--- title: Customer Lifetime Value (LTV) — definition and estimate | Siite description: "Customer lifetime value explained: how repeat work and referrals change what you can afford to spend to win a customer, and how to estimate it roughly." url: "https://siite.co/dictionary/customer-lifetime-value" type: static generatedAt: "2026-10-22T08:21:10.762Z" --- Metrics & Analytics # Customer Lifetime Value The total profit a customer produces over the whole relationship — every repair, maintenance visit, replacement and referral, not just the first invoice. Also goes by CLV, LTV [![Siite](/images/layout/logo.svg)Written by Siite](/about/)Updated September 8, 2026 ## Entry contents [All Terms A to Z←Browse the full dictionary](/dictionary/) Lifetime value is the profit a customer produces across the whole relationship, not the first invoice. For most local businesses that means the first job, the repeat work, the eventual large replacement, and the neighbors they send you. It is the number that decides what you can afford to spend to win one. > **Briefly explained** > > - Total profit from one customer, over the whole relationship. > - Use profit, not revenue. > - It sets the ceiling for acquisition cost. > - A rough estimate is enough to change decisions. ## Why does acquisition cost make no sense without it? Because a cost is only high or low relative to what it buys. A figure that looks alarming against a single small job can be a bargain against a household that stays with you for eight years and replaces a major system through you. The same number, read against the first invoice alone, gets the channel cut. See [customer acquisition cost](/dictionary/customer-acquisition-cost/). ## How do you estimate it without a data team? You need four numbers, and none of them has to be exact. 1. Average profit per job, by department 1. Average number of jobs per customer per year 1. How many years the relationship usually lasts 1. Multiply, then subtract what it costs to serve them The result will be rough. It only has to be right enough to tell you whether acquisition is affordable, and whether retention deserves more attention than the next campaign. ## What does it change about where you spend? It changes two things, and the second usually comes as a surprise. - **The ceiling on acquisition.** You can outbid competitors who only count the first job, and still make more per customer. - **The case for retention.** Maintenance programs, reminders set from install dates and a steady review habit often move this number further than any ad campaign, for a fraction of the cost. See [email flow](/dictionary/email-flow/). ## Why do two channels with the same cost per lead produce different businesses? They bring different people. A source full of price shoppers and a source full of households looking for somebody to keep can post identical numbers at the top of the funnel, and diverge completely over five years. Lifetime value is where that difference finally becomes visible. ## What do the terms mean? - **LTV or CLV:** The same thing. Lifetime value. - **Retention:** Keeping a customer, as opposed to winning one. - **Churn:** How quickly a customer base leaks. - **Payback period:** How long before a customer has earned back what they cost. - **[Average ticket](/dictionary/average-ticket/):** One job’s value. The first building block of this calculation. Owner questions ## What owners ask us about Customer Lifetime Value ### How far out should lifetime value look? +Far enough to include the replacement cycle in your line of work. In some lines of work that is a decade. In others it is one job plus the referrals that follow it. ### Should it use revenue or profit? +Profit. Revenue-based figures make expensive, low-margin work look like your best customer segment, and budgets follow the figure. ### How does it change my ad budget? +It sets the ceiling. A business that keeps customers for years can pay more to win one, and can outbid competitors who only count the first invoice. ### What if my records do not go back far enough? +Estimate from what you have and mark it as an estimate. A rough number that includes repeat work beats a precise one that pretends every customer buys once. ### Does it include referrals? +It should, and most calculations leave them out because they are hard to attribute. If you ask new customers how they found you, you can at least see the pattern.Put this to work ## Guides that use this Step-by-step playbooks from the team, written for owners doing the work themselves. No sign-up and no email required. [### HVAC maintenance plan SMS: one-job customers to recurring revenue Most Texas HVAC operators convert under 12% of jobs into maintenance plans. The right SMS automation lifts that to 30-40% and sustains review velocity. Read the guide→](/articles/hvac-maintenance-plan-sms-automation/)4.9191 reviewsWhere this turns into work ## Spending against the whole relationship The maintenance program, the reminders and the review habit that turn one job into ten — and the number that shows what winning a customer is really worth. [See the service→](/services/marketing-automation/)[Ask us about it](/contact/) ![Leonardo Miodrag, CMO, Partner at Siite](/images/team/panel/leonardo-miodrag.webp) *Our CMO* ## Related entries - [### Customer Acquisition Cost The full cost of winning one paying customer — marketing and sales spend for a period divided by the number of new customers it produced.](/dictionary/customer-acquisition-cost/) - [### Average Ticket The average revenue per completed job — total revenue divided by number of jobs — used to judge whether a marketing channel is bringing the work you actually want.](/dictionary/average-ticket/) - [### Review Velocity The rate at which a business earns new reviews over time — a steady, recent flow, rather than a large total collected years ago.](/dictionary/review-velocity/) [All terms A to Z Browse every term A to Z Open the dictionary→](/dictionary/)