SaaS Quick Ratio
Growth MetricsThe SaaS Quick Ratio, popularized by InsightSquared, is a single ratio that captures whether a SaaS company is winning faster than it is losing. It compares revenue inflows (new bookings and expansion) to revenue outflows (contraction and churn) in the same period.
It is the diagnostic version of NRR. Where NRR tells you the net result of expansion versus losses, Quick Ratio shows the relative scale of each side. A company can have NRR of 100% from a 1.0 quick ratio (lots of churn matched by lots of new sales) or from a 5.0 quick ratio (steady book, steady expansion). Both look identical in NRR but feel very different to operate.
Contents
Key takeaways
- Quick Ratio = (New MRR + Expansion MRR) ÷ (Churn MRR + Contraction MRR). The growth-to-decline ratio of the existing book.
- Above 4 is best-in-class; 2 to 4 is healthy growth; 1 to 2 is treading water; below 1 means the company is shrinking faster than it is acquiring.
- The metric is a leading indicator. Quick Ratio compresses 1 to 2 quarters before churn metrics show distress, making it an early-warning gauge for SaaS leadership.
What is the SaaS Quick Ratio?
The SaaS Quick Ratio is a sales-and-retention efficiency metric that divides total recurring revenue gained in a period by total recurring revenue lost in the same period. Higher numbers mean the growth engine is producing more dollars than the leakage engine is losing.
It is most useful as a leading indicator. By the time churn rates show a clear deterioration, Quick Ratio has often been signalling the same trend for one to two quarters. Investors and operators use it as an early-warning gauge that complements headline metrics like NRR and ARR growth.
How do you calculate the SaaS Quick Ratio?
The formula:
Quick Ratio = (New MRR + Expansion MRR) ÷ (Churn MRR + Contraction MRR)
Worked example: In a quarter, a SaaS company adds 200,000 EUR in New MRR and 80,000 EUR in Expansion MRR. It loses 40,000 EUR to Churn MRR and 20,000 EUR to Contraction MRR. Quick Ratio = (200,000 + 80,000) ÷ (40,000 + 20,000) = 280,000 ÷ 60,000 = 4.67.
Benchmark scale:
- Above 4: best-in-class. Strong growth and tight retention.
- 2 to 4: healthy growth.
- 1 to 2: net positive but not impressively so. Investigate which side is weaker.
- Exactly 1: treading water. Equal gains and losses.
- Below 1: shrinking. The business is losing more recurring revenue than it adds.
Quick Ratio vs NRR: when to use which
Both metrics describe the health of the recurring revenue base, but at different scopes:
- Quick Ratio includes new logo MRR in the numerator. It captures total commercial momentum (existing-book retention plus new acquisition).
- NRR excludes new logos. It captures only the existing-book dynamics.
Use Quick Ratio when the question is "are we winning faster than we are losing?" across the full GTM motion.
Use NRR when the question is "is our existing book a tailwind or a headwind?"
Quick Ratio of 5 with NRR of 95% is a possible combination: heavy new acquisition is masking weakening existing-book retention. The two together tell a story neither tells alone.
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Frequently asked questions
Should I use MRR or ARR for the Quick Ratio?
Either, as long as the inputs match. Most SaaS teams use MRR for the operational quick ratio because the cadence is monthly and the noise is lower. Annualizing both sides (using ARR) produces the same ratio but with quarterly volatility.
What's the lowest Quick Ratio that's still acceptable?
1.5 to 2 is the floor for most growth-stage SaaS. Below 1.5, the company is barely net-positive on its book and any deterioration pushes it into shrinkage. Some mature, slow-growth public SaaS run sustainably at 2 to 3, but anything below 1 should trigger executive review.
Can the Quick Ratio be gamed?
Yes, by stuffing new MRR with discounted or short-term deals that churn within 1 to 2 quarters. The metric responds in the period of the new sale, then deteriorates when those deals churn. Pair Quick Ratio with cohort retention curves to spot stuffing.