ROAS (Return on Ad Spend)
Also known as: Return on Ad Spend
Revenue generated for every dollar spent on advertising.
ROAS is the most-quoted number in performance marketing — and one of the most abused. It's simple to compute, easy to compare, and easy to game. The teams that use it well pair it with CAC, POAS, and unit-economics context.
Definition
ROAS is revenue attributed to ads divided by ad spend, expressed as a multiple — the north-star metric for most performance teams.
Why it matters
ROAS is the single number most teams use to green-light or kill spend. But it lies without contribution margin — a 3× ROAS at 20% margin is a loss.
Formula
ROAS = Attributed Revenue ÷ Ad Spend
| Contribution margin | Break-even ROAS | Healthy target | |
|---|---|---|---|
| 30% | 3.33× | ≥4.5× | |
| 40% | 2.50× | ≥3.5× | |
| 50% | 2.00× | ≥2.8× | |
| 60% | 1.67× | ≥2.3× | |
| 70% | 1.43× | ≥2.0× |
Break-even ROAS = 1 ÷ contribution margin. Healthy target adds a buffer for fixed cost + LTV.
Break-even ROAS is a margin equation
Break-even ROAS is 1 ÷ contribution margin. At 40% contribution margin, break-even is 2.5×. At 60%, it's 1.67×. Every campaign target should start from that number and add a buffer for fixed costs and LTV considerations.
Why ROAS lies
ROAS uses attribution — usually last-click or 7-day view-through — which the platform controls. Two truths coexist: your Meta account may report 4.0× ROAS while MER shows 2.6×. Neither is 'wrong'; they measure different things. Report platform ROAS to campaigns and MER/POAS to leadership.
Raising ROAS without raising CAC
The three levers: better creative (higher CTR → lower CPC), better landing page (higher CVR), or higher AOV via bundles and cross-sells. All three lift ROAS without touching bid.
$5,000 spend generating $17,500 in revenue = 3.5× ROAS.
Common mistakes
- ✕Confusing ROAS with profit.
- ✕Ignoring the attribution window that produced it.
- ✕Chasing high ROAS by shrinking to only bottom-funnel audiences.