Guarantee badge below add to cart: +14.50% conversion rate
Test run byDave DiederenSyntra Labs
Commentary byLiftArchiveOur analysis, not theirsShowing the store's 60-day guarantee as a bold badge under the add to cart button lifted conversion rate by 14.50%. Dave Diederen ran this test, and revenue per visitor rose 14.14%, an estimated A$84,032 a month. The guarantee already existed but had been hidden in the footer.
- +14.50% conversion rate (4.52% to 5.18%), estimated at +1,278 orders a month. The range shown was +3% to +28%.
- +14.14% revenue per visitor (A$3.05 to A$3.48), estimated at +A$84,032 a month.
- +14.69% profit per visitor (A$2.32 to A$2.66), estimated at +A$66,312 a month.
- Average order value: no change, so the gain came from more buyers.
- A second design (Guarantee V1) also beat control but by less: 4.72% conversion and A$3.21 revenue per visitor.
The change
The guarantee moves from the footer to a bold badge under add to cart.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
The product page had no guarantee near the buy button. The 60-day guarantee was only mentioned in the footer, near the terms and conditions.
Variant
A large, high-contrast guarantee badge sat directly under add to cart. It used a short heading plus one line promising a full refund within the guarantee window.
Why it likely won
Our reading of the result, not the practitioner's claim.
- a visible guarantee answers "what if it doesn't work for me?" right when shoppers decide.
- a clear refund promise makes an unfamiliar store feel less risky.
- V2 beat V1, which suggests how bold and prominent the badge is matters, not just its presence.
Caveats: Sample size and test length were not shared. The revenue per visitor range ran from -2% to +33%, so the true lift may be smaller than the headline.
Who ran it
Dave Diederen (@DaveDiederen) shared this test on X. The numbers and screenshots are theirs.
View the original post on X
How to run this test on your store
- Hypothesis
- If we show our existing money-back guarantee as a bold badge under add to cart, then conversion rate will rise because shoppers feel less risk at the moment of purchase.
- Primary metric
- Conversion rate
- Guardrails
- Refund rate
- Average order value
- Profit per visitor
- Who should test it
- Stores that already offer a guarantee or easy returns but don't show it on product pages. It is less useful if the guarantee is already prominent, or if refund costs would wipe out the extra margin.
Questions
Where should a money-back guarantee go on a product page?
In this test, placing it right under the add to cart button lifted conversion rate by 14.50% compared with leaving it in the footer.
Does the design of a guarantee badge matter?
It seems to. Two badge versions were tested, and the bolder V2 clearly beat V1 on conversion and revenue per visitor.
Will showing a guarantee increase refunds?
The post does not report refund rate, so track it as a guardrail. Here profit per visitor still rose 14.69%.
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@oliverkenyon@oliverkenyon@DaveDiederen@DaveDiederen@DaveDiederen@DaveDiederen