SaaS metrics

SaaS Quick Ratio Calculator

The quick ratio compares the recurring revenue you gained against the recurring revenue you lost, in a single number. It answers a question the headline growth rate hides: is growth outrunning churn, or is churn eating your acquisition spend?

SaaS quick ratio

Excellent

4.08x

Best-in-class growth efficiency. The classic benchmark from Social Capital — growth is outpacing churn four to one.

($8,000 new + $2,200 expansion) ÷ ($1,900 churned + $600 contraction).

MRR gained: $10,200
MRR lost: $2,500
Net MRR change: $7,700
New MRR: $8,000
Expansion MRR: $2,200
Contraction share of loss: 24.00%

Gained vs lost

Gained: $10,200
Lost: $2,500

The quick ratio is the bare ratio of these two numbers: gained divided by lost.

SaaS quick ratio benchmarks

The SaaS quick ratio (from Social Capital) measures growth efficiency: revenue won divided by revenue lost. A ratio of 4 means you add four dollars of MRR for every dollar you lose — the point at which growth is comfortably outpacing churn.

Ratio	Verdict	What it means
>= 4 The published target. Growth outpaces churn four to one.	Excellent	Best-in-class
2 - 4 Solid, provided the trend is flat or rising rather than decaying.	Good	Healthy
1 - 2 Net positive, but churn consumes most of your new revenue.	Leaking	Needs work
< 1 The business contracts even while sales keep closing. Stop spending on acquisition.	Shrinking	Critical

Bands follow Social Capital's published SaaS quick ratio framework. Do not confuse this with the accounting quick ratio (current assets less inventory, over current liabilities).

Frequently asked questions

What is the SaaS quick ratio?

It is a growth-efficiency metric: the MRR you gained this month (new plus expansion) divided by the MRR you lost (churn plus contraction). A ratio of 4 means you add four dollars of recurring revenue for every dollar you lose. It was popularised by Social Capital and is widely used because it captures the balance between growth and churn in a single number.

Is this the same as the accounting quick ratio?

No, and the shared name causes real confusion. The accounting quick ratio — also called the acid test — is (current assets minus inventory) divided by current liabilities, and measures short-term liquidity. The SaaS quick ratio measures growth efficiency and has nothing to do with balance sheets. If you searched for liquidity, you want the accounting version, not this page.

What is a good SaaS quick ratio?

Four or above is the published best-in-class target. Two to four is healthy growth. Between one and two you are still growing in net terms but churn is consuming most of your new revenue. Below one the business is contracting — you lose more MRR than you add, even while the sales team is closing deals.

How often should I calculate the quick ratio?

Monthly, and you should read the rolling three-month trend rather than any single month. The ratio is volatile on small numbers: a month with unusually low churn makes any company look excellent, and one large annual contract landing can double a small company’s ratio for a month. The trend is the signal.

Does the quick ratio include contraction MRR?

Yes. The denominator is total lost MRR — churn from cancellations plus contraction from downgrades. Including contraction matters because downgrades are an early warning of churn: customers who reduce usage this month often cancel next quarter. Leaving contraction out makes the ratio look better and removes the leading indicator.

Why does my quick ratio show as infinite?

Because you had no MRR loss at all this month, so the denominator is zero and the ratio is mathematically unbounded. That is genuinely good news, but a single month with no losses is usually a small-sample artefact rather than a structural achievement. Look at the rolling three-month figure before drawing conclusions.

How the SaaS quick ratio works

The formula

quick ratio = (new MRR + expansion MRR)
            / (churned MRR + contraction MRR)

Worked example: $8,000 of new MRR plus $2,200 of expansion gives $10,200 gained. $1,900 of churn plus $600 of contraction gives $2,500 lost. The quick ratio is 10,200 / 2,500 = 4.08x — just above the best-in-class threshold, which means growth is outpacing churn four to one.

The elegance of the metric is that it refuses to let you look at growth and churn separately. A company adding $10,000 of MRR a month looks like a rocket ship until you notice it is losing $9,000, at which point the quick ratio of 1.1x tells the real story: the sales team is running hard to stay in place.

Not the accounting quick ratio

These two metrics share a name and nothing else. The accounting quick ratio (acid test) is (current assets - inventory) / current liabilities and measures whether a company can cover its short-term obligations. The SaaS quick ratio is a revenue-movement metric with no balance-sheet inputs at all. If a search brought you here looking for liquidity analysis, this is not the right calculator — but if you run a subscription business, the SaaS version is the one that predicts whether you will need to care about liquidity.

Common mistakes

Leaving out contraction. Downgrades are lost MRR. Excluding them flatters the ratio and discards the earliest available warning that customers are losing value.
Using customer counts instead of MRR. The metric is defined on dollars. Counting logos puts a $20-a-month plan on equal footing with a $2,000-a-month plan and produces a ratio that has little to do with the business.
Reading one month. Annual contracts cluster on renewal dates, so a single month can be dominated by one renewal cycle. Use a rolling three-month window.
Confusing the ratio with growth. A high quick ratio with a tiny base means you are efficient at a small scale, not that you are growing quickly. Both numbers matter.
Treating a high ratio as always good. Above roughly 4x, a company is often underinvesting in growth — the cash spent acquiring customers is returning so fast that more of it should probably be deployed.

