SaaS MRR Calculator
Calculate monthly recurring revenue, annual recurring revenue and customer lifetime value.
How to use this saas mrr calculator
- 1Enter your current number of paying customers — count only active, paying subscribers, not free tier or trial users.
- 2Enter your average monthly revenue per customer (ARPU) — if you have multiple pricing tiers, calculate the blended average from your billing system.
- 3Enter your monthly churn rate — the percentage of paying customers who cancel each month; find this in your billing platform or calculate it as cancellations ÷ customers at month start.
- 4MRR and ARR show the scale of your recurring revenue base; LTV shows the long-term value of each customer relationship.
- 5Compare LTV against your Customer Acquisition Cost (CAC) to assess unit economics; a 3× LTV:CAC ratio is the commonly cited minimum for a healthy SaaS business.
- 6Use the churn rate input to model the impact of churn reduction — even going from 3% to 2% monthly churn increases LTV by 50%.
How it's calculated
MRR = customers × ARPU. ARR = MRR × 12. LTV = ARPU ÷ monthly churn rate.
About the SaaS MRR Calculator
Monthly Recurring Revenue — MRR — is the metric that defines the SaaS business model and distinguishes it from every other type of software business. Unlike one-time license sales, MRR represents a contractual, recurring stream of income that compounds over time as the customer base grows. Understanding MRR, ARR, and the metrics that govern them is foundational to building, operating, and valuing a SaaS company.
The basic MRR calculation is straightforward: multiply your paying customer count by the average monthly revenue per customer. But the more important insight is how MRR can grow through three independent levers: new customer acquisition (new MRR), expansion within existing accounts (expansion MRR from upgrades and additional seats), and retention (preventing churn MRR). Most early-stage SaaS companies focus almost entirely on new MRR, but the companies that achieve the best long-term unit economics typically develop strong expansion MRR — existing customers growing their spend — which requires far less sales cost than acquiring new customers from scratch.
Churn rate is the number that ultimately determines whether a SaaS business creates compounding value or runs on a treadmill. At 5% monthly churn, the average customer stays for 20 months — and you must replace the entire customer base every 20 months just to maintain flat MRR. At 1% monthly churn, the average customer stays for 100 months — and the same acquisition engine produces dramatically more revenue because customers stay longer. Customer LTV = ARPU ÷ monthly churn rate, which means cutting churn in half doubles LTV, doubles your LTV:CAC ratio, and makes every customer acquisition dollar twice as productive. No other operational improvement in a SaaS business has an equivalent leverage effect.
The LTV:CAC ratio — Customer Lifetime Value divided by Customer Acquisition Cost — is the most important unit economics metric for SaaS investors. A 3:1 ratio means each acquired customer generates 3× what it cost to acquire them, with the standard payback period of 12–18 months. Below 3:1 signals either high acquisition costs or insufficient retention. Above 5:1 suggests possible underinvestment in growth — the company could be acquiring more customers profitably but is leaving opportunity on the table. Tracking LTV:CAC over time reveals whether the business is becoming more or less efficient as it scales.
For SaaS founders building toward institutional investment, the monthly metrics that matter most are: MRR growth rate (ideally 10–15%+ monthly for early-stage companies), net revenue churn (target negative), and LTV:CAC (target 3:1 or better). Companies that maintain strong performance on all three metrics typically find the fundraising process significantly easier than peers with the same absolute revenue numbers but weaker efficiency ratios. MRR is the numerator of the story; the retention and efficiency metrics are the denominator that determine how valuable that MRR actually is.
Frequently asked questions
What monthly churn rate is acceptable for SaaS?
Monthly churn benchmarks vary significantly by market segment. SMB-focused SaaS (small business customers) typically sees 3–7% monthly churn because small businesses close, change direction, and cut costs more frequently than larger organizations. Mid-market SaaS targets 1–3% monthly churn. Enterprise SaaS (annual contracts with procurement involvement) often achieves below 1% monthly churn and frequently achieves negative net churn through expansions — existing customers paying more over time offsets any cancellations. The lower your churn, the more valuable each customer you acquire becomes.
What is negative churn and how do I achieve it?
Negative net revenue churn occurs when expansion revenue from existing customers (upgrades, additional seats, add-ons) exceeds the revenue lost from cancellations and downgrades. For example, if you lose $1,000 in MRR from churned customers but gain $1,500 in expansion MRR from upgrades, your net churn is -$500 — your existing customer base is growing in revenue even without new customer acquisition. Achieving negative churn requires building upsell and cross-sell paths into your product, pricing that scales with customer usage or team size, and a customer success function focused on account expansion.
What is the LTV:CAC ratio and what should it be?
LTV:CAC is the ratio of Customer Lifetime Value to Customer Acquisition Cost. A ratio of 3:1 means each customer generates 3× what it cost to acquire them — widely cited as the minimum threshold for a healthy SaaS business. Below 3:1 suggests the business is spending too much to acquire customers relative to their lifetime revenue. Above 5:1 is excellent, though very high ratios sometimes suggest the company is underinvesting in growth. VCs typically expect 3:1 or better at Series A and look for improvement over time as acquisition efficiency improves.
How do I calculate my SaaS churn rate accurately?
Monthly logo churn rate = customers who cancelled during the month ÷ customers at the start of the month × 100. For example, 10 cancellations from 500 starting customers = 2% monthly churn. Revenue churn rate = MRR lost from cancellations ÷ MRR at start of month × 100. These two numbers can differ significantly if churning customers have different ARPUs than the average. Net revenue churn includes expansion and contraction: net revenue churn = (churned MRR − expansion MRR) ÷ starting MRR × 100. Negative net revenue churn is possible and highly desirable.
How does ARR relate to startup valuation?
ARR (Annual Recurring Revenue) is the primary revenue metric used to value SaaS companies. Valuations are typically expressed as a multiple of ARR — at peak market conditions, fast-growing SaaS companies traded at 20–40× ARR; in more normalized markets, 5–15× ARR is typical, depending on growth rate, net revenue churn, gross margins, and competitive position. Slower-growing, profitable SaaS businesses typically command 3–7× ARR. The specific multiple a company can command depends heavily on growth rate: companies growing 100%+ year-over-year command significantly higher multiples than those growing 20–30%.