A customer who adds an item to the cart has already done the hard part. They found you, understood the product and decided it was worth money. When they leave at checkout, something between intent and completion told them to stop. The job of a checkout audit is to find that something, not to blame the customer.
This audit is designed for stores doing enough volume to have data but not enough to have a dedicated conversion team. Work through it in order. Fix the biggest friction first, then measure again before changing anything else.
Start with the numbers you already have
Before touching design, pull four figures: cart-to-checkout rate, checkout-to-payment rate, average order value and mobile share of sessions. If checkout-to-payment is below roughly 70% on desktop or 60% on mobile, the problem is likely in the form, payment step or trust signals. If cart-to-checkout is the weak link, the cart page and shipping expectations deserve attention first.
Segment by device and by new versus returning customers. A checkout that works for returning desktop buyers can still be hostile to a first-time mobile buyer.
The 12 fixes, in priority order
| # | Fix | Typical impact | Effort |
|---|---|---|---|
| 1 | Show shipping cost before the checkout form | High | Low |
| 2 | Offer guest checkout above account creation | High | Low |
| 3 | Reduce form fields to what you actually use | High | Low |
| 4 | Accept wallets and local payment methods | High | Medium |
| 5 | Fix mobile keyboard, autofill and input types | Medium | Low |
| 6 | Make errors specific and inline | Medium | Low |
| 7 | Put trust signals next to the pay button | Medium | Low |
| 8 | Remove cross-sells that distract at payment | Medium | Low |
| 9 | Show delivery dates, not vague ranges | Medium | Medium |
| 10 | Speed up the checkout template | Medium | Medium |
| 11 | Send a useful abandoned-cart sequence | Medium | Medium |
| 12 | Test the full flow with real cards and real phones | High | Low |
1. Show shipping before the form
Unexpected shipping cost is the most cited reason for abandonment, and it is entirely preventable. Put a shipping estimate on the cart page, or at the top of checkout before the customer invests effort. Free-shipping thresholds should show how much remains, not hide until the final step.
2. Make guest checkout the default
Account creation is a benefit for you and a chore for the customer. Offer guest checkout as the primary path and invite account creation after payment, when the value is obvious. If you need accounts for subscriptions, say so and explain why.
3. Delete fields you do not use
Count every field and ask who reads it. Company name, second address line, phone number and "how did you hear about us" are frequent offenders. Each removed field reduces friction and error rate. For phone number, if you need it for delivery, label it clearly and explain that it will not be used for marketing.
4. Offer the payment methods your buyers use
Cards are not universal. Wallets such as Apple Pay and Google Pay remove typing on mobile. Local methods, bank transfers and buy-now-pay-later options can matter in specific markets, but each adds complexity. Add the ones your customers ask for, not the ones a vendor pitch recommends.
5. Treat mobile input as a design constraint
Use the right input types so phones open the right keyboard: email, telephone, numeric for card fields. Enable autofill and address lookup. Make tap targets at least 44 pixels. Test on a real mid-range Android phone, not only an iPhone on office Wi-Fi.
6. Write errors that help
"Invalid input" is not an error message. Say which field failed, why, and what to do. Keep the customer's entered data after a failed submission. Inline validation on blur is usually better than a red summary at the top after a full-page reload.
7. Put trust where the decision happens
A padlock in the footer does nothing. Place the return policy, secure-payment note and support contact next to the pay button. Show the total clearly, including tax and shipping, so the final charge is not a surprise. If you use a well-known payment provider, its mark is a stronger signal than a generic badge.
8. Remove distractions at payment
Cross-sells belong on the cart page. At payment, the only useful actions are completing the order, editing the order and getting help. Remove the newsletter modal, the chat bubble that covers the pay button and the banner advertising a sale that does not apply.
9. Give a delivery date
"3–5 business days" is a range. "Order today, arrives Thursday" is a promise. Use carrier data where possible. If you cannot promise a date, explain the cut-off time and the reason for the range. Set expectations before the customer asks.
10. Measure checkout speed separately
Your homepage may be fast while checkout loads a dozen scripts. Test the checkout URL directly on a throttled connection, with an empty and a full cart. Remove tag managers, heatmap scripts and chat widgets from checkout unless they earn their weight. Payment iframes are often the slowest element and are outside your control, so keep everything around them lean.
11. Make recovery emails useful
A single "you left something behind" email is table stakes. A useful sequence has three parts: a reminder with the cart contents, a reassurance message answering common objections such as returns or delivery, and a final nudge before the cart expires. Do not discount immediately; you train customers to abandon on purpose.
12. Buy something yourself every month
Use a real card, a real address and a real phone. Try a failed payment, a wrong postcode and a return. Watch where you hesitate. The founder's monthly test catches broken integrations before customers do, and it is the cheapest QA you will ever run.
A 30-day audit plan
- Week 1: Instrument the funnel, record a mobile session and list every field and script in checkout.
- Week 2: Fix shipping visibility, guest checkout and field count. Ship the changes together.
- Week 3: Test payment methods, error states and trust placement. Run five usability sessions with real customers.
- Week 4: Optimise speed, rewrite the recovery sequence and document the flow so it does not regress.
What not to do
Do not run a full redesign and a pricing test in the same week. Do not add a countdown timer that resets on refresh; customers notice. Do not hide the total to make the cart look cheaper. Do not use fake urgency, fake stock counts or pre-ticked add-ons. These tactics can lift a short-term metric and destroy repeat purchase, which is the metric that pays for the store.
The bottom line
Checkout conversion is rarely a single brilliant idea. It is the removal of a dozen small doubts: what will shipping cost, can I pay my way, will this arrive, can I return it, is my data safe. Fix those and the same traffic produces more revenue without a bigger ad budget.
Start with one change, measure it for two weeks and keep a written log. A store that improves checkout by two percentage points every quarter compounds faster than one chasing a redesign every year.
