Your dashboard shows revenue.
What does your store really keep?
Type your numbers. This quick estimate runs in your browser; your individual inputs stay on your device. Enter your email to unlock the detailed result and get the hidden-fee checklist.
One public audit: a dashboard-style margin of +$2.24/order reconciled to −$1.87 after fees, refunds and CPA. Your store will differ; this check gives you an estimate to investigate.
Your dashboard-style margin looks like €16.99 — the real one is €11.09. That €5.90 gap is the part nobody itemizes.
Your real number is ready.
Unlock the detailed estimate free — we'll also send the hidden-fee checklist to your inbox.
Free · no card · your store's numbers never leave your browser.
Why operators use this
- 1Instant estimateYour modeled margin and breakeven CPA update as you type — no waiting, no report to request.
- 2Free — an email unlocks itNo card, no trial, no call. Your result plus the hidden-fee checklist, straight to your inbox.
- 3Private by designThe math runs in your browser. Your numbers never leave your device or hit a server.
- 4Useful math, with limitsIt uses the inputs you enter for fees, refunds and CPA. The full audit checks a wider evidence set.
- 5A CPA to investigateUse the estimate to question the ceiling in your ad account before you scale.
This is the quick check. Want the full audit?
The check above is intentionally incomplete. Margin Killer runs a broader audit: FX conversion, dispute fees, fixed costs, worst / median / best scenarios, and visible assumptions. In the public example, the quick check estimated −€0.95; the full audit reconciled −€1.87. Your result depends on the evidence you provide.
Get the full Margin Killer audit — €17 →Instant delivery · Works with Claude · All sales final
Margin Killer €17: itemized audit, scenarios, assumptions, and the next fee lines worth verifying.