Checkout UX Checklist: How to Design a Checkout That Converts

What makes a checkout work

A good checkout has no surprises. The buyer knows the final price in advance, types nothing unnecessary, never loses entered data after an error and can reach payment on a phone with one hand.

Use the checklist below to audit your store in about an hour. Every item is a separate reason people close the tab.

Sign-in and registration

• Guest checkout is the default. An account is an option, not a requirement.
• Offer account creation after payment with one click, since email and phone are already filled in.
• Phone number plus one-time code instead of a password if most of your audience is on mobile.
• Signed-in customers get their address and contacts prefilled automatically.

Form fields

• Only what you need to deliver the order. Every field should answer "why do we need this?"
• A single "Full name" field instead of separate first, last and middle name, unless the carrier requires otherwise.
• Correct input types: type="tel" for phone, type="email" for email, so mobile shows the right keyboard.
• autocomplete attributes so the browser can fill data for the user.
• Phone mask with the country code already in place.
• Mark optional fields with the word "optional" rather than adding asterisks to required ones.

<input name="phone" type="tel" autocomplete="tel" inputmode="tel">
<input name="email" type="email" autocomplete="email">
<input name="address" autocomplete="street-address">

Address and delivery

• Address suggestions while typing, or a pin on a map: fewer typos and failed deliveries.
• Delivery cost and time are visible before payment, not revealed on the last step.
• Delivery options listed with price and estimated time next to each one.
• Pickup points shown on a map and as a searchable list.
• A "Note for the courier" field exists but is optional.

Order total

• An order summary on every step: items, quantities, discount, delivery, total.
• No hidden fees on the final screen. Service fees, packaging and shipping are shown upfront.
• The promo code is a collapsed "Have a promo code?" link, not a large empty field that sends people off hunting for coupons.
• Buyers can change quantities or remove items without leaving checkout.

Payment

• Familiar local methods: in Uzbekistan that usually means Payme, Click and Uzcard/Humo cards; for international buyers, Visa/Mastercard through Stripe or a similar provider.
• Cash on delivery if it is common in your niche.
• Payment logos on the selection buttons, since people recognize them faster than text.
• The pay button names the action and the amount: "Pay $48.00", not "Next".
• After payment the buyer lands on a page with the order number and what happens next.

Errors and validation

• Validate a field when the user leaves it, not on every keystroke.
• The error message sits next to the field and says how to fix it: "Enter 9 digits after +998", not "Invalid format".
• Entered data is never wiped after a validation error or a failed payment.
• On a declined payment, show a clear reason and a button to retry or choose another method.
• Disable the submit button while the request is in flight so you do not create duplicate orders.

Mobile layout

• Single column, large fields, tap targets comfortable for a thumb.
• The main button is visible without long scrolling, or pinned to the bottom of the screen.
• Replace dropdowns with radio buttons when there are only a few options.
• The page loads fast on mobile data: no heavy widgets inside checkout.
• Test on real phones, including inexpensive Android devices.

Common mistakes

• Mandatory registration before payment.
• Shipping calculated only on the final step.
• A CAPTCHA on the order form without a real need for it.
• The full site header and menu inside checkout, pulling the buyer back to the catalog.
• No step-by-step analytics, so you cannot see where people drop off.