What a customer is really worth: one job vs years of repeat business

Customer lifetime value is the total one customer pays you across every job, from the first call to the last. Most small business owners guess at it or ignore it and look at one job at a time. That is how a missed phone call looks cheap: it is one lost job. This post gives you a formula to see the real cost, with labeled sample numbers for a barbershop, an HVAC company and a law firm.

Is there a standard number for what a local customer is worth?

No. We searched for a reliable published repeat-business or lifetime-value figure for local trades and did not find one. The popular line that keeping a customer is several times cheaper than winning a new one traces to a 1990 article, and at least one research firm argues the gap varies by industry. So we do not quote a ratio. Everything below uses sample numbers that are clearly marked as samples. Replace them with your own books.

What is the formula for what a customer is worth?

Use this, with numbers from your invoices:

• A = what the first job pays.
• B = jobs per year a typical repeat customer books after that.
• C = average value of a repeat job.
• Y = years a customer typically stays.
• R = new customers a typical customer sends you, and D = what their first job pays.

Customer worth = A + (B x C x Y) + (R x D). If only some customers repeat, multiply the middle part by the share who do. For jobs that happen rarely, such as a furnace replacement, use the chance it happens during the years you count.

What is a barbershop customer worth?

Labeled sample numbers, not statistics. A regular books a $35 haircut every four weeks, which is 13 visits a year. Over three years that is 39 visits and $1,365. Suppose one customer in four also sends in a friend who becomes a regular for the same three years: that adds a quarter of $1,365, or about $341. Total: roughly $1,700 per regular (sample).

The lesson: one missed call about a $35 cut looks like $35. If the caller would have become a regular, it is closer to $1,700.

What is an HVAC customer worth?

Labeled sample numbers. A first repair is $450. The customer then books a $180 yearly tune-up for five years, which is $900. Say there is a 20% chance they replace their system in that time at $9,000, which counts as $1,800 when you weight it by the chance. Total: $450 + $900 + $1,800 = $3,150 (sample).

An emergency AC call at 9 p.m. is not worth the $450 repair. It might be worth thousands, which changes how you think about who answers at 9 p.m.

What is a law firm client worth?

Labeled sample numbers. A first matter pays $2,500. One client in ten comes back with another matter, adding $250 on average. Each client sends 0.3 new clients on average, each worth $2,500, or $750. Total: $2,500 + $250 + $750 = $3,500 (sample).

For a law firm, the referral line can matter most. A client who gets a good first call and a clear next step is the one who recommends you. Remember too that people spend more time on bigger decisions: a Northwestern Spiegel Research Center report on an online gift retailer found reviews lifted conversion more for a higher-priced product than a lower-priced one.² That is e-commerce, not legal services, so read it as a direction, not a rule.

How does a missed call change the math?

Take your calls that went unanswered, the share that were real prospects, the share you would have booked, and the customer worth from above:

Monthly cost of missed calls = missed calls x share that are real prospects x share you would book x customer worth.

Labeled HVAC sample: 20 missed calls a month, half of them real prospects, 40% of those would book, and a $3,150 customer. That is 20 x 0.5 x 0.4 x $3,150 = $12,600 a month of lifetime value, even though the first jobs alone would be only $1,800. Your numbers will be much smaller or larger. Do the math with yours.

What else is attached to that customer?

• Money already spent. If the call came from Google Ads or Local Services Ads, you paid to make the phone ring. On Local Services Ads, Google can bill a missed call as a lead when the customer stays on the line more than 20 seconds.³
• Reviews. In BrightLocal's 2026 survey, 80% of consumers said they are likely to use a business that responds to all of its reviews, so a happy repeat customer who writes a review is also marketing.¹
• Google. For Local Services Ads, Google lists responsiveness as a factor and says missed calls may negatively affect it.⁴ For regular Maps results, Google's guidance lists relevance, distance and prominence and doesn't list answering calls.⁵
• Who gets the job. A caller who is not answered does not wait. The next business on the list gets the first job and every job after it.

Should you count profit instead of sales?

Yes, once you have the sales version. A $9,000 furnace job and a $450 repair carry different costs for parts, labor and travel. Run the formula a second time using the profit left on each job instead of the price. The profit version is the one that tells you how much you can afford to spend to win a customer, whether that is an ad click, a Local Services lead or an hour of your own time on the phone.

How do you get your own numbers?

Pull a year of invoices, group them by customer, and for 20 customers write down the first job, later jobs and how they found you. If your software tracks referral source, use it. If not, start asking "how did you hear about us?" on every call. Round honestly, and use the low end of your estimates when you decide what a missed call costs.

B&G Solutions answers phones in a business's name around the clock, books jobs into its calendar or booking app, and handles the Google listing, reviews and ads that bring those customers in.

Common questions

What is customer lifetime value for a small business?

It is the total a customer pays you over all their jobs plus the jobs of people they refer. For a local business, a simple version is first job + repeat jobs over the years + referrals.

Is there an average lifetime value for HVAC, barbers or law firms?

We found no reliable published figure for local trades. Use your own invoices; the sample numbers in this post are examples, not statistics.

How do I figure out what a missed call costs?

Multiply missed calls by the share that were real prospects, the share you would have booked, and what a customer is worth over time.

Why does one lost job matter more than it looks?

Because the first job often leads to repeat jobs, referrals and reviews. Losing the first one loses all of them.

Does a missed call cost money before I lose the job?

If it came from Local Services Ads, Google can charge for a missed call when the customer stays on the line more than 20 seconds.

Sources

1. BrightLocal, Local Consumer Review Survey 2026 (2026)
2. Northwestern University Spiegel Research Center, How Online Reviews Influence Sales (with PowerReviews) (2017)
3. Google Local Services Help, How leads work (2026)
4. Google Local Services Help, How Local Services Ads are ranked (2026)
5. Google Business Profile Help, Tips to improve your local ranking on Google (2026)