Min / Max Repricing Calculator

A repricer with no bounds is a robot that will happily sell your inventory at a loss to win a race nobody asked it to enter. The tool that prevents that isn't the repricer's AI — it's the two numbers you type into its minimum and maximum fields.

This calculator turns your break-even floor and a target margin into those two numbers.

The minimum

Your minimum is your break-even price, full stop. Not "a little above cost" — the actual floor from the Break-Even calculator, including fees and ad spend. Anything lower and the repricer is paying customers to take stock. I've seen sellers set the minimum at COGS and watch the referral + FBA fees eat them alive on every sale.

The maximum

Your maximum is the highest price the repricer should ever show. Two ways to think about it:

1. Floor + target margin — if you want at least 30% margin, your ceiling is floor × 1.30. The repricer can float anywhere below that.
2. Plan + small premium — don't set the max wildly above your planned price or you'll just sit there with no Buy Box and no sales.

Most repricers win the Buy Box in the middle of the range, not at the rock-bottom minimum. So a sensible floor protects your margin, and a sensible ceiling keeps you in the game instead of parked at a price no one clicks.

A caveat on "win the Buy Box"

Chasing the Buy Box at any cost is a trap on thin-margin products. If the only way to win it is below your floor, the right move is to not win it on that item and fix the product economics instead — better sourcing, a better package, or a different product. Repricing can't save a bad margin; it can only spread the losses faster.

Set the bounds once, per product, when you know the real numbers. Then let the tool do the boring work of matching competitors while you sleep soundly knowing it can't go below zero.