How much runway do you actually need before leaving a tech job?

The question arrives in various forms. Six months? A year? "Enough to not panic"? Most advice lands somewhere between a number pulled from thin air and a vague warning about not leaving before you're ready. Neither is particularly useful.

Here's what tends to be true after talking to a lot of people who made the jump at different stages of financial preparation: the runway question is actually two separate questions that most people are conflating. The first is financial — how much money do you need so that the early months of transition don't force you back into a panicked bad decision. The second is psychological — how much cushion do you need to make good, patient decisions rather than fear-driven ones. These numbers are related but not identical. Understanding the difference matters quite a bit.

The financial runway: what the numbers actually mean

When people say "six months of expenses," they're usually referring to a fairly minimal interpretation: six months before you'd genuinely run out of money and default on the basics. Food, rent, utilities, loan payments, health coverage.

That number is a floor, not a target.

The more useful calculation is what I'd call your decision runway — the amount of time you need before the pressure of depletion starts distorting your judgement. Most people report that this kicked in somewhere between months four and seven of transition, even with reserves they'd thought were adequate. The pressure of watching savings drop creates a specific kind of cognitive narrowing. You start making decisions from scarcity rather than from clarity. You take the first semi-reasonable thing that comes along because not taking it feels reckless.

You want enough runway that when the semi-reasonable thing appears, you're able to evaluate it calmly rather than grab it with both hands out of fear.

The factors that change the calculation

The six-months-of-expenses figure assumes a stable baseline of expenses, no income during transition, a reasonably fast path to something new, and no unexpected costs. All four of those assumptions tend to be wrong in practice.

Dependants significantly change the equation. If your income is the primary support for a household with children, a partner out of work, or elderly parents, the runway you need isn't just longer — the type of risk you're taking is categorically different. You're not just managing your own scarcity; you're managing other people's. Most people underestimate how much this affects decision quality when pressure builds.

Health coverage is routinely underplanned for. This is the one I hear about most often, always retrospectively. If you're leaving a company that provided employer-sponsored health insurance, the cost of replacing it can be genuinely shocking — and it hits immediately, on day one. The calculation has to include this from the start, not as an afterthought when you're doing the maths at the kitchen table the week before you leave.

Your lifestyle will compress, but probably not as much as you think. A common piece of advice is that you'll naturally spend less once you've left — fewer lunches out, no expensive commuting costs, less unconscious spending to cope with a job that's making you miserable. This is partially true. The compensatory spending does reduce. But the lifestyle expectations built over years of a good tech salary tend to be stickier than anticipated. Build your runway calculation on your actual current expenses, not the optimistic compressed version you intend to live on.

Income during transition is likely but variable. Most people manage some income during the transition period — freelance work, consulting, a part-time arrangement. Don't build your primary calculation around this income, but do account for it as a realistic moderator of your burn rate. The risk is anchoring on an optimistic income projection and having it fail to materialise in the months when you most need it to.

The psychological runway question

This is the factor that most financial runway calculators miss entirely.

There's a version of transition stress that's purely logistical — can I pay my bills? — and a version that's existential — am I making a terrible mistake? These are different kinds of stress, they peak at different times, and they require different amounts of cushion to navigate well.

The logistical stress is fairly predictable and calculable. The existential stress is not. It tends to peak somewhere between months three and seven for most people — after the initial relief of leaving has faded and before there's enough evidence that the new path is actually working. This is the doubt phase, and it arrives for almost everyone regardless of how right the decision was. What varies is how it's navigated.

People who feel adequately resourced — who don't feel the immediate pressure of running out — tend to make much better decisions in the doubt phase. They're more likely to explore broadly rather than grabbing the nearest familiar thing. They're more likely to be honest with potential partners, clients, or employers rather than desperate. They're more likely to give something time to develop before abandoning it.

The psychological cushion is real. It doesn't show up in a spreadsheet, but it matters as much as the financial number — possibly more, because decisions made in the doubt phase have long-lasting consequences.

What tends to go wrong with runway planning

People plan for their best-case scenario timeline. They think: I'll leave in April, spend three months figuring things out, have something lined up by July. Then July arrives and they're still figuring it out, the runway is now at four months, and the decisions get progressively worse under pressure. Build your plan around a more realistic median timeline, not the optimistic one.

People forget to account for the re-entry cost. Even if your transition eventually returns you to employment, there may be a period of interviewing, notice periods, onboarding, delayed first paycheques. These costs come at the end of the runway, not the beginning. Factor them in before you finalize your calculation, not after you've already handed in your notice.

People count assets that aren't liquid. Unvested options, shares in illiquid start-ups, property with significant equity but no accessible cash — these have value but they are not runway. Runway is money you can spend without a transaction, a waiting period, or a risk of it being worth significantly less when you need it most.

The part nobody mentions

It's not just about how much you have. It's about how clear you are on where you're going.

A clear destination — a specific type of role in a specific sector, with relationships in that world — compresses the runway you need. A vague destination — I'm not sure yet, I just know I need to leave — expands it significantly. Clarity, particularly relational clarity (people who know your work and can help you into what comes next), is genuinely worth six months of financial runway.

This isn't an argument for staying until you know exactly what's next. Sometimes leaving is what creates the space to figure that out. But it is an argument for being honest with yourself about where you sit on the clarity spectrum, and building your runway accordingly rather than pretending the vagueness isn't a risk factor.

What "enough" actually means

There's no universal correct answer to how much runway you need. What I can say is this: almost everyone who has done this successfully has one piece of advice about runway, and it isn't "you'll need less than you think." It's almost always some version of "I wish I'd had a bit more."

More runway means more patience. More patience means better decisions. Better decisions mean less likelihood of ending up in a role that's just as miserable as the one you left, because you couldn't afford to wait for the right thing.

The goal isn't to eliminate uncertainty before you leave. That's not possible, and waiting for it will keep you where you are indefinitely. The goal is to enter the uncertainty with enough cushion that you can navigate it without your nervous system making the decisions for you.

If you're working through the financial picture for your own situation — what a transition might actually cost, what income you might realistically generate, what the real numbers look like — the career pivot track on the Start Here page has more on what the planning process actually looks like for people who've been through it.