Customer Lifetime Value (LTV)

What is customer lifetime value?

Customer lifetime value (also called LTV, CLV, CLTV, or lifetime customer value) is the predicted total revenue a business will earn from a customer from first purchase to final interaction. For subscription businesses, LTV is typically calculated as average revenue per account divided by churn rate. For e-commerce, it's AOV multiplied by purchase frequency multiplied by average customer lifespan.

LTV matters because it defines the upper limit of what a company can spend to acquire a customer. A customer worth $12,000 over their lifetime can justify a $4,000 CAC. A customer worth $800 cannot. Without knowing LTV, acquisition budgets are set by guessing — and most companies guess too high.

For B2B SaaS, LTV is heavily influenced by NRR (net revenue retention). A company with 120% NRR sees each customer cohort grow 20% per year through expansions and upsells. A company with 85% NRR loses 15% of revenue from existing customers annually. Over 5 years, the LTV difference is dramatic: the 120% NRR cohort is worth 2.5x the 85% NRR cohort.

Customer lifetime value is not the same as ARR. ARR measures the current annualized revenue from a customer. LTV projects the total revenue across the entire relationship. A customer paying $24,000 ARR with a 3-year average lifespan has an LTV of $72,000 — before accounting for expansion or contraction.

Why customer lifetime value matters for operators

LTV determines whether growth is sustainable or a cash drain. A company growing 80% year over year with a LTV:CAC ratio below 2:1 is scaling losses. Every new customer costs more to acquire than they will ever return. Growth without LTV discipline is the most common way venture-funded companies fail.

The operational consequence is specific. A company with $8,000 LTV and $6,000 CAC has $2,000 of gross lifetime value per customer — before product costs, overhead, and support. If COGS consumes 20% of revenue, the actual profit per customer is $400 over the entire lifetime. That leaves no room for any acquisition cost increase.

Operators who track LTV by segment discover that different customer types produce dramatically different value. Enterprise customers might have 4x the LTV of SMB customers — not because they pay more per month, but because they churn at one-third the rate. This finding reshapes the entire go-to-market strategy.

Customer lifetime value formula

SaaS LTV (simple):
LTV = ARPA / Churn Rate

Example:
- Average revenue per account (ARPA): $850/month
- Monthly churn rate: 2.8%

LTV = $850 / 0.028 = $30,357

Expected lifetime revenue per customer: $30,357


SaaS LTV (with gross margin):
LTV = (ARPA x Gross Margin %) / Churn Rate

Example:
- ARPA: $850/month
- Gross margin: 78%
- Monthly churn rate: 2.8%

LTV = ($850 x 0.78) / 0.028 = $23,679 (gross profit LTV)


E-commerce LTV:
LTV = AOV x Purchase Frequency x Average Customer Lifespan

Example:
- AOV: $92
- Purchases per year: 3.4
- Average lifespan: 2.8 years

LTV = $92 x 3.4 x 2.8 = $875.84

What each component means:

• ARPA: Average revenue per account per month (SaaS). Use the average across all active accounts, not the highest-paying tier.
• Churn rate: Monthly customer churn rate. Lower churn dramatically increases LTV — dropping churn from 3% to 2% increases LTV by 50%.
• Gross margin: Applied to get profit-based LTV, which is more useful for CAC comparison.

Customer lifetime value benchmarks

How LTV varies across business models and customer segments.

Sources: SaaStr 2025 Benchmark Report, ChartMogul SaaS data (n=2,600), Shopify Commerce Trends 2025.

Common mistakes when calculating LTV

1. Using revenue LTV instead of gross profit LTV for CAC decisions

Revenue LTV divided by CAC overstates the ratio because it ignores COGS. A customer with $30,000 revenue LTV and 75% margin has $22,500 gross profit LTV. If CAC is $10,000, revenue-based LTV:CAC is 3:1 but profit-based is 2.25:1. The profit-based ratio is the one that determines business sustainability.

2. Calculating LTV from average churn instead of cohort churn

Average monthly churn includes both new customers (who churn fastest) and long-tenured customers (who rarely churn). This produces a number that describes neither group accurately. Calculate LTV by cohort — the Q1 2025 cohort has its own churn curve and its own LTV.