What to do with the result

Below 1x: the business is contracting. Stop acquisition spend and work on retention — you are paying to fill a bucket with a hole in it.
1x to 2x: net positive but fragile. Every improvement in churn converts almost directly into net growth, because churn sits in the denominator.
2x to 4x: healthy. Watch the trend and check whether expansion MRR is contributing a growing share — that is the most durable component of the numerator.
Above 4x: best-in-class efficiency. Consider whether you can spend more on acquisition without letting the ratio fall below 3x.

Related calculators

The four inputs here are the same movers shown in the MRR waterfall. If churn is the problem, the churn calculator breaks it down further, and the LTV:CAC calculator shows what a better retention rate does to unit economics.

How the SaaS quick ratio is derived

Step 1 — separate the two directions of movement

Recurring revenue moves in four ways in any month. Two of them add to the base:

gained = new MRR + expansion MRR
lost   = churned MRR + contraction MRR

Expansion is money from existing customers who upgraded or added seats; contraction is money from existing customers who downgraded but stayed. Grouping contraction with churn rather than with new revenue is the whole design decision, and getting it wrong is the error the rest of this page is about.

Step 2 — express one as a multiple of the other

A ratio is the simplest possible comparison of two quantities, and the choice to divide rather than subtract is what makes the metric scale-free — a $40,000-MRR company and a $4,000,000-MRR company can be compared:

quick ratio = gained / lost

Subtracting would give a dollar figure that means different things at different sizes; dividing gives “dollars gained per dollar lost”, which reads the same at any scale. This is the same reasoning behind using ratios rather than absolutes anywhere you want to compare businesses of different sizes.

Step 3 — why 1x is the dividing line

At exactly 1x you gain a dollar for every dollar you lose, so MRR is flat and the sales team is running to stand still. Above 1x the base grows; below 1x it shrinks even while deals are being closed. The 2x and 4x thresholds are convention rather than mathematics — they describe how much of the growth effort is being consumed by churn, and the bands here follow Social Capital's published framework rather than inventing new cut-offs.

Assumptions and where this breaks

Every model is wrong somewhere. These are the assumptions baked in here, and the situations in which you should not trust the number that comes out.

Assumes

All four inputs are measured on the same MRR basis for the same period — monthly recognised recurring revenue, net of discounts, with annual contracts amortised over twelve months.
Contraction is counted in the denominator. Downgrades are lost recurring revenue exactly as cancellations are.
A single month is a meaningful measurement window. In practice annual renewals cluster, which is why the rolling three-month figure matters more than any one month.
MRR movements are treated as independent of each other — the metric compares totals, not the order in which they happened.

Does not apply when

One large annual contract is in the window. A single $50,000 renewal in a $40,000-MRR business moves the ratio more than any underlying change in performance.
MRR is under about $10,000. At that scale a handful of customers changes the ratio by whole integers and the metric is noise; use a rolling quarter, or customer counts.
You want a liquidity answer. This is not the accounting quick ratio. For the acid test you need current assets less inventory over current liabilities, which is a balance-sheet calculation this calculator does not perform.
Expansion and new MRR are lumped together upstream. A strong quarter driven entirely by price rises looks identical here to one driven by new customer acquisition, and those are very different businesses.
You are pre-revenue or usage-based with irregular billing — there is no stable MRR series for the ratio to divide.

Edge cases handled explicitly

Zero MRR lost gives a denominator of 0 and a mathematically infinite ratio; it is labelled as such rather than shown as a blank cell or an invented ceiling.
A rising ratio on a shrinking base is possible and is called out rather than presented as success.
Only one band can match a value — bands are checked highest-first and bottom out at 0, so 4.0 lands in exactly one band.

Where the benchmark numbers come from

The bands in the table above are drawn from the following published sources. They are orientation figures published for the whole industry, not a proprietary dataset and not a target — your own segment, stage and three-month trend matter more than any published band.

Social Capital: The framework that defines the SaaS quick ratio as (new + expansion) / (churned + contraction) and popularised the 4x best-in-class threshold. This calculator implements that published definition.
Commonly cited SaaS benchmark tables: The 2x/4x bands as used in investor updates. Treat them as orientation, not as a target set by any standards body.
Operator guidance on contraction: Guidance that counts downgrades as lost MRR rather than ignoring them; the calculator follows it because omitting contraction flatters the ratio.

Where no single institution publishes a figure, this page says so and labels it commonly cited rather than attributing it to a named firm. Nothing on this site is presented as proprietary data we collected.

These six tools are designed to be read as one chain, not six separate numbers:

LTV:CAC → CAC Payback → Quick Ratio → MRR → Churn → Runway

Each tool in the chain is a pure function of the ones before it, which is why the six share one formula module and one set of benchmark bands — the same inputs on different pages cannot disagree here.

Maintained by The SaaS Metrics Calculators Editorial Team

Maintained by the site’s editors, with every formula unit-tested and every benchmark traced to a published source

Formulas and benchmarks last reviewed October 2026.

This page is educational. Every figure is computed in your browser from the inputs you supply, and nothing is checked against your own accounts — treat results as a planning aid, not as financial advice.