MRR, ARR, and the SaaS metrics that matter
Monthly Recurring Revenue (MRR) is the normalised monthly revenue from all active subscriptions. It is the foundation of SaaS financial reporting because it provides a predictable, forward-looking view of revenue — unlike one-time sales businesses where revenue is recognised at the point of sale. ARR (Annual Recurring Revenue) is simply MRR multiplied by 12 and is used for annual planning, fundraising benchmarks, and company valuation (typically expressed as a multiple of ARR).
MRR is not total revenue. It excludes one-time fees (setup, professional services), usage-based charges that are not contractually recurring, and any revenue from expired or paused subscriptions. For businesses with annual or multi-year contracts, MRR is calculated by dividing the total contract value by the number of months in the contract — not recognised at the point of billing.
MRR movement and the waterfall
Ending MRR = Starting MRR + New MRR + Expansion MRR − Contraction MRR − Churned MRR
ARR = Ending MRR × 12
Net Revenue Retention (NRR) = (Starting MRR + Expansion MRR − Contraction MRR − Churned MRR) ÷ Starting MRR × 100
Gross Revenue Retention (GRR) = (Starting MRR − Contraction MRR − Churned MRR) ÷ Starting MRR × 100
Quick Ratio = (New MRR + Expansion MRR) ÷ (Contraction MRR + Churned MRR)
Gross MRR Churn Rate = (Contraction MRR + Churned MRR) ÷ Starting MRR × 100
ARPU = Ending MRR ÷ Active Customers
NRR above 100% means the existing customer base is growing even without new customers. This is the defining characteristic of the best SaaS businesses: expansion revenue from existing customers more than compensates for churn. A quick ratio above 4 is considered healthy; below 2 signals growth that is inefficient relative to revenue loss.
SaaS metrics benchmarks by stage
| Stage | MRR range | MRR growth (m/m) | Target NRR | Quick ratio |
|---|
| Pre-seed / MVP | < $10K | 20% – 50% | 90%+ (any retention) | Any > 1 |
| Seed | $10K – $100K | 10% – 30% | 95%+ | 3+ |
| Series A | $100K – $500K | 8% – 20% | 100%+ | 4+ |
| Series B+ | $500K+ | 5% – 15% | 110%+ | 4+ |
| Scale / IPO ready | $1M+ | 3% – 10% | 120%+ | 4+ |
Net Revenue Retention and why it is the most important SaaS metric
NRR measures what happens to revenue from your existing customer base over time, without counting any new customers. An NRR of 100% means every dollar of revenue from last month is still there this month. An NRR of 120% means the same cohort of customers is now generating 20% more revenue — even after all churned and contracted revenue is subtracted — because expansion revenue from upgrades and upsells more than compensates for losses. NRR above 100% creates a compounding effect: even if new customer acquisition stops, revenue continues to grow. This is the property that allows the best SaaS companies to achieve venture-scale returns.
Worked examples
Example: Growing SaaS business, monthly snapshot
Starting MRR: $150,000. New MRR: $18,000. Expansion MRR: $6,000. Contraction MRR: $2,000. Churned MRR: $4,500. Ending MRR = $150,000 + $18,000 + $6,000 − $2,000 − $4,500 = $167,500. ARR = $167,500 × 12 = $2,010,000. Net MRR change = +$17,500 (11.7% m/m growth). NRR = ($150,000 + $6,000 − $2,000 − $4,500) / $150,000 = $149,500 / $150,000 = 99.7%. GRR = ($150,000 − $2,000 − $4,500) / $150,000 = 96%. Quick ratio = ($18,000 + $6,000) / ($2,000 + $4,500) = $24,000 / $6,500 = 3.7x.
