The most-watched advertising efficiency metric. ROAS tells you how much revenue each dollar of ad spend produced - easy to calculate, easy to compare across campaigns, easy to misinterpret if you don't know what it's really measuring.
Definition
ROAS (Return on Ad Spend) - revenue generated per dollar of advertising spend. Quoted as a ratio (4:1) or multiple (4x). Measures advertising efficiency at the revenue level, not the profit level.
Formula
ROAS = Revenue from ads ÷ Ad spend Break-Even ROAS = 1 ÷ Gross Margin
Common uses
- Campaign comparison - which channels and creatives produce more revenue per dollar
- Bid management - target ROAS thresholds drive automated bidding strategies
- Budget allocation - shifting spend toward higher-ROAS channels
Watch out
ROAS isn't the same as profitable advertising. A 3x ROAS on a 25% gross margin business is break-even at best. Always check against your break-even ROAS (1 ÷ gross margin).