++++ Plate 00 · Break-even ROASCalculator
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What ROAS do your ads actually need to hit?

Break-even ROAS is a margin question, not a media question: 1 divided by your contribution margin per order. Answer a few questions and get three numbers: the ROAS where ads stop losing money, the ROAS that hits your profit target, and the first-order ROAS you can accept if repeat purchases are real.

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By Taylor Sicard · co-founded WIN Brands Group and scaled it past $100M · the same margin-before-media math used across the brands I've operated and advised
The method behind the number
The margin math that sets your ROAS floor.
Consumer Commerce
The max allowable CAC formula
The same margin structure, expressed as a CAC ceiling instead of a ROAS floor.
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Consumer Commerce
Contribution margin per order
How to build the per-order margin this whole calculation stands on, line by line.
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Consumer Commerce
CAC payback by vertical
Directional payback benchmarks by category, and what each number is really telling you.
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Method

How the number is calculated

Three thresholds, all from your margin. Break-even ROAS is 1 divided by your contribution margin per order (as a decimal): at 38%, that's about 2.6x. The profit-target ROAS subtracts what you want to keep before dividing: to keep 10% of ad-driven revenue at a 38% margin, 1 / 0.28, about 3.6x. The LTV-adjusted break-even divides the floor by your lifetime orders, giving the first-order ROAS you can accept when repeat purchases finish the payback. The bands below come from the brands I've operated and advised.

Break-even ROAS under 2.5Contribution margin 40%+: real headroom, most channels can clear it.
Break-even 2.5 to 4Workable, but weak creative or rising CPMs put you underwater fast.
Break-even over 4Contribution margin under 25%: almost no paid channel clears this sustainably. Fix margin before scale.

The same math works blended: divide total revenue by total marketing spend and you have MER, judged against the identical floor. Your ROAS floor converts directly into a CAC ceiling in the max allowable CAC calculator, and the DTC profitability calculator rebuilds the margin structure underneath it. All of the free DTC calculators share these benchmarks.

Questions

Common questions

What is break-even ROAS?
The ROAS where an ad dollar returns exactly enough contribution to cover itself. Below it, every order your ads drive loses money on the first purchase. It is set entirely by your margin structure: 1 divided by your contribution margin per order, as a decimal. Treat it as a floor, not a goal.
What is the break-even ROAS formula?
1 divided by contribution margin. Worked example: at a 38% contribution margin per order, break-even ROAS is 1 / 0.38, about 2.6x. Every dollar of spend needs $2.63 of revenue just to hand back $1.00 of contribution. To keep a profit, subtract your target from the margin first: keeping 10% of revenue at a 38% margin needs 1 / 0.28, about 3.6x.
Why contribution margin and not gross margin?
Because gross margin stops too early. An ad-driven order still has to pay for fulfilment, shipping, and returns before anything is left to cover the ad. Use gross margin and your break-even looks lower than it really is, which is exactly how brands scale spend into losses that only show up at month end.
What is the difference between ROAS and MER?
ROAS is usually quoted per channel or per campaign from platform attribution. MER (marketing efficiency ratio) is blended: total revenue divided by total marketing spend, all channels. The break-even math is identical, 1 over contribution margin, it just applies to the blended number. MER is the honest one to judge, because platforms grade their own homework.
Can I run ads below break-even ROAS?
Deliberately, yes, if your repeat purchase behaviour is real and your cash position can carry the gap. That is what the LTV-adjusted number in this calculator shows: dividing break-even by lifetime orders gives the first-order ROAS you can accept when later orders finish the payback. If the repeats are hope rather than data, running below break-even is just buying revenue at a loss.
Does platform-reported ROAS overstate performance?
Almost always. Platform attribution overcounts: every channel claims the conversions it touched, and several claim the same order. Judge your blended number, total ad-driven revenue over total spend with agency and creative costs included, against the break-even from this calculator, not the in-platform figure.