A $20 form lead, a $90 booked appointment and a $180 live transfer are not comparable products until you know what each represents. A live transfer might produce a direct qualified conversation. A booked call might not be attended. An inexpensive form may become an excellent customer after several follow-ups. Price alone cannot tell you which is best.
Use the same endpoint for all three
Define the outcome first: for example, signed customers with a verified initial payment or closed contract. Then compare lead types over comparable time windows, including contact, qualification, attendance, close and applicable compliance costs.
Consider a hypothetical fixed $9,000 budget split into three $3,000 tests:
| Metric | Forms | Booked calls | Live transfers |
|---|---|---|---|
| Input unit cost | $30 | $100 | $150 |
| Units delivered | 100 | 30 | 20 |
| Meaningful qualified conversations | 18 | 18 | 16 |
| Customers closed | 3 | 5 | 4 |
| Marketing cost per customer | $1,000 | $600 | $750 |
The booked-call option wins this example, even though it appears five times more expensive than a form. But if its true attendance or close rate changes, the result changes. The numbers are a teaching model, not verified vendor benchmarks.
Four hidden costs to include
Sales labor: 100 form leads can consume substantially more follow-up effort than 20 transfers. Log representative time, not assumptions.
Duplication: the same person may submit multiple sources. Deduplicate before reporting unique opportunities and calculating cost per customer.
Lead age: a transfer now and a form submission contacted tomorrow have different timing. Track source-specific time to live conversation.
Buyer suitability: a connected caller may still fail minimum project, geographic, financial or service criteria. Qualification must be based on legitimate and lawful criteria, not merely 'someone picked up.'
What to demand from an external lead vendor
Ask for the exact acceptance definition: unique contact, valid number, connection duration, specific buyer consent, geographic eligibility, replacement policy, time lag and source documentation. Do not confuse consent to be contacted with proof that the person can legally buy or obtain the service. Maintain an auditable rejection and replacement process.
For sensitive sectors such as healthcare, retirement advice and housing, require jurisdiction-specific compliance review before buying or transferring leads. Do not transmit protected health or financial information casually between systems.
Use outcome feedback, not vendor claims
Google's qualified/converted lead framework distinguishes earlier inquiry stages from offline progression 1. A CRM that tracks source, contact status, opportunity, attended meeting and paid sale makes the comparison possible. Without it, sales teams are often asked to scale whichever vendor advertises the most attractive CPL.
Use the Lead-Format Economics Calculator: enter all stages, sales labor and customer value by format, then compare the cost of an actual closed customer, not the sticker price of a lead. See the calculator below.
Run the numbers for your store
The values below are an example. Replace them with your own. Nothing you type leaves your browser, no sign-up is needed, and taxes are excluded.
Sources
- Google Ads, Qualified and converted lead goals support.google.com
- Google Ads, Prevent invalid leads support.google.com
Nenad Vasic
Founder and CEO of Fenix Network Media. His work focuses on the economics behind customer acquisition, conversion, measurement and profitable growth. Calculations in this article are original; third-party figures belong to their publishers and are credited in the sources.
Compare cost per closed customer
Use your own numbers, then bring the result to a conversation if you want a second set of eyes on the plan.
