What Is a Good Cost per Lead? How to Calculate Your Maximum CPL

Why industry averages are the wrong benchmark

You will find plenty of “average cost per lead by industry” tables online. They are almost useless for decision-making, because two businesses in the same industry can have completely different economics.

A roofing company that mostly replaces whole roofs can afford to pay many times more for a lead than one that mostly patches leaks. A law firm with a 40% consultation-to-client rate can pay double what a firm closing 20% can. The right number is your number, calculated from four inputs you already know or can estimate.

The formula

Breakeven cost per lead = gross profit per customer × close rate

• Gross profit per customer = average revenue per customer minus direct costs (materials, labour, subcontractors, cost of goods). Do not include rent, salaries of office staff or other overhead here.
• Close rate = the share of leads that become paying customers. If 20 of 100 leads buy, your close rate is 20%.

Breakeven is the most you could pay per lead and still cover the direct cost of the job. You make nothing at breakeven, so your target should be lower.

Target cost per lead = breakeven cost per lead × the share of gross profit you are willing to spend on getting the customer.

Step by step: calculate your numbers

Step 1: Find your average job value

Take last year’s revenue from new customers and divide by the number of new customers. If you offer very different services, calculate each separately. A furnace repair and a furnace replacement are different businesses from a lead-cost point of view.

Step 2: Apply your gross margin

Multiply job value by your gross margin percentage. If a $12,000 kitchen renovation costs $7,800 in materials and labour, gross profit is $4,200 (35%).

Step 3: Measure your close rate honestly

Count all leads, including the ones that never answered, not just the quotes you gave. If you do not track this yet, start now with a simple spreadsheet: lead date, source, service, booked yes or no, job value.

Step 4: Decide how much gross profit you will spend

This depends on your overhead and growth goals. A business with high overhead may cap acquisition at 20–30% of gross profit. A business focused on growth, or with strong repeat business, may accept more.

Step 5: Calculate breakeven and target

Breakeven = gross profit × close rate. Target = breakeven × your chosen share.

Worked examples for Canadian businesses

Business	Gross profit per customer	Close rate	Breakeven CPL	Target at 40%
Furnace replacement (Calgary)	$2,500	30%	$750	$300
Family law retainer (Toronto)	$4,000	20%	$800	$320
Dental implant (Vancouver)	$2,000	25%	$500	$200
Roof replacement (Ottawa)	$4,500	22%	$990	$396
Recurring house cleaning (Halifax), first year	$600	35%	$210	$84
Junk removal (Winnipeg)	$220	45%	$99	$40

These are illustrative numbers to show the method, not benchmarks. Plug in your own.

Cost per lead vs. cost per customer

Cost per lead is useful, but cost per customer is what pays the bills. A cheap lead that never buys is expensive.

Track both numbers. When cost per lead looks fine but cost per customer is high, look at lead quality (keywords, landing page messaging) and follow-up (speed, script, quoting).

Should you use lifetime value?

If customers come back, for example dental patients, HVAC maintenance plans, recurring cleaning or lawn care, one job understates what a customer is worth. Using lifetime value lets you pay more for a lead and grow faster than competitors who only count the first job.

Use it carefully:

• Base it on real retention data, not hopes. How many customers from two years ago are still buying?
• Count gross profit, not revenue.
• Use a conservative time frame, such as two or three years.
• Remember that cash flow matters: you pay for the lead today and earn the lifetime value over years.

Using your target in Google Ads

• Set your bidding goal. Once a campaign has steady conversions, a Target CPA near your target cost per lead tells Google what to aim for.
• Give each service its own target. A furnace replacement lead is worth far more than a furnace repair lead. Separate campaigns or conversion values let you bid accordingly.
• Use conversion values. Assigning values to different leads, or importing sale values from your CRM, lets you bid for value rather than just volume.
• Watch the trend, not one week. Cost per lead swings from week to week. Judge on 30-day and 90-day averages.

Checklist: know your numbers

Want help setting realistic targets for your market? Our Google Ads audit includes a cost-per-lead target based on your numbers.