Break-Even ROAS: How to Calculate It (Free Calculator)

A 3.0 ROAS sounds like a win. For some brands it is. For others it means every sale loses money, and the more you spend, the faster you lose it.

The number that tells you which side you're on is your break-even ROAS: the return on ad spend at which an order exactly pays for itself and its ads. Below it, you lose money on every sale. Above it, you make money. It is the most important number in paid advertising, and most founders have never calculated it properly.

This guide covers the formula, a worked example, the costs people forget, and how to turn break-even into a target you can run your ads against. There's a free calculator below.

What is break-even ROAS?

ROAS (return on ad spend) is revenue divided by ad spend. If you spend $1,000 and generate $3,000 in sales, your ROAS is 3.0.

Break-even ROAS is the ROAS where your profit on those sales is exactly zero after paying for the product, getting it to the customer, and paying for the ads. It's not a goal. It's the floor.

The break-even ROAS formula

Your contribution margin is the share of each order you keep after every cost that comes with the sale:

Most guides stop at "1 ÷ profit margin" and use gross margin from the accounts. That's where the trouble starts, because gross margin often leaves out shipping, fees and returns. Those costs are real, they scale with every sale, and they push your break-even higher.

A worked example

Say you sell skincare online with an average order value (AOV) of $60.

Contribution margin = $28.20 ÷ $60 = 47%

Break-even ROAS = 1 ÷ 0.47 = 2.13

So this brand needs at least $2.13 of revenue for every $1 of ad spend just to break even on the order. A campaign at 1.8 ROAS is losing money. A campaign at 2.5 is making a little.

If you only used gross margin ($60 − $15 = 75%), you'd get a break-even of 1.33. You'd think 1.8 was comfortably profitable, and you'd scale a campaign that loses money on every order.

Calculate yours

Break-even ROAS calculator

CurrencyUSDAUDGBPEUR

Average order value$Product cost$Shipping & fulfillment per order$Payment fees%Returns (% of revenue)%Average discount per order$Target profit margin%Average orders per customer in 12 months (optional)

Contribution per order

$28.20

Contribution margin

47.0%

Break-even ROAS

2.13×

Break-even CPA

$28.20

Target ROAS

3.13×

12-month contribution per customer (max CAC)

$50.76

Want ACE to judge every ad against this number? Get started

The costs founders forget

When your numbers don't add up, it's usually one of these:

• Shipping you absorb. Free shipping isn't free. Include the full cost per order, including packaging and pick-and-pack fees from your 3PL.
• Payment fees. Usually 2.5–3.5% plus a fixed fee per transaction. Small, but it's on every order.
• Returns and refunds. Use your actual return rate over the last 3–6 months, including the cost of return shipping if you pay it.
• Discounts and promo codes. Your average order value after discounts is what matters, not your list price.
• Marketplace or app fees that are charged per order (subscriptions, upsell apps, affiliate commission).

Leave out fixed costs like rent, software and salaries. Break-even ROAS answers one question: does this order pay for its own ad cost? Fixed costs belong in the next step.

From break-even to target ROAS

Breaking even keeps you in the game; it doesn't pay the bills. Your target ROAS adds the profit you need to cover overheads and grow:

Using the example above, if you want 15% of revenue left over after ads:

Target ROAS = 1 ÷ (0.47 − 0.15) = 3.13

Now you have two clear lines:

• Below 2.13: losing money. Fix or pause.
• 2.13 to 3.13: profitable on the order, but not hitting your goal. Improve creative, offer or conversion rate before you add budget.
• Above 3.13: hitting target. This is what you scale.

Break-even CPA: the same idea in dollars

If you think in cost per purchase rather than ROAS, your break-even CPA is simply your contribution per order. In the example, that's $28.20. Spend more than that to win an order and you lose money on it.

First order vs. lifetime value

Everything above assumes the first order has to pay for itself. If customers come back, that's too strict.

Say the average customer places 1.8 orders in their first 12 months. Lifetime contribution is $28.20 × 1.8 = $50.76. In theory you could pay up to about $50 to acquire a customer and still break even over the year.

That's powerful, but be careful:

• Use real repeat data, not hope. Pull it from your store, not a benchmark.
• Pick a short window. 6 or 12 months, not "lifetime". Cash spent today has to be funded until those repeat orders arrive.
• Watch your cash. Running ads below first-order break-even is a deliberate investment. Only do it if you can afford the gap.

This is why the ratio of lifetime value to customer acquisition cost (LTV:CAC) matters. A healthy LTV:CAC means you can afford to compete harder for customers than brands that need every first order to be profitable.

Platform ROAS vs. reality

The ROAS that Meta or Google reports is their attribution, not your bank balance. Platforms can over-count (claiming the same sale) or under-count (missing conversions they can't track).

Check your blended numbers alongside platform numbers:

If your MER is above your break-even ROAS, your marketing as a whole is paying for itself. If platform ROAS looks great but MER is below break-even, something is being over-counted.

For service businesses: break-even cost per lead

If you sell services and run lead ads, the same logic gives you a break-even cost per lead:

A cleaning company with a $400 average job, 60% gross margin and a 25% close rate can pay up to $400 × 0.60 × 0.25 = $60 per lead before losing money on the first job. Repeat customers push that ceiling higher.

How to use your break-even every day

1. Calculate it once properly, then update it whenever your prices, costs or shipping change.
2. Judge every campaign, ad set and ad against it, not against a benchmark from someone else's business.
3. Scale only what's above target, and give new ads time to exit the learning phase before you judge them.
4. Review MER monthly to make sure platform numbers match reality.

In AdStrategy AI, you set up your economics once with ACE, our AI marketing agent. It walks you through each number, calculates your break-even and target ROAS, and then judges every ad against your numbers: scale, iterate, fix or watch. See how economics works.

Key takeaways

• Break-even ROAS = 1 ÷ contribution margin, not gross margin.
• Include shipping, payment fees, returns and discounts, or your break-even will be too low.
• Set a target ROAS above break-even to cover overheads and profit.
• If customers repurchase, you can afford a higher acquisition cost, but use real data and a short window.
• Check blended MER against break-even to make sure platform ROAS is telling the truth.