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CartMobileFrictionTrust

Skip the open promo code box until the shopper asks for one

A one-line "Have a promo code? Enter it on the next page" prompt replaces a visible, blank discount box sitting above the total by default.

Mobile cart showing a one-line "Have a promo code? Enter it on the next page" prompt beneath the checkout button, instead of an open discount input field
Brooklinencartcaptured Jul 2026source

What it is

Instead of an open, empty discount-code input sitting above the total on every visit, the cart carries a single line of text deferring code entry to the next step, so the box only appears once the shopper is actually ready to use one.

Why it works

A visible, empty discount box does something a shopper who was ready to check out did not ask for: it tells them there might be a better price out there and sends them to a search engine to go find it, at which point some fraction never come back. Most shoppers do not have a code. Replacing the open box with a one-line prompt removes that invitation for the majority while still telling the minority who do have a code exactly where to enter it.

How to test it

Hypothesis
Replacing the open promo code box with a deferred one-line prompt will lift checkout completion rate, because shoppers without a code are no longer prompted to leave the cart and search for one.
Primary metric
Checkout completion rate (sessions that reach the cart)
Guardrail metric
Promo code redemption rate, which could fall if shoppers who do have a code miss the deferred prompt entirely

Related ideas

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