Most early-stage founders track too many metrics — or the wrong ones. This guide covers the five numbers that tell the complete story of a recurring revenue business. Know these cold, and you can walk into any investor conversation with confidence.
Metric 1 — MRR (Monthly Recurring Revenue)
MRR is the normalised monthly revenue from all active recurring subscriptions or contracts. It is the heartbeat of a SaaS business.
MRR Calculation
MRR = Sum of all active monthly subscription values
For annual contracts: ACV ÷ 12
For usage-based: average of last 3 months
Track MRR movements monthly: • New MRR: From new customers • Expansion MRR: Upgrades and upsells • Churned MRR: Lost to cancellations • Net New MRR = New + Expansion − Churned
MoM growth rate above 15% is strong at early stage. Above 25% is exceptional.
Metric 2 — Net Revenue Retention (NRR)
NRR measures how much revenue you retain from existing customers over a period — including expansions and excluding churned customers. It is the single most important metric for a SaaS business because it determines whether growth compounds or fights against a leaking bucket.
NRR Formula
NRR = (Starting MRR + Expansion MRR − Churned MRR) ÷ Starting MRR × 100
Benchmarks: • Below 80%: Critical — you are losing money faster than you are expanding • 80–100%: Stable but not compounding • 100–110%: Healthy — expansion offsets churn • 120%+: World class — your existing customers grow your business without new sales
Best-in-class SaaS companies (Snowflake, Datadog) run NRR above 130%.
Metric 3 — Churn Rate
Churn is the percentage of customers (or revenue) lost in a given period. There are two types:
- →Logo churn: % of customers who cancelled
- →Revenue churn: % of MRR that was lost
Monthly Churn Benchmarks
Consumer SaaS: Under 5% monthly is acceptable
SMB SaaS: Under 3% monthly (36% annualised)
Mid-market SaaS: Under 1.5% monthly
Enterprise SaaS: Under 0.75% monthly
High churn is almost never a marketing problem. It is a product-market fit problem. Do not spend on acquisition until you have fixed churn.
Metric 4 — CAC Payback Period
CAC Payback Period is how many months it takes to recover the cost of acquiring a customer. It tells you how capital-efficient your growth is.
CAC Payback Calculation
CAC = Total sales & marketing spend in month ÷ New customers acquired in month
CAC Payback = CAC ÷ (ARPU × Gross Margin %)
Benchmarks: • Under 12 months: Strong. You can self-fund growth relatively quickly. • 12–18 months: Acceptable. Common in SMB SaaS. • Above 24 months: Requires significant capital to grow. Enterprise models can sustain this — SMB models cannot.
VCs increasingly weight CAC payback over LTV:CAC because it reflects actual capital efficiency, not theoretical lifetime value.
Metric 5 — ARPU (Average Revenue Per User)
ARPU sets the economics of everything else. A low ARPU business needs either massive scale or extremely low CAC to be viable.
ARPU and Business Model Implications
ARPU below ₹500/month: Requires viral or near-zero CAC acquisition. Almost impossible to build with a sales team.
ARPU ₹500–₹5,000/month: SMB SaaS territory. Low-touch inside sales model.
ARPU ₹5,000–₹50,000/month: Mid-market. Inside sales and customer success required.
ARPU above ₹50,000/month: Enterprise. Requires field sales, long cycles, complex procurement.
If your ARPU is below ₹1,000/month, you need to either raise it or find a channel where CAC is under ₹500.
Track these five metrics in a simple dashboard that updates every month. The act of tracking forces clarity. The pattern that emerges tells you where to focus every 30 days.