diff --git a/app.js b/app.js
index 5701337..a11ef86 100644
--- a/app.js
+++ b/app.js
@@ -23,6 +23,7 @@ const REFERRAL_URL = `${API_BASE}/etc/referral`; // POST {referrer,friend_name,f
 const CREDITS_URL = `${API_BASE}/payment/credits`; // hidden form POST → 302 Stripe redirect
 const INVOICES_URL = `${API_BASE}/invoices`; // GET ?email=
 const INVOICE_EMAIL_URL = `${API_BASE}/user`; // POST {email, invoice_email}
+const PORTAL_URL = `${API_BASE}/account/portal`; // GET ?email= → { url }
 const CONTRACT_EXTEND_URL = "https://derez.ai"; // ← replace with Stripe payment link
 const CONTRACT_CANCEL_URL = "https://derez.ai"; // ← replace with Stripe cancellation link
 
@@ -1176,6 +1177,38 @@ async function saveInvoiceEmail() {
   }
 }
 
+async function openBillingPortal() {
+  const btn = document.getElementById("portal-btn");
+  if (!btn) return;
+  if (!currentEmail) {
+    toast("No email found. Please sign in again.", "warning");
+    return;
+  }
+  btnLoad(btn, "");
+  try {
+    const res = await apiFetch(
+      `${PORTAL_URL}?email=${encodeURIComponent(currentEmail)}`,
+    );
+    if (!res.ok) throw new Error(`HTTP ${res.status}`);
+    const data = await res.json();
+    dbg("\u2190 Portal", data);
+    const portalUrl = data.url || (data.data && data.data.url) || data;
+    if (
+      portalUrl &&
+      typeof portalUrl === "string" &&
+      portalUrl.startsWith("http")
+    ) {
+      window.open(portalUrl, "_blank");
+    } else {
+      throw new Error("No portal URL returned.");
+    }
+  } catch (err) {
+    toast(err.message, "error");
+  } finally {
+    btnReset(btn);
+  }
+}
+
 async function loadInvoices() {
   const body = document.getElementById("invoices-body");
   if (!body) return;
diff --git a/index.html b/index.html
index 3063e5d..a7984ec 100644
--- a/index.html
+++ b/index.html
@@ -917,6 +917,22 @@
                             </div>
                         </div>
                         <div class="acct-divider"></div>
+                        <div class="acct-section">
+                            <div class="acct-field-label">
+                                Manage Subscriptions
+                            </div>
+                            <div class="acct-affiliate-row">
+                                <button
+                                    type="button"
+                                    id="portal-btn"
+                                    class="btn btn-ghost btn-sm"
+                                    onclick="openBillingPortal()"
+                                >
+                                    Portal &rarr;
+                                </button>
+                            </div>
+                        </div>
+                        <div class="acct-divider"></div>
                         <div class="acct-section">
                             <div class="acct-field-label">Affiliate Code</div>
                             <div class="acct-affiliate-row">