How ROAS and break-even ROAS work
ROAS (return on ad spend) is revenue divided by ad spend. Break-even ROAS is 1 divided by your profit margin: below it, ads lose money even if revenue looks good. With a 40% margin, break-even ROAS is 2.5x.
How to use the roas and break-even calculator
Enter ad spend and revenue
Type the total you spent on ads and the revenue those ads generated for the same period and channel. Use matching date ranges, and use the revenue attributed to the ads rather than total store revenue.
Add your margin
Enter your gross margin as a percentage, meaning revenue left after the cost of goods and direct delivery costs. Margin turns ROAS into a profit signal, so use a real figure.
Read ROAS and break-even ROAS
ROAS is revenue divided by ad spend. Break-even ROAS is 1 divided by your margin. Compare them directly. If ROAS is above break-even, the ads cover their own cost before overhead.
Check the contribution figure
Contribution is gross profit minus ad spend. A positive number means the campaign added profit after ads. A negative one means you're paying to acquire sales that don't cover the cost of the media.
Test what-if scenarios
Change spend, revenue, or margin to see how the picture shifts. Try a discount that lowers margin, or a price rise that lifts it. You'll see how much profitability depends on factors beyond the ads themselves.
How to read your result
ROAS: the basic ratio
ROAS equals revenue divided by ad spend. A ROAS of 4 means each dollar of ads is tied to four dollars of revenue. It says nothing about profit on its own, because it ignores what it costs you to deliver the product.
Break-even ROAS: your floor
Break-even ROAS equals 1 divided by gross margin. At a 40 percent margin it is 2.5, since you need 2.5 dollars of revenue to keep one dollar after costs. Any ROAS below this loses money on the media alone.
Margin: the hidden driver
Margin sets the whole calculation. Two businesses with the same ROAS can be in opposite positions if one has a 60 percent margin and the other 20 percent. Use gross margin that includes product, shipping, and payment fees where they apply.
Contribution: the bottom line
Contribution equals revenue times margin, minus ad spend. It converts the ratio into dollars you can compare against other uses of budget. Positive contribution means the channel pays for itself before fixed overhead and salaries.
A worked example with hypothetical numbers
Suppose a store spends 5,000 dollars on ads in a month and the platform attributes 15,000 dollars of revenue. ROAS is 15,000 divided by 5,000, which is 3. The store has a 40 percent gross margin, so break-even ROAS is 1 divided by 0.40, or 2.5. These numbers are invented to show the math.
Gross profit on that revenue is 15,000 times 0.40, which is 6,000 dollars. Subtract the 5,000 ad spend and contribution is 1,000 dollars. The campaign clears break-even, but only narrowly. If margin dropped to 30 percent, break-even would rise to about 3.33 and the same ROAS of 3 would lose money.
Common mistakes to avoid
- Judging ROAS without margin. A ROAS figure looks good or bad only relative to margin. A 3x ROAS on a thin-margin product can hide a loss. Always compare ROAS against break-even ROAS before deciding to scale or cut.
- Using revenue from the wrong source. Platform dashboards, analytics, and your sales system often report different revenue. Pick one source and use it consistently. Mixing them produces inflated or deflated ROAS that you can't reproduce or explain.
- Ignoring returns and discounts. Revenue before refunds and discounts overstates the result. Use net revenue where possible, and use a margin that already reflects typical discounting. Otherwise your break-even point comes out lower than reality.
- Mismatched time windows. Spend from one month and revenue from a lagging sales cycle won't line up. For longer buying cycles, compare spend with the revenue it eventually produced, and ignore whatever happened to land in the same weeks.
- Treating break-even as the goal. Break-even means ads pay for themselves. You still have fixed costs and want a return on the risk. Set a target ROAS above break-even that leaves room for overhead and growth.
Frequently asked questions
What is a good ROAS?
It depends on margin. Anything above your break-even ROAS is profitable on a direct basis.
Does this include other costs?
No. Add agency, tool and creative costs to ad spend for a fuller picture.
What is ROAS?
ROAS stands for return on ad spend. It is revenue attributed to ads divided by the amount spent on those ads. A result of 4 means four dollars of revenue for each dollar spent. It measures revenue efficiency and ignores product cost.
How do I calculate break-even ROAS?
Divide 1 by your gross margin written as a decimal. With a 25 percent margin, the calculation is 1 divided by 0.25, which gives 4. At any ROAS below 4, the ads cost more than the gross profit they produce.
What is a good ROAS?
There's no universal number. A good ROAS sits comfortably above your own break-even ROAS and leaves room for overhead. Your margin, pricing, and repeat purchase behavior decide that figure, and an industry average can't.
Should I use gross or net margin?
Use gross margin that includes direct costs such as product, shipping, and payment fees. Net margin includes overhead that doesn't change with each sale, which would overstate how much you need. Gross margin gives a cleaner break-even test.
Why does my platform ROAS differ from analytics?
Platforms and analytics tools attribute conversions differently, use different windows, and may count view-through sales. Neither is wrong, but they answer slightly different questions. Choose one source of truth and keep tracking consistent so trends stay comparable.