Which LTV formula should I use?

Use the **simple ARPU × lifespan** approach when you have trustworthy historical customer life lengths. Use **ARPU divided by churn** when monthly churn is stable and well-defined for a subscription base. Use **margin-adjusted formulas with revenue churn** when finance measures retention on gross profit or when expansion materially changes account revenue. The right formula matches how your company already reports churn and margin so LTV aligns with board metrics.

What is a good LTV for a SaaS company?

There is no universal dollar LTV that defines “good” because average contract value and margin vary widely. Investors and operators usually evaluate **LTV relative to CAC**—often targeting around **3:1** or better—and **payback period** on the order of months, not years, for SMB SaaS. Enterprise SaaS may show higher absolute LTV with longer sales cycles, so benchmarks must be compared within similar ACV bands and churn profiles.

How does churn rate affect LTV?

Churn determines how long customers stay and therefore how many periods of ARPU or gross profit you collect. Higher churn **shortens** expected life and **lowers** LTV unless offset by rapid expansion. Small changes in monthly churn produce large swings in expected life when churn is low, which is why high-retention businesses obsess over basis-point improvements. Always align churn definitions with finance when feeding LTV models.

How do I increase my customer lifetime value?

Increase LTV by extending customer life (better onboarding, product value, and support), raising ARPU through upsells and pricing power, improving gross margin on delivery, and acquiring customers who naturally retain longer. Cross-functional initiatives—product, success, and marketing—matter because LTV is not owned by a single team. Measure interventions with cohort charts rather than snapshot averages.

What is the difference between LTV and CLTV?

**CLTV (customer lifetime value)** is simply another name for LTV; some teams use CLTV when emphasising individual accounts versus aggregate portfolio value. In enterprise contexts, CLTV sometimes implies **account-level** modeling including expansion, while LTV might refer to an average across customers, but there is no strict industry standard—define terms in your metrics dictionary.

How does LTV relate to CAC?

LTV measures the gross-profit value you expect from a customer while **CAC** measures what you spend to acquire them; together they form **unit economics**. Ratios near or below one signal unsustainable growth, while very high ratios may indicate underinvestment in acquisition. Always interpret the pair with **payback timing** and **cash flow**, because strong LTV with slow payback can still strain operations.

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LTV Calculator — Customer Lifetime Value Formula, Benchmarks & Examples

Translate ARPU, margin, and retention into expected gross-profit lifetime value using the formula that matches how you actually report churn.

Churn-based LTV explodes mathematically as churn approaches zero—always sanity-check inputs against the [Churn Rate Calculator](/tools/churn-rate-calculator) and finance definitions.

Avg Revenue per Customer / Month

Average monthly revenue per customer

Gross Margin

Percentage after cost of goods sold (e.g. 70 for 70%)

Monthly Churn Rate

Percentage of customers lost per month (e.g. 5 for 5%)

Adjust Monthly Churn Rate5%

0.5%20%

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This calculator provides estimates for learning purposes. Results depend on your inputs and assumptions.

What is Customer Lifetime Value (LTV)?

Customer Lifetime Value (LTV or CLTV) estimates the gross profit a typical customer generates from first purchase through churn or end of relationship, discounted or undiscounted depending on your standard. For SaaS, LTV anchors pricing tests, CAC budgets, and investor narratives; for ecommerce, it pairs with repeat purchase cycles. LTV is not one universal equation—teams choose simple averages, churn-inverted models, or margin-adjusted revenue churn forms to match their data. Because churn directly determines expected life, LTV should always be reconciled with the Churn Rate Calculator. Recurring revenue foundations belong in the MRR Calculator before you annualise ARPU assumptions.

Three LTV formulas teams actually use

Simple LTV = ARPU × Average Customer Lifespan when you have reliable cohort life in months or years. 2) Churn-based LTV = ARPU ÷ Monthly Customer Churn Rate for subscription models with stable exponential churn (ensure churn is expressed as a decimal per month). 3) Gross-margin-adjusted LTV = (ARPU × Gross Margin) ÷ Revenue Churn Rate when finance reports on gross-profit retention rather than logo churn. Keep periods consistent—monthly ARPU needs monthly churn. Common mistakes include using net revenue without margin, mixing logo churn with revenue churn, or applying enterprise churn to SMB cohorts.

Worked example: SMB SaaS with monthly churn

A product charges $120 ARPU per month with 78% gross margin and 2.5% monthly logo churn. Simple churn-based revenue LTV before margin is $120 ÷ 0.025 = $4,800 in booked revenue life; gross-profit LTV using margin might be ($120 × 0.78) ÷ 0.025 = $3,744 if you treat margin uniformly. Validate churn with the Churn Rate Calculator, then compare LTV to acquisition spend via the CAC Calculator.

LTV:CAC ratio tiers

Absolute LTV dollars vary by ACV; LTV:CAC is the common health check. Use the table below like the CAC guide: combine with payback and cash runway, not in isolation.

