What is checkout completion rate?
Checkout completion rate is the share of shoppers who begin the checkout process and finish it with a paid order, measured over the same period.
Formula
Checkout completion rate = completed orders ÷ checkouts started × 100
Worked example, not a result
Following the drop off to a single step
Say a store records 1,750 started checkouts in a month and 735 paid orders. Completion is 42 percent, so 1,015 people entered the checkout and left without paying.
Step level reporting is what makes that useful. If 610 of the 1,015 stopped on the delivery step, the story is almost certainly cost or timing: a shipping charge that appears for the first time, an estimated arrival date that is later than the buyer expected, or no option to pay more for faster delivery.
If instead most of them stopped on the payment step, the story is different. A missing wallet or local payment method, a card form that rejects a valid entry, or a total that changed between the cart and the payment screen will all end a checkout that was seconds from finishing.
These figures are made up. The habit to copy is reading completion by step rather than as one number.
Why it matters
Checkout completion is the last and most expensive part of the conversion lever. Everything upstream has been paid for, from the ad click to the browsing to the persuasion on the product page, and a buyer lost here costs the store the full acquisition cost with nothing to show for it.
It is also the most fixable. Product pages and offers take judgement and testing, but a checkout losing people to a surprise delivery charge, a forced account, or a payment method the buyer does not use is a problem with a known answer.
For a store owner this is where the four levers meet in one screen. The visitors lever paid to get the person here, order value decides whether the basket cleared the free shipping threshold, and how the payment experience feels shapes whether they come back. Reading completion by step, by device and by country turns that screen into a short list of specific repairs.
Common mistakes
- Treating checkout completion and cart abandonment as the same number. A cart is a maybe, a started checkout is a decision, and lumping them together hides the losses worth fixing.
- Adding fields nobody needs. Company name, a second phone number and a how did you hear about us box each cost completions, especially on a phone.
- Requiring an account before payment. Guest checkout with an invitation to save details afterwards keeps the order and still gets you most of the sign ups.
- Only ever testing the checkout on a laptop. Most stores take most of their sessions on phones, and keyboard, autofill and wallet behaviour there are what decide the rate.
Related terms and answers
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