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Best CTA A/B Tests for Checkout Pages

The top-performing cta experiments on checkout pages, ranked by conversion lift. Learn what works and apply these patterns to your own tests.

9
Tests found
44%
Win rate
+4.8%
Avg. winner lift
4
Winners

What Works: CTA on Checkout Pages

Out of 9 cta tests on checkout pages, 44% produced a statistically significant improvement. Winners averaged +4.8% conversion lift.

All 9 Experiments

winner+5.7%

Checkout: Mobile Checkout

Problem: Mobile users experience the checkout differently — smaller screens, touch targets, and limited attention require purpose-built design.

CTAEnergy & Utilitiesn=8,994
winner+4.0%

Checkout: Sticky Call To Action

Problem: Key actions on the checkout disappear as users scroll, creating a gap between intent and the ability to act.

CTACross-Industry
inconclusive+0.9%

Checkout: Step 4 - Authorization Clarity and Prominence

Context: The primary call-to-action on the checkout isn't converting at its potential — design, copy, or placement may be the bottleneck.

CTAEnergy & Utilitiesn=1,174
inconclusive

Checkout: Back Buttons

Context: The primary call-to-action on the checkout isn't converting at its potential — design, copy, or placement may be the bottleneck.

CTACross-Industryn=22,852
winner

Does Pinning a Mobile Checkout CTA Improve Conversion?

Sticky mobile CTAs can compress time-on-page meaningfully (~15% faster) without sacrificing engagement signals — users converted at a directionally higher rate AND moved through the page faster, suggesting reduced hesitation rather than rushed clicks. The result was shipped via 90/10 holdout monitoring rather than traditional 50/50 A/B inference — the high baseline (~85%) and limited mobile traffic made full A/B underpowered, so the team chose a holdout-validated rollout as the deliberate methodology. Bayesian P(variant > control) was ~0.90, supporting the directional ship call. Worth noting: external research flags sticky CTAs as context-dependent — they help when the primary action is buried below the fold, but can hurt on shorter pages where the original CTA is already visible.

CTAEnergy & Utilities
inconclusive

Checkout: Above The Fold Call To Action

Context: The first screen of the checkout must immediately communicate value — if it doesn't, users bounce before scrolling.

CTACross-Industry
winner

Checkout: Filled Or Ghost Buttons

Problem: The primary call-to-action on the checkout isn't converting at its potential — design, copy, or placement may be the bottleneck.

CTACross-Industry
inconclusive

Checkout: No Commitment Default

Context: Friction during the checkout process causes users to abandon right when they're closest to converting.

CTACross-Industry
inconclusive

Checkout: Back Buttons

Context: The primary call-to-action on the checkout isn't converting at its potential — design, copy, or placement may be the bottleneck.

CTACross-Industry

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