DefinedTerm · Glossary
Customer Acquisition Cost (CAC) in Home Services
Customer Acquisition Cost (CAC) is the total marketing and sales spend divided by the number of new customers won in a given period. In home services — plumbers, HVAC contractors, remodelers, flooring installers — CAC is channel-sensitive: paid local search leads can cost three to five times more than leads from well-ranked organic content. Tracking CAC by channel determines whether growth is profitable or cash-destructive. A healthy CAC is always evaluated against Lifetime Value (LTV).
Full Definition
Customer Acquisition Cost (CAC) measures how much a business spends to bring in one new paying customer. The standard formula sums every dollar attributable to demand generation — digital ads, salesperson salaries allocated to new-client prospecting, CRM subscriptions, estimate-generation software, trade show fees, and vehicle costs for pre-sale site visits — then divides that total by the number of new customers closed during the same measurement window.
In home services, the definition must account for costs that other industries rarely face: fuel and labor for free in-home estimates, proposal design time, the percentage of estimates that never convert, and fees paid to lead marketplaces such as Angi, Thumbtack, or HomeAdvisor. A plumbing company that pays a platform $80 per lead but closes only one in four carries an effective CAC of $320 before any overhead is added. Failing to include pre-sale field costs systematically understates true CAC.
Why It Matters in 2026
Google Ads cost-per-click in home services categories — searches such as "HVAC repair near me" or "emergency plumber" — has risen year over year as local franchises and venture-backed aggregators compete for the same keywords. Businesses relying exclusively on paid search face an upward CAC spiral with no natural ceiling.
Simultaneously, generative AI engines — ChatGPT, Perplexity, Google AI Overviews — now answer service-intent queries directly, intercepting traffic that previously reached contractors through organic search. Businesses without authoritative content and consistent local citations become more dependent on paid channels, which raises CAC further. Understanding CAC by channel enables operators to shift budget toward lower-cost acquisition sources before margins erode.
How It Is Calculated
The base formula is:
CAC = Total acquisition spend / Number of new customers
A more precise channel-level version:
CAC (channel) = Spend attributed to that channel / New customers originating from that channel
Practical steps for a home services business:
- Define the measurement period (month, quarter, or trailing twelve months).
- Sum all costs directly tied to winning new customers: ad spend, portion of salesperson compensation covering new leads, estimate software, platform fees, and pre-sale travel costs.
- Exclude costs related to serving existing customers or retention programs.
- Divide by the count of signed contracts from new customers during that same period.
Difference from Cost Per Lead (CPL)
| Metric | What it measures | When to use it |
|---|---|---|
| Cost Per Lead (CPL) | Cost to generate one interested contact | Optimizing demand-generation campaigns |
| CAC | Cost to convert a lead into a paying customer | Evaluating overall acquisition profitability |
CPL sits upstream of CAC. A low CPL combined with a low close rate can still produce a high CAC. In home services, where the estimate-to-contract cycle may span days or weeks, conflating these two metrics causes operators to overestimate channel efficiency. CAC is the definitive profitability signal; CPL is an early-funnel diagnostic.
Related Terms
Missed call rate, Local Service Ads (LSA), Google Business Profile.
Fuentes
Términos relacionados
- missed-call-rate
- local-service-ads-lsa