Cost Per Lead Calculator (and Marketing ROI)

Cost per lead (CPL) is what you pay a marketing channel for each inquiry: spend divided by leads. It only means something next to your booking rate. $2,000 that brings 40 leads is a $50 CPL; if 45% book at a $520 ticket and 50% margin, you could pay up to $117 per lead and still break even.

How do you calculate cost per lead?

Divide what you spent on one marketing channel by the number of leads it produced in the same period. A lead is any real inquiry: a phone call, a web form, a text or a marketplace request. Take out spam, wrong numbers, job seekers and duplicates before you divide, or your CPL will look better than it is.

CPL = S ÷ L   ·   Cost per job = S ÷ (L × B)   ·   ROI = (L × B × T × M − S) ÷ S   ·   Break-even CPL = T × M × B

1. 1

   Pick one channel and one month.

   Local Services Ads, Google Ads, a lead marketplace, mailers. Pull the spend from the invoice or the ad account.

2. 2

   Count real leads.

   Use call tracking numbers or your CRM's lead source field. Ask every caller how they found you if you don't have tracking yet.

3. 3

   Count the jobs those leads turned into.

   Paid jobs only, not estimates. For project trades with long sales cycles, use a full quarter.

4. 4

   Enter your ticket and margin.

   Use the average ticket for jobs from that channel if you have it; emergency and replacement leads often run higher.

Which lead source is actually cheapest?

The channel with the cheapest leads is often not the cheapest source of jobs. Shared leads are sold to several contractors, so fewer of them book. The table runs the same calculator on four example channels for the shop above.

The marketplace has the cheapest leads at $30 each, but at a 15% booking rate every job costs $200. The postcards cost $125 a lead and still produce jobs for $250, because people who call from a mailer already chose you. Judge channels on cost per booked job and ROI, not CPL.

What is a good cost per lead for home services?

A good cost per lead is any CPL below your break-even: average ticket × gross margin × booking rate. For outside reference, LocaliQ's 2026 search advertising benchmarks put the average Google Ads cost per lead for the Home & Home Improvement category at $90.92, against $66.69 across all industries, with an average cost per click of $8.33. That category mixes many trades, so your own break-even is a better yardstick than any average.

Local Services Ads work differently from search ads. Google charges for each valid lead rather than each click, and says lead prices vary with your location, the job type, the type of lead and your bidding mode. Leads Google judges invalid or low quality are credited back. Under Google's own rules, a call you miss during your business hours counts as a valid lead if the caller stays on the line for more than 20 seconds, so an unanswered phone can still cost you the lead fee.

Marketing ROI vs. ROAS: which should you use?

Return on ad spend (ROAS) is revenue ÷ spend. Marketing ROI is (gross profit − spend) ÷ spend. ROAS of 4.68x sounds better than an ROI of 134%, but only ROI tells you whether the channel made money after labor and materials. A 2x ROAS at a 40% margin is a loss. Use ROAS to compare campaigns inside one ad account; use ROI to decide where the marketing budget goes.

How to lower your cost per job without cutting ads

1. Answer every lead you pay for. Missed calls from paid channels are pure waste. See the missed call calculator.
2. Respond in minutes. Shared and web leads go to whoever reaches them first. Model it with the speed to lead calculator.
3. Track booking rate by channel and coach the calls that don't book. See the booking rate calculator.
4. Follow up the leads who didn't book. A text the same day and again in a few days wins jobs you already paid for.
5. Check the lifetime value of each channel's customers. A channel with a higher cost per job can still win if its customers come back. See the customer lifetime value calculator.