diff --git a/src/pretix/api/serializers/order.py b/src/pretix/api/serializers/order.py
index 12c3174d68..3be4acf29e 100644
--- a/src/pretix/api/serializers/order.py
+++ b/src/pretix/api/serializers/order.py
@@ -704,6 +704,16 @@ class CheckinListOrderPositionSerializer(OrderPositionSerializer):
         if 'answers.question' in self.context['expand']:
             self.fields['answers'].child.fields['question'] = QuestionSerializer(read_only=True)
 
+        if 'addons' in self.context['expand']:
+            # Experimental feature, undocumented on purpose for now in case we need to remove it again
+            # for performance reasons
+            subl = CheckinListOrderPositionSerializer(read_only=True, many=True, context={
+                **self.context,
+                'expand': [v for v in self.context['expand'] if v != 'addons'],
+                'pdf_data': False,
+            })
+            self.fields['addons'] = subl
+
 
 class OrderPaymentTypeField(serializers.Field):
     # TODO: Remove after pretix 2.2
diff --git a/src/pretix/api/views/checkin.py b/src/pretix/api/views/checkin.py
index 7f51c2403b..7a7d50e97a 100644
--- a/src/pretix/api/views/checkin.py
+++ b/src/pretix/api/views/checkin.py
@@ -381,15 +381,21 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
 
     qs = qs.filter(reduce(operator.or_, lists_qs))
 
+    prefetch_related = [
+        Prefetch(
+            lookup='checkins',
+            queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists]).select_related('device')
+        ),
+        Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
+        'answers', 'answers__options', 'answers__question',
+    ]
+    select_related = [
+        'item', 'variation', 'order', 'addon_to', 'order__invoice_address', 'order', 'seat'
+    ]
+
     if pdf_data:
         qs = qs.prefetch_related(
-            Prefetch(
-                lookup='checkins',
-                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists]).select_related('device')
-            ),
-            Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
-            'answers', 'answers__options', 'answers__question',
-            Prefetch('addons', OrderPosition.objects.select_related('item', 'variation')),
+            # Don't add to list, we don't want to propagate to addons
             Prefetch('order', Order.objects.select_related('invoice_address').prefetch_related(
                 Prefetch(
                     'event',
@@ -404,32 +410,39 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
                     )
                 )
             ))
-        ).select_related(
-            'item', 'variation', 'item__category', 'addon_to', 'order', 'order__invoice_address', 'seat'
         )
-    else:
-        qs = qs.prefetch_related(
-            Prefetch(
-                lookup='checkins',
-                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists]).select_related('device')
-            ),
-            Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
-            'answers', 'answers__options', 'answers__question',
-            Prefetch('addons', OrderPosition.objects.select_related('item', 'variation'))
-        ).select_related('item', 'variation', 'order', 'addon_to', 'order__invoice_address', 'order', 'seat')
 
     if expand and 'subevent' in expand:
-        qs = qs.prefetch_related(
+        prefetch_related += [
             'subevent', 'subevent__event', 'subevent__subeventitem_set', 'subevent__subeventitemvariation_set',
             'subevent__seat_category_mappings', 'subevent__meta_values'
-        )
+        ]
 
     if expand and 'item' in expand:
-        qs = qs.prefetch_related('item', 'item__addons', 'item__bundles', 'item__meta_values',
-                                 'item__variations').select_related('item__tax_rule')
+        prefetch_related += [
+            'item', 'item__addons', 'item__bundles', 'item__meta_values',
+            'item__variations',
+        ]
+        select_related.append('item__tax_rule')
 
     if expand and 'variation' in expand:
-        qs = qs.prefetch_related('variation', 'variation__meta_values')
+        prefetch_related += [
+            'variation', 'variation__meta_values',
+        ]
+
+    if expand and 'addons' in expand:
+        prefetch_related += [
+            Prefetch('addons', OrderPosition.objects.prefetch_related(*prefetch_related).select_related(*select_related)),
+        ]
+    else:
+        prefetch_related += [
+            Prefetch('addons', OrderPosition.objects.select_related('item', 'variation'))
+        ]
+
+    if pdf_data:
+        select_related.remove("order")  # Don't need it twice on this queryset
+
+    qs = qs.prefetch_related(*prefetch_related).select_related(*select_related)
 
