Every other calculator gives you a number. This one gives you a verdict — against Launch, Growth, Scale or EBITDA targets, the way a real portfolio is actually run.
Each product gets a stage, stage-based targets, and a flag the moment ACOS drifts — plus a Monday P&L digest and a to-do list ranked by £ impact. Join the early-access list.
There isn't one. There's a good ACOS for a stage: in Launch, up to ~125% of breakeven is rational (you're buying rank and reviews with margin you've budgeted to spend). Growth targets breakeven. Scale runs ~58% of breakeven. EBITDA/harvest ~48%. One account-wide target starves launches and overspends mature products simultaneously.
ACOS measures the ads; TACOS (spend ÷ total sales) measures the business. Falling TACOS with steady revenue = organic rank compounding. Rising TACOS = you're renting revenue. Watch both: this page computes each, with stage-appropriate ceilings.
Your contribution margin before ads, as a % of price — above it, each advertised sale loses money. It needs your true margin (fees, VAT, COGS), which is what our profit calculator gives you in 30 seconds.
They're the live defaults inside SellerMatrix — the FBA app that assigns each ASIN a lifecycle stage and writes you a weekly to-do list ranked by £ impact. This page runs the same engine, by hand.