ROAS

ROAS, or Return on Ad Spend, is a metric that compares the revenue attributed to advertising with the amount spent on that advertising. It is primarily used to evaluate sales campaigns running through Google Ads, Meta Ads, and other advertising platforms.

ROAS can be used to compare campaigns, ad groups, products, or marketing channels. However, it does not directly measure profit because it considers revenue and ad spend without automatically accounting for product costs, margins, order fulfillment, or agency fees.

How do you calculate ROAS?

ROAS is calculated using the following formula:

ROAS = revenue attributed to advertising / advertising cost

If an online store spends $5,000 on advertising and generates $25,000 in attributed revenue, its ROAS is 5, or 500%. This means that every dollar spent on ads generated $5 in revenue.

The result may be presented as a number, ratio, or percentage:

• ROAS of 5;
• ROAS of 5:1;
• ROAS of 500%.

All three formats can describe the same result.

What is a good ROAS?

There is no single ROAS that is appropriate for every business. The required result depends on factors such as profit margin, operating costs, returns, average order value, and repeat purchases.

If the margin before advertising costs is 40%, the simplified break-even ROAS for covering ad spend alone is approximately 250%. A company with additional costs will need a higher result for the campaign to generate an actual profit.

A 500% ROAS may be an excellent result for a high-margin product but insufficient for a low-margin product with frequent returns. A target should therefore be based on the economics of the individual business rather than a general benchmark.

Want to find out what ROAS you need to cover your campaign costs? Read our guide to calculating ROAS and evaluating ad profitability. It includes a ROAS calculator, worked examples, and an explanation of how your margin affects the break-even point.

What is the difference between ROAS and ROI?

ROAS compares revenue with advertising spend. ROI has a broader scope and measures the return on the overall investment, typically using profit and all relevant costs.

A high ROAS does not necessarily mean a high ROI or profitable sales. A campaign may generate substantial revenue but deliver little profit, or even a loss, after product costs, shipping, returns, discounts, and operational expenses are included.

What is target ROAS?

Target ROAS, also known as tROAS, is the average return an advertiser wants a campaign to achieve. It can be used by automated bidding strategies on platforms such as Google Ads.

The system adjusts bids according to the predicted conversion value. Setting an unrealistically high target may reduce impressions, clicks, and sales because the algorithm will participate more selectively in advertising auctions.

How can ROAS be measured accurately?

Calculating ROAS requires accurate conversion tracking and conversion values. For an online store, the value may be the revenue from an order. A lead generation campaign can use an estimated lead value or connect advertising data with a CRM and actual sales results.

Results reported by different platforms may not match. Google Ads, Meta Ads, and analytics tools can use different attribution models, conversion windows, and rules for assigning sales. The same transaction may be credited to more than one channel.

What are the limitations of ROAS?

ROAS does not automatically account for margins, operating costs, canceled orders, returns, or customer lifetime value. It also cannot fully measure the effect of advertising on brand awareness or later purchases completed through another channel.

The metric should be analyzed alongside profitability, customer acquisition cost, conversion volume, and customer lifetime value. A high ROAS generated from a very small budget does not necessarily mean the campaign can be scaled without reducing its efficiency.