TL;DR
- The SaaS quick ratio measures growth efficiency: (New MRR + Expansion MRR) / (Churned MRR + Contraction MRR). Above 4.0 is excellent. Below 2.0 is a warning.
- The metric was popularized by Mamoon Hamid at Social Capital. It answers one question: for every dollar of revenue lost, how many dollars of revenue are gained?
- Industry-wide quick ratios have declined from a peak of 2.55 in September 2021 to approximately 1.82 by March 2024, reflecting tighter capital markets and more disciplined growth.
- Quick ratio differs from net revenue retention because it includes new customer acquisition. A company can have strong NRR but a weak quick ratio if new customer growth stalls.
- Five levers to improve: reduce churn, increase expansion revenue, improve new customer acquisition efficiency, segment by tier, and track monthly with a rolling three-month average.
By Siddharth Gangal · Founder, Fairview · Updated May 22, 2026 · 16 min read
A SaaS company adds $100,000 in new monthly recurring revenue and loses $25,000 to churn and downgrades. The quick ratio is 4.0. Another company adds the same $100,000 but loses $50,000. The quick ratio is 2.0. Both companies report identical top-line growth. The first is building on solid ground. The second is running on a treadmill.
The SaaS quick ratio is the metric that separates these two stories. It measures growth efficiency, not growth volume. It tells you whether your revenue engine is gaining ground or merely replacing what leaks out the back. For operators preparing board packs, founders heading into fundraises, and RevOps teams building their weekly dashboards, this is one of the most actionable metrics in the SaaS toolkit.
This post covers the exact formula, what each component means, what good looks like by company stage, how the quick ratio differs from related metrics like net revenue retention, common calculation traps, and five concrete ways to improve your number.
Definition
SaaS quick ratio: the ratio of revenue gained (new MRR plus expansion MRR) to revenue lost (churned MRR plus contraction MRR) over the same period. It measures whether a SaaS company is growing efficiently or merely replacing lost revenue. Popularized by Mamoon Hamid at Social Capital.
What Is the SaaS Quick Ratio?
The SaaS quick ratio is a growth efficiency metric. It compares the revenue a company gains to the revenue it loses in a given period. The result is a single number that captures the quality of growth, not just the quantity.
Unlike the accounting "quick ratio" (also called the acid-test ratio), which measures liquidity by comparing current assets to current liabilities, the SaaS quick ratio has nothing to do with balance sheets. It is a subscription-business metric. It belongs in the same conversation as net dollar retention, CAC payback, and the Rule of 40.
The metric was popularized by Mamoon Hamid, a partner at Social Capital and an early investor in companies like Slack and Box. Hamid used the quick ratio as a screening tool to identify SaaS businesses with genuinely efficient growth engines. The concept spread through venture capital and is now a standard component of SaaS diligence.
The core insight is simple. Top-line ARR growth can mask a retention problem. A company growing 50% year-over-year might be acquiring customers aggressively while half its installed base churns out. The quick ratio exposes this. It forces the question: how much of our growth is net new ground, and how much is filling a hole?