Why post-purchase upsells matter
It’s the only upsell with zero checkout risk: the sale is already banked, so the offer can’t cost the conversion, only add to it. Buyers are also at peak agreement, they just said yes, and the one-click mechanics remove every friction except the decision itself, which is why the format became the default AOV lever in modern checkout stacks.
Running the post-purchase slot
- Offer what the order impliesThe refill, the accessory, the second unit discounted
- Honor the one-click promiseNo forms, instant add, same shipment where possible
- Cap the sequenceOne offer, maybe a down-sell after a no, never a corridor
- Test by order contextWhat converts after product A isn’t what converts after B
Questions
Why not just offer it before payment?
Because pre-payment offers can cost the order: every added decision before the card clears is abandonment risk. Post-purchase moves the ask to where a no costs nothing, which changes the math of how aggressive an offer can afford to be.
What should the offer discount, if anything?
Whatever the margin survives at the attach rates the slot earns: many stores run the second unit or the consumable at a real discount, knowing the incremental order carries no acquisition cost. The floor is contribution, not habit.