What Is Risk Runway? How It Works and What It's For

Risk Runway is a free calculator that answers one question: if your income stopped today, how long would your money last? You enter two numbers, your liquid savings and your monthly essential expenses, and it returns your survival window in months and days. The formula is a single division. There is no account, no bank connection, and nothing you type is uploaded.

That is the entire product on the surface. When a friend sends someone the link, the two questions that come back are almost always the same: what is the number actually for, and how do I know I can trust it? Both have short answers, and this page is the long version.

What you enter, and what you get back

The calculator asks for two things, and it deliberately does not ask for a third.

• Liquid savings. Cash and money you can actually reach within a few days without a penalty. Not retirement accounts, not home equity, not unvested stock.
• Monthly essential expenses. What it costs to keep a roof, eat, and stay insured. Not your average spending, which is inflated by things you would drop in a pinch.

What it refuses to ask for is the interesting part. No name, no date of birth, no account numbers, no card details, no employer, no address. Those fields do not exist on the page, which is a stronger guarantee than a promise to keep them safe.

The output is a survival window, and then four ways to bend it: what a job loss does to it, what a pay cut does to it, what an unexpected expense does to it, and what happens if you cut your fixed costs instead. The main calculator at riskrunway.app runs the whole thing in ten seconds from two sliders.

The math is one division

Two things about this are worth stating plainly, because they are the reason people trust the number. First, the arithmetic is fixed and deterministic: the same inputs always produce the same output, and you can reproduce every figure on this site with a pocket calculator. Second, no AI model is involved in producing the number. The site does use AI for one optional feature, a purchase-reflection helper where you write out what you are thinking of buying, but that feature is separate from the calculator and it never touches the math.

The complexity people associate with this topic comes almost entirely from arguing about the two inputs, not from the calculation. If you want the full treatment of which assets count as liquid and which do not, that is the formula article.

What the site is for

It is not here to teach budgeting. There are hundreds of tools for tracking what you spent, and this is not one of them. It is not here to sell you a financial product, either: there are no credit offers, no brokerage referrals, no affiliate links dressed up as recommendations, and no advertising scripts on the site.

The purpose is narrower and more specific. It exists to turn one class of decision from a feeling into a number.

Almost every consequential career decision gets made with a vague sense of whether you can afford it. Should I take the buyout? Can I hold out for a better offer, or do I need to accept this one? Is this the month I finally leave, or do I need one more year of saving first? Is a pay cut survivable if it buys me a job I do not hate? People answer questions like these with dread, or optimism, or whatever mood they happen to be in on a Tuesday. A runway figure answers them with a countdown, and a countdown behaves differently from a feeling. It has an end date. It tells you when the answer changes.

That is the whole reason the site refuses to give advice. A number is honest about being a number. The moment a calculator starts telling you whether to quit, it has stopped being arithmetic and started pretending to be something it is not licensed to be.

There is one more piece of the purpose that is still ahead. The long-run direction of this project is a monitor rather than a report: something that keeps watching the number and warns you when it drops, instead of something you calculate once and forget. That product does not exist yet. The Runway Monitor page collects interest, and it gets built if enough people ask for it.

What it is not

One related thing people ask about: PauseCart is the project's companion browser extension, which pauses at checkout and shows what a purchase costs in daily wages. It is in private testing and is not publicly available yet.

Where your numbers go

This is the part worth reading twice, because "we care about privacy" is cheap and specific commitments are not.

There is one honest exception to "nothing leaves your browser", and it is worth stating rather than burying: if you ask Risk Runway to email you a report, the figures needed to build that report are sent to the server once, used to generate the email, and then discarded. They are not written to storage. If you never request an emailed report, your figures never leave the device at all. The full detail is on the privacy page.

What is free, and what costs money

If someone sent you the link

Start with the calculator and your own two numbers. It takes ten seconds and asks for nothing, which makes it a safe place to begin. If the answer is comfortable, you are done, and you can close the tab. If it is shorter than you expected, the articles here are the follow-up: what severance really covers, what health insurance costs between jobs, how long a job search actually takes in your age bracket, and what a single income does to the arithmetic. The Latte Factor calculator and the purchase checker handle the other direction, where a habit or a single purchase changes the number.

Frequently asked questions