SaaS Quick Ratio: Formula and Benchmarks

quick ratio = (new MRR + expansion MRR) / (churned MRR + contraction MRR)

All four components come from the same month. Mixing a quarter of expansion with a month of churn is the most common way to produce a number that looks excellent and means nothing.

• New MRR — recurring revenue from customers acquired during the month.
• Expansion MRR — additional revenue from existing customers through upgrades, seats or usage growth.
• Churned MRR — recurring revenue lost when customers cancel.
• Contraction MRR — recurring revenue lost when customers downgrade to a smaller plan.

Contraction belongs in the denominator. Leaving it out overstates the ratio, often by 30% or more in seat-based products, because downgrades are lost recurring revenue in exactly the same sense as cancellations.

For one month:

new MRR         = $12,000
expansion MRR   =  $3,000
churned MRR     =  $3,000
contraction MRR =  $1,000

quick ratio = (12,000 + 3,000) / (3,000 + 1,000) = 3.75

The business adds $3.75 of recurring revenue for every dollar it loses — healthy, but below the 4x best-in-class line. Dropping contraction from the denominator would report 5.0, which is the size of the error the omission creates.

The framework and the 4x target come from Social Capital’s published SaaS quick ratio definition. The bands are orientation, not a standard set by an accounting body.

The quick ratio tells you whether the engine is net-positive; churn tells you where the loss is. Two businesses with the same ratio can have opposite problems:

• High churn, high expansion — new customers leave quickly while existing ones grow. The ratio looks fine but the acquisition engine is leaking; fix onboarding.
• Low churn, low expansion — a stable base with little upsell. The ratio is driven by new sales alone; the quickest gain is usually packaging.

Read both numbers, and split them by segment. A blended ratio can mask a healthy enterprise cohort and a failing self-serve one.

The accounting quick ratio — current assets minus inventory, divided by current liabilities — measures short-term liquidity. The SaaS quick ratio measures growth efficiency. They share a name and nothing else; quoting the wrong one in an investor update is an avoidable embarrassment.

• Omitting contraction. The most frequent error and the one that flatters the number most.
• Mixing periods. Annual expansion against monthly churn produces a meaningless ratio.
• Using net new MRR. The ratio needs the four components separately; a single net figure cannot be decomposed.
• Ignoring segment mix. A blended ratio hides which cohort is failing.
• Reading one month. Renewal timing makes the monthly figure spiky; use a rolling three-month average.

Compute it from your waterfall in the SaaS quick ratio calculator, or start with the MRR vs ARR guide to get the components right.