Two fundamentally different types of paid acquisition. Prospecting targets new audiences who haven't engaged with your brand. Retargeting targets people who have. Different CAC, different ROAS, different roles in the growth machine.
The economics gap
- Prospecting: $35–$120 CAC, 1.5–3.5x ROAS, large addressable audience, drives growth
- Retargeting: $12–$40 CAC, 5–15x ROAS (platform-reported), small addressable audience, optimizes conversion
The retargeting trap
Retargeting ROAS looks great because it captures customers who were already going to convert. Cart abandoners, recent product viewers, brand-aware users — they're high-intent already. Platform-reported retargeting ROAS of 12x often translates to 2-3x true incremental ROAS. Scaling retargeting feels like easy money; in reality you cap at the audience size and waste spend on customers who would have converted anyway.
Budget allocation
- Growth-stage brand: 70-85% prospecting, 15-30% retargeting
- Maintenance / mature: 50-65% prospecting, 35-50% retargeting
- Pure-defense holding share: 40-50% prospecting, 50-60% retargeting
The most common mistake
Scaling retargeting because its ROAS looks healthy. You can't grow a business on retargeting — the addressable audience is bounded by your existing site traffic. Prospecting feeds retargeting. Without prospecting investment, the retargeting machine slowly starves.
Frequently Asked Questions
Prospecting vs retargeting?
Prospecting = cold audiences. Retargeting = warm audiences who have engaged.
Why is retargeting ROAS so high?
Captures customers who were converting anyway. True incremental ROAS often 1.5-3x.
What's the right split?
70-85% prospecting for growth; 50-65% for maintenance.
Related Terms
- Brand vs non-brand search
- What is incrementality?
- What is CAC?
- What is ROAS?
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