Checkout is one of the last places a business wants to lose a customer, yet small problems can make that happen quickly. Too many form fields, unexpected charges, confusing payment options, or a failed transaction can interrupt a purchase that was otherwise ready to be completed.
A well-designed checkout keeps the process short, shows customers exactly what they need to know, and makes payment easy across devices. For businesses, it also needs to work well with different payment methods while handling successful, pending, and failed transactions correctly.
This blog explains how to design a checkout that is easier to complete and where to look when customers are dropping off.
What is Checkout Optimization?
Checkout optimization is the process of making it easier for customers to move from their cart to a confirmed order while removing unnecessary steps or obstacles that can interrupt the purchase.
It covers the journey from reviewing the cart and providing the required order details to selecting a payment method and receiving order confirmation.
Read more about the Checkout Page.
Why Do Shoppers Leave During Checkout?
Customers may leave checkout when the final cost is higher than expected, delivery takes too long, account creation becomes mandatory, or the process asks for too much information. Payment issues can also stop the purchase at the final step, whether because a card is declined, the website runs into an error, or the preferred payment method is unavailable.
According to research published by the Baymard Institute, US online shoppers report several reasons for abandoning their carts. Excluding browsing-related abandonment, the following are among the reasons identified:
| Extra costs were too high | 40% |
| Delivery was too slow | 20% |
| The shopper did not trust the site with card information | 19% |
| The site required account creation | 18% |
| Checkout was too long or complicated | 17% |
| The website had errors or crashed | 17% |
| The total order cost was difficult to see upfront | 12% |
| The shopper's card was declined | 10% |
| There were not enough payment methods | 9% |
Actual reasons for abandonment can vary by business, audience and market.
Checkout forms often become longer as different teams add fields over time. Some information may be useful internally without being necessary to complete the purchase.
Every required field should therefore have a clear purpose.
A typical ecommerce checkout may need:
- Name
- Phone number or email
- Delivery address
- PIN code
- Information required to complete payment
Fields such as company name, secondary phone number, or Address Line 2 should not automatically be mandatory.
Autofill can reduce manual typing further. Standard form fields and appropriate autocomplete settings allow browsers to populate saved names, addresses, and payment details where supported.
The number of checkout steps also matters. A one-page checkout is not always easier than a multi-step checkout. A single page with too many fields can feel more demanding than two or three short steps.
2. Let Customers Buy Without Creating an Account
Requiring customers to create an account adds an unnecessary step before payment.
A first-time shopper may have to create a password, verify an account, and provide information that has little to do with completing the current order. Guest checkout keeps the purchase separate from registration.
A simple flow could look like:
Cart → Contact and delivery details → Payment → Confirmation
Businesses can still offer account creation after the order is placed. At that point, there is a clearer reason for the customer to register, such as saving an address, viewing order history or making future purchases faster. Account creation becomes an option rather than a requirement standing between the customer and payment.
3. Show the Full Payable Amount Before Payment
Customers should know the amount they are agreeing to pay before they select a payment method.
The checkout should clearly show:
- Product subtotal
- Applied discounts
- Delivery charges
- Applicable taxes or fees
- Final payable amount
If a delivery charge depends on the customer's location, update it as soon as enough information is available to calculate it.
Delivery timelines should also appear before the order is placed.
For example, if the customer can choose between free delivery in five days and paid delivery the next day, that choice belongs within the checkout instead of appearing after payment. The customer should not need to reach the final screen to discover either the real cost of the order or when it is expected to arrive.
4. Make the Order Easy to Review and Edit
Customers often check their order one final time before paying.
They should be able to confirm the product, size or variant, quantity, and delivery address without leaving checkout.
An order review could show:
- Product name and image
- Selected variant
- Quantity
- Delivery address
- Chosen delivery option
Editing this information should not restart the checkout. If the customer changes the quantity, goes back to correct an address, or moves between checkout steps, previously entered information should remain available wherever possible.
