ナレッジハブ・技術ガイド
SaaS Financial Modeling: MRR, ARR & Net Revenue Retention
In Software as a Service (SaaS), Monthly Recurring Revenue (MRR) and Net Revenue Retention (NRR) dictate company valuation and survival. Unpredictable churn rates can silently bankrupt a subscription startup before it achieves product market fit.
Venture backed founders demand absolute privacy for their cap tables and revenue projections. This forecaster models your growth trajectory entirely client side without saving your data to any external database.
コアアーキテクチャ & 計算式
Net MRR Growth = New MRR + Expansion MRR — (Downgrade MRR + Churn MRR)
If your Expansion MRR (upsells to existing customers) is greater than your Downgrade and Churn MRR combined, you achieve Net Negative Churn, which is the holy grail of SaaS scalability.
ベストプラクティスとガイドライン
- Separate SMB and Enterprise Cohorts: Never blend MRR metrics across vastly different customer segments. Enterprise contracts usually have near zero churn but 6 month sales cycles, whereas self serve SMBs churn rapidly.
- Focus intensely on NRR: The most valuable SaaS companies maintain a Net Revenue Retention above 120 percent, meaning their existing customer base grows in revenue year over year even if they acquire zero new users.
- Don't Count One Off Services in MRR: Onboarding fees, consulting hours, and hardware sales are non recurring. Including them artificially inflates your MRR and misleads investors.
よくある質問 (FAQ)
What is the difference between MRR and Cash Flow?
MRR is a normalized metric of momentum. If a customer pays $1,200 upfront for an annual plan, your cash flow increases by $1,200 that day, but your MRR only increases by $100.
What constitutes a 'good' churn rate?
For B2B SaaS targeting mid market companies, an annual churn rate of 5 percent to 7 percent is excellent. B2C SaaS or apps targeting very small businesses often experience 3 percent to 7 percent monthly churn.
How do investors value ARR?
SaaS valuations are typically calculated as a multiple of ARR (Annual Recurring Revenue), highly dependent on the revenue growth rate. A company growing 100 percent year over year commands a vastly higher multiple than one growing 10 percent.