SaaS LTV — Smart Financial Analysis
Calculate customer lifetime value for SaaS businesses. LTV = ARPU / Churn. Margin-adjusted LTV, LTV:CAC ratio, and payback period.
Why This Matters for Your Finances
Why: Customer Lifetime Value = ARPU / Monthly Churn Rate. It estimates total revenue from a customer over their lifetime. A $100/month customer with 2% monthly churn has an LTV of $5...
How: Enter Monthly ARPU ($), Monthly Churn Rate (%), Gross Margin (%) to get instant results. Try the preset examples to see how different scenarios affect the outcome, then adjust to match your situation.
- ●Customer Lifetime Value = ARPU / Monthly Churn Rate.
- ●3:1 or higher is the gold standard.
- ●Monthly Churn = Customers Lost / Total Customers at Start.
- ●Revenue Growth Rate + Profit Margin should exceed 40%.
📋 Quick Examples — Click to Load
⚠️For educational purposes only — not financial advice. Consult a qualified advisor before making decisions.
💡 Money Facts
SaaS LTV analysis is used by millions of people worldwide to make better financial decisions.
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— NBER Research
The average American makes 35,000 financial decisions per year—many can be optimized with calculators.
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Globally, only 33% of adults are financially literate, making tools like this essential.
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Customer Lifetime Value is the most important metric in SaaS, directly influencing growth strategy, pricing, and investment decisions. The best SaaS companies achieve LTV:CAC ratios of 5:1 or higher, with net revenue retention exceeding 130%. Understanding LTV helps founders determine how much to invest in customer acquisition while maintaining a sustainable unit economics model.
Sources: SaaS Capital, David Skok (Matrix Partners), Bessemer Venture Partners, KeyBanc SaaS Survey.
Key Takeaways
- • LTV = ARPU / Churn Rate — simple formula for quick estimates
- • Margin-adjusted LTV = ARPU × Gross Margin / Churn — use for unit economics
- • LTV:CAC ratio of 3:1 or higher is the gold standard; below 1:1 is unsustainable
- • Payback Period = CAC / (ARPU × Gross Margin) — months to recover acquisition cost
Did You Know?
How Does SaaS LTV Work?
Simple LTV Formula
LTV = ARPU / Monthly Churn Rate. A $100 ARPU customer with 2% monthly churn has an average lifespan of 50 months (1/0.02), so LTV = $5,000.
Margin-Adjusted LTV
LTV = ARPU × Gross Margin / Churn. This accounts for the cost to serve — only gross profit contributes to recovering CAC. With 80% margins, the same customer generates $4,000 in gross profit LTV.
Payback Period
Payback = CAC / (ARPU × Gross Margin). If CAC is $300 and monthly gross profit is $80, payback is 3.75 months. Under 12 months is healthy; over 18 months may indicate pricing or churn issues.
Expert Tips
LTV:CAC Ratio Benchmarks
| Ratio | Interpretation | Action |
|---|---|---|
| < 1:1 | Unsustainable | Fix pricing, churn, or CAC immediately |
| 1:1 - 3:1 | Concerning | Improve LTV or reduce CAC before scaling |
| 3:1 - 5:1 | Healthy | Gold standard — sustainable growth |
| > 5:1 | Excellent | Consider investing more in acquisition |
Frequently Asked Questions
What is SaaS LTV?
Customer Lifetime Value = ARPU / Monthly Churn Rate. It estimates total revenue from a customer over their lifetime. A $100/month customer with 2% monthly churn has an LTV of $5,000.
What is a good LTV:CAC ratio?
3:1 or higher is the gold standard. Below 1:1 means you're losing money on every customer. 5:1+ may mean you're underinvesting in growth. David Skok of Matrix Partners popularized this metric.
How is churn rate calculated?
Monthly Churn = Customers Lost / Total Customers at Start. A company with 1,000 customers losing 30/month has 3% monthly churn (31% annual). Net churn accounts for expansion revenue.
What is the SaaS Rule of 40?
Revenue Growth Rate + Profit Margin should exceed 40%. A company growing 30% with 15% margins = 45% (passing). Only ~30% of public SaaS companies pass the Rule of 40.
How does gross margin affect LTV?
Margin-adjusted LTV = ARPU × Gross Margin / Churn. With 80% margins, a $100 ARPU customer generates $80 in gross profit monthly. SaaS gross margins typically range 60-90%.
What is net revenue retention?
NRR measures revenue from existing customers over time, including expansions. 120% NRR means existing customers generate 20% more revenue year over year. Best SaaS companies have 130%+ NRR.
Key Statistics
Official Data Sources
⚠️ Disclaimer: This calculator is for educational purposes only. LTV estimates depend on assumptions (constant churn, no expansion) that may not hold. Actual customer behavior varies by cohort and market. Not financial or investment advice.