The aim is to let customers correct a mistake without creating another one.
5. Design the Checkout for Mobile Use
A checkout can be responsive and still be difficult to complete on a phone. Testing mobile checkout involves more than checking whether the page fits on a smaller screen.
Check whether buttons are easy to tap, labels remain readable while typing and important content stays visible when the keyboard opens.
Use suitable keyboard types for fields such as phone numbers and PIN codes. Avoid tiny dropdown menus where typing is faster. Do not divide information such as card or phone numbers into unnecessary separate boxes.
Slow-loading checkout pages can interrupt purchases, particularly on mobile networks. Test the experience on regular mobile devices and everyday network conditions rather than only on high-speed office Wi-Fi.
Payment flows need extra testing because the customer may temporarily leave the website. For example, a UPI payment may open another app for approval. When the customer returns, the merchant page should take them back to the correct order and payment state.
6. Organize Payment Methods So They Are Easy to Find
Supporting several payment methods does not mean showing every possible option on the first screen.
An Indian ecommerce checkout may offer UPI, cards, net banking, wallets, EMI and other payment methods. Displaying every bank, UPI app and card option at once can make the payment area harder to scan.
A cleaner structure is to group related methods:
Customers can then open the category they want and choose a specific option.
If UPI accounts for a large share of completed payments, it can appear more prominently. Use payment-method selection data to determine which options should appear most prominently, while keeping other supported methods easy to find.
Payment analytics should influence the layout instead of assuming the same arrangement works for every merchant.
Read More:How to Add Multiple Payment Methods to Your Checkout Page.
7. Design UPI Checkout Around Current Payment Flows
UPI payments work differently on mobile and desktop, so the checkout should account for that difference. On supported mobile devices, UPI Intent allows customers to select an installed UPI app and approve the payment. The checkout should provide a clear return path to the merchant's website or app. Once the customer returns, the merchant should verify the transaction status through its payment provider before confirming that the order has been paid.
On desktop, businesses can display an order-specific dynamic UPI QR code. Customers can scan it using a supported UPI app on their phone and approve the payment. The checkout should display the payable amount, show the applicable QR validity period, and update the order once payment is verified.
A mobile customer should be able to move into a UPI app without unnecessary steps, while a desktop customer should be able to scan and pay without switching devices awkwardly.
UPI checkout should use payment flows supported by the merchant's payment provider and applicable NPCI requirements. For mobile customers, this generally means offering UPI Intent where supported. For desktop customers, a dynamic UPI QR code allows them to complete the payment using an app on their phone.
Businesses should confirm the availability of any remaining UPI Collect use cases with their payment provider rather than relying on older UPI ID-based checkout implementations.
8. Handle Payment Status Clearly
After a customer initiates payment, the checkout should communicate the transaction status clearly. Once the merchant verifies a successful payment against the correct order, the customer should receive an order confirmation. Pending and failed payments require separate handling so customers know whether to wait, retry or contact support.
| Successful | Verify the payment, update the order status and display an order confirmation with a reference number. |
| Pending | Inform the customer that confirmation is pending. Provide a way to check the status and discourage a second payment while the outcome is unresolved. |
| Failed | Once failure is confirmed, retain the order details and allow the customer to retry or select another payment method. |
| Debited but not confirmed | Ask the customer not to pay again immediately. Check the transaction status and provide a support or refund-resolution path where necessary. |
Payment status should be verified through the payment provider's supported status APIs or authenticated server-side notifications, rather than relying solely on a browser redirect. Systems should also prevent duplicate order creation or fulfilment when the same payment notification is received more than once.
Read More: Why Payments Fail at Checkout
Overall website conversion rate does not show where a checkout problem begins.
