Measure growth efficiency in one number.
SaaS Quick Ratio (pioneered by Social Capital) measures growth efficiency by comparing revenue gains to revenue losses. It's a single number that tells you if your SaaS is healthy, stalling, or dying.
• Numerator (Growth): All new revenue — new customers, upgrades, reactivations
• Denominator (Loss): All lost revenue — churned customers, downgrades
• Pre-PMF: Don't focus on Quick Ratio yet. Fix retention first.
• Early Growth ($1M-$5M ARR): Target > 2.0. Below 1.5 means churn is killing you.
• Scale ($5M-$20M ARR): Target > 3.0. Should have product-market fit + efficient acquisition.
• Hypergrowth ($20M+ ARR): Target > 4.0. Expansion revenue should exceed churn.
Increase numerator:
• Better lead generation (higher new MRR)
• Usage-based pricing (expansion MRR)
• Win-back campaigns (resurrected MRR)
Decrease denominator:
• Reduce churn (better onboarding, customer success)
• Prevent downgrades (usage alerts, plan optimization)
• Annual contracts (reduce monthly churn)
Interactive calculator with MRR movement tracking, trend analysis, and benchmarking.