diff --git a/app/Abstracts/Report.php b/app/Abstracts/Report.php
index 65a6e2375..c4d744f2d 100644
--- a/app/Abstracts/Report.php
+++ b/app/Abstracts/Report.php
@@ -546,11 +546,19 @@ abstract class Report
 
     public function divArithmeticAmount(&$current, $amount)
     {
+        if ($amount == 0) {
+            throw new \InvalidArgumentException('Division by zero is not allowed');
+        }
+
         $current = $current / $amount;
     }
 
     public function modArithmeticAmount(&$current, $amount)
     {
+        if ($amount == 0) {
+            throw new \InvalidArgumentException('Modulo by zero is not allowed');
+        }
+
         $current = $current % $amount;
     }
 
diff --git a/app/Models/Document/Document.php b/app/Models/Document/Document.php
index bb4c94fd8..9bc22c0da 100644
--- a/app/Models/Document/Document.php
+++ b/app/Models/Document/Document.php
@@ -355,7 +355,11 @@ class Document extends Model
         if ($discount) {
             $sub_total = $this->totals->where('code', 'sub_total')->makeHidden('title')->pluck('amount')->first();
 
-            $percent = number_format((($discount * 100) / $sub_total), 0);
+            if ($sub_total && $sub_total > 0) {
+                $percent = number_format((($discount * 100) / $sub_total), 0);
+            } else {
+                $percent = 0;
+            }
         }
 
         return $percent;
diff --git a/app/Reports/TaxSummary.php b/app/Reports/TaxSummary.php
index 5c47fbe40..d2db1aa3f 100644
--- a/app/Reports/TaxSummary.php
+++ b/app/Reports/TaxSummary.php
@@ -126,8 +126,12 @@ class TaxSummary extends Report
                 }
 
                 if ($date_field == 'paid_at') {
-                    $rate = ($item->amount * 100) / $type_item->amount;
-                    $item_amount = ($item_total->amount / 100) * $rate;
+                    if ($type_item->amount != 0) {
+                        $rate = ($item->amount * 100) / $type_item->amount;
+                        $item_amount = ($item_total->amount / 100) * $rate;
+                    } else {
+                        $item_amount = $item_total->amount;
+                    }
                 } else {
                     $item_amount = $item_total->amount;
                 }