Businesses need to look at different stages separately.
| Checkout start rate | Checkout sessions ÷ eligible cart sessions × 100 | How many customers with a cart proceed to checkout. |
| Checkout completion rate | Checkout sessions resulting in a confirmed order ÷ checkout sessions started × 100 | How effectively checkout converts interested customers into completed orders. |
| Drop-off rate by step | Sessions exiting a particular step without progressing ÷ sessions reaching that step × 100 | Which checkout steps lose the most customers. |
| Payment attempt rate | Checkout sessions with at least one payment attempt ÷ checkout sessions started × 100 | Whether customers reach the payment stage or abandon checkout earlier. |
| Transaction success rate | Successful payment attempts ÷ total eligible payment attempts × 100 | How reliably initiated payment transactions are completed. |
| Success rate by payment method | Successful attempts using a particular method ÷ eligible attempts using that method × 100 | Whether certain payment methods have higher failure rates. |
| Payment recovery rate | Orders completed after an initial failed attempt ÷ orders with an initial failed attempt × 100 | How effectively failed payment attempts are recovered through retries or alternative payment methods. |
| Device-wise checkout completion rate | Completed checkout sessions on a device type ÷ checkout sessions started on that device type × 100 | Whether mobile, desktop or other device users experience greater checkout friction. |
Also read: Top Metrics to Track Payment Gateway Performance
Compare these metrics to identify whether customers are abandoning checkout before payment or encountering problems during payment processing.
If customers leave before reaching payment, review the form, order details, delivery information and pricing.
If customers regularly reach payment but transactions do not complete, investigate the payment flow separately.
This helps teams distinguish checkout design problems from payment-processing failures before making changes.
How to Identify and Fix Checkout Drop-Offs
Checkout optimization should start with evidence rather than assumptions. A shorter form or a redesigned payment screen may look better without necessarily improving completed orders.
Businesses can follow this process:
- Find the drop-off point. Track the customer journey from checkout initiation to order completion. Identify whether customers leave while entering details, reviewing charges, selecting a payment method or completing payment.
- Investigate the cause. Review checkout analytics, payment failure reasons, device-specific performance and customer support queries. For example, a high drop-off after delivery charges appear may indicate a pricing transparency issue.
- Make one targeted improvement. Simplify a form, change the placement of a payment method, clarify an error message or improve the transaction recovery flow.
- Measure the outcome. Compare checkout completion rates and relevant payment metrics before and after the change. Where traffic permits, use controlled A/B testing to distinguish the effect of the improvement from normal fluctuations.
- Monitor the payment experience. A redesigned checkout should not introduce new problems such as duplicate payment attempts, broken redirects or incorrect order statuses.
The goal is to identify the specific obstacle, address it and confirm that the change improves the customer journey.
Conclusion
Checkout problems are easier to fix when businesses know exactly where customers are getting stuck. That could mean shortening a form, making charges visible earlier, improving a mobile interaction, or fixing what happens after an unsuccessful payment attempt. The strongest checkout is one where the next action remains easy to understand, including when the payment does not go exactly as planned.
FAQs
Should a multi-step checkout show a progress indicator?
A progress indicator can be useful when checkout has several distinct steps. It tells customers where they are in the process and what remains. Keep the labels simple, such as Details → Delivery → Payment, rather than adding unnecessary stages.
It does not need to dominate the page. Businesses can keep it available through a smaller “Have a promo code?” option so customers with a code can use it without making the field one of the main checkout actions.
Should businesses save customers' payment details for future purchases?
Businesses can offer saved-card payments through compliant card tokenisation arrangements, subject to applicable requirements and customer consent. In India, merchants and payment aggregators must not store customers' actual card-on-file data. Eligible saved-card experiences should use supported tokenisation arrangements involving authorised card networks, issuers or payment providers.
When should an ecommerce checkout be tested again?
Retest checkout after changes to the website, payment gateway, checkout layout, payment methods, plugins, app integrations or major mobile releases. Businesses should also investigate whenever checkout completion or payment success changes noticeably.
