How Much Can I Afford to Spend to Get One New Customer?

By Bill Stilwell · Last reviewed October 16, 2026

The short answer

Your maximum customer acquisition cost is the most you can spend on marketing to win one paying customer and still make the profit you need. Start with the profit from a typical first job, add the profit from repeat work you can count on, then decide how much of that you’re willing to spend. Work backward from there to the most you can pay per lead.

What this means

The outline asks you to determine the highest acceptable cost to acquire a paying customer.

Two terms matter:

Cost per lead: what you pay for each call, form, or message.
Cost per customer: what you pay for each person who actually buys. If you close 1 in 4 leads, each customer costs 4 times your cost per lead.

To set your maximum:

Find the profit from a typical first job: price minus job costs (see 7.8.11 Break-Even Point).
Add the profit from repeat jobs you can count on (see 7.6.4 Customer Urgency, Value, and Expectations).
Decide what share of that total you’re willing to spend to win the customer. The rest is your profit.

Example: a pest control company earns $90 profit on a first visit. Most new customers sign up for a quarterly plan that brings in about $240 profit over the first year. Total first-year profit is about $330. The owner is willing to spend up to a third of that, so the maximum cost per customer is about $110. The company closes about half its leads, so it can pay up to about $55 per lead.

Why it matters

Marketing can lose money fast. Without a limit, you can buy leads that cost more than they earn.
It lets you compare channels. Ads, lead services, mailers, and sponsorships can all be judged against one number.
It shows the value of free channels. A strong Google Business Profile, website, and reviews can bring in customers at a much lower cost.
It sets your stop rule. When a source costs more than your max, you cut it (see 20.11 Ad Budget and Stop Rule).

Who this applies to

Every business that plans to pay for marketing. Even businesses that rely on referrals should know the number before they try their first ad.

How to do it

Write down profit from a typical first job.
Estimate repeat profit you can reasonably expect in the first year. Be cautious. Use only repeat work you have evidence for.
Add them for first-year profit per customer.
Pick the share you’ll spend to win a customer. Write down why.
That’s your maximum cost per customer.
Estimate your close rate: how many leads become customers.
Multiply maximum cost per customer by your close rate. That’s your maximum cost per lead.
Before you buy any ads or leads, check the price against these numbers (see 20.1 Pre-Spend Checklist).
Track every lead’s source so you can see the real cost later (see 15.8 Lead-Source Tracking).
Recheck the numbers every quarter with real data.

What proof to keep

Your worksheet with first-job profit, repeat profit, chosen share, close rate, and both maximums
A lead source log once you start marketing
Monthly cost per customer by source

Keep these with your marketing records.

Common mistakes

Comparing cost per lead to job price. A $50 lead on a $200 job may lose money once job costs and close rate are counted.
Counting repeat work you don’t have. Use lifetime value only when you have proof customers come back.
Ignoring your time. Leads you have to chase, quote, and follow up cost time too.
Thinking ad spend raises map rankings. Google says you can’t pay for a better local ranking. Ads appear in separate ad spots.
No tracking. Without lead sources, you can’t tell which spending works.

When to get help from a pro

You can work this out yourself. A bookkeeper can confirm your job profit. A marketing adviser who works with local businesses can share typical close rates for your trade, but test with your own numbers. Ask:

Is my profit per job correct after all job costs?
What close rate should I expect from this lead source, and how will we measure it?

Bill’s note

[Bill: add a short story or opinion here. For example, a client who was paying more for leads than the jobs were worth, or how you compare paid leads to Google Business Profile leads.]

If you’d rather have this done for you, SiteSmarty manages Google Business Profiles to bring in customers without paying per lead.

How I did this for SiteSmarty

[Date I did this:]
[What I actually did, step by step: my first-job profit, repeat profit, close rate, and limits]
[What it cost and how long it took:]
[What surprised me or what I’d do differently:]
[Screenshot or photo to add, with private info blurred: my maximum cost worksheet]
[Result so far:]

Questions people ask

What is customer acquisition cost? The total you spend on marketing divided by the number of new paying customers it brings in.

What’s the difference between cost per lead and cost per customer? Cost per lead is what each inquiry costs. Cost per customer is what each buyer costs. Divide cost per lead by your close rate to get cost per customer.

Does repeat business change how much I can spend? Yes. If customers reliably come back, each one is worth more, so you can spend more to win them. Count only repeat work you have evidence for.

Can I pay Google to rank higher on the map? No. Google says you can’t pay for or request a better local ranking. Ads show separately and are marked as ads.

Audit check

Question: Has the owner set a written maximum cost per customer and cost per lead before spending on marketing?
Pass looks like: A worksheet with first-job profit, cautious repeat profit, chosen share, close rate, and both maximums, plus a lead source log once marketing starts.
Fail looks like: No limit. Lead prices compared to job price instead of job profit. Repeat value assumed with no evidence. No tracking.
Evidence to collect: The worksheet, the lead source log, and monthly cost per customer by source.

Where this fits

Do this first: 7.8.12 Cash Needed Before Customers Pay, 7.8.11 Break-Even Point

Do this next: 7.8.14 Cash Reserve

Sources

Google Business Profile Help, "Tips to improve your local ranking on Google" (checked October 16, 2026)
U.S. Small Business Administration, "Break-even point" (checked October 16, 2026)

This page explains general rules and Bill's own experience. It is not legal, tax, or insurance advice. Talk to a qualified professional about your situation.