diff --git a/src/pretix/base/reldate.py b/src/pretix/base/reldate.py
index 2f8289f89..c945a9377 100644
--- a/src/pretix/base/reldate.py
+++ b/src/pretix/base/reldate.py
@@ -33,6 +33,27 @@ class RelativeDateWrapper:
     def __init__(self, data: Union[datetime.datetime, RelativeDate]):
         self.data = data
 
+    def date(self, event) -> datetime.datetime:
+        from .models import SubEvent
+
+        if isinstance(self.data, datetime.date):
+            return self.data
+        elif isinstance(self.data, datetime.datetime):
+            return self.data.date()
+        else:
+            tz = pytz.timezone(event.settings.timezone)
+            if isinstance(event, SubEvent):
+                base_date = (
+                    getattr(event, self.data.base_date_name)
+                    or getattr(event.event, self.data.base_date_name)
+                    or event.date_from
+                )
+            else:
+                base_date = getattr(event, self.data.base_date_name) or event.date_from
+
+            new_date = base_date.astimezone(tz) - datetime.timedelta(days=self.data.days_before)
+            return new_date.date()
+
     def datetime(self, event) -> datetime.datetime:
         from .models import SubEvent
 
diff --git a/src/pretix/control/forms/event.py b/src/pretix/control/forms/event.py
index b6aef4925..91ffa9e81 100644
--- a/src/pretix/control/forms/event.py
+++ b/src/pretix/control/forms/event.py
@@ -381,9 +381,8 @@ class PaymentSettingsForm(SettingsForm):
     def clean(self):
         cleaned_data = super().clean()
         payment_term_last = cleaned_data.get('payment_term_last')
-        print(payment_term_last)
         if payment_term_last and self.obj.presale_end:
-            if payment_term_last.datetime(self.obj).date() < self.obj.presale_end.date():
+            if payment_term_last.date(self.obj) < self.obj.presale_end.date():
                 self.add_error(
                     'payment_term_last',
                     _('The last payment date cannot be before the end of presale.'),
diff --git a/src/tests/control/test_events.py b/src/tests/control/test_events.py
index cc920e067..14b900f5b 100644
--- a/src/tests/control/test_events.py
+++ b/src/tests/control/test_events.py
@@ -178,6 +178,24 @@ class EventsTest(SoupTest):
         self.event1.presale_end = None
         self.event1.save(update_fields=['presale_end'])
 
+    def test_payment_settings_relative_date_payment_after_presale_end(self):
+        self.event1.presale_end = self.event1.date_from - datetime.timedelta(days=5)
+        self.event1.save(update_fields=['presale_end'])
+        doc = self.post_doc('/control/event/%s/%s/settings/payment' % (self.orga1.slug, self.event1.slug), {
+            'payment_banktransfer__enabled': 'true',
+            'payment_banktransfer__fee_abs': '12.23',
+            'payment_banktransfer_bank_details_0': 'Test',
+            'settings-payment_term_days': '2',
+            'settings-payment_term_last_0': 'relative',
+            'settings-payment_term_last_1': '',
+            'settings-payment_term_last_2': '10',
+            'settings-payment_term_last_3': 'date_from',
+            'settings-tax_rate_default': '19.00',
+        })
+        assert doc.select('.alert-danger')
+        self.event1.presale_end = None
+        self.event1.save(update_fields=['presale_end'])
+
     def test_invoice_settings(self):
         doc = self.get_doc('/control/event/%s/%s/settings/invoice' % (self.orga1.slug, self.event1.slug))
         data = extract_form_fields(doc.select("form")[0])