Break-Even ROAS: How to Calculate It and Know If Your Ads Make Money
Your ad dashboard says "ROAS 3.3x" and it looks great. But if your margin is 25%, you're losing money on every sale. Here's how to calculate break-even ROAS with one formula.
September 25, 2026 · 2 min read
ROAS is the number everyone checks in Google, Meta and TikTok ads. But ROAS alone doesn't tell you whether your ads are profitable. Break-even ROAS does.
What is ROAS?
ROAS (return on ad spend) shows how much revenue each unit of ad spend brings in:
ROAS = Revenue from ads ÷ Ad spend
Spend $10,000 and get $33,000 in sales from ads, and your ROAS is 3.3x.
Why ROAS misleads
Not all of that $33,000 is yours. You paid for the products, shipping and fees. ROAS ignores those costs, so the same ROAS can mean profit for one business and a loss for another.
The break-even ROAS formula
First find your gross margin:
Gross margin = (Price − Cost of goods) ÷ Price
Then:
Break-even ROAS = 1 ÷ Gross margin
A few examples:
- 25% margin → break-even ROAS 4.00x
- 40% margin → break-even ROAS 2.50x
- 60% margin → break-even ROAS 1.67x
Above that number your ads are profitable. Below it, you lose money on every sale.
A worked example
You spend $10,000, ROAS is 3.3x, so revenue is $33,000. Your margin is 25%.
- Gross profit from sales: 33,000 × 0.25 = $8,250
- Subtract ad spend: 8,250 − 10,000 = −$1,750
The dashboard shows a healthy 3.3x, but you're $1,750 down. Your break-even is 4.00x and you're below it.
The same campaign at a 60% margin: 33,000 × 0.60 = $19,800 gross profit, minus ad spend = +$9,800 profit. Same ROAS, opposite result.
Get your costs right
Break-even ROAS is only as good as your cost figure. On top of the product cost, include:
- Shipping and packaging
- Marketplace and payment fees
- The average cost of returns, if your return rate is high
Leave these out and your margin looks higher, and your break-even ROAS lower, than they really are.
Platform ROAS isn't real ROAS
Ad platforms can each claim the same sale. Google and Meta may both report one order as theirs. Comparing your actual sales with your total ad spend gives a more reliable ROAS than any single dashboard.
What to do
- Work out your average gross margin.
- Find your break-even ROAS (1 ÷ margin).
- Compare each platform's ROAS against it.
- Cut budget on campaigns below break-even and move it to those above.
FirstADS does this for you: it combines your Google, Meta and TikTok spend with your sales, calculates your break-even ROAS and warns you when a campaign is losing money.