Shoppers abandon carts for many reasons. Price and shipping matter — but so do load time, payment errors, and clunky mobile forms. Those are technical problems with a direct line to revenue.
Technical causes of abandoned checkouts
- Slow payment pages. Third-party scripts and heavy themes inflate LCP on the one page that must feel instant.
- Broken or flaky gateways. Failed tokens, CORS issues, or outdated plugins drop completed orders.
- Mobile friction. Autofill blocked, tiny fields, or layout shifts mid-entry.
- Trust warnings. Mixed HTTP assets on HTTPS checkout scare buyers off.
- Session and cache mistakes. Cart contents vanishing after a page refresh.
What we fix for businesses
WebPulse performance work focuses on the money path: compress and defer non-critical scripts, fix gateway integrations, harden HTTPS, and measure Core Web Vitals on product and checkout URLs — not just the homepage. That sits under Performance optimization and Development support when payment code needs a real fix.
Measure before you redesign
Pull funnel drop-off from analytics, then confirm with WebPageTest on the checkout URL. Redesigns are expensive; fixing a 4-second payment script often isn’t.
Request a free audit if you want a prioritized list tied to lost revenue, not vanity scores.
Bottom line: treat checkout like a production system. Speed and reliability there pay for themselves faster than most marketing tests.