Improving Your Online Store Checkout: Where Shoppers Drop Out and What to Fix First
A shopper who reaches your checkout has already found a product, decided they want it and started to pay. Losing them at that point is the most expensive kind of drop-off, because every earlier step, from advertising to product photography, has already been paid for.
The good news is that checkout problems are usually specific and fixable. Whether you run a hosted platform or a custom build from an ecommerce development team, the method is the same: measure where people leave, work out why, and fix the cheapest high-impact problem first.
This guide covers how to find the leak, the usual causes, how price display differs between the US and UK, and a sensible order of work.
Find where shoppers actually leave
Start with data rather than opinions. Most platforms include a basic funnel. Shopify, for example, has a conversion rate breakdown report that shows all sessions, sessions with cart additions, sessions that reached checkout and sessions that completed checkout. That tells you whether the problem sits before the checkout or inside it.
To see which checkout step loses people, you need step-level tracking. In Google Analytics 4, a funnel exploration lets you define the steps yourself (cart, contact details, delivery, payment, order confirmation) and see how many users continue or drop off at each one. Split every funnel by device and by new versus returning customers. A checkout that looks acceptable overall often hides one weak segment, typically mobile visitors or first-time buyers.
Numbers show where, not why. Add two inexpensive checks: place a real order yourself on a mid-range phone using mobile data, and read your support inbox and payment provider decline reports for the same period.
The usual causes of checkout abandonment
The same handful of problems appear in almost every store. The Baymard Institute, which publishes long-running checkout research, lists the reasons US shoppers give for abandoning an order, after setting aside people who were only browsing. When we checked the page in October 2026, extra costs such as shipping, tax and fees were the most cited reason at 40 percent, the site requiring an account was cited by 18 percent, and a checkout that was too long or complicated by 17 percent. Treat these as survey answers from one country, not as a prediction for your store.
In practice, the causes to check for are:
- Forced account creation before payment
- Costs that first appear at the last step
- Too many form fields, or fields that do not suit the customer's country
- Slow pages and a weak mobile layout
- Missing payment methods and unclear trust signals
- Errors that clear the form or fail without explanation
Guest checkout, shorter forms and address lookup
If your store requires an account, changing that is normally the first thing to test. Google's web.dev guidance on payment and address forms is direct: make guest checkout the default and do not force users to create an account before buying. You can still offer an account on the confirmation page, when the email address and delivery details are already captured and the customer only needs to choose a password.
Next, count your fields. Every field should either be needed to fulfil the order or be removed. Common candidates are a second phone number, a company name shown to consumers, a separate billing address when it matches delivery, and marketing questions. The same guidance recommends a single name input where possible and correct autocomplete attributes, so the browser can fill in details the shopper has already saved.
Address lookup reduces typing and delivery failures. In the UK, shoppers expect to enter a postcode and pick their address from a list. In the US, type-ahead suggestions and ZIP code driven city and state fields do the same job. Always leave a manual entry option, because lookup data is never complete for new buildings or unusual addresses.
Show the full cost early: US and UK pricing display
Surprise costs are a design problem you can remove. Show delivery options and prices on the product page or in the cart, state free-delivery thresholds plainly, and give an estimated total before the shopper types anything.
United States
US stores commonly show prices before sales tax and add tax at checkout, because the amount depends on where the order is delivered. Shoppers are used to this, but they still react badly to a total that jumps late. An estimate in the cart based on ZIP code, clearly labelled as an estimate, softens that.
United Kingdom
UK consumers expect the displayed price to be the price they pay. Government guidance on the Price Marking Order 2004 defines the selling price shown to consumers for goods as the final price including VAT and all other taxes, and confirms the rules apply to online sales. Separately, the Competition and Markets Authority's price transparency guidance states that hiding mandatory fees, taxes or charges until later in the purchase process, often called drip pricing, is illegal. This is a high-level summary, not legal advice; if you sell to UK consumers, have your pricing display reviewed by someone qualified.
If you sell in both markets from one store, make sure your platform displays prices by region instead of applying one rule everywhere.
Payment methods, wallets and trust
A shopper who cannot pay the way they prefer may simply leave. Check which methods your customers actually use: cards everywhere, plus digital wallets such as Apple Pay and Google Pay, PayPal, and any pay-later option that fits your products and margins. Wallets matter most on mobile, because they supply payment and address details without typing a card number on a small screen.
Trust is mostly built by clarity, not by badges. Show delivery times, the returns policy and contact details before the payment step, in plain language, and keep the checkout on your own recognizable domain and design. For the engineering side, our web application security checklist covers the controls behind those signals.
Mobile layout, speed and errors
Complete a purchase on a phone and note every moment of friction. Typical findings are small tap targets, the wrong keyboard for numeric fields, a promo code box that dominates the screen, and an order summary that hides the total. Slow pages need attention too. Third-party scripts added to the checkout over the years are a frequent cause.
Error handling deserves its own review. A form that reloads empty after a declined card or a mistyped postcode gives the shopper a reason to stop. Validate each field as it is completed, explain the problem next to the field, keep everything already entered, and make a failed payment easy to retry with a different method.
Common mistakes when changing a checkout
The most common mistake is changing several things at once and then being unable to say which one helped or hurt. Where traffic allows, run a controlled A/B test: one change, both versions live at the same time, and a decision made on completed orders and revenue per visitor instead of clicks. Let the test cover full weeks so weekday and weekend behavior are both included.
Low-traffic stores cannot reach reliable test results in a reasonable time. In that case, make one change at a time, compare like-for-like periods, and avoid judging a change during a sale or a large marketing campaign. Other mistakes include copying a large retailer's layout without its context, removing fields that fraud checks or couriers depend on, and adding upsells inside the payment step.
What to fix first
Order the work by likely impact against effort. For most stores that gives a sequence like this:
- Fix anything broken: payment errors, failing address validation, forms that lose data.
- Enable guest checkout and show delivery costs and the estimated total early.
- Add the wallets and payment methods your customers already use.
- Cut fields, add autofill support and address lookup.
- Improve mobile layout and page speed, then test larger redesigns.
Hosted platforms handle several of these through settings. Custom or heavily modified checkouts need development time, so write down the current funnel numbers first. Without a baseline you cannot tell whether the work paid for itself.
Conclusion
Improving an online store checkout is less about redesign and more about removing specific obstacles in a sensible order. Measure the funnel step by step, repair what is broken, let people buy without an account, show the full cost early in the way each market expects, offer familiar payment methods, and test each change so you know what worked.
If your checkout is custom built or your platform's settings will not get you there, Entrant Technologies builds and modifies ecommerce websites and apps. You can request a quote with your current funnel figures and the steps where shoppers are leaving.