Customer Lifetime Value (CLV/LTV): Definition, Formula & Examples (2026)
Customer Lifetime Value (CLV, also LTV) is the total gross profit a business expects to earn from a single customer across the entire relationship. In SaaS it is the single most important counterweight to CAC — and the metric most often inflated by ignoring gross margin and churn.
The CLV/LTV formula
For subscription businesses with relatively stable churn, the standard formula is:
LTV = ARPU × Gross margin × (1 ÷ Monthly churn rate)
Each input matters:
- ARPU — average monthly recurring revenue per account.
- Gross margin — revenue minus hosting, support, and payment costs. Most B2B SaaS lands at 75–85%.
- Monthly churn rate — gross revenue churn is usually the right denominator; using logo churn understates LTV for businesses with significant expansion.
Worked example: €500 ARPU SaaS
A mid-market SaaS charges €500/month ARPU, runs 80% gross margin, and loses 3% of MRR each month. What is the LTV?
LTV = €400 × 33.33
LTV = €13,333
That €13,333 is the gross-profit ceiling on what this company can spend acquiring a customer. With a healthy 3:1 LTV-to-CAC target, blended CAC must stay under ~€4,400 to maintain unit economics. If churn drops from 3% to 1.5% — typical after a serious onboarding rebuild — LTV doubles to €26,666 without changing pricing.
2026 B2B SaaS LTV benchmarks
| Segment | Typical LTV range | Median LTV:CAC |
|---|---|---|
| SMB B2B SaaS | $5,000 – $15,000 | 2.8:1 |
| Mid-market B2B | $25,000 – $75,000 | 3.5:1 |
| Enterprise B2B | $100,000+ | 4.5:1+ |
LTV alone is a vanity number. Always pair it with CAC payback (target <18 months) and gross margin. See our 2026 SaaS churn rate benchmarks for the churn assumptions behind these LTV bands.
Common LTV mistakes
- Using revenue instead of gross profit. Overstates LTV by 15–25%.
- Using net churn while net churn is negative. The formula breaks; LTV approaches infinity. Switch to a cohort-based payback model.
- Averaging across segments. SMB and enterprise often have 10× different LTVs. Blending them hides the truth.
- Ignoring early-tenure churn. If 30% of customers churn in month 1, the simple formula overstates LTV materially. Cohort analysis fixes this.
Why behavioral signals matter for LTV
LTV is a derivative of churn — and churn is a derivative of behavior. Accounts whose product engagement drops 40% in two weeks churn 4–6× more often within 60 days than steady-state accounts. Catching that signal early is the single highest-leverage way to lift LTV without raising prices or expanding the funnel.
Frequently asked questions
What is Customer Lifetime Value (CLV/LTV)?
Customer Lifetime Value (CLV or LTV) is the total gross profit a business expects to earn from a customer across the entire relationship. In SaaS the standard formula is ARPU × gross margin × (1 ÷ monthly churn rate). It tells you how much you can afford to spend acquiring a customer while still being profitable.
What is a good LTV for B2B SaaS in 2026?
Directional 2026 benchmarks: SMB B2B SaaS LTV typically lands at $5,000–$15,000, mid-market at $25,000–$75,000, and enterprise above $100,000. More important than the absolute number is the LTV-to-CAC ratio — a healthy SaaS sits at 3:1 or higher with payback under 18 months.
Should LTV use revenue or gross profit?
Gross profit. LTV expressed as revenue overstates economic value because it ignores hosting, support, and payment-processing costs. Multiplying ARPU by gross margin before dividing by churn gives a defensible number you can compare against CAC.
How does churn affect LTV?
LTV is mathematically the inverse of churn. Halving monthly churn from 4% to 2% doubles LTV. That is why behavioral churn prediction and onboarding investment usually return more than acquisition spend at the same dollar level.