Why a floor price matters
Winning the buybox by cutting your price only helps if the sale is still profitable. A floor price is the discipline that separates repricing from a race to the bottom: it is the lowest price at which you still keep your target minimum profit after commission, shipping and withholding tax. Below it, every extra sale widens your loss — even while your dashboard revenue climbs.
Floor vs. break-even
Break-even is where profit is zero: (cost + shipping) / ((1 − withholding%) / (1 + VAT%) − commission%). The floor adds your target profit on top. Set the floor — not break-even — as the lower bound for auto-pricing and campaign discounts, so competition never erases your margin. To model discounts, see the break-even calculator and the profit margin calculator.
Using the floor in repricing
A repricer without a real floor is an automatic loss machine. Feed this floor into your repricing rule as the “never go below” limit. Riseluc's margin-protected repricing follows a competitor only down to the floor, holds there, and gives up the buybox on purpose if the rival is selling below their own cost.
Method and sources
Floor = (cost + shipping + target profit) / ((1 − withholding%) / (1 + VAT%) − commission%). The VAT share of a VAT-inclusive price never reaches you, so it is removed before the floor is computed; enter cost and shipping excluding VAT. The tool is marketplace-neutral; enter your exact commission rate and per-sale costs and verify them in your seller panel.