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SaaS Metrics That Matter: MRR, LTV, CAC & NRR Guide

Master the SaaS metrics that drive success. Learn how to track MRR, LTV:CAC ratio, Net Revenue Retention, and churn to grow your subscription business.

Vivek KumarVivek Kumar
September 18, 202310 min read
SaaS Metrics That Matter: MRR, LTV, CAC & NRR Guide

SaaS businesses live and die by metrics. But with so many to track, which ones actually matter? As CEO of Softechinfra, I've helped SaaS founders build analytics-driven products. Here's a practical guide to the metrics that drive success.

3:1
Target LTV:CAC Ratio
120%+
Best-in-Class NRR
70-80%
Healthy Gross Margin
<5%
Annual Churn Target

Revenue Metrics

Monthly Recurring Revenue (MRR)

The foundation metric for any SaaS business:

  • Predictable monthly revenue
  • Excludes one-time charges
  • Track new, expansion, churn, and reactivation

Net Revenue Retention (NRR)

✅ Key Insight: NRR >100% means growth without new customers. Best-in-class companies achieve 120%+. This was a core metric we tracked when building Radiant Finance.

Average Revenue Per User (ARPU)

Your pricing health check:

  • Total revenue / customers
  • Track trends over time
  • Segment by cohort or plan

Customer Metrics

💰
CAC
Customer Acquisition Cost - all sales & marketing spend / new customers
📈
LTV
Lifetime Value - ARPU × customer lifetime or ARPU / churn rate
📉
Churn Rate
Customers lost / total customers (track monthly and annually)
⭐
NPS
Net Promoter Score - B2B SaaS benchmark is 30-40

LTV:CAC Ratio

💡 Rule of Thumb: LTV:CAC ratio should be at least 3:1 for a healthy SaaS business. Below 3:1 indicates acquisition costs are too high relative to customer value.

Growth Metrics

Month-over-Month Growth

Velocity indicator:

  • Formula: (Current - Previous) / Previous
  • Healthy early-stage: 10-20%
  • Scales down as you grow

Payback Period

Time to recover CAC:

  • CAC / (ARPU × Gross margin)
  • Healthy: 12-18 months
  • Affects cash flow planning
"The metrics that matter most depend on your stage. Early-stage, focus on activation and engagement. Growth-stage, focus on CAC and LTV. Scale-stage, focus on efficiency and NRR."
VK
Vivek Kumar CEO, Softechinfra

Operational Metrics

Gross Margin

Profitability foundation:

  • (Revenue - COGS) / Revenue
  • SaaS benchmark: 70-80%
  • Include hosting, support costs

Burn Rate and Runway

Financial health indicators:

  • Monthly cash burn
  • Cash / Burn = Months of runway
  • Plan 18+ months ahead

Tracking Best Practices

Build a Dashboard

Essential views:

  • Executive summary
  • Revenue breakdown (new, expansion, churn, reactivation)
  • Cohort analysis
  • Funnel metrics

Review Cadence

W
Weekly
Key operational metrics and pipeline
M
Monthly
Full dashboard review and MRR analysis
Q
Quarterly
Deep analysis, planning, and strategy

For more on building successful SaaS products, read our Product-Market Fit Guide.

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Tags:
SaaSMetricsBusiness AnalyticsStartupsGrowth
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Vivek Kumar

Vivek Kumar

Founder and CEO at Softechinfra with 10+ years of experience in software development and system architecture.