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Break-Even ROAS Calculator

The ROAS your gross margin demands before a campaign earns its first unit of profit — and how far above or below it you are now.

✓ Recalculates as you type✓ The formula is printed on the page✓ Your figures never leave the tab

Your margin

Gross margin after cost of goods, payment fees, shipping, and expected returns.

Gross margin%Current ROAS×

Method

The arithmetic

Advertising is paid out of gross profit, not out of revenue. Break-even is therefore the point where gross profit equals ad spend, and rearranging that gives a result with one input: break-even ACOS is the gross margin itself, and break-even ROAS is one hundred divided by it. Your current ROAS is then compared against that threshold to show what each unit of spend is actually returning.

Break-even ROAS = 100 ÷ gross margin% · Break-even ACOS% = gross margin% · profit per unit of spend = ROAS × margin − 1

Worked example

One run through the numbers

At a 40% gross margin the break-even ACOS is 40% and the break-even ROAS is 2.5. Check it by hand: spend 100, take 250 of revenue, and the 40% margin on that revenue is 100 of gross profit — exactly what the ads cost. At a current ROAS of 3.2 the same margin returns 0.28 of gross profit for every 1 spent.

Swap in your own figures — the result recalculates as you type.

Before you act on this

Where this number misleads

Break-even ACOS is the gross margin, unchanged. It is worth committing to memory because it removes a calculation from every budget conversation: a 40% margin means a 40% ACOS ceiling, a 25% margin means 25%, and no arithmetic is needed to check.
Everything that comes out before gross profit belongs in the margin: cost of goods, payment processing, shipping and packaging, and the share of orders you expect back as returns. Leaving returns out is the omission that most often makes a break-even threshold look easier to clear than it is.
Breaking even on the first order is not the only sensible target. A business that knows its repeat rate can knowingly run below break-even to buy a customer, but that decision needs a lifetime figure behind it — which is what the CAC and LTV calculator produces.
This threshold covers the media cost only. Creative production, agency fees, platform subscriptions, and your own time sit outside it, so a campaign landing exactly on break-even ROAS is still losing money overall.
Margins are rarely uniform across a catalogue. A blended break-even ROAS is a planning figure; if some products carry half the margin of others, running one threshold across all of them subsidises the weak lines with the strong ones.

Asked often

Break-Even ROAS Calculator: questions that come up

Why is break-even ACOS the same as gross margin?

Because break-even means gross profit equals ad spend. Gross profit is revenue times margin, so setting spend equal to that and dividing both sides by revenue leaves spend over revenue — which is ACOS — equal to the margin. The two are the same statement written twice.

Should I aim to hit break-even ROAS exactly?

Only if you are deliberately buying volume or a first order you expect to repeat. Landing exactly on it means the campaign paid for its own media and nothing else — not the creative, not the tools, not your time.

What if I do not know my gross margin?

Take one representative order: subtract the cost of the goods, the payment fee, and the shipping you cover from what the customer paid, then divide by what they paid. That gives a workable margin for a single product line, which is more useful than a company-wide figure that averages across very different items.

Does a subscription business break even the same way?

Not on the first payment. Where revenue arrives monthly, the meaningful comparison is acquisition cost against the gross profit of the whole relationship, so break-even shifts to a payback period. The CAC and LTV tool works that version out.

Carry on

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