Why SaaS Metrics Matter
In SaaS, metrics are the language of growth. They tell you where you are, where you're going, and what's broken. Yet most SaaS companies track too many metrics and act on too few.
This guide covers every metric that matters, organized by growth stage, with formulas, benchmarks, and specific strategies for improvement.
Revenue Metrics
MRR (Monthly Recurring Revenue): Sum of all monthly subscription revenue. Formula: Sum of (customer count × monthly price per tier). Benchmark: Growing 15-20% month-over-month pre-PMF, 8-12% post-PMF.
ARR (Annual Recurring Revenue): MRR × 12. The primary valuation metric. SaaS companies typically valued at 8-30x ARR depending on growth rate.
Net New MRR: New MRR + Expansion MRR - Churned MRR - Contraction MRR. Decomposing MRR changes reveals where growth is really coming from.
ARPU (Average Revenue Per User): MRR / Active paying customers. Track trends — rising ARPU indicates successful upselling or pricing power.
Growth Efficiency Metrics
CAC (Customer Acquisition Cost): Total sales + marketing spend / New customers acquired. Include salaries, tools, and ad spend. Benchmark: Varies by ACV, but CAC should be recoverable in <18 months.
LTV (Customer Lifetime Value): ARPU × Gross Margin × (1 / Monthly Churn Rate). The single most important unit economics metric.
LTV:CAC Ratio: Should be >3:1 for a healthy business. Below 3:1 means unprofitable acquisition. Above 5:1 might mean you're underinvesting in growth.
CAC Payback Period: CAC / (ARPU × Gross Margin). How many months to recover acquisition cost. Target: <12 months for SMB, <18 months for enterprise.
Magic Number: (Current Quarter Revenue - Previous Quarter Revenue) × 4 / Previous Quarter S&M Spend. Above 0.75 = increase spend. Below 0.5 = improve efficiency.
Retention Metrics
Gross Revenue Retention: (Starting MRR - Churn - Contraction) / Starting MRR. Measures pure retention without expansion. Benchmark: >85% for SMB, >95% for enterprise.
Net Revenue Retention: (Starting MRR + Expansion - Churn - Contraction) / Starting MRR. Above 100% means growing without new customers. Benchmark: >110% for top-quartile SaaS.
Logo Churn Rate: Customers lost / Starting customers. Monthly benchmark: <3% for SMB, <1% for enterprise.
DAU/MAU: Daily active users / Monthly active users. Measures product stickiness. Benchmark: >20% is good, >50% is exceptional.
Metrics by Stage
Pre-Seed ($0-$100K ARR): Focus on activation rate, retention curve, and qualitative user feedback. Don't worry about CAC or LTV yet.
Seed ($100K-$1M ARR): Track MRR growth rate, churn rate, and time-to-value. Start measuring CAC and LTV once you have enough data.
Series A ($1M-$10M ARR): Full metrics dashboard. CAC payback, NRR, magic number, and gross margin should all be improving.
Series B+ ($10M+ ARR): Track efficiency metrics closely. Rule of 40, burn multiple, and revenue per employee determine valuation multiples.