diff --git a/app/Invoice/Actions/MassStoreAction.php b/app/Invoice/Actions/MassStoreAction.php
index dc0d2555..7176fc88 100644
--- a/app/Invoice/Actions/MassStoreAction.php
+++ b/app/Invoice/Actions/MassStoreAction.php
@@ -35,20 +35,12 @@ class MassStoreAction
 
         $memberGroup = Member::payable()->get()
             ->groupBy(fn ($member) => "{$member->bill_kind->value}{$member->lastname}{$member->address}{$member->zip}{$member->location}");
+
         foreach ($memberGroup as $members) {
-            $invoice = Invoice::createForMember($members->first());
-
-            foreach ($members as $member) {
-                foreach ($member->subscription->children as $child) {
-                    $invoice->positions()->create([
-                        'description' => str($child->name)->replace('{name}', $member->firstname . ' ' . $member->lastname)->replace('{year}', (string) $year),
-                        'price' => $child->amount,
-                        'member_id' => $member->id,
-                    ]);
-                }
-            }
-
-            $invoices->push($invoice);
+            $invoice = Invoice::createForMember($members->first(), $members, $year);
+            $invoice->save();
+            $invoice->positions()->createMany($invoice->positions);
+            $invoices->push($invoice->fresh('positions'));
         }
 
         event(new InvoicesMassStored($year, $invoices));
diff --git a/app/Invoice/Models/Invoice.php b/app/Invoice/Models/Invoice.php
index bec47aa3..3f731fd4 100644
--- a/app/Invoice/Models/Invoice.php
+++ b/app/Invoice/Models/Invoice.php
@@ -9,6 +9,7 @@ use App\Invoice\InvoiceDocument;
 use App\Invoice\RememberDocument;
 use App\Member\Member;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Eloquent\Collection;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
@@ -40,9 +41,12 @@ class Invoice extends Model
         return $this->hasMany(InvoicePosition::class);
     }
 
-    public static function createForMember(Member $member): self
+    /**
+     * @param Collection<int, Member> $members
+     */
+    public static function createForMember(Member $member, Collection $members, int $year): self
     {
-        return static::create([
+        $invoice = new static([
             'to' => [
                 'name' => 'Familie ' . $member->lastname,
                 'address' => $member->address,
@@ -55,6 +59,20 @@ class Invoice extends Model
             'usage' => 'Mitgliedsbeitrag für ' . $member->lastname,
             'mail_email' => $member->email_parents ?: $member->email,
         ]);
+
+        $positions = collect([]);
+        foreach ($members as $member) {
+            foreach ($member->subscription->children as $child) {
+                $positions->push([
+                    'description' => str($child->name)->replace('{name}', $member->firstname . ' ' . $member->lastname)->replace('{year}', (string) $year),
+                    'price' => $child->amount,
+                    'member_id' => $member->id,
+                ]);
+            }
+        }
+        $invoice->setRelation('positions', $positions);
+
+        return $invoice;
     }
 
     public static function booted(): void