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The Complete SaaS Churn Calculator

Most founders underestimate churn's true cost by 3-5x. Calculate your real impact, model scenarios, and get actionable recommendations.

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Break down your churn type

Involuntary churn (failed payments) is often 20-40% of total churn and easier to fix. What % of your churn is voluntary (customers choosing to leave)?

75% vol.

Enter your MRR and churn rate above to see your results and unlock all calculators.

How This Calculator Works

Revenue Impact Calculation

This calculator projects your annual and 5-year revenue loss from churn using compound decay modeling. Unlike simple multiplication (MRR × churn rate × 12), our model accounts for the compounding effect — each month's churn reduces the base for the next month, meaning actual losses are higher than linear projections suggest.

Industry Benchmarks

Our benchmark data is sourced from public SaaS metrics reports including OpenView Partners, KeyBanc Capital Markets, and Bessemer Venture Partners' State of Cloud reports. Benchmarks are segmented by business model (B2B/B2C), industry vertical, and company stage to give you the most relevant comparison.

Recovery Scenarios

The 25% and 50% recovery scenarios model what happens when you implement retention infrastructure: dunning optimization, save flows, pricing adjustments, and proactive outreach. These aren't theoretical — they're based on typical outcomes from systematic churn reduction programs at Series A-B SaaS companies.

Frequently Asked Questions

How do you calculate SaaS churn rate?
SaaS churn rate is calculated by dividing the number of customers (or MRR) lost during a period by the total at the start of that period. For example, if you start the month with 100 customers and lose 5, your monthly customer churn rate is 5%. For revenue churn, divide lost MRR by starting MRR. This calculator computes both metrics automatically.
What is a good churn rate for SaaS?
For B2B SaaS, a good monthly churn rate is 1-2% (12-24% annually). For enterprise SaaS with annual contracts, aim for under 1% monthly (5-7% annually). B2C SaaS typically sees higher churn at 3-5% monthly. Net revenue retention (NRR) above 100% means expansion revenue offsets churn — top-performing SaaS companies achieve 110-130% NRR.
What is the difference between gross and net churn?
Gross churn measures total revenue lost from downgrades and cancellations, ignoring expansion. Net churn (or net revenue retention) accounts for expansion revenue from upsells and cross-sells. A company with 5% gross churn but 7% expansion revenue has negative net churn — meaning the existing customer base is growing. Net churn is the more important metric for investors and operators.
How does churn affect customer lifetime value (LTV)?
Churn directly determines LTV. The formula is LTV = ARPA / Churn Rate. At 5% monthly churn, average customer lifetime is 20 months. At 2% monthly churn, it's 50 months — 2.5x longer. Small improvements in churn have outsized impact on LTV, which is why churn reduction often delivers the highest ROI of any growth initiative.
What is involuntary churn and how do you reduce it?
Involuntary churn happens when customers leave due to failed payments, expired credit cards, or billing errors — not because they chose to cancel. It typically accounts for 20-40% of total churn. Reduce it with smart dunning sequences (retry logic + email reminders), card updater services, backup payment methods, and pre-expiration notifications. These systems alone can recover 20-30% of involuntary churn.
How do I benchmark my churn rate against industry averages?
Use this calculator's industry benchmark feature: select your business type and industry to see how your churn rate compares. General benchmarks — B2B SaaS: 3-7% annual for enterprise, 10-20% for SMB. B2C subscriptions: 5-10% monthly for streaming, 3-5% for fitness apps. Your benchmark depends on contract length, price point, and switching costs.
What is the revenue impact of reducing churn by 1%?
Reducing monthly churn by 1% has a compounding effect. For a $100K MRR company, going from 5% to 4% monthly churn saves $12K in the first month but over $500K+ over 5 years due to compounding retained revenue. This calculator shows your specific 5-year impact. Even small churn improvements create massive long-term revenue differences.
How do you calculate net revenue retention (NRR)?
NRR = (Starting MRR + Expansion MRR - Contraction MRR - Churned MRR) / Starting MRR × 100. An NRR of 110% means your existing customer base grows 10% per period without acquiring any new customers. This calculator computes NRR automatically when you enter expansion and contraction revenue figures.

Related Resources

Preston Zeller

Fractional Chief Growth Officer

Growth operator for Series A-B SaaS companies. 10+ years building revenue systems, recovering $1.43M+ in churn, and designing pricing and retention infrastructure that scales.