diff --git a/doc/development/api/general.rst b/doc/development/api/general.rst
index c9524a9a2d..b17f089131 100644
--- a/doc/development/api/general.rst
+++ b/doc/development/api/general.rst
@@ -23,7 +23,7 @@ There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
    :no-index:
-   :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, build_invoice_data, invoice_line_text
+   :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_expiry_changed, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, invoice_line_text
 
 Check-ins
 """""""""
diff --git a/src/pretix/base/migrations/0290_invoice_plugin_data.py b/src/pretix/base/migrations/0290_invoice_plugin_data.py
deleted file mode 100644
index ca0f9d4e1a..0000000000
--- a/src/pretix/base/migrations/0290_invoice_plugin_data.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# Generated by Django 4.2.17 on 2025-09-09 09:55
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ("pretixbase", "0289_invoiceline_period"),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name="invoice",
-            name="plugin_data",
-            field=models.JSONField(default=dict),
-        ),
-    ]
diff --git a/src/pretix/base/models/invoices.py b/src/pretix/base/models/invoices.py
index 59f4d75e38..60e58c2ee5 100644
--- a/src/pretix/base/models/invoices.py
+++ b/src/pretix/base/models/invoices.py
@@ -201,7 +201,6 @@ class Invoice(models.Model):
     transmission_info = models.JSONField(null=True, blank=True)
 
     file = models.FileField(null=True, blank=True, upload_to=invoice_filename, max_length=255)
-    plugin_data = models.JSONField(default=dict)
 
     objects = ScopedManager(organizer='event__organizer')
 
diff --git a/src/pretix/base/services/invoices.py b/src/pretix/base/services/invoices.py
index dafe036767..a5eb325f91 100644
--- a/src/pretix/base/services/invoices.py
+++ b/src/pretix/base/services/invoices.py
@@ -61,9 +61,7 @@ from pretix.base.models.tax import EU_CURRENCIES
 from pretix.base.services.tasks import (
     TransactionAwareProfiledEventTask, TransactionAwareTask,
 )
-from pretix.base.signals import (
-    build_invoice_data, invoice_line_text, periodic_task,
-)
+from pretix.base.signals import invoice_line_text, periodic_task
 from pretix.celery_app import app
 from pretix.helpers.database import OF_SELF, rolledback_transaction
 from pretix.helpers.models import modelcopy
@@ -364,7 +362,6 @@ def build_invoice(invoice: Invoice) -> Invoice:
         invoice.reverse_charge = reverse_charge
         invoice.save()
 
-        build_invoice_data.send(sender=invoice.event, invoice=invoice)
         return invoice
 
 
diff --git a/src/pretix/base/signals.py b/src/pretix/base/signals.py
index d42188d6af..8e18422008 100644
--- a/src/pretix/base/signals.py
+++ b/src/pretix/base/signals.py
@@ -596,18 +596,6 @@ multiple events. Receivers should return a subclass of pretix.base.exporter.Base
 The ``sender`` keyword argument will contain an organizer.
 """
 
-build_invoice_data = EventPluginSignal()
-"""
-Arguments: ``invoice``
-
-This signal is sent out every time an invoice is built, after the invoice model was created
-and filled and before the PDF generation task is started. You can use this to make changes
-to the invoice, but we recommend to mostly use it to add content to ``Invoice.plugin_data``.
-You are responsible for saving any changes to the database.
-
-As with all event-plugin signals, the ``sender`` keyword argument will contain the event.
-"""
-
 validate_order = EventPluginSignal()
 """
 Arguments: ``payments``, ``positions``, ``email``, ``locale``, ``invoice_address``,