SaaS Quick Ratio Calculator
Growth efficiency in one number.
Quick ratio
2.15×
growing, with leakage
Below 4, growth is increasingly expensive because acquisition is refilling a leaking base. The fix is almost always retention rather than more acquisition, since acquisition scales the leak too.
How the SaaS Quick Ratio Calculator works
The quick ratio is MRR gained divided by MRR lost. Below four, an increasing share of acquisition spend goes to replacement rather than growth — and the fix is almost always retention, because acquisition scales the leak alongside the fill.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
What is the SaaS quick ratio?
New plus expansion MRR, divided by contraction plus churned MRR. A ratio of 4 means you add four pounds for every one that leaks.
What is a good quick ratio?
Four or above is the conventional marker of efficient growth. Between two and four the business grows with meaningful leakage; below two it is refilling a bucket.
Why not just look at net new MRR?
Because net new hides the gross movements. Adding £10,000 and losing £8,000 nets the same as adding £3,000 and losing £1,000, and they are completely different businesses.
Does it apply outside software?
To any subscription business, yes. The terms translate directly to boxes, memberships and services.