SaaS Quick Ratio

The SaaS Quick Ratio measures the quality and efficiency of revenue growth by dividing revenue gained (new MRR + expansion MRR) by revenue lost (churned MRR + contraction MRR). A high quick ratio means you are growing new revenue significantly faster than you are losing existing revenue. A ratio of 4 or above is the widely cited benchmark for healthy growth-stage SaaS.

formula.sh

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

> New MRR: revenue from customers who did not exist in the previous month
> Expansion MRR: additional revenue from existing customers via upgrades or upsells
> Churned MRR: revenue lost from customers who cancelled entirely
> Contraction MRR: revenue lost from existing customers who downgraded

example

example.sh

This month: $18,000 new MRR, $6,000 expansion MRR, $4,000 churned MRR, $2,000 contraction MRR.

($18,000 + $6,000) ÷ ($4,000 + $2,000) = $24,000 ÷ $6,000

→ Quick Ratio: 4.0 — right at the healthy threshold

why it matters

Two companies can have identical MRR growth rates with drastically different health profiles. One grows by acquiring customers faster than it loses them; the other relies on expansion revenue to mask catastrophic churn. The quick ratio exposes the difference in a single number.

Investors increasingly use the quick ratio as a growth quality filter. A quick ratio below 2 at the Series A stage is a red flag that your retention engine is broken — no amount of top-of-funnel spend will fix the math. Above 4, you have a compounding growth machine where new revenue meaningfully outpaces leakage.

common mistakes

✗Excluding contraction MRR (downgrades) from the denominator — this inflates the ratio and masks the true leakage problem

✗Calculating the quick ratio on ARR instead of MRR, which smooths out monthly volatility and obscures deteriorating trends

✗Treating a quick ratio above 4 as permanent validation — it can collapse quickly if a large customer segment churns

pro tips

✓Track quick ratio by cohort month to see if newer acquisition cohorts have better or worse retention than earlier ones

✓If your quick ratio is below 3, focus on contraction and churn reduction before pouring money into new customer acquisition

✓A quick ratio above 4 gives you the mathematical license to increase CAC — you are converting investment into durable revenue efficiently

the mrrsucks take

Your SaaS Quick Ratio is 1.4. You are running on a treadmill with a slow leak in your shoes. Every new customer you land is barely outpacing the ones quietly cancelling while you celebrate on Twitter.

faq

What is a good SaaS Quick Ratio benchmark?+

Below 1 means you are shrinking. 1–2 is concerning. 2–4 is acceptable at early stages. Above 4 is the investor benchmark for a healthy growth-stage company. Elite companies achieve 6–8+.

How is the SaaS Quick Ratio different from Net Revenue Retention?+

NRR measures revenue retained from existing customers only and ignores new customer acquisition. The quick ratio includes new MRR and therefore measures overall growth quality, not just expansion efficiency.

Can I have a high quick ratio and still be in trouble?+

Yes — if the numerator is inflated by a single large expansion deal that will not repeat, or if new MRR is driven by heavy discounting that reduces LTV. Quality of the inputs matters as much as the ratio itself.

High churn roasts›Churn rate explained›

related metrics

./install-the-daemon

$9. 365 roasts. one public endpoint of pure shame.