Free tool
Cost Per Lead Calculator
A CPL on its own says nothing. What counts is what it becomes once it passes through your close rate.
Cost per lead (CPL) is the amount spent to obtain one qualified contact. You get it by dividing budget by leads generated. Divided by the rate at which leads become customers, it gives the real acquisition cost of a customer.
Your leads, in signed customers
From lead to customer
CPL = Budget ÷ Leads Cost per customer = CPL ÷ Close rate
3,000 € for 150 leads gives a CPL of 20 €. At a 20 % close rate it takes five leads for one customer, so the real cost climbs to 100 €.
This is where most bad lead generation decisions are made. A campaign at 12 € CPL closing at 5 % costs 240 € per customer; one at 30 € closing at 25 % costs 120 €. The cheaper one per lead is twice as expensive per customer, and only the second number pays the bills.
⚠️ It follows that optimising an account on CPL pushes mechanically toward the broadest audiences, the ones that fill in a form most easily and sign least. CPL is a steering metric, never a target.
What makes the calculation reliable
- The close rate comes from the CRM, not from an estimate. It is the variable that swings the result by a factor of two.
- Sales cycle shifts the measurement. This month’s leads sign next month: comparing January budget to January customers distorts everything on a long cycle.
- Unqualified leads count in the budget, never in the customers. Removing them from the numerator flatters CPL without changing a euro spent.
Frequently asked questions
How do you calculate cost per lead?
Divide budget spent by leads generated over the same period. For 3,000 € and 150 leads: 3,000 ÷ 150 = 20 € per lead.
CPL or CPA, which one should I follow?
Both, in that order. CPL says whether the media is efficient, cost per customer says whether the business is profitable. A campaign is judged on the second and optimised on the first.
How do you lower cost per customer without touching budget?
By working the close rate rather than the CPL. Going from 20 % to 25 % drops cost per customer from 100 € to 80 €, without changing a line in the campaigns.
Leads arriving but not signing?
That is almost always a targeting or promise problem, and it shows up in search terms and audiences long before it shows up in the CRM.
Attract Leads Who Sign
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