     return qs
 
diff --git a/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/components/app.vue b/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/components/app.vue
index 6e75db0f4f..f9e0936582 100644
--- a/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/components/app.vue
+++ b/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/components/app.vue
@@ -38,6 +38,7 @@
           <div class="details">
             <code>{{ checkResult.position.order }}-{{ checkResult.position.positionid }}</code>
             <h4>{{ checkResult.position.attendee_name }}</h4>
+            <div v-if="checkResultAddons" class="addons">{{ checkResultAddons }}</div>
             <span v-if="checkResultSubevent">{{ checkResultSubevent }}<br></span>
             <span class="secret">{{ checkResult.position.secret }}</span>
             <span v-if="checkResult.position.seat"><br>{{ checkResult.position.seat.name }}</span>
@@ -265,6 +266,16 @@ export default {
       const date = moment.utc(this.checkinlist.subevent.date_from).tz(this.$root.timezone).format(this.$root.datetime_format)
       return `${name} · ${date}`
     },
+    checkResultAddons() {
+      if (!this.checkResult) return ''
+      if (!this.checkResult.position.addons) return ''
+      return this.checkResult.position.addons.map((addon) => {
+        if (addon.variation) {
+          return `+ ${addon.item.internal_name || i18nstring_localize(addon.item.name)} – ${i18nstring_localize(addon.variation.value)}`
+        }
+        return "+ " + (addon.item.internal_name || i18nstring_localize(addon.item.name));
+      }).join("\n")
+    },
     checkResultSubevent() {
       if (!this.checkResult) return ''
       if (!this.checkResult.position.subevent) return ''
@@ -369,7 +380,7 @@ export default {
         this.$refs.input.blur()
       })
 
-      let url = this.$root.api.lists + this.checkinlist.id + '/positions/' + encodeURIComponent(id) + '/redeem/?expand=item&expand=subevent&expand=variation&expand=answers.question'
+      let url = this.$root.api.lists + this.checkinlist.id + '/positions/' + encodeURIComponent(id) + '/redeem/?expand=item&expand=subevent&expand=variation&expand=answers.question&expand=addons'
       if (untrusted)  {
         url += '&untrusted_input=true'
       }
diff --git a/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/scss/main.scss b/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/scss/main.scss
index 1ba7b37a34..c4ea8e6dd2 100644
--- a/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/scss/main.scss
+++ b/src/pretix/plugins/webcheckin/static/pretixplugins/webcheckin/scss/main.scss
@@ -92,6 +92,9 @@ a.searchresult, .check-result {
     word-break: break-word;
     color: $text-muted;
   }
+  .addons {
+    white-space: pre-line;
+  }
 }
 
 .check-result-status {
diff --git a/src/tests/api/test_checkinrpc.py b/src/tests/api/test_checkinrpc.py
index 95ce87a47f..9fb79cfa67 100644
--- a/src/tests/api/test_checkinrpc.py
+++ b/src/tests/api/test_checkinrpc.py
@@ -737,6 +737,19 @@ def test_question_expand(token_client, organizer, clist, event, order, question)
     assert resp.data["position"]["answers"][0]["question"]["question"]["en"] == "Size"
 
 
+@pytest.mark.django_db
+def test_addons_expand(token_client, organizer, clist, event, order, question, other_item):
+    with scopes_disabled():
+        p = order.positions.first()
+        question[0].save()
+        p.answers.create(question=question[0], answer="3")
+
+    resp = _redeem(token_client, organizer, clist, p.secret, {"answers": {question[0].pk: ""}}, query="?expand=addons&expand=item")
+    assert resp.status_code == 201
+    assert resp.data["status"] == "ok"
+    assert resp.data["position"]["addons"][0]["item"]["id"] == other_item.pk
+
+
 @pytest.mark.django_db
 def test_store_failed(token_client, organizer, clist, event, order):
     with scopes_disabled():