What break-even ROAS actually means
Break-even ROAS is the return on ad spend where you stop losing money and start covering costs. Below it, every sale costs you money. Above it, each sale contributes profit.
The formula is simple:
Break-even ROAS = 1 ÷ contribution margin
Your contribution margin is what's left from an order after the costs that scale with each sale: product cost, shipping and fulfilment, payment processing, and anything else charged per order. If 40% of each order is left after those, your break-even ROAS is 1 ÷ 0.40 = 2.5x. At exactly 2.5x you're square. At 2.0x you're paying for the privilege of selling.
Why "is 3x ROAS good?" is an unanswerable question
It depends on the margin. A brand with a 70% margin breaks even at about 1.43x, so 3x is comfortable. A brand with a 25% margin breaks even at 4x, so the same 3x is losing money on every order. That's why comparing your ROAS to someone else's on a podcast tells you nothing useful.
This is the first number I work out on any new account, before touching a campaign. Without it there's no way to know which ads are actually winning, only which ones look good.
Pool rule 001The data decides. Not the HiPPO.
Break-even ROAS vs break-even CPA
They're the same fact in two units. ROAS is a ratio of revenue to ad spend; CPA is the cash you can pay to acquire one order. Break-even CPA is simply your contribution margin in dollars: if an order leaves you $32 after variable costs, $32 is the most you can pay to win it.
I use CPA when talking about budgets and kill rules, because it's easier to reason about. "Stop the ad if it passes $32 with nothing to show" is a clearer instruction than a ratio. That's the thinking behind my Meta kill rules.
Where this calculation goes wrong
- Forgetting discounts and returns. If you discount often or take returns, your real average order value is lower than your list price suggests. Use what you actually collect and keep.
- Mixing in fixed costs. Salaries, rent and software don't belong here. This measures whether one more order is worth buying, not whether the business is profitable overall.
- Using platform ROAS as truth. Meta and Google both count conversions generously. Check their numbers against actual revenue before trusting the ratio.
- Ignoring repeat purchases. If customers reliably buy again, you can afford to pay more for the first order. Only do this with real repeat-purchase data, not optimism.
What about MER, or blended ROAS?
The number above is a per-order calculation. Many brands also watch MER (total revenue divided by total ad spend across every channel), which is harder to fool because it can't be inflated by double-counted conversions. Break-even MER works the same way: 1 ÷ contribution margin, measured across the whole account instead of one campaign.
Does this work for lead generation?
Not directly, because there's no order value on a lead. Convert to lead economics instead: multiply the value of a closed customer by your close rate to get what a lead is worth, then treat that as your ceiling. A $2,000 job closing at 20% makes a lead worth $400, so your cost per lead has to stay well under that. For service businesses the bigger lever is usually follow-up speed, which I covered in the speed-to-lead piece.
Quick answers
What is a good ROAS? Anything comfortably above your break-even. There is no universal number, which is also why Facebook ad costs vary so much between brands.
Is 2x ROAS good? Only if your contribution margin is above 50%. Otherwise you're losing money at 2x.
What's a good break-even ROAS? Lower is better, because it means fatter margins. It's an output of your economics, not a goal to chase.
Should I target break-even? Only deliberately, for example when acquiring customers you know will buy again. Otherwise target the margin you actually need.