diff --git a/app/Repositories/Category/SingleCategoryRepository.php b/app/Repositories/Category/SingleCategoryRepository.php
index 5c3bf5481c..8393eb8689 100644
--- a/app/Repositories/Category/SingleCategoryRepository.php
+++ b/app/Repositories/Category/SingleCategoryRepository.php
@@ -54,27 +54,6 @@ class SingleCategoryRepository extends ComponentRepository implements SingleCate
         return true;
     }
 
-    /**
-     * TODO this method is not optimal, and should be replaced.
-     *
-     * @deprecated
-     *
-     * @param Category       $category
-     * @param \Carbon\Carbon $start
-     * @param \Carbon\Carbon $end
-     *
-     * @return string
-     */
-    public function earnedInPeriod(Category $category, Carbon $start, Carbon $end)
-    {
-        $sum = $category->transactionjournals()->transactionTypes([TransactionType::DEPOSIT])->before($end)->after($start)->get(['transaction_journals.*'])
-                        ->sum(
-                            'amount'
-                        );
-
-        return $sum;
-    }
-
     /**
      * Returns an array with the following key:value pairs:
      *
diff --git a/app/Repositories/Category/SingleCategoryRepositoryInterface.php b/app/Repositories/Category/SingleCategoryRepositoryInterface.php
index 4b4a5e2f4e..ccad049bad 100644
--- a/app/Repositories/Category/SingleCategoryRepositoryInterface.php
+++ b/app/Repositories/Category/SingleCategoryRepositoryInterface.php
@@ -37,17 +37,6 @@ interface SingleCategoryRepositoryInterface
      */
     public function destroy(Category $category);
 
-    /**
-     * @deprecated
-     *
-     * @param Category       $category
-     * @param \Carbon\Carbon $start
-     * @param \Carbon\Carbon $end
-     *
-     * @return string
-     */
-    public function earnedInPeriod(Category $category, Carbon $start, Carbon $end);
-
     /**
      * Returns an array with the following key:value pairs:
      *