diff --git a/app/Helpers/Collection/BalanceLine.php b/app/Helpers/Collection/BalanceLine.php
index b5eada6734..0c8ca55853 100644
--- a/app/Helpers/Collection/BalanceLine.php
+++ b/app/Helpers/Collection/BalanceLine.php
@@ -163,7 +163,7 @@ class BalanceLine
         bcscale(2);
         /** @var BalanceEntry $balanceEntry */
         foreach ($this->getBalanceEntries() as $balanceEntry) {
-            $sum = bcsub($sum, $balanceEntry->getLeft());
+            $sum = bcadd($sum, $balanceEntry->getLeft());
         }
 
         return $sum;
diff --git a/app/Helpers/Report/ReportHelper.php b/app/Helpers/Report/ReportHelper.php
index d932be04f2..e6472824c1 100644
--- a/app/Helpers/Report/ReportHelper.php
+++ b/app/Helpers/Report/ReportHelper.php
@@ -164,7 +164,7 @@ class ReportHelper implements ReportHelperInterface
             $spent = $this->query->spentNoBudget($account, $start, $end);
             $left  = $tagRepository->coveredByBalancingActs($account, $start, $end);
             bcscale(2);
-            $diff = bcadd($spent, $left);
+            $diff = bcsub($spent, $left);
 
             // budget
             $budgetEntry = new BalanceEntry;