It is not a religious debate, it is a cash-flow decision. Here is the framework we use with clients before allocating budget.
Ads buy speed. SEO buys margin.
Paid search delivers qualified traffic in days but stops the moment spending stops. SEO takes three to six months to compound but keeps producing pipeline at falling marginal cost.
A practical split
- Pre-product-market fit: 80% ads, 20% SEO foundations
- Growing with proven demand: 50/50
- Established brand with healthy margin: 30% ads, 70% SEO, content and AI visibility
The blended metric that matters
Track blended CAC and contribution margin across both channels together. Attribution wars waste more money than either channel ever does.