SaaS quick ratio

The SaaS quick ratio (not to be confused with the financial quick ratio for liquidity) divides the sum of new and expansion MRR by the sum of churned and contraction MRR. It reveals how effectively a company is growing relative to what it is losing.

A quick ratio of 4 means the company adds four pounds of MRR for every pound it loses. A quick ratio of 1 means the company is running on a treadmill: every pound gained is offset by a pound lost, resulting in zero net growth. Below 1, the company is shrinking.

The SaaS quick ratio was popularised by Mamoon Hamid at Social Capital as a way to see through headline MRR growth to the quality of that growth. Two companies can both grow MRR by 10% in a month. One might achieve this by adding 15% and losing 5% (quick ratio of 3). The other might add 50% and lose 40% (quick ratio of 1.25). The first company has far healthier growth dynamics because it retains most of what it earns.

The calculation requires the four MRR movement components tracked monthly:

SaaS Quick Ratio = (New MRR + Expansion MRR) / (Churned MRR + Contraction MRR)

For example, if a company adds 80,000 pounds in new MRR and 30,000 pounds in expansion MRR, while losing 15,000 pounds to churn and 10,000 pounds to contraction:

Quick Ratio = (80,000 + 30,000) / (15,000 + 10,000) = 110,000 / 25,000 = 4.4

This is a healthy ratio indicating that the company generates 4.4 pounds of new revenue for every pound lost.

The tree makes it clear that the quick ratio improves through two distinct strategies: growing the numerator (more new and expansion revenue) and shrinking the denominator (less churn and contraction). The denominator is often more impactful because it is typically smaller in absolute terms. Reducing churned MRR by 10,000 pounds has the same effect on the ratio as increasing new MRR by 10,000 pounds, but churn reduction is usually cheaper to achieve and compounds over time.

Mamoon Hamid originally suggested a benchmark of 4 or above for a healthy SaaS company. In practice, most successful SaaS companies operate between 2 and 5. Companies with very high quick ratios (above 6) are typically early-stage businesses with low churn simply because the customer base is still small.

1. 1

   Reduce voluntary churn through better onboarding

   Customers who do not reach their first value milestone within the first 30 days are far more likely to churn. Invest in activation flows that get customers to their aha moment quickly.

2. 2

   Recover involuntary churn with dunning automation

   Failed payments account for 20-40% of total churn in many SaaS businesses. Automated retry logic, card update reminders, and grace periods can recover a significant portion of this revenue.

3. 3

   Build expansion into the product

   Design pricing tiers and features that encourage natural expansion as customers succeed. Usage-based components, seat-based pricing, and high-value add-ons all drive expansion MRR.

4. 4

   Prevent contraction with value communication

   Customers downgrade when they perceive insufficient value from higher tiers. Proactive communication about feature usage, ROI, and success stories helps justify the current spend level.

1. 1

   Confusing with the financial quick ratio

   The financial quick ratio (current assets minus inventory, divided by current liabilities) measures liquidity. The SaaS quick ratio measures revenue growth efficiency. They are entirely different metrics.

2. 2

   Not tracking the ratio over time

   A single-month quick ratio can be volatile. Track it as a rolling 3-month average to identify meaningful trends rather than reacting to monthly noise.

3. 3

   Ignoring the composition of the numerator

   A quick ratio of 4 driven primarily by new MRR is less sustainable than one driven by a mix of new and expansion MRR, because new MRR requires ongoing acquisition spend while expansion does not.