Break-even ROAS is the return on ad spend at which advertising exactly pays for itself. Above it, another sale adds profit. Below it, another sale costs you money — faster, the more of them you make.
It is the only ROAS threshold that means anything, because it is the only one computed from your business rather than from somebody's benchmark blog post.
The formula
Break-even ROAS = 1 ÷ gross margin
Where gross margin is the share of revenue left after the cost of delivering the thing you sold: product cost, shipping, payment fees, and any per-order cost that scales with volume.
Two rearrangements of the same idea, in case your numbers arrive in a different shape:
Gross margin = (average order value − cost of goods per order) ÷ average order value
Break-even ROAS = average order value ÷ gross profit per order
A worked example
A shop sells a $80 item. Product cost is $30, shipping and packaging $8, payment processing $2.60. That is $40.60 of cost per order.
- Gross profit per order: 80 − 40.60 = $39.40
- Gross margin: 39.40 ÷ 80 = 0.4925
- Break-even ROAS: 1 ÷ 0.4925 = 2.03x
So a 2.03x return is break-even, a 3x return is genuinely profitable, and the 4x the industry chat considers table stakes is an excellent month.
Now change one number. If product cost were $55 instead of $30, gross margin falls to 18% and break-even ROAS jumps to 5.5x. Same category, same ad account, same 4x return — and one business is thriving on it while the other is losing money on every order.
This is why a ROAS benchmark taken from somebody else is worse than no benchmark. It is a fact about their margins.
Where fixed costs come in
The formula above covers per-order costs. It does not cover rent, salaries, software or the agency retainer. Those do not change how profitable the next sale is, but they do change how many sales you need.
Two useful variants:
- Contribution break-even is the formula above: the point where an extra sale stops losing money. Use it for ad-level decisions.
- Full break-even adds fixed costs into the denominator over a period. Use it to answer whether the whole operation washes its face this month.
Keep them separate. Loading fixed costs into a per-ad decision makes you kill campaigns that were contributing.
Three mistakes to avoid
Using revenue instead of gross profit. Platform ROAS is revenue over spend. Your break-even line is computed from profit. Compare the two by putting break-even ROAS next to platform ROAS — not by changing what ROAS means.
Forgetting returns. If one order in ten comes back, your effective margin is lower than the arithmetic above. Fold the return rate into cost of goods before you compute.
Ignoring repeat purchases. If a customer typically buys three times, judging the first order alone sets your ceiling far too low. The disciplined version is to compute break-even on the first order for cash-flow safety, and track lifetime value separately for how hard you are willing to push.
Do the arithmetic
The break-even ROAS calculator takes average order value, cost of goods and fixed monthly costs and prints the line. It runs entirely in your browser, takes no account and stores nothing.
Then use it. Write the number somewhere everyone on the account can see. Most bad ad decisions are made by people who do not know it.