ROAS: what it is, how it's calculated and how to improve your advertising return
How many euros each euro you invest in ads brings back, and how to tell whether you're really making money
**ROAS (Return On Advertising Spend) is a metric that shows how much revenue each euro invested in advertising generates. It is also known as return on ad spend**.
If you spend €1,000 on ads and get €4,000 in sales, the result is 4. For every euro invested, the campaign has generated four.
What does ROAS stand for?
It stands for Return On Advertising Spend. It is used mainly in digital advertising: search ads, social media ads, Google Shopping and programmatic advertising.
It answers a specific question: does this campaign sell enough to justify what it costs?
ROAS formula
ROAS = revenue generated by advertising / advertising spend
The result can be expressed in three ways. They all mean the same thing:
| Form | Example | How to read it |
|---|---|---|
| Number | 4 | Each euro generates €4 in revenue |
| Ratio | 4:1 | €4 in revenue for every euro invested |
| Percentage | 400 % | Revenue is 400% of spend |
How to calculate ROAS: examples
A T-shirt store invests €6,250 in search ads over one month. Sales coming from those ads add up to €15,500. The result is 15,500 / 6,250 = 2.48.
An online academy spends €800 on social media ads and sells 20 courses at €120 each. Revenue: €2,400. 2,400 / 800 = 3.
A cosmetics store compares two campaigns. Campaign A has a return of 5 and campaign B, 2. With the same budget, A generates more than twice as many sales.
For the calculation to be reliable, the revenue must be what the advertising actually brought in. Ad and analytics tools use an attribution model to decide which sale belongs to each campaign.
ROAS vs. ROI: differences
They are often confused, but they don’t measure the same thing.
| ROAS | ROI | |
|---|---|---|
| What it measures | Revenue per euro of advertising | Profit per euro invested |
| Costs it takes into account | Ad spend only | All of them: product, shipping, staff, tools… |
| Formula | Revenue / ad spend | (Profit − investment) / investment |
| What it’s for | Comparing campaigns and ads | Knowing whether the business makes money |
A high ROAS doesn’t guarantee a profit. If your margins are small, a campaign with a return of 3 can make you lose money. That’s why you should also look at ROI.
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What is a good ROAS?
There is no single figure that works for everyone. It depends on your profit margin.
The starting point is your minimum ROAS, or break-even ROAS. It’s the one that keeps you from losing money on advertising:
Minimum ROAS = 1 / profit margin
If you earn 25% on each sale, your minimum ROAS is 1 / 0.25 = 4. Below 4, every sale you get through ads costs you money.
| Profit margin | Minimum ROAS |
|---|---|
| 20 % | 5 |
| 25 % | 4 |
| 40 % | 2,5 |
| 50 % | 2 |
Staying below the minimum can make sense in a campaign to acquire new customers, if you know they will buy again. That’s where customer lifetime value comes in.
How to improve ROAS
1. Refine your targeting. Show your ads to the people most likely to buy.
2. Improve the landing page. A fast, clear landing page with a single call to action turns more visits into sales.
3. Test variations. Compare copy, images and offers, and keep what works best.
4. Increase the order value. Bundles, free shipping above a certain amount or complementary products raise the average order value.
5. Drop what doesn’t sell. Pause the keywords, audiences or ads that don’t reach the minimum.
6. Measure properly. Use UTM parameters and check that conversions are tracked correctly.
7. Win back those who didn’t buy. Many visitors who arrive from an ad don’t buy the first time. If you get their email, you can keep talking to them without paying for the click again.
ROAS and email marketing
Email isn’t pay-per-click advertising, but it has a big influence on the return of your ads:
It turns the click into a contact. A form or a welcome discount on the landing page captures the email of visitors who aren’t ready to buy yet.
It recovers carts. An abandoned cart email closes sales that the ad started.
It brings customers back to buy again. Every repeat purchase that comes through email makes the customer you acquired with advertising more profitable.
It measures its own return. Using the same logic, you can divide the revenue from your email campaigns by what they cost you. It’s a simple way to see the profitability of email marketing.
Common mistakes
Confusing revenue with profit. A return of 3 can be a loss if your margins are low.
Looking only at the short term. A customer who buys once and then ten more times is worth more than the first sale.
Over-attributing sales. If every channel claims the same sale, the total doesn’t match your actual revenue.
Comparing different industries. A return of 2 can be excellent in one business and poor in another.
Forgetting hidden costs. Ad design, agencies and tools are also part of the investment.
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Frequently Asked Questions
These are the most common questions about this metric.
What is ROAS in a nutshell?
The revenue generated by each euro you invest in advertising.
How is ROAS calculated?
Divide the revenue the campaign brought in by what you spent on it.
What is the difference between ROAS and ROI?
ROAS only takes ad spend into account. ROI includes all costs and measures actual profit.
What is a good ROAS?
One that exceeds your break-even minimum, which you calculate by dividing 1 by your profit margin.
Is a return of 1 profitable?
No. It means you recover what you spend on ads, but without covering the cost of the product or your other expenses.