Cost Per Lead (CPL)
Cost Per Lead is the average amount you spend on ads to generate one qualified lead. For example, if you spend $1,000 in a month and get 20 leads, your CPL is $50. This is one of the most important metrics for local service businesses because it shows the actual efficiency of your ad spend — not just how many people clicked, but how many actual business opportunities you're creating.
Why it matters for your business
For a plumber, lawyer, or dentist, knowing your CPL is critical. If you know a typical lead closes at 25% and your average job is worth $500, then a CPL of $50 is profitable ($500 × 25% = $125 in expected revenue per lead, minus $50 cost = $75 profit). If your CPL creeps to $150, you're no longer profitable. Tracking CPL keeps you from wasting money on ads that don't convert.
In practice
A roofing company runs Google ads for a month: $2,500 ad spend, 30 phone calls/leads. CPL = $2,500 ÷ 30 = $83 per lead.
Common questions
What's a good CPL?
It depends entirely on your industry and margins. A plumber with $500+ average jobs might target $40–80 CPL. A legal services firm might accept $150+ CPL if their average case is $5,000+. Calculate your break-even first: (Expected Job Value × Close Rate) should be at least 2–3x your target CPL.
How do I lower my CPL?
Improve targeting (narrow to higher-intent audiences), improve ad copy (speak to your specific customer), improve landing page (make it easy to call or submit), and test continuously. Most CPL improvements come from better targeting and messaging, not just throwing more money at ads.
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