Break-even ACoS, target ROAS, and true profit at any ad spend level.
Product margins
Campaign data (optional)
Enter a sale price to calculate your break-even ACoS
Amounts are in £. Amazon's fees are part of your costs on Amazon UK; these are the figures fba.tools uses for them.
| Size tier | Fee |
|---|---|
| Small envelope | £1.98 |
| Standard envelope | £2.42 |
| Small parcel | £2.76 |
| Standard parcel | £3.88 |
| Large parcel | £5.31 |
| Extra large | £9.15 |
| Category | Rate |
|---|---|
| Automotive | 12% |
| Baby | 15% |
| Books | 15% |
| Clothing | 15% |
| Electronics | 7% |
| Garden | 15% |
| Health & Beauty | 15% |
| Home & Kitchen | 15% |
| Jewellery | 20% |
| Kitchen | 15% |
| Music | 15% |
| Office | 15% |
| PC | 7% |
| Pet Supplies | 15% |
| Sports | 15% |
| Toys & Games | 15% |
| Video Games | 15% |
Amazon changes its fees from time to time, and some categories have tiered rates or minimum fees. Confirm the rate for your category in Seller Central before you rely on it.
ACoS (Advertising Cost of Sales) is the key metric for measuring Amazon PPC efficiency. Your break-even ACoS is simply your profit margin — if you spend more than your margin on ads, you're losing money on every sale. This calculator shows you exactly where that threshold is.
Most experienced sellers target an ACoS 5–10 percentage points below their break-even to generate meaningful ad profit. For brand awareness or ranking campaigns, some sellers accept ACoS above break-even deliberately — but they should know they're doing so.
FBA Profit Calculator
True net profit after referral fees, FBA fees, COGS, PPC, and VAT.
Fee Calculator
Full referral and FBA fulfilment fee breakdown by category and size tier.
VAT Calculator
VAT liability on Amazon sales, FBA fees, and imports. UK, IE, and EU.
ROAS Calculator
Return on ad spend, ACoS, and ad profitability from any campaign data.