diff --git a/app/Helpers/Invoice/InvoiceItemSumInclusive.php b/app/Helpers/Invoice/InvoiceItemSumInclusive.php
index 7ca6fb5e2717..af7e98b382ba 100644
--- a/app/Helpers/Invoice/InvoiceItemSumInclusive.php
+++ b/app/Helpers/Invoice/InvoiceItemSumInclusive.php
@@ -353,7 +353,7 @@ class InvoiceItemSumInclusive
             if ($this->sub_total == 0) {
                 $amount = $this->item->line_total;
             } else {
-                $amount = ($this->sub_total > 0) ? $this->item->line_total - ($this->invoice->discount * ($this->item->line_total / $this->sub_total)) : 0;
+                $amount = $this->item->line_total - ($this->invoice->discount * ($this->item->line_total / $this->sub_total));
                 // $amount = $this->item->line_total - ($this->item->line_total * ($this->invoice->discount / $this->sub_total));
             }
             
diff --git a/tests/Unit/InvoiceItemTest.php b/tests/Unit/InvoiceItemTest.php
index 52fa2fbb36c0..fce389a24b47 100644
--- a/tests/Unit/InvoiceItemTest.php
+++ b/tests/Unit/InvoiceItemTest.php
@@ -35,6 +35,64 @@ class InvoiceItemTest extends TestCase
         $this->makeTestData();
     }
 
+
+    public function testDiscountsWithInclusiveTaxes()
+    {
+        $invoice = InvoiceFactory::create($this->company->id, $this->user->id);
+        $invoice->client_id = $this->client->id;
+        $invoice->uses_inclusive_taxes = true;
+        $invoice->is_amount_discount =true;
+        $invoice->discount = 10;
+        
+        $line_items = [];
+              
+        $line_item = new InvoiceItem;
+        $line_item->quantity = 1;
+        $line_item->cost = 100;
+        $line_item->tax_rate1 = 10;
+        $line_item->tax_name1 = 'GST';
+        $line_item->product_key = 'Test';
+        $line_item->notes = 'Test';
+        $line_items[] = $line_item;
+
+        $invoice->line_items = $line_items;
+        $invoice->save();
+
+        $invoice = $invoice->calc()->getInvoice();
+
+        $this->assertEquals(90, $invoice->amount);
+        $this->assertEquals(8.18, $invoice->total_taxes);
+    }
+
+
+    public function testDiscountsWithInclusiveTaxesNegativeInvoice()
+    {
+        $invoice = InvoiceFactory::create($this->company->id, $this->user->id);
+        $invoice->client_id = $this->client->id;
+        $invoice->uses_inclusive_taxes = true;
+        $invoice->is_amount_discount =true;
+        $invoice->discount = -10;
+        
+        $line_items = [];
+              
+        $line_item = new InvoiceItem;
+        $line_item->quantity = -1;
+        $line_item->cost = 100;
+        $line_item->tax_rate1 = 10;
+        $line_item->tax_name1 = 'GST';
+        $line_item->product_key = 'Test';
+        $line_item->notes = 'Test';
+        $line_items[] = $line_item;
+
+        $invoice->line_items = $line_items;
+        $invoice->save();
+
+        $invoice = $invoice->calc()->getInvoice();
+
+        $this->assertEquals(-90, $invoice->amount);
+        $this->assertEquals(-8.18, $invoice->total_taxes);
+    }
+
     public function testDicountsWithTaxes()
     {
         $invoice = InvoiceFactory::create($this->company->id, $this->user->id);
@@ -92,7 +150,7 @@ class InvoiceItemTest extends TestCase
         $this->assertEquals(-9, $invoice->total_taxes);
     }
 
-public function testDicountsWithTaxesPercentage()
+    public function testDicountsWithTaxesPercentage()
     {
         $invoice = InvoiceFactory::create($this->company->id, $this->user->id);
         $invoice->client_id = $this->client->id;