The Complete Guide to Break-Even ROAS
By Arshi Khan, Founder of Just4Marketing · Last reviewed October 2026
Return on ad spend (ROAS) tells you how much revenue each ad dollar brings in, but a 'good' ROAS depends entirely on your margins. A 3× ROAS can be very profitable for one product and lose money on another. This guide shows how to find the break-even ROAS for your own costs, and the ROAS you need to hit a target profit.
The formulas
Profit before ads = price − product cost − shipping − fees. Break-even ROAS = price ÷ profit before ads. Target ROAS = price ÷ (profit before ads − price × target margin).
A $50 product costing $15 with $5 shipping and 10% fees leaves $25 before ads, so break-even ROAS is 2.00× (50% ACoS). To keep a 15% profit margin after ads, you need a ROAS of 2.86×.
Profit at different ROAS levels
| ROAS ($50 product, $25 before ads) | Ad cost per sale | Profit per sale |
|---|---|---|
| 1.5× | $33.33 | −$8.33 |
| 2.0× (break-even) | $25.00 | $0.00 |
| 3.0× | $16.67 | $8.33 |
| 4.0× | $12.50 | $12.50 |
Using break-even ROAS
Set it per product
Products with different margins need different ROAS targets. A single account-wide target over-spends on low-margin items.
Count repeat purchases
If customers reorder, a first-order ROAS slightly below break-even can still be profitable over their lifetime.
Check platform attribution
Ad platforms often credit themselves for sales that would have happened anyway. Compare with total store revenue.
Frequently asked questions
What is break-even ROAS?
It's the return on ad spend at which a sale exactly covers its product cost, shipping, fees, and the ad spend that won it — zero profit, zero loss. Break-even ROAS = selling price ÷ profit per sale before ads.
What's the difference between ROAS and ACoS?
ROAS is revenue ÷ ad spend; ACoS (advertising cost of sales, used on Amazon) is ad spend ÷ revenue — the inverse, shown as a percentage. A 2× ROAS is a 50% ACoS. Your break-even ACoS equals your margin before ads.
Is a higher ROAS always better?
Not necessarily. Pushing ROAS higher usually means spending less and reaching fewer buyers. Many brands deliberately run close to their target ROAS to grow sales volume, as long as each order is still profitable.
Should I include returns in the calculation?
Yes, if they're significant. Use the return cost calculator to find the cost of returns spread over every order and add it to your shipping and handling cost.