Know your break-even ROAS before you scale.

Is your actual ROAS above break-even?

A break-even result tells you the threshold your order economics require. It does not tell you what a campaign actually earned. First use the revenue and ad spend ROAS calculator for the same campaign and period, then compare that result with the threshold above. Keep the revenue definition consistent: a gross platform purchase value should not be compared directly with a threshold based on net sales after refunds.

Above break-even can still miss your profit goal

Consider an illustrative store with $100 net revenue and $40 contribution before ads per order. Its break-even ROAS is $100 ÷ $40 = 2.50x. At $1,000 ad spend and $3,000 net revenue, actual ROAS is 3.00x. Those 30 orders produce $1,200 contribution before ads, leaving $200 after advertising. That is a 6.67% post-ad contribution margin, before fixed overhead and taxes.

If the store wants 10% of net revenue left after ads, its target is 1 ÷ (0.40 − 0.10) = 3.33x, rounded. A 3.00x result clears break-even but misses that target. Use the target ROAS calculator with a desired profit margin to reserve an amount above the acquisition floor. A desired margin equal to or greater than the pre-ad contribution margin cannot be achieved with positive ad spend under this model.

Below break-even: identify the constraint

Before cutting spend across the account, check whether the gap comes from conversion rate, average order value or contribution per order. The guide to improving ROAS without just cutting ad spend walks through those decisions. Work on one measurable constraint, allow for conversion and return delays, and compare contribution after ads alongside the ROAS ratio. A higher ratio alone does not prove that total profit increased.

Translate the target into a traffic decision

With $40 contribution per order and a 2% click-to-sale conversion rate, break-even average CPC is $40 × 0.02 = $0.80. Reserving $10 per order lowers the target CPC to ($40 − $10) × 0.02 = $0.60. Test your own conversion-rate assumptions in the maximum CPC scenario comparison. This is an economic ceiling, not a promise that an ad platform can deliver those clicks.

Finally, use the blended marketing efficiency calculator to compare total business revenue with total marketing spend. Keep that business-wide check separate from attributed campaign ROAS; overlapping attribution and returning customers can make channel totals misleading.

Reviewed October 6, 2026 · ROAS Lab editorial team. All figures above are illustrative assumptions, not industry benchmarks.

Build your ROAS target from contribution margin

ROAS measures attributed revenue divided by ad spend, but revenue is not profit. Before an advertising dollar can create profit, each order must pay for product cost, fulfillment, payment fees, discounts and expected returns. The amount left before advertising is contribution margin.

Why the simple margin shortcut can mislead

The common shortcut is 1 ÷ contribution margin percentage. It works only when the margin percentage and the ROAS numerator use the same revenue basis. Ad platforms may report gross purchase value while your accounting uses net revenue after discounts and refunds. This calculator keeps both concepts visible so you can document the difference.

Break-even is a floor, not a goal

At break-even, advertising has used all contribution profit. There is nothing left from the order to support fixed payroll, software, rent, growth investment or owner profit. Enter a desired post-ad profit margin to calculate a more useful target ROAS. Read the full target ROAS formula guide before changing bidding targets.

Use one consistent data period

Mixing this month’s revenue with last quarter’s return rate produces a fragile answer. Pull AOV, discounts, refund assumptions and variable costs from a comparable period. For products with delayed returns, use a mature cohort or a documented expected-return allowance. Our calculation methodology explains the assumptions and limits.