Amazon price-change & promotion break-even calculator.

What has to be true for a price change to pay off?

Revenue alone cannot answer that. A discount may increase orders while reducing total contribution. A price increase may improve contribution per unit while reducing orders. Compare both with the same time period and explicit cost assumptions.

Contribution per unit

Net selling price − landed product cost − selling fees − fulfillment − advertising per sold unit − other variable costs

Total contribution

Units sold × contribution per unit

Required new units

Baseline units × baseline contribution per unit ÷ proposed contribution per unit

Sales decline tolerated

(1 − baseline contribution ÷ proposed contribution) × 100%, when proposed contribution is higher and both are positive

Volume lift required

(baseline contribution ÷ proposed contribution − 1) × 100%, when proposed contribution is lower and both are positive

Worked example: a $30 product becomes $33.

Illustrative data only. These are not Amazon fee rates or client results. At $30, subtract $8 product cost, $4.50 selling fees, $5 fulfillment, $3 advertising and $0.50 other costs. Contribution is $9 per unit. At 1,000 units, total contribution is $9,000.

At $33, with selling fees entered as $4.95 and the other assumptions unchanged, contribution becomes $11.55. Required units = 1,000 × $9 ÷ $11.55 = approximately 779.22. At least 780 whole units preserve the $9,000 baseline. The mathematical sales decline tolerance is 22.08%; with whole units, it is 22%. At the illustrative 900-unit scenario, contribution is $10,395, a $1,395 increase.

For a discount to $27, enter selling fees of $4.05 with the same other costs. Contribution becomes $6.45. You need approximately 1,395.35 units, or 1,396 whole units: a 39.6% whole-unit lift. This is a threshold to test against evidence, not a forecast that the discount will produce those orders.

Make the assumptions fit your product.

For the broader decision, read our Amazon pricing and profitability consulting guide.

Enter each scenario separately. Refresh fee estimates when price, fulfillment, product size, category or marketplace changes. Amazon’s official fee and cost estimate guide explains where to find product estimates and how to compare fulfillment methods. This calculator does not contain a current Amazon fee table.

Use total advertising spend divided by all units sold, not ad-attributed orders alone. Keeping advertising per unit unchanged assumes spend scales with volume. Adjust it if your proposed scenario has different ad efficiency. Include promotion fees and expected variable returns or storage costs once under other variable costs. The net price already includes the discount; do not subtract the same discount again.

All values are USD. Contribution is before fixed overhead, tax and financing costs, and is not net profit. Fixed promotion setup fees must be evaluated separately; allocating them per unit is only valid for the volume you assumed. Fee estimates and realized costs may differ. This does not predict demand, determine an optimal price or account for competitor reactions, Buy Box changes, inventory limits, ranking or policy eligibility.

Money inputs accept up to two decimal places. Calculations use integer cents; required units use unrounded contribution, then round upward to whole units. Displayed percentages are rounded to two decimals. Blank, negative, non-finite, overly precise or out-of-range inputs show errors rather than silently becoming zero. Zero and negative contribution still appear in scenario totals, but positive-profit volume thresholds are unavailable.