Quick Ratio (SaaS)

What is Quick Ratio?

The SaaS Quick Ratio measures growth efficiency by comparing how much revenue you're adding versus losing. It's calculated as (New MRR + Expansion MRR) divided by (Churned MRR + Contraction MRR).

A Quick Ratio of 4 means you're adding $4 in new revenue for every $1 you lose. The higher the ratio, the more efficient your growth engine.

Why Quick Ratio Matters

Quick Ratio reveals whether you're growing from a position of strength or desperately trying to outrun a leaky bucket. A company adding $100K but losing $80K is in a very different position than one adding $100K and losing $20K.

Investors love this metric because it shows growth quality, not just growth quantity. High Quick Ratio companies can sustain growth even if new customer acquisition slows.

How to Calculate SaaS Quick Ratio Step by Step

Step 1: Pull your MRR movements for the month. You need four numbers from your billing system. Most subscription platforms (Stripe, Chargebee, Baremetrics) can generate this breakdown.

Step 2: Categorize each MRR change.

• New MRR: Revenue from brand-new customers who signed up this month → $18,000
• Expansion MRR: Revenue increase from existing customers (upgrades, added seats, usage growth) → $7,500
• Churned MRR: Revenue lost from customers who cancelled → $4,000
• Contraction MRR: Revenue lost from customers who downgraded (but didn't leave) → $1,500

Step 3: Apply the formula.

• Revenue added = $18,000 + $7,500 = $25,500
• Revenue lost = $4,000 + $1,500 = $5,500
• Quick Ratio = $25,500 ÷ $5,500 = 4.6

You're adding $4.60 for every $1 you lose — excellent growth efficiency.

Step 4: Track the trend. A single month can be noisy. Calculate a 3-month rolling Quick Ratio for a clearer picture. If it's declining, either your acquisition is slowing or churn is increasing — dig into which.

Step 5: Use Quick Ratio to diagnose growth problems.

• High Quick Ratio (4+) with low absolute growth → Not enough new customer volume. Scale acquisition
• Low Quick Ratio (below 2) with high new MRR → Churn is eating your growth. Fix retention
• Declining Quick Ratio over time → You're scaling acquisition but not fixing the leaky bucket

Common mistakes founders make:

• Confusing SaaS Quick Ratio with the accounting Quick Ratio (acid-test ratio) — completely different metrics
• Not separating contraction from churn (they tell different stories)
• Including one-time revenue in the numerator
• Ignoring that Quick Ratio naturally declines as you scale (churn grows with customer base)

Quick Ratio Benchmarks

Below 1: Shrinking. You're losing more than you're gaining. 1-2: Struggling growth. Too much energy fighting churn. 2-4: Healthy growth. Good balance. Above 4: Excellent. Very efficient growth engine.

Formula

Quick Ratio = (New MRR + Expansion MRR) ÷ (Churned MRR + Contraction MRR)

Higher is better. Aim for 4+ for healthy growth.

Example

Monthly MRR movements:

• New MRR: $25,000
• Expansion MRR: $10,000
• Churned MRR: $6,000
• Contraction MRR: $2,000

Quick Ratio = ($25K + $10K) ÷ ($6K + $2K) = $35K ÷ $8K = 4.4

Excellent ratio. You're adding $4.40 for every $1 lost. Growth is healthy and efficient.