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Break-even ACoS for Amazon ads

Type in one unit and what it costs you. You'll see what it keeps before ads, the ACoS your ads must stay under in and out of peak season, and, with your numbers, what the ads gain or lose a month.

It sets the referral fee.

Who ships it
Size and weight, packed
Packed size
Packed weight

We use the top of the band. Over 3 lb starts at 3 lb, so heavier items cost more: choose Exactly for a closer number.

Product, freight, duties and prep, to Amazon's door (or yours if you ship it).

Your ad results
Add more detail (optional)3 of 3 filled

Campaign Manager. With your ACoS, it shows what the ads gain or lose a month.

Campaign Manager, last 30 days, such as 45%.

Orders ÷ clicks, from Campaign Manager. Shows the most a click can cost.

Your numbers stay in this page. Nothing is sent or stored.

Example shop, not yours yet. Type your numbers in the form and press “Work it out”.

Break-even ACoS in peak seasonEstimate

35.5%

October 15, 2026 to January 14, 2027. Outside peak: 36.6%. Ads pay for themselves while your ACoS (ad spend ÷ the sales the ads bring) stays at or under this line, your own margin before ads. At your ACoS of 45%, the ads lose about $127 a month in peak and about $112 outside it, at your numbers.

One unit an ad brings, outside peak season

  • Selling price

    $29.99

  • Referral fee, Home and Kitchen

    15.0% × $29.99

    −$4.50

  • FBA feeEstimate

    large standard, billed on 32 oz, the top of your weight band: $5.82 rate card × 103.5%, with the 3.5% surcharge

    −$6.02

  • What the unit costs you

    −$8.50

  • Kept before the adEstimate

    $29.99 − $4.50 − $6.02 − $8.50

    $10.97

  • Break-even ACoSEstimate

    $10.97 ÷ $29.99

    36.6%

  • Highest cost per click that paysEstimate

    $10.97 × 10% of clicks that order, rounded down to the cent

    $1.09

One unit an ad brings, in peak season (October 15, 2026 to January 14, 2027)

  • Selling price

    $29.99

  • Referral fee, Home and Kitchen

    15.0% × $29.99

    −$4.50

  • FBA fee in peakEstimate

    large standard, billed on 32 oz, the top of your weight band: ($5.82 rate card + $0.32 peak) × 103.5%

    −$6.35

  • What the unit costs you

    −$8.50

  • Kept before the adEstimate

    $29.99 − $4.50 − $6.35 − $8.50

    $10.64

  • Break-even ACoSEstimate

    $10.64 ÷ $29.99

    35.5%

  • Highest cost per click that paysEstimate

    $10.64 × 10% of clicks that order, rounded down to the cent

    $1.06

A month at your ACoS

  • Ad spend a month

    your number

    $600.00

  • Your ACoS

    45%

  • Sales the ads bring

    $600.00 ÷ 45%

    $1,333.33

  • What those sales keep, outside peakEstimate

    $1,333.33 × $10.97 ÷ $29.99

    $487.72

  • Less the ad spend, outside peak

    −$600.00

  • The ads lose, outside peakEstimate

    $487.72 − $600.00

    −$112.28

  • What those sales keep, in peakEstimate

    $1,333.33 × $10.64 ÷ $29.99

    $473.05

  • Less the ad spend, in peak

    −$600.00

  • The ads lose, in peakEstimate

    $473.05 − $600.00

    −$126.95

The fixes

  • In peak season: Bring campaigns to ACoS 35.5% or lowerEstimate

    Worth up to $127 a month

    Lower bids or pause keywords until campaigns run at ACoS 35.5% or lower (Campaign Manager). If ad sales and your other orders hold, you'd keep up to $127 more a month. Cutting ads can cut organic rank and total sales, which is why it's 'up to'. Launches run above break-even on purpose, and attribution windows move ACoS either way.

  • Outside peak season: Bring campaigns to ACoS 36.6% or lowerEstimate

    Worth up to $112 a month

    Lower bids or pause keywords until campaigns run at ACoS 36.6% or lower (Campaign Manager). If ad sales and your other orders hold, you'd keep up to $112 more a month. Cutting ads can cut organic rank and total sales, which is why it's 'up to'. Launches run above break-even on purpose, and attribution windows move ACoS either way.

Good to know

  • The break-even counts what one more sale costs: the referral fee, the FBA fee, storage (with the packed size) and the landed cost. It leaves out the Professional plan's $39.99 a month (one more sale doesn't change it), returns, and stock left over 181 days.
  • Storage isn't counted without the packed size; it lowers the break-even a little, most from October to December.
  • New campaigns often run above break-even on purpose, and ads can lift sales that don't come from a click (other products, later orders), so an ACoS over the line means these ads alone lose money, not that ads are wrong for the product.
  • Assumes the Professional selling plan. On the Individual plan Amazon adds $0.99 for each item sold.
  • Fee Preview in Seller Central shows the real FBA fee for your item.Estimate
  • For context only. Amazon publishes no ACoS benchmark. One ad software company reports a median ACoS of 28.2% across the accounts it manages. Median across 69 managed accounts, Apr–Jun 2026; the middle half ran 16.0% to 63.1%. The line that matters is your own break-even above.Estimate
  • We assumed: FBA fee per unit: $6.02 outside peak, $6.35 in peak (estimates). Estimated from a standard box, 1 to 2 lb, at the top of the band, from third-party 2026 rate cards with the 3.5% surcharge. Your Fee Preview shows the real fee.

Amazon referral fees, the media closing fee and the plans as of October 13, 2026 (sell.amazon.com/pricing, official), checked October 13, 2026. Fixed formulas; no AI computes a number. Estimate The FBA fee, the peak fee and storage come from third-party 2026 rate cards (Amazon's tables are behind the Seller Central login): every figure built on them is marked an estimate. Your Fee Preview shows your real fees.

The rates this uses

Each one links to where it comes from, with that page’s date and the day we checked it. See every rate we use.

One number at a time, or the whole shop at once

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More free calculators

AI agents can run the same calculators through our free MCP server: this one is the tool sellerprofit_amazon_ads_breakeven.

Further reading