Amazon Repricing Calculator

Whether the volume covers the thinner margin.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

Current price

Proposed price

All costs per unit

Units per month now

Price elasticity

Amazon revises fee schedules at least annually and adds new surcharges more often. These defaults are a starting point, the figures in your own fee preview are the ones that describe your ASINs.

Profit change

−$493

18% volume for -10% price

Profit now$3,162

Units at the new price354

Profit at the new price$2,669

Change−$493

The price cut loses $493 a month. Volume would have to rise 39.8% just to stand still, which implies an elasticity well above the 1.8 entered.

How the Amazon Repricing Calculator works

A price cut only works if the extra volume more than covers the thinner margin, and that depends on elasticity, a number most sellers assume rather than measure. Getting it wrong loses money confidently, because the volume goes up and the profit goes down.

Also known as: Amazon repricer floor calculator · minimum price for repricing · repricing rules calculator

How the number is derived

A repricing rule needs three numbers: a floor, a ceiling, and a rule for moving between them. The floor comes from the break-even calculation plus a required minimum margin; the ceiling from what the listing can hold without losing the Buy Box entirely.

Floor = (cost + fulfilment + storage + target minimum contribution) ÷ (1 − referral rate).

Everything above that is strategy; the floor is arithmetic and it is what stops a repricer doing damage.

An example

Cost $8.50, fulfilment $4.25, storage $0.09, and a required minimum contribution of $4.00. That is $16.84, divided by 0.85 for the referral fee: a floor of $19.81.

A ceiling might be set at $32.99, above the current Buy Box but within the range the listing has historically converted at.

The repricer then operates between $19.81 and $32.99. It can follow a competitor to $20 and stop, which is the point: without the floor it would follow to $17 and destroy $3 a unit while reporting that it had won the Buy Box.

On 1,000 units a month, the floor is worth $3,000 of protected contribution and costs nothing to set.

What it does not tell you

Automated repricing can trigger a race to the bottom where several sellers all reprice against each other in minutes. Floors prevent the damage; they do not prevent the race, and the Buy Box may end up held by whoever has the lowest floor.

Repricing also affects rank and conversion in ways that are hard to attribute, since a lower price improves conversion and a constantly moving price can confuse repeat buyers.

What this changes

Set the floor from a complete cost model including advertising, not from cost of goods alone. A floor set on gross contribution will be below the true break-even once advertising is counted.

Then review the floor whenever costs or fees change. A floor calculated on last year's fee schedule is not a floor, and Amazon revises fees annually.

When repricing helps and when it does not

It helps on commoditised listings with multiple sellers on the same ASIN, where the Buy Box genuinely rotates on price and being a few cents lower wins meaningful share.

It helps far less on a private label listing where you are the only seller. There, price is a strategic decision made deliberately and tested, not an automated response to competitors who do not exist on that ASIN.

The mistake worth avoiding is running an aggressive repricer on a listing you control, where it will steadily discover that lower prices convert better and walk the price down toward the floor over months. On a sole-seller listing, price testing with deliberate steps and a measurement period tells you far more and costs far less than automation designed for a competitive Buy Box.

A maximum daily movement, so the repricer cannot walk a price down by several dollars in an afternoon in response to a competitor who is out of stock. Sharp automated moves are frequently a reaction to a temporary condition rather than a real competitive shift.

Where to go next

The Amazon Repricing question rarely arrives on its own. These are the ones that usually come with it:

Amazon Buy Box Price Calculator — Match the price, or find your floor.
Amazon Profit Margin Calculator — Gross against net, and where the gap goes.
Price Elasticity Calculator — How much demand moves when price does.
Etsy Fee Calculator — Every Etsy fee on one sale, itemised.

Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.

Frequently asked questions

How do I know if a price cut will pay?

Model the volume increase your elasticity implies and compare total contribution before and after. On thin margins the required volume increase is much larger than intuition suggests.

What is price elasticity?

The percentage change in units for a one percent change in price. An elasticity of 1.8 means a 10% price cut sells 18% more units. Above 1 the product is elastic; below 1 a price cut reduces revenue.

How do I measure it?

A controlled test: change price, hold everything else constant including advertising, and measure over enough days to clear noise. Rank effects lag, so a week is usually the minimum useful window.

Should I use automated repricing?

For competitive commodity listings, yes, with a hard floor set from your own costs. Automated repricers without a properly calculated floor are one of the more efficient ways to lose money at scale.