SaaS Quick Ratio Calculator
Two companies can post the same net new MRR and have wildly different futures — one grows cleanly, the other sprints just to stay ahead of a leak. The SaaS quick ratio separates them. Enter your four MRR movements and see how many dollars you keep for every dollar you lose.
The SaaS quick ratio = (new MRR + expansion MRR) ÷ (contraction MRR + churned MRR). It measures the efficiency of growth: how many dollars of recurring revenue you add for every dollar you lose. A ratio above 4 is the mark of strong, durable growth; between 1 and 4 you are growing but leaking; below 1 you lose revenue at least as fast as you add it. Unlike net new MRR, the quick ratio exposes whether growth is clean or just outrunning churn.
SaaS Quick Ratio Calculator inputs and result
| Quick ratio | What it means |
|---|
How to use this calculator
- Pull your four MRR movementsFrom your billing or revenue system, get new, expansion, contraction, and churned MRR for the same period. These four numbers are the entire input — they should reconcile to your net new MRR.
- Enter gains: new and expansionNew MRR is revenue from fresh customers; expansion is more revenue from existing ones. Together they are everything you gained.
- Enter losses: contraction and churnContraction is downgrades from customers who stayed; churn is full cancellations. Keep them separate even though the ratio adds them — they diagnose different problems.
- Read the ratio against the bandsAbove 4 is strong, 2 to 4 is healthy, 1 to 2 is leaky, below 1 means you are shrinking. The ratio compresses as companies scale, so judge it against your stage.
- Export the resultCopy a share link, download the CSV for your model, or print a one-pager for the growth review.
RGM Expert Says
The quick ratio is our favourite single-number diagnostic because it catches a problem that net new MRR hides completely. A company can show a healthy net new figure every month while its quick ratio quietly slides from 4 to 1.5 — meaning growth is getting more expensive and more fragile even as the headline number looks fine. We chart the ratio over time precisely to catch that drift early.
What we love about it is the cheapest path to improvement is almost always the denominator. Founders instinctively try to lift a weak quick ratio by selling more, but the math rewards plugging leaks far more efficiently: every dollar of churn you prevent improves the ratio twice as hard as a dollar of new MRR, because it shrinks the bottom of the fraction. That insight redirects effort from acquisition to retention where it belongs.
We do warn clients not to chase a sky-high ratio at any cost. An extremely high quick ratio sometimes means a company is under-investing in growth and simply has very few customers to lose yet. As with most SaaS metrics, the right reading is contextual — we look at the ratio alongside net new MRR and stage before deciding whether it is good news or a sign of timidity.
How it works
The quick ratio is a fraction of momentum: everything you added to recurring revenue over everything you lost from it.
- New MRR — recurring revenue from newly acquired customers.
- Expansion MRR — added revenue from existing customers (upsell, seats, usage).
- Contraction MRR — revenue lost to downgrades from customers who stayed.
- Churned MRR — revenue lost to full cancellations.
Worked example: new $40,000 + expansion $15,000 = $55,000 gained; contraction $6,000 + churned $9,000 = $15,000 lost. Quick ratio = 55,000 ÷ 15,000 = 3.67 — healthy but short of the elite 4+ band. The metric was popularized by Social Capital’s Mamoon Hamid; see the quick ratio deep dive.
Why the quick ratio beats net new MRR
Net new MRR tells you how much you grew; the quick ratio tells you how cleanly. The same $40,000 of net new MRR can come from a company adding $50,000 and losing $10,000 (a quick ratio of 5) or adding $200,000 and losing $160,000 (a quick ratio of 1.25). The first is a durable machine; the second is a treadmill that will collapse the moment acquisition slows. Only the ratio surfaces the difference.
The metric was popularized by Mamoon Hamid, then of Social Capital, who proposed a SaaS quick ratio above 4 as the marker of efficient, high-quality growth. The logic is that a company adding four dollars for every one it loses has both a strong acquisition motion and a base that is not leaking — the two conditions that make growth compound rather than churn.
The most actionable insight is in the denominator. Because the ratio divides gains by losses, reducing churn and contraction improves it faster than adding new MRR — a dollar saved shrinks the bottom of the fraction while a dollar earned only grows the top. That is why teams with a weak quick ratio almost always get more lift from retention work than from another acquisition push.
How to read the quick ratio
The 4.0 threshold is a widely cited rule of thumb, not a law. The ratio naturally compresses as a company scales and has more revenue to lose, so weigh it against stage.
| Quick ratio | Read | Implication |
|---|---|---|
| Below 1 | Shrinking | Losses exceed gains — fix retention first |
| 1 to 2 | Leaky growth | New MRR mostly backfills losses |
| 2 to 4 | Healthy | Solid growth quality |
| Above 4 | Efficient | Strong, durable, capital-efficient growth |
What operators say about the quick ratio
A SaaS quick ratio above 4 signals efficient growth — you are adding far more recurring revenue than you are losing, which is the foundation of a durable business.
Growth without retention is a leaky bucket; the quickest way to grow faster is often to stop losing the customers you already won.