How do I add and redirect to a custom payment site from the checkout page?

Topic summary

Main issue: Store owners want to redirect customers from Shopify checkout to a custom payment site, passing order ID, price, and other parameters.

Key guidance shared:

  • Direct checkout code modifications are not allowed unless on the Shopify Plus plan (which permits checkout customization).
  • A workaround is to add an external option as a Manual payment method, where customers pay off-site and the merchant manually approves the order afterward.

Latest updates:

  • The original poster accepted the limitation and requested a script/example for implementing the redirect on Plus, and asked how to add a custom payment method to any store.
  • Another participant has the same need, cannot find an option to upgrade to Shopify Plus, and can’t locate documentation on creating custom checkout redirects.

Definitions:

  • Shopify Plus: Higher-tier plan with access to checkout customization features.
  • Manual payment method: Offsite payment arrangement requiring manual order approval.

Status/outstanding questions:

  • No code, steps, or confirmation on redirect implementation were provided.
  • How to perform the redirect on Plus and how to upgrade/access Plus remain unanswered. The discussion is open with pending guidance on implementation details.
Summarized with AI on January 20. AI used: gpt-5.

Hi,

I want to redirect to my custom payment website from the checkout page. I am confused how to redirect with order id , price and other custom parameter.

Hi there @ankushc03 !

I’d like to share some info with you here on what might be possible in terms of linking a custom payment method, and what would not be possible.

You mentioned specifically wanting to redirect from the checkout page to this method, but it would not be possible to modify the code of the checkout area unless your store is on a Shopify Plus plan.

It may be possible for you to link to an external site or payment method by setting it up as a manual payment method.

Manual payment methods allow your customer to arrange to receive their payment in a way that works best for them.

You can send an invoice to your customer and after you receive the payment, you can then manually approve the order.

Can you tell me a bit more about your custom payment method and how it’s provided so we can check for any way you can add this to your store together?

I agreed. May you please share the script how to redirect for plus plan . I want to add custom payment method to any store .

Hi,

I have the same requirement - to redirect to a custom payment gateway at checkout. I do not see any option to upgrade to Shopify PLUS plan and can not find any information on creating custom redirects from checkout anywhere. Can you please assist.