CPL (Cost Per Lead)
CPL, or cost per lead, is a payout model that pays the affiliate a fixed amount for each qualified lead (a signup, a form fill, an application) rather than for a sale. It is the standard model for lead-generation offers where the conversion happens before any purchase.
CPL (cost per lead) is a payout model that pays a flat amount for each qualified lead the affiliate delivers. A lead is a person who has expressed interest — completed a signup, submitted a form, requested a quote, started an application — but has not yet bought anything. CPL is really CPA where the defined action is a lead rather than a sale, and it powers most lead-generation verticals: insurance, finance, education, home services, B2B.
Why pay for leads, not sales
In many businesses the sale happens off-platform, days or weeks after the lead — a call center closes it, a salesperson follows up, an underwriter approves it. Waiting for the final sale to pay affiliates would make the program slow and opaque. CPL pays on the measurable, immediate step: the lead. The advertiser accepts that not every lead becomes a customer and prices the lead accordingly.
A worked example
You run a CPL offer paying $12 per qualified lead. An affiliate sends 5,000 clicks and drives 300 form submissions, of which 280 pass validation as qualified leads:
- Payout owed = 280 × $12 = $3,360
- The 20 that failed validation (duplicates, junk, out-of-area) are not paid
That validation step is where CPL gets its discipline. Because you pay per lead, a source that floods you with low-quality or duplicate leads costs you real money — so deduplication and lead validation matter more under CPL than under a sale-based model.
Guarding against duplicate leads
The classic CPL risk is the same person submitting twice, or a partner resubmitting old leads. The defense is a dedup rule on a stable identifier — usually email or phone — so one person can never be counted (or paid) twice, even across different transaction IDs.
How this works in LimeliJourney
In LimeliJourney, CPL is a CPA-format contract whose conversion event is a lead — set on the offer's Contracts tab and its advertiser's event catalog, part of managing your partners and offers. When the lead is personal data (an email or phone), send it on a server-to-server postback so it never appears in a URL, and the platform stitches it into a tenant-scoped contact — one person, linked across every conversion they generate. Built-in Email and Phone dedup rules hash those identifiers and block a second lead from the same person on different transaction IDs. If leads need human review before they pay, turn on conversion review so new leads land as Pending until you approve them.