diff --git a/src/routes/invoices.js b/src/routes/invoices.js
index e490856..dc1896a 100644
--- a/src/routes/invoices.js
+++ b/src/routes/invoices.js
@@ -24,7 +24,28 @@ function calculateNextRecurringDate(invoiceDate, interval) {
     }
     return d.toISOString().split('T')[0];
 }
+/**
+ * Build HTML block for Stripe Payment Link on PDF invoice.
+ * Returns empty string if no link or invoice is already paid.
+ */
+function buildPaymentLinkHtml(invoice) {
+    if (!invoice.stripe_payment_link_url) return '';
+    if (invoice.paid_date || invoice.stripe_payment_status === 'paid') return '';
 
+    return `
+        <div style="margin-top: 30px; padding: 16px 20px; border: 2px solid #635bff; border-radius: 8px; text-align: center;">
+            <p style="font-size: 14px; font-weight: bold; color: #635bff; margin: 0 0 8px 0;">
+                Pay Online — Credit Card or ACH
+            </p>
+            <a href="${invoice.stripe_payment_link_url}" 
+               style="font-size: 13px; color: #635bff; word-break: break-all;">
+                ${invoice.stripe_payment_link_url}
+            </a>
+            <p style="font-size: 11px; color: #888; margin: 8px 0 0 0;">
+                Secure payment powered by Stripe. ACH payments incur lower processing fees.
+            </p>
+        </div>`;
+}
 // GET all invoices
 router.get('/', async (req, res) => {
     try {
@@ -745,7 +766,8 @@ router.get('/:id/pdf', async (req, res) => {
             .replace('{{INVOICE_DATE}}', formatDate(invoice.invoice_date))
             .replace('{{TERMS}}', invoice.terms)
             .replace('{{AUTHORIZATION}}', authHTML)
-            .replace('{{ITEMS}}', itemsHTML);
+            .replace('{{ITEMS}}', itemsHTML)
+            .replace('{{PAYMENT_LINK}}', buildPaymentLinkHtml(invoice));
 
         const pdf = await generatePdfFromHtml(html);
         
@@ -808,7 +830,8 @@ router.get('/:id/html', async (req, res) => {
             .replace('{{INVOICE_DATE}}', formatDate(invoice.invoice_date))
             .replace('{{TERMS}}', invoice.terms)
             .replace('{{AUTHORIZATION}}', authHTML)
-            .replace('{{ITEMS}}', itemsHTML);
+            .replace('{{ITEMS}}', itemsHTML)
+            .replace('{{PAYMENT_LINK}}', buildPaymentLinkHtml(invoice));
 
         res.setHeader('Content-Type', 'text/html');
         res.send(html);
@@ -862,7 +885,8 @@ router.post('/:id/send-email', async (req, res) => {
             .replace('{{INVOICE_DATE}}', formatDate(invoice.invoice_date))
             .replace('{{TERMS}}', invoice.terms)
             .replace('{{AUTHORIZATION}}', authHTML)
-            .replace('{{ITEMS}}', itemsHTML);
+            .replace('{{ITEMS}}', itemsHTML)
+            .replace('{{PAYMENT_LINK}}', buildPaymentLinkHtml(invoice));
         
         const pdfBuffer = await generatePdfFromHtml(html);
 
diff --git a/templates/invoice-template.html b/templates/invoice-template.html
index d81e2c2..7cda1d1 100644
--- a/templates/invoice-template.html
+++ b/templates/invoice-template.html
@@ -282,6 +282,7 @@
                 {{ITEMS}}
             </tbody>
         </table>
+        {{PAYMENT_LINK}}
     </div>
 </body>
 </html>
\ No newline at end of file