Guide · Financial readiness

How long will your savings last after quitting?

The runway math

Runway is the simplest important number in any quit plan: spendable savings divided by monthly burn. If you have 20,000 you are willing to spend and your real monthly burn is 2,500, your runway is eight months. If reliable income still covers part of the gap, subtract it from expenses first, that smaller burn is what divides into your savings. The runway calculator does the arithmetic and lets you stress-test cutting spending or adding income with two sliders.

Getting your burn rate honest

The division is trivial. The honesty is not. Your burn rate has to reflect the life you will actually live after quitting, which is rarely the budget in your head. Include housing, food, transport, utilities, insurance, debt minimums, and family costs, then add what your employer currently pays for you, health insurance above all in the US, and a twelfth of last year's irregular costs like car maintenance and renewals. Build it line by line in the budget planner and the runway figure stops being a guess.

Why estimates run optimistic

People consistently overestimate their runway, and almost always for the same four reasons:

• Forgotten employer costs. Health cover, income protection, a subsidised phone or commute become yours to fund, and they are easy to leave out.
• Counting hoped-for income. Freelance work you plan to find is not income yet. Treating projections as guaranteed is the most common runway mistake.
• Ignoring irregular bills. Annual renewals, repairs, and the holiday you will still take do not show up in a monthly budget until they arrive.
• A lean budget you have never lived. A theoretical cut that looks fine on a spreadsheet tends to break in week three of real life.

Each of these shortens the real runway below the estimate. Account for all four and your number stops flattering you, which is exactly what you want before a no-income period.

A worked example

Marcus thinks he has a year of runway: 24,000 saved, and he reckons he spends about 2,000 a month. But his honest budget tells a different story. Health cover he never paid before adds 400, a twelfth of his annual costs adds 250, and the lean grocery figure he assumed is 150 short of what he actually spends. His real burn is closer to 2,800.

At 2,800 a month, 24,000 lasts about 8.6 months, not twelve. That three-and-a-half month gap between the estimate and reality is exactly the kind of surprise you want to have now, on a quiet afternoon, rather than in month nine with no offer in sight.

What counts as a safe runway

There is no universal safe number, but the bands are a useful frame. Under three months is risky for an open-ended exit. Three to six is borderline, workable mainly with a fast market or a signed offer. Six to twelve supports a planned exit. Twelve or more gives genuine room, including for retraining or building income. Where you should sit inside that depends on your dependents, your debt, and how long hiring takes in your field, the same factors covered in how much to save before quitting.

How to make it last longer

Two levers do most of the work: spend less and earn something. A realistic 15% cut to your burn and a modest part-time income can stretch a six-month runway well past a year, because both shrink the monthly gap your savings have to cover. The runway calculator's sliders show the effect instantly, and the side hustle calculator models how a ramping income changes the picture over time. Just remember the rule from above: only income that already exists belongs in the base number; everything else is a scenario.

Frequently asked questions

How do I calculate how long my savings will last?

Divide your spendable savings by your real monthly burn, where burn is your essential expenses minus any reliable monthly income. If you have 20,000 saved and spend 2,500 a month with no income, that is eight months of runway. The runway calculator does this and lets you test cuts and added income.

What is a monthly burn rate?

Your burn rate is the amount your savings shrink each month once your salary stops: essential expenses minus any income that still comes in. It is the single most important number in runway math, and it is usually higher than people expect once forgotten costs like health cover and annual bills are added.

Why do savings run out faster than people expect?

Because the budget used to estimate runway is usually optimistic. People forget the costs an employer absorbed, underestimate irregular annual bills, count hoped-for income as guaranteed, and assume a lean budget they have never actually lived. Each one shortens the real runway below the estimate.

Should I include investments in my runway?

Only money you are genuinely willing and able to spend without penalty counts as runway. Retirement accounts often carry early-withdrawal costs, and volatile investments can fall exactly when you need them. Base your runway on accessible cash, and treat locked or risky money as a separate, last-resort layer.

People also ask

Does runway account for inflation or investment growth?

A simple runway calculation assumes costs hold steady and savings sit still, which keeps it conservative and easy to trust. Over a short gap, interest on cash is small and inflation pushes the true figure slightly lower, so leaving both out rarely changes the decision and errs on the safe side.

How can I make my savings last longer after quitting?

Two levers move it most: spend less and earn something. Cutting your essential burn and adding even modest reliable income both shrink the monthly gap your savings cover. A realistic cut plus part-time income can stretch a six-month runway well past a year.

What is a safe runway before quitting?

Under three months is risky for an open-ended exit, three to six is borderline and workable mainly with a fast market or a signed offer, six to twelve supports a planned exit, and twelve or more gives genuine room. Where you should sit depends on dependents, debt, and how long hiring takes in your field.

Should side income count toward how long my savings last?

Only income that already exists and is reliable should reduce your burn. Projected or ramping freelance income belongs in a scenario, not in the base calculation, because it almost always arrives slower than planned. Pressure-test it separately before relying on it.