| Metric | Value | Benchmark | Assessment |
|---|
| Ending MRR | $167,500 | N/A | Healthy ARR of $2M+ |
| MRR growth | 11.7%/mo | 8% – 20% (Series A) | On track |
| NRR | 99.7% | 100%+ target | Just below benchmark, improve expansion |
| GRR | 96.0% | > 85% good | Strong gross retention |
| Quick ratio | 3.7x | > 4 target | Close to target, reduce churn |
| MRR churn | 4.3%/mo | < 2% good | Needs improvement |
Frequently Asked Questions
What is the difference between MRR and revenue?+
MRR is a normalised, forward-looking metric representing the run rate of contractually committed recurring revenue. It differs from recognised revenue in several important ways. First, MRR excludes one-time payments: a $5,000 setup fee is not MRR. Second, MRR is spread evenly over the subscription period regardless of billing timing — a $1,200 annual contract billed upfront contributes $100 to MRR each month, not $1,200 in month one. Third, MRR reflects active subscriptions regardless of whether the invoice has been paid or collected. Recognised revenue follows accounting rules (ASC 606 or IFRS 15) and may differ from MRR due to deferred revenue, refunds, or variable components. Investors and SaaS operators use MRR precisely because it strips out timing noise and shows the underlying recurring revenue engine.
What is a good NRR and why does it matter so much?+
Net Revenue Retention above 100% is the defining characteristic of exceptional SaaS businesses and is the metric most correlated with long-term value creation. At 100% NRR, a company can stop acquiring new customers and revenue stays flat. At 120% NRR, existing customer revenue grows 20% per year without a single new customer. This compounding growth from within the existing base dramatically reduces capital requirements, improves unit economics, and creates a more resilient business. Top-tier SaaS companies like Snowflake, Twilio at peak, and Veeva have achieved NRRs of 130% to 170%. Series A benchmarks typically require 100%+; later-stage investors often expect 110%+ to 120%+ for high-growth multiples. NRR below 90% is a serious red flag because it means the company must continuously replace lost revenue just to stay flat.
How is the SaaS quick ratio calculated and what does it measure?+
The SaaS quick ratio measures how efficiently a company is growing by comparing revenue gains to revenue losses. It is calculated as (New MRR + Expansion MRR) divided by (Contraction MRR + Churned MRR). A quick ratio of 4 means the company is generating $4 of new recurring revenue for every $1 lost to churn and downgrades. A quick ratio above 4 is considered healthy for early-stage SaaS; above 6 is strong. A quick ratio below 2 indicates the business is burning significant marketing and sales resources to grow slowly against high revenue leakage. Unlike NRR which focuses on the existing base, quick ratio includes new customer acquisition, making it a measure of total revenue generation efficiency relative to total revenue loss.
How should annual contracts be counted in MRR?+
Annual contracts are divided by 12 to calculate their monthly contribution to MRR. A customer paying $12,000 per year contributes $1,000 to MRR every month, regardless of when payment is received. This normalisation is what makes MRR comparable across businesses with different billing cadences. The key implication is that when an annual customer renews at a higher price, the expansion MRR is recognised immediately (the monthly increment multiplied by 12 divided by 12 = the monthly increment), not when the next invoice is sent. When an annual customer churns mid-contract, the churned MRR is the monthly contribution they were providing, and the remaining prepaid amount may need to be refunded (depending on contract terms) — this is a cash flow issue separate from MRR accounting.
What is the Rule of 40 and how does MRR growth relate to it?+
The Rule of 40 states that a healthy SaaS company should have revenue growth rate plus EBITDA margin summing to at least 40%. For example, a company growing ARR at 30% per year and operating at break-even (0% EBITDA margin) scores 30 on the Rule of 40. A company growing at 15% with a 25% EBITDA margin also scores 40. This rule exists because it acknowledges the trade-off between growth and profitability in SaaS: fast-growing companies typically invest heavily in sales and marketing, producing negative EBITDA, but the recurring revenue base they build justifies the near-term losses. Monthly MRR growth rate compounds into annual growth rate (a business growing 8% per month grows approximately 150% per year), which feeds directly into the Rule of 40 calculation. Companies scoring above 40 reliably attract premium valuation multiples.
How do I use MRR projections for fundraising?+
Investors evaluating a SaaS company at Series A or later want to see current MRR, trailing 6 to 12 months of MRR history showing the growth trajectory, a decomposition of MRR into new, expansion, contraction, and churned components, and a bottom-up projection of where MRR will be in 12 to 24 months. The projection should be built from first principles: number of salespeople hired, expected quota attainment, pipeline conversion rates, and expected churn rates — not just a straight-line extrapolation of current growth. The MRR waterfall (showing the four components) is particularly valuable to investors because it reveals whether growth is coming from efficient new acquisition, healthy expansion from existing customers, or both. High expansion as a percentage of total new MRR is a very positive signal.