diff --git a/lib/data/models/mixins/invoice_mixin.dart b/lib/data/models/mixins/invoice_mixin.dart
index 371a58158..26d3fa026 100644
--- a/lib/data/models/mixins/invoice_mixin.dart
+++ b/lib/data/models/mixins/invoice_mixin.dart
@@ -60,6 +60,7 @@ abstract class CalculateInvoiceTotal {
     lineItems.forEach((item) {
       final double taxRate1 = round(item.taxRate1, 3);
       final double taxRate2 = round(item.taxRate2, 3);
+      final double taxRate3 = round(item.taxRate3, 3);
 
       final lineTotal = getItemTaxable(item, total, precision);
 
@@ -159,6 +160,7 @@ abstract class CalculateInvoiceTotal {
       final double itemDiscount = round(item.discount, precision);
       final double taxRate1 = round(item.taxRate1, 3);
       final double taxRate2 = round(item.taxRate2, 3);
+      final double taxRate3 = round(item.taxRate3, 3);
       double lineTotal = qty * cost;
 
       if (itemDiscount != 0) {
@@ -182,6 +184,9 @@ abstract class CalculateInvoiceTotal {
       if (taxRate2 != 0) {
         itemTax += round(lineTotal * taxRate2 / 100, precision);
       }
+      if (taxRate3 != 0) {
+        itemTax += round(lineTotal * taxRate3 / 100, precision);
+      }
     });
 
     if (discount != 0.0) {
diff --git a/lib/ui/app/invoice/invoice_item_view.dart b/lib/ui/app/invoice/invoice_item_view.dart
index 560302bfe..9cf74cf06 100644
--- a/lib/ui/app/invoice/invoice_item_view.dart
+++ b/lib/ui/app/invoice/invoice_item_view.dart
@@ -50,6 +50,12 @@ class InvoiceItemListTile extends StatelessWidget {
       subtitle += ' • $taxRate2 ${invoiceItem.taxName2}';
     }
 
+    if (invoiceItem.taxRate3 != 0) {
+      final taxRate3 = formatNumber(invoiceItem.taxRate3, context,
+          formatNumberType: FormatNumberType.percent);
+      subtitle += ' • $taxRate3 ${invoiceItem.taxName3}';
+    }
+
     final List<String> parts = [];
     if (invoiceItem.customValue1.isNotEmpty) {
       parts.add(formatCustomValue(