Attribution & Analytics
How to Calculate Break-Even ROAS for Ecommerce
Break-even ROAS tells you the revenue-to-ad-spend ratio at which the order has no contribution left after the costs you choose to include.
A simple starting point uses gross margin.
Basic formula
If gross margin before advertising is 40%, you keep $0.40 from every $1 of revenue before ad cost.
The simple break-even ROAS is:
1 ÷ gross margin
For 40% margin:
1 ÷ 0.40 = 2.5x = 250%.
At 250% ROAS, $100 of ad spend generates $250 revenue. Forty percent of $250 is $100, exactly covering the advertising.
Real businesses have more costs
For a more useful target, account for costs such as:
- payment fees
- fulfilment
- shipping subsidy
- returns/refunds
- discounts
- variable customer service cost
Use contribution margin after those costs rather than headline gross margin.
Break-even is not a growth target
Running permanently at true break-even leaves nothing for overhead or profit unless future customer value justifies it. Most businesses need a target ROAS safely above break-even.
New customer LTV can change the calculation
If customers reliably reorder profitably, you may intentionally accept a lower first-order ROAS. Make that a deliberate customer-acquisition decision, not an excuse for weak campaigns.
Not sure if ROAS is telling the full story?
If you want help setting ROAS targets from your actual margins instead of a generic benchmark, send us an inquiry.