Post-purchase upsell offer: $5,282 extra revenue in week one
Test run byVastaCRO agency
Commentary byLiftArchiveOur analysis, not theirsShowing a post-purchase upsell to a subset of buyers brought in $5,282.64 of extra revenue in its first week.
Vasta ran this test for an unnamed Shopify store.
The agency reports a monthly contribution of $163,422, but the offer and test setup were not described.
- Extra revenue: $5,282.64 in the first week, with only part of the traffic exposed.
- Reported monthly contribution: $163,422, which appears to be a projection rather than a measured month.
- No conversion rate, take rate or confidence level was shared.
The change
An upsell offer appears after payment, before the order confirmation.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
Buyers finished checkout with no upsell offer after purchase.
Variant
A post-purchase upsell offer was shown to a subset of buyers after they paid. The product and discount offered were not described.
Why it likely won
Our reading of the result, not the practitioner's claim.
- A post-purchase offer comes after payment, so it can't cost the first sale.
- Buyers who just paid are already in a buying mood and their payment details are saved.
- Even a small take rate adds revenue on top of orders the store already had.
Caveats: Very little detail was shared: no description of the offer, sample size or confidence. The monthly figure looks extrapolated from a short test.
Who ran it
Vasta ran this test for a Shopify store (unnamed) and published the results (Vasta case study). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Vasta →
How to run this test on your store
- Hypothesis
- If we show a relevant one-click offer after purchase, then revenue per order will rise because buyers can add an item without re-entering payment details.
- Primary metric
- Revenue per order
- Guardrails
- Upsell take rate
- Refund and cancellation rate
- Customer complaints
- Who should test it
- Stores with consumables or natural add-ons to the main product. It fits less well when products are one-off, high-ticket purchases with no obvious companion item.
Questions
Do post-purchase upsells hurt conversion rate?
They appear after payment, so they shouldn't affect the first sale.
Watch refunds and complaints to make sure buyers aren't confused.
How much can a post-purchase upsell earn?
It depends on the offer and traffic. Here a partial rollout earned $5,282.64 in its first week.
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