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Return on Ad Spend (ROAS)

Step-by-Step Guide to Understanding Return on Ad Spend (ROAS)

Last Updated September 29, 2023

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Return on Ad Spend (ROAS)

How to Calculate Return on Ad Spend (ROAS)?

ROAS stands for “return on ad spend” and is a marketing metric that estimates the amount of revenue earned per dollar allocated to advertising.

The reason marketing agencies pay such close attention to ROAS is that it measures the cost-effectiveness of their advertising campaigns and related spending.

Measuring the performance and analytics of an ad campaign is an integral component of a successful business model.

By A/B testing different advertising strategies, companies can figure out which strategy is most profitable and most suitable for their target customer base.

The more effective a company’s advertising message can connect with its target market, the more revenue will be earned from each dollar of ad spend.

That said, the higher a company’s ROAS, the better it is in terms of profitability.

On the other hand, ad campaigns with low ROAS might require adjustments to identify why the market appears less receptive.

To further derive more insights from ROAS, the metric can be calculated on an individual basis across different campaigns, ad platforms, or specific ads.

Return on Ad Spend Formula (ROAS)

The return on ad spend (ROAS) formula is the ratio between the revenue earned from conversions (i.e. sales) related to running advertising campaigns.

In short, the goal of tracking ROAS is to measure the effectiveness of a marketing campaign (and determine if enough revenue is generated to continue the marketing campaign in question).

Return on Ad Spend (ROAS) = Conversion Revenue ÷ Advertising Spend


  • Conversion Revenue → The amount of revenue brought in from the ad campaigns.
  • Advertising Spend → The amount of capital spent on ad campaigns and adjacent activities.

The ad spend can include just the platform fees, as well as minor fees, such as the following:

  • Salary Costs (e.g. In-House or Outsourced 3rd Party Agency)
  • Vendor or Partnership Costs
  • Affiliate Costs (i.e. Commissions)
  • Network Transaction Fees (i.e. % of Transactions Taken by Network)

What is a Good ROAS Ratio?

Before running an ad campaign, the company must determine the minimum threshold for its return on ad spend (ROAS).

The minimum threshold is specific to the company, as all companies have different cost structures and expenses.

Generally, a widely referenced benchmark for an “acceptable” ROAS is a 4:1 ratio.

So, what does the 4:1 ROAS ratio mean?

From the ad spend, the company generates $4 in revenue for each $1 of ad spending.

In an example scenario, this means that if a company invested $20,000 in its ad campaign and generated $80,000 in revenue due to those ad campaigns, the ROAS is 4:1.

  • Return on Ad Spend (ROAS) = $80,000 ÷ $20,000 = 4:1

However, all companies are unique, and the minimum ROAS to be profitable could be as high as 10:1 or as low as 2:1 – so the same criteria cannot be applied to all companies.

ROAS Calculator

We’ll now move to a modeling exercise, which you can access by filling out the form below.


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1. Ad Campaign Assumptions (A/B Testing)

Suppose a company is A/B testing two different ad campaigns targeted at the same market.

For the first ad campaign (A), the conversion revenue generated throughout the year was $2 million.

With regards to the coinciding ad spend, the platform fees were $400k, while the salary and affiliate costs were each $50k.

  • Conversion Revenue = $2mm
  • Platform Fees = $400k
  • Salary Costs = $50k
  • Affiliate Costs = $50k

In contrast, the other ad campaign brought in more revenue at 5 million.

However, the fees incurred were much higher, with the platform fees being $2 million, salary costs of $400k, and affiliate costs of $100k.

  • Conversion Revenue = $5mm
  • Platform Fees = $2mm
  • Salary Costs = $400k
  • Affiliate Costs = $100k

2. ROAS Calculation Example

Therefore, by dividing the conversion revenue by the total ad spend in the corresponding ad campaign, the ROAS can be calculated.

  • ROAS (A) = $2mm / $500k = 4:1
  • ROAS (B) = $5mm / $2.5mm = 2:1

Despite the second ad campaign bringing in more revenue, the first ad campaign (A) appears more efficient at generating revenue with less spending.

3. Return on Ad Spend Analysis Example (ROAS)

Based on our model (A/B testing), the company is likely to consider selecting the first ad campaign as the strategy to scale.

The return on ad spend (ROAS) is 4:1 vs. 2:1 for the first and second ad campaign, respectively.

However, there are many other important factors to consider to analyze a company’s return on ad spend (ROAS).

In particular, the growth in fees and costs must also be considered for scaling the first campaign, since it is possible that costs and conversion revenue do not move proportionally (i.e. linearly).

Return on Ad Spend (ROAS) Calculator

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