diff --git a/app/Http/Controllers/Json/BoxController.php b/app/Http/Controllers/Json/BoxController.php
index d8c1ac707f..8f05de1985 100644
--- a/app/Http/Controllers/Json/BoxController.php
+++ b/app/Http/Controllers/Json/BoxController.php
@@ -130,7 +130,7 @@ class BoxController extends Controller
                 $boxTitle         = (string)trans('firefly.left_to_spend');
                 $activeDaysLeft   = $this->activeDaysLeft($start, $end);   // see method description.
                 $display          = 1;                                     // not overspent
-                $leftPerDayAmount = bcdiv($leftToSpendAmount, (string)$activeDaysLeft);
+                $leftPerDayAmount = 0 === (int) $activeDaysLeft ? $leftToSpendAmount : bcdiv($leftToSpendAmount, (string)$activeDaysLeft);
                 app('log')->debug(sprintf('Left to spend per day is %s', $leftPerDayAmount));
             }
         }