How to actually tell if you can afford to quit your job

Most advice on this question is either useless (“follow your passion”) or quietly dishonest (“just have six months saved” — six months of what, exactly, and where did six come from?). This is the version that does the actual arithmetic, names the costs people forget, and is honest about the part no spreadsheet can answer.

A note up front: the money mechanics here — COBRA, the ACA marketplace, severance, unemployment — are US-specific. The reasoning applies anywhere, but the numbers and rules won’t if you’re outside the US.

This is not financial advice. It’s the math and the questions, laid out so you can do your own thinking instead of looping.

The number that actually matters: runway, not “savings”

“Do I have enough saved” is the wrong question because it has no unit. The right question has a unit, and it’s months.

Runway = the cash you’re genuinely willing to spend ÷ what you spend each month.

That’s it. Everything else in this article is about getting those two numbers honest, because the formula is only as good as its inputs — and almost everyone gets both inputs wrong in the optimistic direction.

If you have $24,000 you’d actually live on and your real monthly spend is $4,000, your runway is six months. Not “about six.” Six. The precision matters because the next move is to decide whether six is enough for your specific situation — and that answer is very different for a single person in a strong job market than for someone supporting three people in a weak one.

Getting the savings number honest

The instinct is to count everything. Don’t. Three corrections, each of which shortens the number — which is the point.

Don’t count retirement accounts. A 401(k) or IRA you’d raid is not runway; it’s a future you’re spending now, usually with a penalty and a tax bill that makes the real available amount far smaller than the balance. If touching it is genuinely on the table, count only the after-penalty, after-tax amount — and notice that you’re funding a job decision by making a retirement decision. Those should be two separate conversations, not one.

Don’t count money that’s already promised. A tax bill due in March, a security deposit you’ll need, a car repair you’ve been deferring — that money is spent, it just hasn’t left yet. Subtract it.

Do count it as “money I’m willing to burn,” not “money I have.” There’s a psychological difference between a number you could spend and a number you’ve decided you’re willing to watch go to zero. The honest runway uses the second one. If the thought of that account hitting $2,000 makes you feel sick, then your real willing-to-spend number is “down to $2,000,” not “down to zero” — so use the smaller figure. Runway built on money you’d panic before actually spending isn’t runway.

Getting the expenses number honest — and the part nobody includes

Most people estimate monthly expenses from memory, which produces a number roughly 20–30% below reality because memory edits out the irregular stuff: the annual insurance premium, the dentist, the wedding you’re invited to, the thing that breaks.

Pull three months of actual statements. Add up everything. Divide by three. That’s your real number, and it will be higher than your guess. Use the real one — planning a life decision on the optimistic figure is how runway estimates fail in month four.

Then add the line almost every “can I afford to quit” calculation omits entirely:

Health insurance — the gap that surprises people

In the US, employer coverage usually ends at the end of your final month or that day, depending on the employer. After that you have a few options, and all of them cost real money that your current paycheck has been hiding from you:

COBRA lets you keep your exact employer plan, but you now pay the full premium — your share plus the part your employer was silently covering, often plus a small admin fee. For many people that’s $500–$700/month for an individual and well over $1,500 for a family. People are routinely shocked by this number because they never saw the employer’s share on a paystub.
The ACA marketplace (healthcare.gov or your state exchange) is often cheaper than COBRA, and losing job coverage triggers a Special Enrollment Period so you don’t have to wait for open enrollment. Subsidies are income-based — and your income may be about to drop, which can make marketplace coverage dramatically cheaper than it looks while you’re still employed. This is worth pricing before you quit, not after.
Going uninsured is the option people fall into by accident rather than choose. One ER visit can erase a year of runway. If nothing else in this article sticks, let it be this: price your health-insurance gap as a real monthly line before you decide, not as a problem you’ll solve later.

Whatever the figure is, it goes into monthly expenses. For a lot of people it’s the single biggest hidden cost of leaving, and leaving it out can turn a “comfortable” runway into a tight one on its own.

What you might still have coming in

Runway extends if money still arrives. Be conservative here — optimism in this column is where plans break.

