diff --git a/App/components/po/po-line-items-editor.tsx b/App/components/po/po-line-items-editor.tsx
index 1caeead..7fd3fbd 100644
--- a/App/components/po/po-line-items-editor.tsx
+++ b/App/components/po/po-line-items-editor.tsx
@@ -282,6 +282,7 @@ export function LineItemsEditor({
               const qtyChanged = orig && Number(orig.quantity) !== item.quantity;
               const priceChanged = orig && Number(orig.unitPrice) !== item.unitPrice;
               const nameChanged = orig && orig.name !== item.name;
+              const gstChanged = orig && Number(orig.gstRate ?? 0.18) !== (item.gstRate ?? 0.18);
               const taxableAmt = item.quantity * item.unitPrice;
               const gstAmt = taxableAmt * (item.gstRate ?? 0.18);
               const acct = item.accountId ? accountMap[item.accountId] : null;
@@ -305,7 +306,10 @@ export function LineItemsEditor({
                     <span className={priceChanged ? "text-amber-700 font-medium" : ""}>{formatCurrency(item.unitPrice)}</span>
                   </td>
                   <td className="py-2 pl-4 text-right">{formatCurrency(taxableAmt)}</td>
-                  <td className="py-2 pl-4 text-right text-neutral-500">{Math.round((item.gstRate ?? 0.18) * 100)}%</td>
+                  <td className="py-2 pl-4 text-right text-neutral-500">
+                    {gstChanged && <span className="block text-neutral-400 line-through text-xs">{Math.round((orig.gstRate ?? 0.18) * 100)}%</span>}
+                    <span className={gstChanged ? "text-amber-700 font-medium" : ""}>{Math.round((item.gstRate ?? 0.18) * 100)}%</span>
+                  </td>
                   <td className="py-2 pl-4 text-right">{formatCurrency(taxableAmt + gstAmt)}</td>
                   {showAccount && (
                     <td className="py-2 pl-4 text-xs text-neutral-500 font-mono">