What is ROAS (Return on Ad Spend)?
ROAS stands for Return on Ad Spend and is a metric that shows how effectively your ads generate revenue relative to the money you spend on them. You can think of ROAS as a direct answer to the question: “How many kroner do I get back for every krone I spend on advertising?” When you measure ROAS, you get a number that allows you to compare campaigns across channels and formats—whether you’re working with Google Ads, social media, or programmatic advertising.
A high ROAS figure means that your campaigns generate more revenue per advertising krone. But it’s not just a number that shows profit. It’s a strategic tool because it reveals which ads create real business value and which ones simply cost money without providing any return. When you combine ROAS with metrics like CPC (Cost Per Click) or CPA (Cost Per Acquisition), you get a clear picture of how your overall marketing efforts are performing.
How do you use ROAS?
You use ROAS to measure the effectiveness of your ad budgets and make decisions about where to invest the most. The basic formula is simple: you divide your ad revenue by your ad spend. The result shows how many times you’ve recouped your investment. For example, a ROAS of 4:1 means that you earn four kroner in revenue for every krone you spend on ads.
The formula looks like this:
When you work with ads on search engines or social media—for example, through targeting in Google Ads or paid social—ROAS is a key metric. It helps you understand whether your creative efforts, ad format, and message are actually converting into sales or leads. You can use ROAS as a management tool to continuously adjust your campaigns so that you maximize the return on every advertising dollar.
Why is ROAS important?
ROAS is important because it directly links your ad spend to your company’s revenue. This gives you a clear indicator of whether your advertising is profitable. Without a solid understanding of ROAS, you risk spending your budget on campaigns that drive traffic but don’t contribute to revenue. In other words, ROAS helps you prioritize the channels and messages that actually create value.
If you work in performance marketing, ROAS serves as a benchmark for determining whether campaigns are performing above or below expectations. It also plays a central role in strategic planning, because ROAS data allows you to adjust budgets, select target audiences, and optimize bidding strategies. In practice, this means that both creative decisions and the technical setup of campaigns are informed by data—not gut feelings.
What types and varieties are available?
There are different ways to use and interpret ROAS depending on your business type and margins. You can calculate your break-even ROAS, which shows the point at which your ad revenue covers your costs without generating a profit. This helps you understand where your limit lies—that is, when a campaign starts to eat into your profits.
Example of calculating break-even ROAS:
For example, if your average profit margin is 40%, you’ll need an ROAS of 250% to cover your expenses. That’s why it’s crucial to know your margins before assessing whether an ROAS figure is “good.” For some industries, the average is around 400%, while others—especially those with high operating costs—require a much higher level to be profitable.
How do you work with ROAS in practice?
In practice, working with ROAS involves collecting and analyzing data from your advertising platforms. This could be from Google Ads, where you can use the Target ROAS bidding strategy to automatically optimize campaigns toward a desired return on ad spend. It could also be through social media, where you manually evaluate ad formats and target audiences to improve ROAS over time.
It’s a good idea to combine ROAS with other KPIs such as CPM, CPC, and conversion rate, because each one provides insight into different stages of the customer journey. This way, you not only gain insight into how much you’re earning from ads, but also why your campaigns are performing the way they do. You can then use that knowledge to optimize your ad setup, landing pages, and the creative aspects of your messaging.
If you also work with SEO or content marketing, ROAS can help you see the direct correlation between paid and organic performance. For example, when you have a high ROAS on a product campaign, you can use that insight to create more targeted organic content around the same products, thereby creating a synergistic effect between the channels.
What should you keep in mind?
When analyzing ROAS, keep in mind that this figure only reflects the return on ad spend—not the full financial picture. You should therefore include other costs, such as production expenses, shipping, and time spent, when assessing whether a campaign is actually profitable. ROAS can quickly appear high if you look at ad costs in isolation, but lower when you consider the entire value chain.
In addition, it’s important to compare ROAS consistently across different periods and campaigns. Seasonal fluctuations, campaign types, and pricing strategies can significantly affect the numbers. By tracking trends over time—rather than focusing solely on isolated results—you’ll gain a more accurate picture of your marketing effectiveness. This allows you to use your data as a real decision-making tool when choosing whether to scale up, adjust, or change direction in your digital marketing efforts.
