How do you calculate Customer Lifetime Value?

LTV = (ARPU × Gross Margin %) ÷ Churn Rate %. For example, if ARPU is $100, gross margin is 80%, and monthly churn is 5%, then LTV = ($100 × 80%) ÷ 5% = $1,600. This represents the total profit a customer generates over their lifetime. PM Toolkit's LTV calculator applies this formula automatically with industry benchmarks.

What is a good LTV:CAC ratio for SaaS?

A healthy LTV:CAC ratio for SaaS is 3:1 or higher (David Skok, forEntrepreneurs), meaning each customer generates at least three dollars in lifetime value for every dollar spent on acquisition. A ratio of 5:1 or above is strong, but can also signal you are under-investing in growth. PM Toolkit calculates your LTV:CAC ratio instantly using three methods (Simple, SaaS, and Gross Margin adjusted) so you can benchmark against industry standards and identify whether to scale spend or optimize retention.

Should I use gross margin in my LTV calculation?

Yes, always multiply LTV by gross margin (typically 70-85% for SaaS, per Benchmarkit 2025) when comparing to CAC or acquisition spend. This gives you profit LTV rather than revenue LTV. Ignoring gross margin can lead to overspending on acquisition by 20-50%, depending on your gross margin.

How can I improve my customer lifetime value?

Improve LTV by: 1) Reducing churn through better onboarding and product improvements, 2) Increasing ARPU through upsells and feature expansion, 3) Optimizing pricing strategy, 4) Implementing annual contracts, and 5) Focusing on high-value customer segments.

When is my LTV calculation reliable?

Wait 3-6 months after customer acquisition before using their data for LTV calculations. Early-stage churn can be 50% in month 1 but drop to 5% by month 6. For early-stage startups (<1000 customers), focus on 6-month LTV as longer projections are unreliable. PM Toolkit's free LTV calculator handles these adjustments automatically.

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Customer Lifetime Value (LTV) Calculator

How much revenue a customer produces over their entire relationship — the numerator in LTV:CAC.

Updated May 2026

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ARPU

Monthly revenue per active customer.

Monthly Churn Rate

Share of customers who cancel each month.

Gross Margin

Revenue remaining after direct costs (COGS).

CAC(optional)

Enter CAC to unlock LTV:CAC ratio and payback period.

Customer Lifetime Value

$—

Enter ARPU and churn rate, then click Calculate.

Why this matters

LTV is the north-star for acquisition spend — it tells you how much you can afford to pay for a customer. Pair it with CAC to read your unit economics, and remember: a 5% improvement in retention can lift LTV 25–95%.

LTV = (ARPU × GrossMargin%) ÷ ChurnRate%

Use monthly churn rate. Always include gross margin — revenue LTV overstates profitability by 20–30%.

Understanding Customer Lifetime Value (LTV) for SaaS Businesses

Customer Lifetime Value (LTV) represents the total revenue a customer will generate throughout their relationship with your business. For SaaS companies, LTV is the most critical metric for determining sustainable growth strategies and acquisition spend.

LTV Formula and Calculation

The standard LTV formula is: LTV = (ARPU × Gross Margin %) ÷ Monthly Churn Rate %

Where ARPU (Average Revenue Per User) is your monthly revenue per customer, gross margin accounts for direct costs, and churn rate is the percentage of customers who cancel each month.

LTV by Business Model

There's no published, segmented dollar benchmark for LTV. The ranges below are illustrative only, and actual LTV depends on ARPU, churn, gross margin, and customer segment.

B2B SMB SaaS: $1,000 - $5,000 LTV (illustrative)
B2B Mid-Market: $10,000 - $50,000 LTV (illustrative)
B2B Enterprise: $50,000 - $500,000+ LTV (illustrative)
B2C SaaS: $200 - $2,000 LTV (illustrative)

LTV:CAC Ratio Optimization

A healthy LTV:CAC ratio is 3:1 or higher, meaning your customer lifetime value should be at least three times your customer acquisition cost (David Skok, forEntrepreneurs). A ratio of 5:1 or above is strong, but it can also signal under-investment in growth.

What is Customer Lifetime Value (LTV)?

Customer Lifetime Value (LTV) is the total revenue a business expects from a single customer over their entire relationship. For SaaS companies, it is calculated by dividing average revenue per user by the monthly churn rate, helping determine how much to invest in customer acquisition.

SaaS LTV Formula

LTV = (ARPU × Gross Margin %) / Monthly Churn Rate

Healthy SaaS Benchmark

LTV:CAC ratio of 3:1 or higher

Learn about LTV optimization strategies→

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“Most teams obsess over acquiring new customers while ignoring that a 5% improvement in retention can increase LTV by 25-95%. I always calculate LTV before setting acquisition budgets — it forces you to think about the full customer journey, not just the top of funnel.”
— Prateek Jain, Head of Product

LTV benchmarks by SaaS segment

Sources: Illustrative range; varies by ACV, churn, and margin; Illustrative; actual realization depends on your projections
Segment	Benchmark
B2B SaaS (SMB <$10k ARR)	$1,000 - $5,000
B2B SaaS (Mid-Market $10k-100k ARR)	$10,000 - $50,000
B2B SaaS (Enterprise >$100k ARR)	$50,000 - $500,000+
B2C SaaS (Consumer)	$200 - $2,000
High-Performing SaaS Teams	Achieve 90%+ of projected LTV
Average SaaS Teams	Achieve 60-80% of projected LTV
Struggling SaaS Teams	Achieve <50% of projected LTV