3. Projecting LTV from too little data

A 6-month-old company with 2.5% monthly churn cannot claim $40,000 LTV. Early churn rates include selection bias — the customers who would have churned in month 8 haven't had the chance yet. Wait for at least 3 churn cycles (typically 12-18 months) before treating LTV projections as reliable.

4. Treating all customers as having the same LTV

Enterprise customers might have 4x the LTV of SMB customers due to lower churn and higher expansion rates. If marketing targets "customers" without segmentation, most spend goes to the segment with the highest volume (usually SMB) but the lowest LTV. Segment LTV by deal size, industry, and acquisition channel.

How Fairview tracks customer lifetime value automatically

Fairview's Margin Intelligence calculates LTV by pulling customer revenue history from your CRM (HubSpot, Salesforce, Pipedrive) and payment data from Stripe. LTV is computed per customer segment — by plan tier, industry, acquisition channel, and deal size — so operators see which customers produce the most long-term value.

The Operating Dashboard displays LTV:CAC ratio by segment alongside churn rate and NRR. When a segment's LTV drops below the 3:1 CAC threshold, the Next-Best Action Engine flags it: "SMB segment LTV:CAC fell to 2.4:1. Monthly churn increased from 3.1% to 4.2%. Review onboarding and early-stage retention."

→ See how Margin Intelligence works

Customer lifetime value vs ARR

ARR tells you what a customer pays now. LTV tells you what a customer is expected to pay over time. A customer paying $24,000 ARR with an expected 3-year lifespan and 110% NRR has an LTV that's significantly higher than 3x $24,000 because revenue grows each year.

FAQ

What is customer lifetime value in simple terms?

Customer lifetime value is the total amount of money a customer will spend with your business from their first purchase to their last. If a customer pays $500 per month for an average of 28 months, their LTV is $14,000. It helps you decide how much you can afford to spend to acquire each customer.

What is a good LTV:CAC ratio?

A LTV:CAC ratio above 3:1 is considered healthy for B2B SaaS. Below 3:1 means acquisition costs are consuming too much of the customer's lifetime value. Above 5:1 often indicates underinvestment in growth — the company could spend more on acquisition and still maintain healthy economics.

How do you calculate LTV for a SaaS company?

Divide average monthly revenue per account by monthly churn rate. If ARPA is $800/month and monthly churn is 2.5%, LTV = $800 / 0.025 = $32,000. For profit-based LTV (more useful for CAC comparison), multiply ARPA by gross margin percentage before dividing by churn.

What is the difference between LTV and CLV?

They are the same metric. LTV (lifetime value) and CLV (customer lifetime value) are used interchangeably. Some companies use CLTV as a third abbreviation. All refer to the total expected revenue (or profit) from a customer over the full relationship.

How do you improve customer lifetime value?

Four approaches: reduce churn rate (the highest-impact lever — a 1% reduction compounds dramatically), increase expansion revenue through upsells and cross-sells, raise AOV or contract value through pricing and packaging changes, and increase purchase frequency for e-commerce through retention marketing and subscriptions.

How often should you calculate LTV?

Quarterly for strategic decisions. Monthly for monitoring segment-level changes. LTV is a lagging metric — it takes months for churn and expansion patterns to stabilize in each cohort. Recalculate quarterly, compare cohorts annually, and use monthly snapshots only to flag sudden shifts in churn rate or expansion.

Related terms

• LTV:CAC Ratio — Lifetime value divided by acquisition cost, the core unit economics health check
• CAC (Customer Acquisition Cost) — The cost side of the LTV equation, determines acquisition investment limits
• Churn Rate — The rate at which customers leave, the single biggest lever on LTV
• NRR (Net Revenue Retention) — Revenue retained from existing customers including expansion, directly impacts LTV
• Cohort LTV — LTV calculated per acquisition cohort, more accurate than blended LTV

Fairview is an operating intelligence platform that tracks customer lifetime value by segment — alongside LTV:CAC ratio, churn rate, and NRR. Start your free trial →

Siddharth Gangal is the founder of Fairview. He built segmented LTV tracking into the platform after watching companies use a single blended LTV number to justify acquisition spend that only worked for their highest-value segment.