diff --git a/resources/assets/js/components/base/modal/TaxTypeModal.vue b/resources/assets/js/components/base/modal/TaxTypeModal.vue
index b0c83861..b786744e 100644
--- a/resources/assets/js/components/base/modal/TaxTypeModal.vue
+++ b/resources/assets/js/components/base/modal/TaxTypeModal.vue
@@ -157,7 +157,7 @@ export default {
       },
       percent: {
         required,
-        between: between(0, 100),
+        between: between(-100, 100),
       },
       description: {
         maxLength: maxLength(255),
diff --git a/tests/Feature/InvoiceTest.php b/tests/Feature/InvoiceTest.php
index cd213197..a900af01 100644
--- a/tests/Feature/InvoiceTest.php
+++ b/tests/Feature/InvoiceTest.php
@@ -257,3 +257,31 @@ test('clone invoice', function () {
             'success' => true,
         ]);
 });
+
+test('create invoice with negative tax', function () {
+    $invoice = Invoice::factory()
+        ->raw([
+            'taxes' => [Tax::factory()->raw([
+                'percent' => -9.99
+            ])],
+            'items' => [InvoiceItem::factory()->raw()],
+        ]);
+
+    $response = postJson('api/v1/invoices', $invoice);
+
+    $response->assertOk();
+
+    $this->assertDatabaseHas('invoices', [
+        'invoice_number' => $invoice['invoice_number'],
+        'sub_total' => $invoice['sub_total'],
+        'total' => $invoice['total'],
+        'tax' => $invoice['tax'],
+        'discount' => $invoice['discount'],
+        'user_id' => $invoice['user_id'],
+        'invoice_template_id' => $invoice['invoice_template_id'],
+    ]);
+
+    $this->assertDatabaseHas('invoice_items', $invoice['items'][0]);
+
+    $this->assertDatabaseHas('taxes', $invoice['taxes'][0]);
+});
diff --git a/tests/Feature/TaxTypeTest.php b/tests/Feature/TaxTypeTest.php
index 010ff409..001a3a05 100644
--- a/tests/Feature/TaxTypeTest.php
+++ b/tests/Feature/TaxTypeTest.php
@@ -92,3 +92,15 @@ test('delete tax type', function () {
 
     $this->assertDeleted($taxType);
 });
+
+
+test('create negative tax type', function () {
+    $taxType = TaxType::factory()->raw([
+        'percent' => -9.99
+    ]);
+
+    postJson('api/v1/tax-types', $taxType)
+        ->assertOk();
+
+    $this->assertDatabaseHas('tax_types', $taxType);
+});