What break-even ROAS tells you
Break-even ROAS (BEROAS) is the return on ad spend at which an ad neither makes nor loses money on the order it wins. Below it, every sale the ad buys costs more than it contributes. Above it, the ad starts funding your fixed costs and profit. Nobody can hand you this number - it falls straight out of your own margin.
Break-even ROAS = 1 ÷ contribution margin before marketing
| Contribution margin before marketing | Break-even ROAS |
|---|---|
| 60% | 1.67x |
| 50% | 2.00x |
| 40% | 2.50x |
| 30% | 3.33x |
| 25% | 4.00x |
Same ad performance, different verdicts. A 2.8x ROAS clears the bar comfortably at a 50% margin and loses money at 30%, because the margin, not the ad, decides what good looks like.
What goes into contribution margin
Contribution margin before marketing is what's left of each order after every variable cost except the ads: landed product cost (not the factory price), pick, pack and shipping, payment fees, and returns. Leave out fixed costs like rent, salaries and software, and leave out the ad spend itself - that's the thing the ROAS is measuring. If you sell apparel or anything with heavy returns, use the post-returns number. At a 25% return rate the bar moves a full row against you before the auction even starts.
Break-even ROAS during a sale
A discount comes straight out of your margin, because the product and the shipping cost the same whatever you charge. Your margin on a discounted order is roughly (margin - discount) ÷ (1 - discount): a 40% margin with 20% off becomes (0.40 - 0.20) ÷ 0.80 = 25%, and break-even ROAS jumps from 2.5x to 4.0x. Add your discount to the calculator above and it works this out for you.
| Margin at full price | Full price | 20% off | 30% off |
|---|---|---|---|
| 60% | 1.67x | 2.00x | 2.33x |
| 50% | 2.00x | 2.67x | 3.50x |
| 40% | 2.50x | 4.00x | 7.00x |
| 30% | 3.33x | 8.00x | No ROAS is enough |
When the discount reaches your margin, the order contributes nothing, so no ROAS is high enough to break even. That's why ads that made money in October can lose it in Black Friday week, and why Peak Season & Promotions engineers bundles and gift-with-purchase underneath the headline discount instead of leaning on a flat percent-off alone.
Break-even is the floor, not the target
Clearing break-even only covers the order and the ad that won it. Fixed costs and profit come out of whatever sits above the line, so don't park at it. Strong operators run at 1.5-2x their own break-even. And treat a result close to the bar as provisional: platform-reported ROAS has run over-attributed since iOS 14, so wait until your bank statement agrees.
Grade it on acquisition ROAS, not MER
Break-even ROAS is an acquisition test, so compare it with the ROAS of the campaigns that win new customers - ideally new-customer ROAS from prospecting. Blended MER (total revenue ÷ total ad spend) counts revenue from customers the ads never bought, like email, SMS and organic, and it's graded against stage bands instead: roughly 1.5-2.5x at $1-5M, rising to 3.5-6.0x+ past $25M. Because MER includes that revenue, clearing this bar on MER proves nothing about acquisition. The full treatment lives in Finance & Unit Economics.
If you're below the bar
There are only two levers. Lift ROAS through the offer, the creative and the targeting, or lift contribution margin so the bar itself drops - five points of margin moves a 40% brand's bar from 2.50x to 2.22x. Going underwater on the first order can be a deliberate choice, but only when your repeat data, not your hopes, shows the cash coming back inside a hard payback window. The allowable CAC calculator shows how far you can go, and Can I scale ads? tells you whether the next dollar of spend still pays.
Enter your numbers once and every calculator on this site reads from them. Sign in and use them from your dashboard to save them to your brand and pick them up on any device. The doctrine behind this one lives in Finance & Unit Economics.
Common questions
What is break-even ROAS (BEROAS)?
Break-even ROAS is the return on ad spend at which an ad neither makes nor loses money on the order it wins. It equals 1 divided by your contribution margin before marketing, so a brand with a 40% margin breaks even at 2.5x ROAS.
How do you calculate break-even ROAS?
Divide 1 by your contribution margin before marketing, written as a decimal. At a 50% margin, 1 ÷ 0.5 = 2.0x. Contribution margin is revenue minus landed product cost, pick, pack and shipping, payment fees and returns, before any ad spend.
How does a discount change break-even ROAS?
It raises it, because the discount comes straight out of your margin. Your margin on a discounted order is roughly (margin - discount) ÷ (1 - discount), so a 40% margin with 20% off becomes 25%, and break-even ROAS rises from 2.5x to 4.0x. Add your discount to the calculator on this page and it works out your sale bar for you.
What is a good break-even ROAS?
There is no universal good number, because your own margin sets it. A lower break-even means a thicker margin and more room in the auction. The healthier goal is to run your acquisition campaigns at 1.5-2x your break-even, not at it.
Is break-even ROAS the same as target ROAS?
No. Break-even is the floor where an ad only pays for itself and the order it won. Your target sits above it, because fixed costs and profit have to come out of the surplus.
Should I compare break-even ROAS with MER?
No. Compare it with acquisition ROAS, ideally new-customer ROAS from prospecting campaigns. MER counts revenue the ads did not buy, such as email and organic, so clearing this bar on MER proves nothing about acquisition. It is graded against the stage bands instead.
What if my ROAS is below break-even?
Every ad dollar is coming back as less contribution than it cost, so more volume digs the hole faster. Lift ROAS through the offer, creative and targeting, or lift contribution margin so the bar drops. Only go underwater on the first order if your repeat data proves the cash comes back inside a hard payback window.