diff --git a/app/AccountType.php b/app/AccountType.php
index cb3f05e..f2089d1 100644
--- a/app/AccountType.php
+++ b/app/AccountType.php
@@ -25,4 +25,31 @@ class AccountType extends Model
     {
         return $this->accountClass->ioType();
     }
+
+    /*
+     * Get all account types which are expeditures.
+     *
+     * @return Illuminate\Database\Eloquent\Collection
+     */
+    public static function expeditures()
+    {
+        return AccountType::whereHas('accountClass', function ($query) {
+            $query->whereHas('ioType', function ($query) {
+                $query->where('i_o_types.name', 'Ausgabe');
+            });
+        })->get();
+    }
+
+    /*
+     * Get all account types which are incomes.
+     *
+     * @return Illuminate\Database\Eloquent\Collection
+     */
+    public static function incomes() {
+        return AccountType::whereHas('accountClass', function ($query) {
+            $query->whereHas('ioType', function ($query) {
+                $query->where('i_o_types.name', 'Einnahme');
+            });
+        })->get();
+    }
 }