Why MRR is the only number that matters early
Revenue is lumpy. MRR turns a SaaS business into a predictable system: every change in pricing, churn, or signup velocity shows up next month. Investors and operators both anchor on MRR because it forecasts cash and growth simultaneously.
- • Net revenue retention above 100% means you grow even with no new signups.
- • Cut monthly churn by 1 point before chasing more leads.
- • ARR = MRR × 12, but only when net retention is healthy.
Common SaaS revenue mistakes
Counting one-time fees or annual prepayments as MRR inflates the number. So does ignoring failed payments. Use this calculator's net new MRR row to keep the conversation honest.
MRR isn't just new sales minus churn — it's a system of four flows (new, expansion, contraction, churn) that compound into ARR. This calculator shows what each lever is actually worth so you stop optimizing the wrong one.
What each input means
Get these inputs right and the output is reliable. Get them wrong and the calculator just multiplies bad assumptions.
Current MRR
Recurring revenue this month, normalized monthly (annual plans / 12).
Typical range: Pre-seed: $0–10k. Seed: $10k–80k. Series A: $80k–500k. Series B: $500k–2M.
New MRR / month
Revenue from net-new accounts this month.
Typical range: 10–25% of current MRR for early-stage; 5–15% at scale.
Expansion MRR / month
Upgrades, seat adds, usage upticks from existing accounts.
Typical range: 20–40% of total new bookings is the world-class benchmark.
Gross monthly churn rate
% of MRR lost to cancellations and downgrades each month.
Typical range: 5–8% for SMB; 1–2% for mid-market; <1% for enterprise.
Worked examples
Real scenarios with the math walked through line by line.
Seed-stage SMB SaaS
Scenario: $40k MRR, $8k new/mo, $1k expansion, 6% gross churn.
Math: Churn loss = $40k × 0.06 = $2,400. Net new = 8,000 + 1,000 − 2,400 = $6,600/mo. ARR run-rate after 12mo ≈ $1.43M.
Outcome: Net retention 99% — survivable but limits compounding. Push expansion to $3k/mo to hit NRR 105%+.
Series A mid-market
Scenario: $200k MRR, $25k new, $12k expansion, 1.5% churn.
Math: Churn = $3k. Net new = $34k/mo. NRR = (200 + 12 − 3) ÷ 200 = 104.5%.
Outcome: Healthy NRR. ARR trajectory ~$2.4M → $4.8M in 12 months at constant growth.
Common mistakes
Where this calculation usually goes wrong in the real world.
- Tracking total bookings instead of MRR. Annual deals can mask churn for 11 months.
- Ignoring contraction MRR (downgrades). It's often 30–50% of true churn impact.
- Confusing logo churn with revenue churn. A whale leaving = 50 SMB customers leaving.
- Reporting net new MRR without showing the four flows separately.
When to use this calculator
- Monthly board / investor reporting.
- Forecasting runway impact of churn improvements.
- Pricing experiments — model expansion impact before launching.
- Deciding between hiring AEs (new) vs CSMs (expansion + churn reduction).
Glossary
MRR
Monthly Recurring Revenue. Normalized monthly value of all active subscriptions.
ARR
Annual Recurring Revenue. MRR × 12. The common metric above $1M.
NRR (Net Revenue Retention)
(Starting MRR + expansion − contraction − churn) ÷ starting MRR. >100% = compounding without new sales.
Quick Ratio
(New + Expansion) ÷ (Churn + Contraction). >4 is excellent; <1 means you're shrinking.
More questions answered
What's a good MRR growth rate?
T2D3 is the gold standard: triple, triple, double, double, double over 5 years. Monthly: 15–20% MoM at pre-seed, 8–12% at seed, 5–8% at Series A, 3–5% post-A.
How is MRR different from revenue?
MRR is normalized recurring subscription value. Revenue includes one-time fees, services, overages, and is recognized monthly per GAAP. A $12k annual prepay is $12k revenue in month 1 but $1k MRR each month.
Should I count free trials in MRR?
No. Only count paid, active subscriptions. Counting trials inflates MRR and breaks every benchmark.
Related guides
Long-form playbooks on the same topic, written by the RevenueLab editorial team.
SaaS Pricing Strategy: Per-Seat, Usage, Tiers, and the Hybrid Future
A framework for choosing a SaaS pricing model — when per-seat caps your growth, when usage-based makes revenue volatile, and how hybrid models stitch the two together.
Read the guideLTV:CAC Benchmarks for SaaS in 2026 (and What 'Good' Actually Means)
What ratios investors look for, why 3:1 isn't always the right target, and how payback period interacts with LTV:CAC across PLG, SMB, and enterprise SaaS.
Read the guideMethodology last reviewed: 2025-11 by the RevenueLab editorial team.
FAQ
What is MRR?
Monthly Recurring Revenue — the predictable revenue from active subscriptions in a given month, not counting one-time charges or setup fees.
What's a healthy SaaS churn rate?
B2C apps often run 3–7% monthly logo churn; B2B SaaS aims for under 2% monthly. Net revenue retention above 100% is the gold standard.
ARR vs MRR — which should I use?
Use MRR for monthly operating decisions and ARR for fundraising or annualized comparisons. ARR is just MRR × 12 at a single point in time.