == 'success'
+    assert line3.pool == pool
 
 
 @mock.patch('lingo.invoicing.utils.get_invoice_lines_for_user')
@@ -923,21 +966,33 @@ def test_get_all_invoice_lines(mock_user_lines):
     agenda1 = Agenda.objects.create(label='Agenda 1')
     agenda2 = Agenda.objects.create(label='Agenda 2')
     Agenda.objects.create(label='Agenda 3')
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
 
     line1 = DraftInvoiceLine.objects.create(
         quantity=0,
         unit_amount=0,
         total_amount=0,
+        pool=pool,
     )
     line2 = DraftInvoiceLine.objects.create(
         quantity=0,
         unit_amount=0,
         total_amount=0,
+        pool=pool,
     )
     line3 = DraftInvoiceLine.objects.create(
         quantity=0,
         unit_amount=0,
         total_amount=0,
+        pool=pool,
     )
 
     mock_user_lines.side_effect = [[line1, line2], [line3]]
@@ -947,8 +1002,7 @@ def test_get_all_invoice_lines(mock_user_lines):
         utils.get_all_invoice_lines(
             agendas=[agenda1, agenda2],
             subscriptions={},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
         == []
     )
@@ -961,8 +1015,7 @@ def test_get_all_invoice_lines(mock_user_lines):
             'user:1': {'foo': 'bar1'},
             'user:2': {'foo': 'bar2'},
         },
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     ) == [line1, line2, line3]
     assert mock_user_lines.call_args_list == [
         mock.call(
@@ -970,16 +1023,14 @@ def test_get_all_invoice_lines(mock_user_lines):
             agendas_pricings=mock.ANY,
             user_external_id='user:1',
             subscriptions={'foo': 'bar1'},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         ),
         mock.call(
             agendas=[agenda1, agenda2],
             agendas_pricings=mock.ANY,
             user_external_id='user:2',
             subscriptions={'foo': 'bar2'},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         ),
     ]
 
@@ -1029,6 +1080,16 @@ def test_get_all_invoice_lines_queryset(mock_status):
     )
     agenda_pricing22.agendas.add(agenda2)
 
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 11, 1),
+        date_issue=datetime.date(2022, 11, 30),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
+
     mock_status.return_value = [
         {
             'event': {
@@ -1109,8 +1170,7 @@ def test_get_all_invoice_lines_queryset(mock_status):
                     ],
                 },
             },
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 11, 1),
+            pool=pool,
         )
         assert lines
         assert len(ctx.captured_queries) == 7
@@ -1124,6 +1184,16 @@ def test_generate_invoices_from_lines():
     agenda3 = Agenda.objects.create(label='Agenda 3', regie=regie1)
     agenda4 = Agenda.objects.create(label='Agenda 4')  # regie not configured
 
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=True,
+    )
+
     line_error = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-1'},
         quantity=0,
@@ -1132,6 +1202,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:1',
         status='error',
+        pool=pool,
     )
     line1 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-1'},
@@ -1141,6 +1212,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
     line2 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-1'},
@@ -1150,6 +1222,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
     line3 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-2'},
@@ -1159,6 +1232,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
     line4 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-2'},
@@ -1168,6 +1242,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:2',
         status='success',
+        pool=pool,
     )
     line5 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-3'},
@@ -1177,6 +1252,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:2',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
     DraftInvoiceLine.objects.create(  # not used for generation
         event={'agenda': 'agenda-3'},
@@ -1186,6 +1262,7 @@ def test_generate_invoices_from_lines():
         user_external_id='user:2',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
     line6 = DraftInvoiceLine.objects.create(
         event={'agenda': 'agenda-4'},  # regie not configured
@@ -1195,21 +1272,20 @@ def test_generate_invoices_from_lines():
         user_external_id='user:1',
         payer_external_id='user:1',
         status='success',
+        pool=pool,
     )
 
     invoices = utils.generate_invoices_from_lines(
         agendas=[],
         all_lines=[line_error, line1, line2, line3, line4, line5, line6],
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     )
     assert len(invoices) == 0
 
