e-commerce mistakes that kill sales, ordered by body count

business · 2026-10-13 · 7 min

most small shops fail the same way: not for lack of products, but for lack of trust at the exact moment money moves. the mistakes below are ordered by how many sales each kills — fix from the top and stop when the numbers say so.

1. shipping costs revealed at checkout

the number-one cart killer worldwide: totals that ambush. show shipping early (product page, estimator, threshold banner) or bake it into prices with a free-shipping line. every hidden fee is a customer trained to abandon. the operations behind the numbers: why do people abandon their carts.

2. no returns answer before the buy button

customers decide to buy when they know un-buying is safe. a returns policy hidden in the footer might as well not exist — surface it on product pages, near the price. 30 days, who pays return shipping, how refunds land: three sentences that close sales. write them with what makes people trust a website.

3. photos that hide the product

one stock-style image, no scale, no detail, no packaging. buyers cannot touch: show every angle, show it used, show size against something known, show what arrives in the box. phone photos of the real item beat renders of a fantasy. images are half the product page; treat the shoot like inventory.

4. checkout as an exam

account required, six steps, surprise fields, coupon box taunting without a code. guest checkout always, fewest fields possible, progress visible, errors explained inline. every field you delete raises completion — remove them until something breaks, then add back one. the account question settled: how do i start an online store.

5. silence after payment

money taken, nothing said: the anxiety window where chargebacks are born. confirm instantly (page + email), state the next step with a date, then tracking when it ships. post-purchase communication is the cheapest retention in e-commerce and the most skipped.

FAQ

which mistake first?

measure your funnel: biggest drop-off between steps names the killer. no data? fix shipping transparency first — statistically it is the killer most often.

do I need a designer or a developer?

mistakes 1-3 and 5 are decisions (words, photos, emails) — yours. mistake 4 may need a developer hour. hire the fix, not the title: designer vs developer.