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SaaS LTV calculator — know what each customer is really worth

Enter your ARPU, churn rate, and gross margin. Get customer lifetime value, LTV:CAC ratio, payback period, and a health assessment of your unit economics.

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The formula

How SaaS LTV is calculated

Customer Lifetime Value is the total revenue you expect from a single customer over the entire relationship. The standard SaaS formula accounts for your average revenue per user, how much of that is gross profit, and how quickly customers churn.

LTV = ( ARPU × Gross Margin % ) ÷ Monthly Churn Rate
// where ARPU = monthly revenue per active customer

Example: $100 ARPU × 0.75 gross margin ÷ 0.03 churn
= $2,500 LTV per customer

The gross margin term is critical and often overlooked. Your LTV is not your total revenue per customer — it's your gross profit per customer. A $100/mo subscription with 40% gross margin has an LTV of $1,333 at 3% monthly churn, not $3,333. The calculator above applies gross margin automatically.

Benchmarks

LTV:CAC benchmarks by company stage

Your LTV number is only meaningful in context. The ratio that matters is LTV:CAC — how much lifetime value you generate per dollar spent acquiring a customer.

StageLTV:CAC ratioPayback periodAssessment
Seed / pre-revenueN/A — establish baselineBenchmark first
Early stage (Seed–Series A)2:1 – 3:112–18 monthsBuilding efficiency
Growth (Series A–B)3:1 – 5:18–14 monthsHealthy
Scale (Series B+)5:1+Under 12 monthsExcellent
Below 2:1 at any stage<2:118+ monthsAt risk

Source: Benchmarks based on OpenView Partners SaaS Benchmarks Report 2024, ProfitWell unit economics data, and First Page Sage SaaS CAC research. A 3:1 LTV:CAC ratio is the widely accepted minimum for a fundable, scalable SaaS business.

How to improve

5 levers to improve your LTV

If your LTV:CAC ratio is below 3:1, you have five levers to pull — and they're not all equal. Churn reduction compounds the fastest; pricing changes have the most immediate impact on MRR.

LEVER 01

Reduce monthly churn

Churn is in the denominator of the LTV formula — halving your churn doubles your LTV instantly. Even moving from 4% to 2% monthly churn is a 2× improvement. Better onboarding and customer success are almost always the highest ROI investment.

LEVER 02

Raise your prices

A 20% price increase with 5% customer loss still improves LTV by 14%. Most SaaS founders are significantly underpriced — if you're not losing any deals on price, you're almost certainly leaving revenue on the table.

LEVER 03

Add expansion revenue

Customers who expand (upgrade tiers, add seats, increase usage) have a dramatically higher LTV. Even 10% net revenue retention above 100% turns your LTV formula positive — customers become more valuable over time, not less.

LEVER 04

Improve gross margin

LTV is gross profit, not revenue. If your gross margin is 50%, improving it to 75% through better infrastructure, automation, or pricing increases LTV by 50% with no change in revenue. Particularly impactful for usage-based models with high COGS.

LEVER 05

Introduce annual plans

Annual contracts reduce churn by 30–50% by removing the monthly renewal decision. Offering even a 10–15% annual discount while locking in 12 months of revenue dramatically improves LTV and payback period simultaneously.

FAQ

LTV questions answered

A good LTV:CAC ratio is 3:1 or higher. The absolute LTV number is less important than the ratio — a $300 LTV with a $50 CAC is healthier than a $3,000 LTV with a $2,000 CAC. Elite SaaS companies achieve 5:1+. Below 2:1 at growth stage means either pricing, churn, or CAC needs urgent attention.
The standard formula is: LTV = (ARPU × Gross Margin) ÷ Monthly Churn Rate. For example, $100 ARPU × 75% gross margin ÷ 3% monthly churn = $2,500 LTV. Always use gross margin, not revenue — your LTV is profit per customer, not revenue per customer.
ARPU (Average Revenue Per User) is your monthly revenue divided by active customers — it's a snapshot of current revenue per customer. LTV is the total expected gross profit from a customer over their entire lifetime with you. LTV accounts for churn, gross margin, and time. ARPU is an input to the LTV formula, not the same metric.
Use monthly churn for the standard formula — this gives LTV in months (multiply by your monthly ARPU) or in dollars when using monthly ARPU. If you only know annual churn, divide it by 12 to approximate monthly churn for the formula. Using annual churn directly in the monthly formula will overestimate LTV significantly.
If your net revenue retention is above 100% — meaning customers expand faster than others churn — your LTV is technically infinite using the standard formula (negative net churn makes the denominator negative). In practice, model expansion revenue separately by tracking average account value growth per cohort over 12–24 months.

Want to model your full pricing?

The main SaaS pricing calculator combines LTV, CAC, MRR, and ARR projections for all four pricing models in one place.

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