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Break-even ROAS & ACOS Calculator

Calculate maximum ad cost, break-even ROAS, break-even ACOS and maximum CPC from expected order contribution.

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Paid Commerce Economics

Break-even ROAS & ACOS Calculator

Calculate mathematical advertising thresholds from retained revenue, selling fees and pre-ad order costs.

Advertising threshold

2.89× break-even ROAS

34.66% break-even ACOS based on gross average order value.

Maximum ad cost / order

$27.38

Maximum CPC

$0.88

At 3.2% conversion rate

Current ROAS

3.70×

Current ACOS

27.03%

Per-order economics

Expected values before advertising.

Retained revenue
$74.26
Selling fees
$11.88
Pre-ad contribution
$27.38

Modeled campaign contribution

$1,570.82

Attributed orders × pre-ad contribution − current spend

Break-even thresholds are mathematical planning limits, not bidding recommendations or performance forecasts. Validate attribution, refund timing, incrementality and customer lifetime value separately.

About the Break-even ROAS & ACOS Calculator

Break-even ROAS & ACOS Calculator starts with average order value, expected returns, selling fees and product plus fulfillment cost to calculate contribution available before advertising.

That contribution becomes the maximum mathematical ad cost per order. The tool expresses it as break-even ACOS, break-even ROAS and a maximum CPC based on the entered conversion rate.

Current spend, attributed revenue and attributed orders provide a separate campaign comparison. These thresholds are planning limits, not bid recommendations, attribution validation or performance forecasts.

Key features

  • Retained-revenue and fee adjustment
  • Pre-ad contribution per order
  • Maximum ad cost per order
  • Break-even ROAS and ACOS
  • Conversion-rate-based maximum CPC
  • Current campaign comparison
  • Local TXT export

How to use

  1. 1Enter before-tax AOV and product plus fulfillment cost.
  2. 2Add selling-fee and expected-return rates.
  3. 3Enter the landing-page conversion rate for the CPC threshold.
  4. 4Add current spend, attributed revenue and orders.
  5. 5Compare current metrics with mathematical break-even thresholds.

Examples

Paid marketplace campaign
Input: AOV, product and fulfillment cost, fees, returns, conversion rate and current campaign totals
Output: Break-even ROAS, ACOS, maximum CPC and modeled campaign contribution

Validate incrementality and customer lifetime value separately.

Frequently asked questions

How is break-even ACOS calculated?
Maximum ad cost per order divided by gross average order value.
How is break-even ROAS calculated?
Gross average order value divided by maximum ad cost per order.
Does maximum CPC guarantee profitability?
No. It assumes the entered conversion rate and per-order economics remain stable.
Does this validate attribution?
No. Platform-attributed revenue can include non-incremental orders or use different attribution windows.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.