Maximum affordable cost per lead
Affordable CPL follows from affordable CAC and lead-to-sale conversion; it is not a separate market price.
Affordable CPL = affordable CAC × lead-to-sale conversion. If 20 of 100 leads buy, you can spend at most 20% of the affordable customer cost on each lead.
What to consider
- Measure lead-to-sale conversion over a comparable period and audience.
- The same CPL can be profitable at a high conversion rate and unprofitable at a low one.
- Set target CPL below the maximum, leaving the same margin of safety as for target CAC.
What stays the same across scenarios
- Sale economics (order value, variable costs and taxes) are shared with the CAC calculation.
- Only one funnel step changes: lead-to-sale conversion.
What changes or is assumed
- Lead-to-sale conversion is your estimate or channel result; no industry average is substituted.
- Leads must be comparable; do not mix different definitions of an inquiry.
Calculation steps
- Calculate maximum CAC from contribution and the allowed margin share.
- Multiply it by lead-to-sale conversion.
- Compare the resulting CPL with your observed cost.
Build the calculation in a calculator
The example also carries: Taxes and fees: 0 (currency); Purchases per customer: 1 (count); Calculation horizon: first purchase (first purchase / full horizon); Contribution share for acquisition: 30 (%).
Illustrative example: Open the example: lead-to-sale conversion of 20%
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Editorial team: MARKMA Editorial Team. Reviewed: .