Severance, if any, is real but think about how you’ll treat it. Spread monthly, it extends runway. Taken as a lump sum and mentally filed as “a cushion,” it tends to evaporate. Also: severance can affect unemployment timing in some states, and it’s taxable. Count the after-tax figure.

Unemployment may apply — but generally not if you quit voluntarily without good cause. The rules are state-specific and the “good cause” definition is narrower than people assume. Don’t pencil this in as guaranteed runway; for most voluntary quits it isn’t there.

Freelance or part-time income is the most over-estimated number in this entire exercise. The honest move is to assume it’s lower and slower to arrive than you expect, because it almost always is. If you have actual signed work, count that. “I could probably pick up clients” is not income; it’s a hope, and hope has a zero in the runway formula.

The honest version of the income line is usually closer to zero than feels comfortable. Use the uncomfortable number.

So how many months is “enough”?

There’s no universal answer, and anyone who gives you one is selling something. But here’s an honest way to think about the floor instead of a fake rule:

The minimum runway you want is long enough to find the next thing without the search itself being driven by panic — because a job hunt run on fumes produces worse decisions and worse offers, which is the opposite of what leaving was supposed to buy you.

That length depends on three things you actually know:

How hard re-hiring is for you specifically. A senior person in a deep market is not in the same situation as a career-changer in a thin one. Be honest about which you are. If you don’t know, assume longer.
How many people the runway has to cover. Supporting only yourself, a tighter runway is a recoverable mistake. Supporting others, the same number is a different kind of risk, and the margin you’d want is wider — meaningfully wider, not symbolically.
Whether you have a real fallback that isn’t the runway — family you could genuinely move in with, a partner’s income that covers the floor, a standing job offer. A true fallback changes the math. A vague one (“my parents would probably help”) is not a fallback; it’s the freelance-income mistake again, in a different costume.

A reasonable way to hold it: if you support only yourself and could plausibly be re-hired in your field, something in the range of six months of honest runway is a defensible floor. If others depend on you, or the market for you is genuinely hard, the defensible floor moves up toward nine-plus — not because nine is magic, but because the cost of being wrong is higher and the search takes longer than people plan for. These are floors for thinking, not guarantees. Your situation can argue for more.

The trap: the money question is often standing in for a different one

Here is the thing most articles won’t say.

A large fraction of people asking “can I afford to quit” have the runway. What they don’t have is permission — from themselves — to leave a situation that isn’t an emergency but is quietly costing them. The money question is easier to ask than “is this job worth what it’s doing to me,” so it gets asked instead, on a loop, and never resolves, because the answer was never really about the money.

If you run honest numbers and the runway is fine, and you still feel stuck, that’s worth noticing. The blocker isn’t financial. It’s that “I can’t afford to” is a more socially acceptable sentence than “I want to leave and I’m allowed to,” and the calculator can’t give you the second one. No tool can. That part is yours.

The reverse trap also exists: a job that is genuinely damaging your health or relationships is a real cost, even though it never shows up in a runway figure. A spreadsheet that says “you can’t afford to leave” is answering a narrower question than the one your body might be asking. The number is a constraint to plan around, not a verdict that overrides everything else.

A short, honest checklist

Before you decide, you should be able to answer these with actual numbers, not feelings:

What’s my real willing-to-spend cash, after subtracting money that’s already promised and excluding retirement accounts?
What’s my real monthly spend, from three months of statements, not memory?
What will health insurance actually cost me per month after coverage ends — priced from the ACA marketplace and COBRA, not guessed?
What income, if any, is genuinely guaranteed — signed, not hoped?
Given all that, how many months of honest runway do I have — and is that enough for my dependents and my market, not in the abstract?
If the runway is fine and I still feel I can’t go, what is the real blocker — and is it actually financial?

If you can answer all six honestly, you’ve done more rigorous thinking about this than the vast majority of people who quit, and the vast majority who stay.

This article explains the math and the questions; it isn’t financial, career, or medical advice, and US rules change. If work is seriously affecting your health, talking to a person you trust or a professional is worth more than any article or tool. The calculator on the homepage will do the runway arithmetic with your own numbers — it makes no prediction and assigns no score, because an honest tool can’t put a real percentage on a life.