diff --git a/ghost/portal/src/data-attributes.js b/ghost/portal/src/data-attributes.js
index 347899d8e4..2ad43ed89a 100644
--- a/ghost/portal/src/data-attributes.js
+++ b/ghost/portal/src/data-attributes.js
@@ -121,15 +121,18 @@ export function planClickHandler({event, el, errorEl, siteUrl, site, member, cli
             }
             return res.json();
         });
-    }).then(function (result) {
-        let stripe = window.Stripe(result.publicKey);
-        return stripe.redirectToCheckout({
-            sessionId: result.sessionId
-        });
-    }).then(function (result) {
-        if (result.error) {
-            throw new Error(result.error.message);
+    }).then(function (responseBody) {
+        if (responseBody.url) {
+            return window.location.assign(responseBody.url);
         }
+        const stripe = window.Stripe(responseBody.publicKey);
+        return stripe.redirectToCheckout({
+            sessionId: responseBody.sessionId
+        }).then(function (redirectResult) {
+            if (redirectResult.error) {
+                throw new Error(redirectResult.error.message);
+            }
+        });
     }).catch(function (err) {
         console.error(err);
         el.addEventListener('click', clickHandler);