Break-even ROAS calculator

What is ROAS?

ROAS, return on ad spend, is the revenue your ads produce for every dollar you spend on them. Spend $20,000 and the platform credits you with $56,000 of sales, and your ROAS is 2.8x: every $1 came back as $2.80 of revenue.

ROAS = revenue from ads ÷ ad spend

It is the first number every ad platform shows you and the one most brands scale, cut or fire an agency on. It is also the one number on the dashboard that says nothing about your business. Revenue is not profit. ROAS does not know what the product cost you, what it cost to ship, or what Shopify and Stripe took on the way through. Two brands can run identical 3x campaigns and one is compounding profit while the other is paying to acquire losses.

So the question is never “what is our ROAS?” but “what does our ROAS have to be?” That number is your break-even ROAS, and it comes from your own margins, not from a benchmark.

Break-even, target, actual and MER

Four numbers, each answering a different question. Here they are worked through on the calculator’s example: a $90 order, $20,000 of ad spend in a month.

Profit per order before ads

Start with what one order leaves after every cost that scales with it: the goods, shipping and packaging, and the percentage the payment provider takes. That is the money available to pay for ads and, after that, to be profit.

Profit before ads = AOV − product cost − shipping − fees

Example$90 − $30 − $12 − $3.15 fees = $44.85 an order, a 49.8% margin before ads.

Break-even ROAS

The return at which the ads pay for themselves and nothing more. If each $90 order leaves $44.85, every dollar of revenue carries about 50 cents of profit, so you need about $2 of revenue to pay back $1 of ad spend.

Break-even ROAS = AOV ÷ profit before ads

Example$90 ÷ $44.85 = 2.01x. Below it the ads lose money on every order, however good they look in the platform.

Target ROAS

Break-even is a floor, not a goal. Decide the margin you want to keep on each ad-driven order, take it out of your margin before ads, and the ROAS that clears what is left is your real target.

Target ROAS = 1 ÷ (margin before ads − target margin)

Example1 ÷ (49.8% − 15%) = 2.87x to keep 15% of every ad-driven order.

Actual ROAS, in dollars

Your platform ROAS is only useful once it is set against the line. Multiply it by your margin before ads and subtract one, and you have what each dollar of spend really returned.

Return per $1 = actual ROAS × margin before ads − 1

Example2.80x × 49.8% − 1 = $0.40 of profit per $1 of ad spend, $7,907 on the month’s $20,000.

MER

Marketing efficiency ratio, sometimes called blended ROAS: all of the store’s revenue over all of its marketing spend, every platform, agency fee and tool included. No attribution window can flatter it.

MER = total store revenue ÷ total marketing spend

Example$140,000 ÷ $32,000 = 4.38x, leaving $37,767 after all marketing at the same margin.

Notice what the platform number hides. A 2.80x ROAS sounds comfortable. Against a 2.01x break-even it is 40 cents of profit on the dollar, and against the 2.87x the 15% target needs it is short. The gap between your break-even and your actual ROAS, in dollars, is the only honest report card for an ad account.

eCommerce ROAS benchmarks for 2026

What online stores’ ad accounts return, by category and by channel, so you can see where yours sits. The category figures are medians across tens of thousands of stores; none of them has been checked against anyone’s margin.

Google’s numbers are higher partly because it catches people already searching to buy, many of them for a brand they already know. Split the channels out and the gap between what a platform reports and what it actually caused opens up:

Brand search, retargeting, Snapchat and Pinterest claim far more sales than they cause; Meta prospecting, YouTube and AppLovin are the only channels that undercount themselves. Benchmark MERs, including the 4.2x above, divide revenue by ad spend alone; add agency fees and tools, as this calculator suggests, and yours will read lower. This is why the calculator asks for your MER as well: when platform ROAS climbs and MER does not, you are paying more to be told the same sales were yours.

And what you need depends only on your margin. At a 50% margin before ads you break even at 2.0x; at 40% it is 2.5x; at 30% it is 3.3x. A health and wellness brand at 1.4x on Meta can be perfectly healthy on a subscription; an electronics brand at 2.9x on Google can be losing money on every order.

How to improve your ROAS

Six levers. The first three lower the ROAS you need; the last three raise the ROAS you get. Try each in the calculator to see what it is worth to you.

1.Fix the order before the ad account

Every dollar off the cost of an order lowers the bar the ads have to clear. In the example, $2 off shipping takes the break-even from 2.01x to 1.92x; 5% off product cost takes it to 1.94x. The profit margin calculator works through every cost on the order.

2.Grow the basket

A bigger order carries the same click, the same shipping and the same fees, so nearly all of the extra is profit and the break-even falls with it. A $5 bigger basket in the example lowers the line from 2.01x to 1.91x. Bundles, a free-shipping threshold just above today’s average and a post-purchase upsell all do it; the AOV calculator prices the lift.

3.Count the second order

Break-even ROAS judges the first order alone. If customers come back, the real line is lower than this page says, because the repeat orders carry no acquisition cost. Check it on the CAC & LTV calculator before deciding what a first order is allowed to cost.

4.Feed the account more creative

On Meta today the creative does most of the targeting. An account with a steady supply of genuinely different concepts holds its ROAS as spend climbs; one recycling the same three ads watches it slide. That is the work of Ad Creatives running beside Paid Advertising.

5.Judge campaigns against your line, not a round number

A 2.3x prospecting campaign that looks poor against an arbitrary 3x goal is profitable at a 2.0x break-even, and switching it off hands those customers to a competitor. A healthy account runs most of its spend between break-even and target, with prospecting lower and retargeting higher.

6.Watch MER alongside platform ROAS

Meta, Google and TikTok each claim credit for sales the others helped create, and all three count sales that would have happened anyway. Total revenue over total marketing spend cannot be gamed. If platform ROAS rises and MER is flat, the attribution moved, not the business.