Where should your free-shipping threshold actually sit?
Set it too low and you pay shipping on orders you already had. Set it too high and nobody stretches. The zone that moves cart size is 1.2 to 1.4 times your AOV, priced against what absorbing shipping really costs you. Answer four questions and get your number, with the break-even math shown.
A free-shipping threshold is an AOV lever, so it gets set as a multiple of AOV rather than as a round number that looks nice. The zone that changes cart behaviour is 1.2 to 1.4 times average order value, with about 1.3x rounded to a clean figure as the starting point. Then price it: divide your shipping cost by your gross margin and you have the extra order value each qualifying cart must add to pay for the shipping you just absorbed.
- Formula: suggested threshold = AOV x 1.3, rounded to the nearest $5. The zone to test inside is AOV x 1.2 to AOV x 1.4.
- Break-even lift = average outbound shipping cost per order divided by gross margin, in dollars of extra order value per qualifying order.
- Inputs: average order value, gross margin %, average outbound shipping cost per order, and your current threshold if you have one.
- Rule of thumb: a threshold below your AOV gives money away, because you are paying shipping on orders you already had. Above roughly 1.6x AOV, almost nobody stretches.
- Common mistake: setting the threshold and never pricing it. If the break-even lift is bigger than the stretch the threshold asks for, the offer costs more in absorbed shipping than it adds in contribution.
How the number is calculated
Two calculations. The placement: 1.2 to 1.4 times your AOV is the zone where a threshold changes behaviour, and the tool suggests a clean number near 1.3x, rounded to the nearest $5. The affordability: your average shipping cost divided by your gross margin is the extra AOV a qualifying order must add for the offer to pay for itself. The zone is an operator rule from the brands I've operated and advised: treat it as the starting point to test around, not a law.
A threshold is an AOV lever, not a conversion cure: the checkout side of the story lives in the conversion revenue-leak calculator, and if returns are eating the margin the threshold protects, run the returns cost calculator next. All of the free DTC calculators share these benchmarks.