Free Tool — CLV Calculator
What is one customer actually worth to your business?
A simple framework for putting a number on it. Takes about 90 seconds. The result is a planning range, not a precise figure — use it to think clearly about marketing spend.
Informational only — not financial advice.
This calculator is a simplified educational framework. It is not financial, accounting, tax, or business advice and should not be used as a substitute for guidance from a qualified professional.
The results are estimates based only on the values you enter. Before making real budget or business decisions, consult an accountant, financial advisor, or other qualified professional who can review your specific situation.
What does a typical customer spend per visit or per job? Use your best estimate.
How many times does a typical customer come back in a year? For one-time services, use 1.
How long does a typical customer stay with you? If unsure, 3 years is a reasonable starting estimate for most service businesses.
Of each $1 in revenue, how much is left after the direct costs of doing that one job? Subtract: materials, labor for the work, sub-contractor costs. Don't subtract overhead (rent, marketing, truck loan).
If you don't know, start conservative and refine from your books.
Fill in all four fields above to see your CLV and CAC ceiling.
How to use what you just calculated.
1. CLV is a ceiling, not a floor.
Your gross-margin CLV is what a typical customer is worth to you, in cash available, over their full relationship. It's an upper bound on what marketing should cost — not what you'll see on day one.
2. The CAC range is a planning tool, not a hard rule.
The widely cited 3:1 LTV-to-CAC ratio comes from SaaS unit-economics literature. It's useful as a starting point, but lower-margin businesses, businesses with high cost-to-serve, or those with lots of one-time customers should target a lower CAC. The range shown above brackets the conservative-to-common heuristic for your inputs.
3. Use the range to evaluate marketing offers.
When the next vendor pitches you (Yelp, Valpak, Google Ads, a billboard, us) — divide their monthly cost by the number of customers you'd realistically expect to produce. Does that math land inside your CAC range? If yes, consider it. If no, walk.
4. Retention is usually the biggest lever.
For most local service businesses, the cheapest way to grow CLV is to keep customers longer, not to find new ones. Service reminders, annual check-ins, loyalty programs. Doubling retention roughly doubles CLV at very low marginal cost.
Limitations of this calculator.
This is a simplified framework. It gets most small business owners roughly the right answer, but it deliberately omits several things a rigorous CLV model would include. Be aware of these before you commit real budget on the output:
- Constant retention assumption. The math assumes 100% retention for the years you enter, then a hard cutoff. Real customers churn gradually. A more rigorous model uses an annual churn rate.
- No time value of money. A dollar earned in year five is worth less than a dollar earned today. The calculator doesn't discount future cash flows. For long retention periods, this overstates CLV by 10-20%.
- Gross margin, not net margin. The output uses gross margin (revenue minus direct cost of service). It doesn't subtract overhead, admin, or taxes. The actual cash you can spend on marketing is a fraction of this number.
- Average customer, not your best customer. Most service businesses have a power-law distribution of customer value — a few customers are worth far more than the average. CLV against the average understates the value of targeting your best-customer profile specifically.
- No referrals or word-of-mouth. A customer who refers two others has higher effective value than the formula shows. For trust-driven local services, referrals can double effective CLV.
- The CAC heuristic is not universal. The 25-33% CAC range is a generalization of the SaaS “3:1 LTV:CAC” rule. It's a useful starting point but it's an industry rule of thumb, not a hard economic law. Validate against your own data.
This calculator is not financial advice. The numbers it produces are estimates based on your inputs and on a simplified framework. Always verify with a qualified accountant or financial professional before making business or budget decisions.
About the math.
CLV (gross-margin) = average transaction × annual frequency × retention years × gross-margin %. CAC range = CLV × 25% (conservative) to CLV × 33% (common heuristic). That's the entire formula.
We deliberately don't pre-populate industry benchmarks by category. Real CLV depends on your specific business, margins, and retention — and we'd rather give the framework than guess at numbers we can't verify for your specific situation.
Questions, want to dig deeper, or think the math should be improved? hello@getbloccard.com.
Curious how a Bloc Card spot compares to your CAC range?
We build shared local mail cards for hyper-specific geographies. One business per category. Monthly mailings. Compare our pricing against the CAC range you just calculated and see if the math works for your business.