Tier	Range	What it means
Excellent	LTV:CAC > 5:1	Strong unit economics. Consider investing more in growth — you may be underscaling.
Healthy	LTV:CAC 3:1 – 5:1	Industry benchmark for sustainable SaaS growth. Maintain and optimise.
Warning	LTV:CAC 1:1 – 3:1	Acquisition is eating into lifetime value. Reduce CAC or improve LTV before scaling.
Critical	LTV:CAC < 1:1	Every new customer costs more than they return. Unsustainable at any scale.

LTV vs ARPU vs churn

ARPU is a rate, churn is a leak, and LTV is the integral of retained gross profit over time. Improving ARPU raises LTV directly; cutting churn multiplies life and often dominates. Expansion revenue increases LTV even when logo count is flat—model that inside your churn metric choice (net revenue churn). Tie ARPU and cohorts back to the MRR Calculator for consistency.

How to increase LTV

Reduce churn with onboarding, activation milestones, and success plays—see the Churn Rate Calculator. 2) Upsell and expand seats or usage to grow ARPU within accounts. 3) Raise prices where value supports it, especially on sticky cohorts. 4) Improve gross margin via COGS efficiency or pricing architecture. 5) Acquire better-fit customers who retain longer, which lifts LTV even if headline CAC is unchanged—pair with the CAC Calculator.

Cohort, expansion, and B2B nuance

Enterprise accounts with multi-year contracts need contract value and services margin in the model, not only subscription ARPU. Product-led businesses may separate free-to-paid lifetimes from paid-only lifetimes. When NRR > 100%, revenue-churn-based LTV can rise even with modest logo churn—use finance definitions to avoid double counting expansion.

Common LTV mistakes

Using revenue LTV while comparing to fully loaded CAC including success costs mixes bases. Underestimating churn during high-growth masks future compression. Ignoring discounting overstates LTV for long cycles. Treating one global LTV for enterprise and SMB blended together misguides spend allocation.

Use cases across teams

SaaS GTM teams set spend ceilings. Ecommerce brands estimate repeat revenue for payback. Agencies explain retention ROI to clients. Finance ties LTV to cohort reporting from the MRR Calculator.

Frequently Asked Questions about Customer Lifetime Value

What is customer lifetime value?: Customer lifetime value estimates how much **gross profit** a typical customer contributes over their entire relationship with your business, from first purchase through churn or inactivity. It helps teams decide how much they can afford to spend on acquisition, which segments to prioritise, and whether retention initiatives pay off. LTV can be calculated using simple averages, churn-based formulas, or more detailed cohort models depending on the quality of your data and how you define churn.
Which LTV formula should I use?: Use the **simple ARPU × lifespan** approach when you have trustworthy historical customer life lengths. Use **ARPU divided by churn** when monthly churn is stable and well-defined for a subscription base. Use **margin-adjusted formulas with revenue churn** when finance measures retention on gross profit or when expansion materially changes account revenue. The right formula matches how your company already reports churn and margin so LTV aligns with board metrics.
What is a good LTV for a SaaS company?: There is no universal dollar LTV that defines “good” because average contract value and margin vary widely. Investors and operators usually evaluate **LTV relative to CAC**—often targeting around **3:1** or better—and **payback period** on the order of months, not years, for SMB SaaS. Enterprise SaaS may show higher absolute LTV with longer sales cycles, so benchmarks must be compared within similar ACV bands and churn profiles.
How does churn rate affect LTV?: Churn determines how long customers stay and therefore how many periods of ARPU or gross profit you collect. Higher churn **shortens** expected life and **lowers** LTV unless offset by rapid expansion. Small changes in monthly churn produce large swings in expected life when churn is low, which is why high-retention businesses obsess over basis-point improvements. Always align churn definitions with finance when feeding LTV models.
How do I increase my customer lifetime value?: Increase LTV by extending customer life (better onboarding, product value, and support), raising ARPU through upsells and pricing power, improving gross margin on delivery, and acquiring customers who naturally retain longer. Cross-functional initiatives—product, success, and marketing—matter because LTV is not owned by a single team. Measure interventions with cohort charts rather than snapshot averages.
What is the difference between LTV and CLTV?: **CLTV (customer lifetime value)** is simply another name for LTV; some teams use CLTV when emphasising individual accounts versus aggregate portfolio value. In enterprise contexts, CLTV sometimes implies **account-level** modeling including expansion, while LTV might refer to an average across customers, but there is no strict industry standard—define terms in your metrics dictionary.
How does LTV relate to CAC?: LTV measures the gross-profit value you expect from a customer while **CAC** measures what you spend to acquire them; together they form **unit economics**. Ratios near or below one signal unsustainable growth, while very high ratios may indicate underinvestment in acquisition. Always interpret the pair with **payback timing** and **cash flow**, because strong LTV with slow payback can still strain operations.

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