What is break-even ROAS?
ROAS, return on ad spend, is the revenue your ads are credited with divided by what you spent on them. Break-even ROAS is the ROAS at which your advertising has used up all the money an order leaves after its other costs, so the order ends with zero profit. Above it, advertising pays for itself; below it, every ad-driven order loses money.
It is not the same as profit margin, and it is not 1.0x. A sale of $45.00 that costs $26.85 to fulfil before any advertising leaves only $18.15 to spend on ads, so it needs more than one dollar of revenue per dollar of ads to break even.
How to calculate break-even ROAS
- Work out the customer payment for one order: the item price after discount plus any shipping you charge.
- Add up every cost of that order except advertising: product, the shipping you pay, packaging, platform and payment fees, and any extra per-order costs.
- Subtract the costs from the customer payment. What is left is the contribution before advertising.
- Divide the customer payment by the contribution. The result is your break-even ROAS.
Break-even ROAS formula
Contribution before advertising = customer payment − costs before advertising
Break-even ROAS = customer payment ÷ contribution before advertising
Maximum break-even CPA = contribution before advertising
Percentage fees are part of the costs before advertising, and they are calculated on the amount each fee applies to: the item price only or the total the customer pays. If the contribution is zero or negative, no amount of advertising can break even and the calculator says so instead of showing a number.
Worked example
A product sells for $40.00 and the customer pays $5.00 for shipping, so the customer payment is $45.00. The product costs $14.00, shipping costs $6.50 and packaging $0.80. The example fees are 8% + $0.30 for the platform and 3% + $0.30 for payments, both on the total customer payment. These rates are illustrative only.
| Customer payment | $45.00 |
|---|---|
| Costs before advertising | − $26.85 |
| Contribution before advertising (maximum break-even CPA) | $18.15 |
| Contribution margin before advertising | 40.33% |
| Break-even ROAS ($45.00 ÷ $18.15) | 2.48x |
Spending up to $18.15 per order on ads leaves this order with zero profit. At that spend, each order brings in $45.00, which is 2.48x of the ad spend.
Break-even ROAS vs actual ROAS
Break-even ROAS is a target built from your costs. Actual ROAS is what your campaign delivered: ad-attributed revenue divided by ad spend. Suppose a campaign spent $1,000.00 and your ad platform credited it with $2,700.00 from 60 orders. Actual ROAS is 2.70x, which is 0.22x above the break-even 2.48x.
The orders agree: the actual cost per order is $16.67, below the maximum $18.15, and the average order is $45.00, the same as the order we modeled. That match is what makes the comparison meaningful. If your real orders are much larger or smaller than the one you model, the ROAS and CPA comparisons can point in different directions, and the calculator warns you.
How product costs affect ROAS
The thinner the margin on a product, the higher the ROAS you need. Raising the product cost in the example from $14.00 to $20.00 cuts the contribution to $12.15 and lifts the break-even ROAS from 2.48x to 3.70x. A discount works the same way: a 10% discount in the example lifts it to 2.81x, because the customer pays less while most costs stay the same.
Why platform and payment fees matter
Fees are taken from every sale before advertising, so they raise break-even ROAS. In the example, a 15% platform fee instead of 8% moves it from 2.48x to 3.00x. Which amount the fee applies to also matters: if the platform charges its percentage on the item price only instead of the total payment, the break-even ROAS is 2.43x. Check your own fee terms; the defaults in the calculator are examples, not any platform's real fees.
Maximum CPA explained
CPA, cost per acquisition, is how much you spend on ads for each order. The maximum break-even CPA is the contribution before advertising: $18.15 in the example. It expresses the same limit as break-even ROAS in money per order instead of a ratio, which is often easier to compare with a number in your ad account. A CPA below the maximum leaves profit; above it, the order loses money.
Common ROAS calculation mistakes
- Treating 1.0x as break-even, which ignores product cost, shipping and fees.
- Counting advertising twice: once as a cost on the order and again when comparing ROAS.
- Mixing total store revenue with ad-attributed revenue, or using different time periods for spend and revenue.
- Forgetting that a discount lowers the customer payment and raises the ROAS you need.
- Using margin before fees, or fees calculated on the wrong amount.
- Confusing ROAS with profit margin or ROI. ROAS compares revenue with ad spend and says nothing about profit by itself.
- Comparing against an order that does not look like the orders your ads actually produce.
To see the profit per order or work out the price for a target margin, use the E-commerce Profit Calculator or the Selling Price Calculator.
Frequently asked questions
Is break-even ROAS the same as 1.0x?
No. A ROAS of 1.0x means every dollar of ads brought back one dollar of revenue, but revenue is not profit. Product cost, shipping, packaging and fees come out of each sale first, so the break-even ROAS is always above 1.0x whenever an order has any cost before advertising.
Does break-even ROAS tell me my profit?
It tells you where profit from advertising is zero. Above it, ads cost less than the contribution your orders earn before advertising; below it, they cost more. The calculator does not show total profit, because ROAS alone does not say how many orders, or which mix of orders, produced your revenue.
What revenue should I use for ad-attributed revenue?
Use the figure your ad platform reports for the same period as your ad spend. Platforms measure attribution in their own ways, so it may differ from your store's total sales. Never mix it with total store revenue: the comparison only makes sense when spend and revenue describe the same ads.
Why does the calculator ask for a selling price and costs?
Break-even ROAS depends on how much of each sale is left after costs and fees. A product with a thin margin needs a much higher ROAS than a product with a thick one. The calculator models one typical order and works out how much advertising that order can pay for.
What if my orders are not all like the one I entered?
Then the comparison is only approximate. Enter the number of ad-attributed orders and the calculator shows your average order value next to the order you modeled, so you can see how far apart they are. If they differ a lot, update the selling price, shipping and costs to describe a typical attributed order.
What is maximum break-even CPA?
It is the most you can spend on ads to win one order without losing money on it: the contribution before advertising. If your actual cost per order is above it, each order loses money after advertising, assuming it matches the order you entered.
Why is there no advertising cost field in the order section?
Because advertising is the answer, not an input. If advertising were also deducted as a cost, it would be counted twice. Enter your real campaign figures in the ad results section instead to compare actual ROAS with break-even.
Are taxes, currency conversion or returns included?
No. All amounts are before sales tax, VAT and GST, and no exchange rates or income tax are applied; choosing a currency only changes the symbol. Add returns or other per-order costs as additional costs if you want them reflected.