What Is the SaaS Quick Ratio?
The SaaS Quick Ratio measures how efficiently a business is growing its MRR — weighing new and expansion revenue against losses from churn and contraction.
Key Takeaways
- Quick Ratio = (New MRR + Expansion MRR) / (Churned MRR + Contraction MRR)
- A ratio above 4 is considered excellent; below 1 means you are shrinking
- Quick Ratio balances growth against retention in a single number
- Useful for benchmarking growth quality, not just growth speed
The formula explained
The SaaS Quick Ratio is calculated as: (New MRR + Expansion MRR) divided by (Churned MRR + Contraction MRR). It measures how many pounds of new recurring revenue you generate for every pound you lose. A Quick Ratio of 4 means you are generating £4 of new and expansion MRR for every £1 lost to churn and downgrades. A ratio below 1 means losses exceed gains — the business is contracting. A ratio of exactly 1 means growth and loss are in perfect balance and net MRR is flat.
Why it is more useful than raw growth rate
Two businesses can have the same MRR growth rate but very different Quick Ratios. Business A grows 15% by acquiring aggressively while churning 10% of revenue each month. Business B grows 15% with 2% churn and significant expansion. Business A's Quick Ratio might be 2; Business B's might be 8. Business B's growth is far more efficient — it requires less continuous acquisition to sustain. The Quick Ratio reveals the quality and sustainability of growth, not just its speed.
Benchmarks and interpretation
A Quick Ratio above 4 is generally considered excellent for a SaaS business, indicating strong growth with well-managed churn. A ratio of 2–4 is solid. A ratio of 1–2 suggests growth is occurring but is heavily offset by churn — a warning sign that deserves investigation. Below 1 is an acute problem: the business is shrinking in MRR terms. As a business scales and churn rates naturally rise in absolute pound terms, maintaining a high Quick Ratio becomes harder — this is why best-in-class SaaS companies invest heavily in expansion revenue to keep the numerator high.
Improving your Quick Ratio
Quick Ratio improves by either increasing the numerator (more new and expansion MRR) or decreasing the denominator (less churn and contraction). The most leverage typically comes from the denominator — reducing churn from 5% to 3% monthly has a compounding effect that is extremely difficult to match through acquisition alone. Increasing expansion MRR through upsell programmes also improves the ratio without requiring more marketing spend. Monitor Quick Ratio monthly alongside MRR growth rate to ensure your growth is becoming more efficient over time, not less.