     invoices = utils.generate_invoices_from_lines(
         agendas=[agenda1, agenda2, agenda3, agenda4],
         all_lines=[line_error, line1, line2, line3, line4, line5, line6],
-        date_start=datetime.date(2022, 9, 1),
-        date_end=datetime.date(2022, 10, 1),
+        pool=pool,
     )
     assert len(invoices) == 3
     invoice1, invoice2, invoice3 = invoices
@@ -1220,23 +1296,26 @@ def test_generate_invoices_from_lines():
     assert isinstance(invoice1, DraftInvoice)
     assert invoice1.label == 'Invoice from 2022-09-01 to 2022-09-30'
     assert invoice1.total_amount == 8
-    assert invoice1.date_issue == datetime.date(2022, 10, 1)
+    assert invoice1.date_issue == datetime.date(2022, 10, 31)
     assert invoice1.regie == regie1
     assert invoice1.payer == 'user:1'
+    assert invoice1.pool == pool
     assert list(invoice1.lines.order_by('pk')) == [line1, line2, line5]
     assert isinstance(invoice2, DraftInvoice)
     assert invoice2.label == 'Invoice from 2022-09-01 to 2022-09-30'
     assert invoice2.total_amount == 3
-    assert invoice2.date_issue == datetime.date(2022, 10, 1)
+    assert invoice2.date_issue == datetime.date(2022, 10, 31)
     assert invoice2.regie == regie2
     assert invoice2.payer == 'user:1'
+    assert invoice2.pool == pool
     assert list(invoice2.lines.order_by('pk')) == [line3]
     assert isinstance(invoice3, DraftInvoice)
     assert invoice3.label == 'Invoice from 2022-09-01 to 2022-09-30'
     assert invoice3.total_amount == 4
-    assert invoice3.date_issue == datetime.date(2022, 10, 1)
+    assert invoice3.date_issue == datetime.date(2022, 10, 31)
     assert invoice3.regie == regie2
     assert invoice3.payer == 'user:2'
+    assert invoice3.pool == pool
     assert list(invoice3.lines.order_by('pk')) == [line4]
 
 
@@ -1248,73 +1327,40 @@ def test_generate_invoices(mock_generate, mock_lines, mock_subscriptions, mock_a
     agenda1 = Agenda.objects.create(label='Agenda 1')
     agenda2 = Agenda.objects.create(label='Agenda 2')
     Agenda.objects.create(label='Agenda 3')
-    line1 = DraftInvoiceLine.objects.create(
-        event={'agenda': 'agenda-1'},
-        quantity=1,
-        unit_amount=1,
-        total_amount=1,
-        user_external_id='user:1',
-        payer_external_id='user:1',
-        status='success',
-    )
-    line2 = DraftInvoiceLine.objects.create(
-        event={'agenda': 'agenda-1'},
-        quantity=1,
-        unit_amount=2,
-        total_amount=2,
-        user_external_id='user:1',
-        payer_external_id='user:1',
-        status='success',
-    )
-    line3 = DraftInvoiceLine.objects.create(
-        event={'agenda': 'agenda-2'},
-        quantity=1,
-        unit_amount=3,
-        total_amount=3,
-        user_external_id='user:1',
-        payer_external_id='user:1',
-        status='success',
-    )
-    DraftInvoiceLine.objects.create(
-        event={'agenda': 'agenda-1'},
-        quantity=1,
-        unit_amount=5,
-        total_amount=5,
-        user_external_id='user:2',
-        payer_external_id='user:1',
-        status='success',
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
     )
 
     mock_agendas.return_value = [agenda1, agenda2]
     mock_subscriptions.return_value = {'foo': 'bar'}
-    mock_lines.return_value = [line1, line2, line3]
+    mock_lines.return_value = ['foo', 'bar']
 
     # check only calls between functions
-    utils.generate_invoices(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1))
-    assert mock_agendas.call_args_list == [
-        mock.call(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1))
-    ]
+    utils.generate_invoices(campaign=campaign, draft=True)
+    pool = Pool.objects.latest('pk')
+    assert pool.campaign == campaign
+    assert pool.draft is True
+    assert mock_agendas.call_args_list == [mock.call(pool=pool)]
     assert mock_subscriptions.call_args_list == [
         mock.call(
             agendas=[agenda1, agenda2],
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
     ]
     assert mock_lines.call_args_list == [
         mock.call(
             agendas=[agenda1, agenda2],
             subscriptions={'foo': 'bar'},
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            pool=pool,
         )
     ]
     assert mock_generate.call_args_list == [
         mock.call(
             agendas=[agenda1, agenda2],
-            all_lines=[line1, line2, line3],
-            date_start=datetime.date(2022, 9, 1),
-            date_end=datetime.date(2022, 10, 1),
+            all_lines=['foo', 'bar'],
+            pool=pool,
         )
     ]
 
@@ -1338,7 +1384,54 @@ def test_generate_invoices_cmd():
         assert '%s' % excinfo.value == 'Bad value "bad-value" for date_end'
         assert mock_generate.call_args_list == []
 
