What is ROAS, and why your target is probably wrong
ROAS — return on ad spend — is one of the most useful numbers in advertising and one of the most misused. Plenty of businesses chase a high ROAS straight into shrinking profits. Let's fix that, starting with what it actually means.
The definition
ROAS is simply revenue generated divided by ad spend. Spend €1,000 and generate €4,000 in sales, and your ROAS is 4 — often written as 4x or 400%. It answers one question: for every euro I put into ads, how many euros of revenue come back?
ROAS = revenue from ads ÷ amount spent on ads. A ROAS of 4 means €4 back for every €1 spent.
Why a "good" ROAS is the wrong thing to ask for
People love to ask what a good ROAS is, but the honest answer is: it depends entirely on your margins. ROAS measures revenue, not profit — and revenue you sell at a loss is still a loss, however impressive the multiple looks.
Consider two businesses, both with a ROAS of 4. The first sells digital products at 90% margin: at 4x they're enormously profitable. The second is a retailer at 20% margin: at 4x they're barely breaking even after product costs, let alone overheads. Same ROAS, wildly different reality.
Find your break-even ROAS
This is the number that actually matters. Your break-even ROAS is roughly 1 divided by your profit margin. At a 25% margin, break-even is about 4 — below that you lose money on ads, above it you make money. At a 50% margin, break-even is about 2. Knowing this single figure transforms ROAS from a vanity metric into a decision tool: you instantly know whether a campaign is actually contributing to profit.
The trap of optimising for maximum ROAS
Here's the counterintuitive part: chasing the highest possible ROAS usually shrinks your business. The easiest way to push ROAS up is to spend only on your warmest, cheapest audiences — typically people already searching for your brand. That looks spectacular on a report but barely grows anything; you're mostly paying to capture sales you'd likely have won anyway.
Scaling means reaching new, colder audiences, which naturally lowers ROAS but increases total profit. A lower ROAS at much higher volume often makes far more money than a glittering ROAS at tiny scale.
ROAS vs profit: chase the right one
The goal of advertising isn't a number on a dashboard — it's profit in the bank. ROAS is a means to that end, useful only when read against your margins and your growth goals. A business obsessed with maximising ROAS often leaves enormous profit on the table by refusing to scale.
Using ROAS well
- Calculate your break-even ROAS from your true margins, including all costs.
- Set targets above break-even — but not so high that you choke growth.
- Feed accurate revenue values into your platforms via solid tracking and analytics, so ROAS reflects reality.
- Judge campaigns on total profit contribution, not ROAS alone.
- Accept a lower ROAS when scaling profitably into new audiences.
Set up and read correctly, ROAS is a powerful compass. Read naively, it quietly steers you away from growth. If you're not sure your targets reflect your real economics, that's exactly the kind of thing we untangle in Google Ads management and Meta Ads management.