Cost Per Acquisition (CPA): Definition for Contractors
Definition
Cost per acquisition (CPA) measures how much a contractor spends to acquire one paying customer. Unlike cost per lead (CPL), CPA counts the full sales funnel: only prospects who actually become booked, completed jobs are counted. For contractors, CPA and cost per booked job are used interchangeably. CPA is the most accurate measure of marketing efficiency because it ties spend directly to revenue.
How does CPA differ from CPL for contractors?
CPL counts every inquiry, regardless of outcome. CPA counts only the inquiries that became paying jobs. If you generate 30 leads and book 8 jobs, your conversion rate is 27% (8/30). If you spent $2,400 on leads, your CPL is $80 and your CPA is $300 ($2,400 / 8 booked jobs). CPA is the number that determines whether marketing is profitable.
What is the target CPA for contractor marketing?
A practical rule: your CPA should not exceed 10% of your average job value. A plumber with a $1,800 average job should target CPA under $180. An HVAC contractor with a $7,000 average replacement should target CPA under $700. MJM Group clients typically achieve CPA at 3–6% of average job value using exclusive lead systems.
How do I reduce my CPA as a contractor?
Three levers: (1) improve lead quality to raise close rate — exclusive leads close 2–3x better than shared; (2) improve speed-to-contact — calling within 5 minutes vs 2 hours can double booking rate; (3) improve your sales presentation to raise appointment-to-close rate. Reducing CPA is primarily a quality and process optimization, not just a cost reduction exercise.
Frequently asked questions
What is CPA in contractor marketing?
CPA is cost per acquisition — total marketing spend divided by number of jobs booked from that spend. A $3,000 ad spend that books 10 jobs = $300 CPA.
Is CPA the same as cost per booked job?
Yes. For contractors, cost per acquisition and cost per booked job mean the same thing: how much did you spend to get one paying customer.
What is a good CPA for HVAC contractors?
MJM Group benchmark for HVAC exclusive lead systems: $210–$420 CPA. At an average job value of $6,000–$8,500, this represents 3–6% of revenue — a strong marketing ROI.
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