diff --git a/src/pretix/base/forms/questions.py b/src/pretix/base/forms/questions.py
index 2cd5936792..59be6e3cc9 100644
--- a/src/pretix/base/forms/questions.py
+++ b/src/pretix/base/forms/questions.py
@@ -1035,6 +1035,18 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             'is_business': ''
         }
 
+    @property
+    def ask_vat_id(self):
+        return self.event.settings.invoice_address_vatid
+
+    @property
+    def address_required(self):
+        return self.event.settings.invoice_address_required
+
+    @property
+    def company_required(self):
+        return self.event.settings.invoice_address_company_required
+
     def __init__(self, *args, **kwargs):
         self.event = event = kwargs.pop('event')
         self.request = kwargs.pop('request', None)
@@ -1046,7 +1058,11 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             kwargs['initial']['country'] = guess_country_from_request(self.request, self.event)
 
         super().__init__(*args, **kwargs)
-        if not event.settings.invoice_address_vatid:
+
+        self.fields["company"].widget.attrs["data-display-dependency"] = f'#id_{self.add_prefix("is_business")}_1'
+        self.fields["vat_id"].widget.attrs["data-display-dependency"] = f'#id_{self.add_prefix("is_business")}_1'
+
+        if not self.ask_vat_id:
             del self.fields['vat_id']
         elif self.validate_vat_id:
             self.fields['vat_id'].help_text = '<br/>'.join([
@@ -1100,13 +1116,13 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             self.data = self.data.copy()
             del self.data[fprefix + 'vat_id']
 
-        if not event.settings.invoice_address_required or self.all_optional:
+        if not self.address_required or self.all_optional:
             for k, f in self.fields.items():
                 f.required = False
                 f.widget.is_required = False
                 if 'required' in f.widget.attrs:
                     del f.widget.attrs['required']
-        elif event.settings.invoice_address_company_required and not self.all_optional:
+        elif self.company_required and not self.all_optional:
             self.initial['is_business'] = True
 
             self.fields['is_business'].widget = BusinessBooleanRadio(require_business=True)
@@ -1123,11 +1139,11 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             label=_('Name'),
             initial=self.instance.name_parts,
         )
-        if event.settings.invoice_address_required and not event.settings.invoice_address_company_required and not self.all_optional:
+        if self.address_required and not self.company_required and not self.all_optional:
             if not event.settings.invoice_name_required:
-                self.fields['name_parts'].widget.attrs['data-required-if'] = '#id_is_business_0'
+                self.fields['name_parts'].widget.attrs['data-required-if'] = f'#id_{self.add_prefix("is_business")}_0'
             self.fields['name_parts'].widget.attrs['data-no-required-attr'] = '1'
-            self.fields['company'].widget.attrs['data-required-if'] = '#id_is_business_1'
+            self.fields['company'].widget.attrs['data-required-if'] = f'#id_{self.add_prefix("is_business")}_1'
 
         if not event.settings.invoice_address_beneficiary:
             del self.fields['beneficiary']
@@ -1153,7 +1169,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             data['vat_id'] = ''
         if data.get('is_business') and not ask_for_vat_id(data.get('country')):
             data['vat_id'] = ''
-        if self.address_validation and self.event.settings.invoice_address_required and not self.all_optional:
+        if self.address_validation and self.address_required and not self.all_optional:
             if data.get('is_business') and not data.get('company'):
                 raise ValidationError({"company": _('You need to provide a company name.')})
             if not data.get('is_business') and name_parts_is_empty(data.get('name_parts', {})):