+        with pytest.raises(CommandError) as excinfo:
+            call_command('generate_invoices', '2022-09-01', '2022-10-01', '--date-issue=bad-value')
+        assert '%s' % excinfo.value == 'Bad value "bad-value" for date_issue'
+        assert mock_generate.call_args_list == []
+
+        assert Campaign.objects.count() == 0
         call_command('generate_invoices', '2022-09-01', '2022-10-01')
-        assert mock_generate.call_args_list == [
-            mock.call(date_start=datetime.date(2022, 9, 1), date_end=datetime.date(2022, 10, 1))
-        ]
+        assert Campaign.objects.count() == 1
+        campaign = Campaign.objects.latest('pk')
+        assert campaign.date_start == datetime.date(2022, 9, 1)
+        assert campaign.date_end == datetime.date(2022, 10, 1)
+        assert campaign.date_issue == campaign.date_end
+        assert mock_generate.call_args_list == [mock.call(campaign=campaign, draft=False)]
+        mock_generate.reset_mock()
+
+        # again
+        call_command('generate_invoices', '2022-09-01', '2022-10-01')
+        assert Campaign.objects.count() == 1
+        assert mock_generate.call_args_list == [mock.call(campaign=campaign, draft=False)]
+        mock_generate.reset_mock()
+        call_command('generate_invoices', '2022-09-01', '2022-10-01', '--draft')
+        assert Campaign.objects.count() == 1
+        assert mock_generate.call_args_list == [mock.call(campaign=campaign, draft=True)]
+        mock_generate.reset_mock()
+
+        # with overlapping
+        with pytest.raises(CommandError) as excinfo:
+            call_command('generate_invoices', '2022-08-31', '2022-09-02')
+        assert '%s' % excinfo.value == 'Overlapping campaigns already exist'
+        assert mock_generate.call_args_list == []
+        with pytest.raises(CommandError) as excinfo:
+            call_command('generate_invoices', '2022-09-30', '2022-10-02')
+        assert '%s' % excinfo.value == 'Overlapping campaigns already exist'
+        assert mock_generate.call_args_list == []
+
+        # no overlapping
+        call_command('generate_invoices', '2022-08-01', '2022-09-01', '--date-issue=2022-10-31')
+        assert Campaign.objects.count() == 2
+        campaign = Campaign.objects.latest('pk')
+        assert mock_generate.call_args_list == [mock.call(campaign=campaign, draft=False)]
+        assert campaign.date_start == datetime.date(2022, 8, 1)
+        assert campaign.date_end == datetime.date(2022, 9, 1)
+        assert campaign.date_issue == datetime.date(2022, 10, 31)
+        mock_generate.reset_mock()
+        call_command('generate_invoices', '2022-10-01', '2022-11-01')
+        assert Campaign.objects.count() == 3
+        campaign = Campaign.objects.latest('pk')
+        assert mock_generate.call_args_list == [mock.call(campaign=campaign, draft=False)]
+        assert campaign.date_start == datetime.date(2022, 10, 1)
+        assert campaign.date_end == datetime.date(2022, 11, 1)
+        assert campaign.date_issue == campaign.date_end
diff --git a/tests/invoicing/test_models.py b/tests/invoicing/test_models.py
index 27c87fa..4df6d4c 100644
--- a/tests/invoicing/test_models.py
+++ b/tests/invoicing/test_models.py
@@ -2,7 +2,7 @@ import datetime
 
 import pytest
 
-from lingo.invoicing.models import DraftInvoice, DraftInvoiceLine, Invoice, InvoiceLine, Regie
+from lingo.invoicing.models import Campaign, DraftInvoice, DraftInvoiceLine, Invoice, InvoiceLine, Pool, Regie
 
 pytestmark = pytest.mark.django_db
 
@@ -13,9 +13,19 @@ def test_invoice_total_amount(draft):
     invoice_model = DraftInvoice if draft else Invoice
     line_model = DraftInvoiceLine if draft else InvoiceLine
 
-    invoice = invoice_model.objects.create(date_issue=datetime.date.today(), regie=regie)
+    campaign = Campaign.objects.create(
+        date_start=datetime.date(2022, 9, 1),
+        date_end=datetime.date(2022, 10, 1),
+        date_issue=datetime.date(2022, 10, 31),
+    )
+    pool = Pool.objects.create(
+        campaign=campaign,
+        draft=draft,
+    )
+
+    invoice = invoice_model.objects.create(date_issue=datetime.date.today(), regie=regie, pool=pool)
     assert invoice.total_amount == 0
-    invoice2 = invoice_model.objects.create(date_issue=datetime.date.today(), regie=regie)
+    invoice2 = invoice_model.objects.create(date_issue=datetime.date.today(), regie=regie, pool=pool)
     assert invoice2.total_amount == 0
 
     # line with error status, ignored
@@ -25,6 +35,7 @@ def test_invoice_total_amount(draft):
         unit_amount=0,
         total_amount=0,
         status='error',
+        pool=pool,
     )
     invoice.refresh_from_db()
     assert invoice.total_amount == 0
@@ -73,6 +84,7 @@ def test_invoice_total_amount(draft):
         unit_amount=20,
         total_amount=20,
         status='success',
+        pool=pool,
     )
     invoice.refresh_from_db()
     assert invoice.total_amount == 32
@@ -100,6 +112,7 @@ def test_invoice_total_amount(draft):
         unit_amount=20,
         total_amount=20,
         status='success',
+        pool=pool,
     )
     invoice.refresh_from_db()
     assert invoice.total_amount == 12