Free tool
ACOS → Profit Calculator
An ACOS that “looks fine” can still lose money once fees and product cost are counted. Find your break-even ACOS — the number your ads must beat for advertised orders to earn anything at all.
From your rate card — the fee calculator can estimate it
Ad spend ÷ ad sales × 100 — from your ads console
What each advertised order really earns
Want to keep this?We'll send the result and the assumptions behind it — no account access, no call required.
Estimates only — commission slabs and fees vary by category, price band and programme, and marketplaces revise them often. Verify against your own Seller Central / seller panel rate card. Your free audit uses your real numbers.
These are estimates. Your free audit finds the real number — from your actual settlement files.
Scan my real account →Assumptions behind the maths
Last reviewed: August 2026
- Break-even ACOS = contribution margin before ads ÷ selling price.
- Marketplace fees are estimated from category-typical slabs; use your settlement data for precision.
- Returns are not modelled here — return-adjusted profit is always lower.
- TACOS (total ad cost of sales) matters once ads drive organic rank; this tool models direct ACOS only.
Why break-even ACOS is the only ads number that matters first
Agencies love reporting impressions and clicks. But profit per advertised order is decided by one comparison: your ACOS versus your break-even ACOS. If your margin structure only supports 20% and campaigns run at 35%, more ad spend just scales the loss. We run ads to an agreed target derived from your real unit economics — that's the whole philosophy of our ads & PPC management service.