Return on ad spend (ROAS)
In short
Return on ad spend (ROAS) is the revenue generated for each unit of currency spent on advertising. The formula is ad-attributed revenue divided by ad spend. A ROAS of 4 means four dollars of revenue for every dollar spent.
ROAS measures revenue, not profit. It does not account for product costs, sales costs, or customer lifetime, so it works best as a quick efficiency check alongside other metrics.
How to calculate ROAS
The formula is simple: ROAS = revenue from ads / cost of ads. Say a team spends 10,000 on ads in a quarter and closed deals tied to those ads total 40,000. ROAS is 4.0, often written as 4:1 or 400%.
ROAS in B2B
- Long cycles: Deals close months after the ad was seen, so measure over a matching window.
- Attribution: Many touches contribute, so decide a consistent attribution rule.
- Pipeline view: Early on, track pipeline created per dollar spent while revenue is pending.
- Deal size: Use closed-won value, not leads, to avoid inflating results.
ROAS vs. related metrics
- ROI: Includes all costs and gives profit relative to investment.
- CAC: Cost to win one customer, including more than ad spend.
- Cost per lead: Spend per lead, with no view of revenue quality.
How to improve ROAS
- Tighten targeting: Focus on accounts that fit your ICP.
- Cut weak campaigns: Move budget from low performers to proven ones.
- Improve the landing page: Higher conversion lifts ROAS without more spend.
- Align with sales: Faster follow-up helps leads become revenue.
Common mistakes
- Treating ROAS as profit: A high ROAS can still lose money after costs.
- Short windows: Cutting campaigns before B2B deals close understates results.
- Last-click only: It ignores earlier touches that built demand.
Return on ad spend FAQs
What is return on ad spend (ROAS)?
Return on ad spend is the revenue generated for each unit of currency spent on advertising. It is calculated by dividing revenue attributed to ads by the cost of those ads. A ROAS of 3 means three units of revenue per unit spent.
How do you calculate ROAS?
Divide the revenue attributed to your ad campaigns by the amount spent on them. For example, 40,000 in attributed revenue from 10,000 in spend gives a ROAS of 4, often written as 4:1 or 400 percent.
What is the difference between ROAS and ROI?
ROAS compares revenue to ad spend only. ROI compares profit to total investment, including costs such as staff, tools, and product. ROAS is a quick efficiency check, while ROI shows whether you actually made money.
What is a good ROAS?
It depends on your margins, sales costs, and customer lifetime value. A ROAS that covers all costs and leaves profit is good for you. Set a target from your own break-even point rather than copying a general number.
