CAC & LTV Calculator

Customer acquisition cost, lifetime value, 3:1 rule

Quick Answer

CAC & LTV Calculator: Customer acquisition cost, lifetime value, 3:1 rule. CAC & LTV Calculator uses standard business & tax formulas to compute accurate results instantly.

S&M spend/mo

New customers/mo

ARPU/mo

Gross margin %

Monthly churn %

LTV / CAC

1.12

Barely profitable — optimize before scaling

CAC¥2500

LTV¥2800

Avg lifespan20.0mo

CAC payback17.9mo

LTV/CAC zones

Burning money

Marginal

Healthy

Under-investing

LTV/CAC = 1.12

Steps

1CAC = ¥500,000 ÷ 200 = ¥2500
2Lifespan = 1 ÷ 5.0% churn = 20.0 months
3LTV = ¥200 × 70% margin × 20.0mo = ¥2800
4Ratio = 2800 ÷ 2500 = 1.12
5Payback = CAC ÷ monthly gross profit = 2500 ÷ 140 = 17.9 months

💡 Rules of thumb: LTV/CAC ≥ 3 is the classic healthy line; >5 means you're under-investing in growth; <1 means every new customer loses money. Also watch CAC payback: SaaS targets <12 months. Common mistake: using revenue for LTV instead of gross profit — always multiply by margin, or you'll overvalue customers by 2-3×.

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How to Use

Enter business figures: fill amounts, tax rates or costs in the CAC & LTV Calculator.
Instant results: payable/cost/profit indicators update live.
Check policy basis: results cite current tax rates and policy references for compliance.
Compare plans: adjust parameters to compare tax or cost outcomes.

Key Points

CAC & LTV Calculator is a free online business & tax tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: Customer acquisition cost, lifetime value, 3:1 rule.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

CAC & LTV Calculator formula

CAC & LTV Calculator uses standard business & tax formulas to compute accurate results instantly.

FAQ

How do I use the CAC & LTV Calculator?

Open the page and fill in the input fields — results update automatically. Customer acquisition cost, lifetime value, 3:1 rule.

Are the results accurate?

Yes. Standard tax and accounting formulas are used. Official filings should follow your tax authority.

Is it free?

Completely free, no registration required.

Are tax rates up to date?

Current standard rates are used and synced when policies change.

Can results be used for official filing?

For reference only. Official tax filing should follow the tax authority's determination.

Related Guides

Source & Updates

Based on current standard tax rates and accounting practice. Last updated: 2025-07

Authoritative sources:

Last updated: 2026-08-04

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. CAC & LTV Calculator[EB/OL]. https://www.yijiansuan.com/en/c/biz/cac-ltv

Results provided by this tool are for reference only and do not constitute professional advice.