Calculator
Career change runway calculator
This is for anyone weighing a change that may mean a stretch with less income, such as retraining, a lower-paid first role or a gap between jobs. It turns your own numbers into one figure: how many months your savings can cover. It uses nothing but what you type, and nothing leaves your device.
Worked example (shown when scripts are off): with 12,000 in usable savings and a monthly draw of 3,000, the runway is 12,000 divided by 3,000, which is 4 months. If you expect a 6-month gap, you are 2 months short. These example numbers are only to show the arithmetic, not a suggestion of what you need.
Before you decide
A runway number is only as good as the figures behind it. Use your real bills, add the irregular ones (insurance, car repairs, annual fees), and be honest about how long a search or a retraining program usually takes in your field. This tool is general information, not financial advice. For decisions about debt, retirement accounts, taxes or benefits, talk to a licensed adviser or a nonprofit credit counselor.
How the calculator works
The rule is plain division. First it subtracts your one-time costs from your savings to get usable savings. Then it subtracts any income that keeps coming in from your monthly expenses to get your monthly draw, which is how much of your savings disappears each month. Runway in months is usable savings divided by the monthly draw.
In symbols: usable = savings minus one-time costs (never below zero); draw = expenses minus continuing income (never below zero); runway = usable divided by draw. If the draw is zero, savings are not being used up and no runway figure applies.
To compare the runway with your plan, it also works out the total you would need: draw times the months you expect to be short of income, plus the one-time costs. The difference between that and your savings is shown as a surplus or a shortfall.
Worked example
Suppose someone has 20,000 saved, expects 1,500 in one-time course and exam costs, spends 2,500 a month and will keep 500 a month from part-time work. Usable savings are 18,500. The monthly draw is 2,000. Runway is 18,500 divided by 2,000, which is 9.25 months. For a planned 6-month gap, the total needed is 12,000 plus 1,500, which is 13,500, so there is 6,500 left over. The numbers are invented purely to show the steps; use your own.
What goes in each box
- Savings you can use. Count money you could spend without penalty or hardship. Many people keep a separate emergency reserve untouched; if so, leave it out here. Retirement accounts often carry taxes and penalties on early withdrawal, so ask a licensed adviser before counting them.
- One-time costs. Course or exam fees, licensing fees, equipment, relocation. Get quotes rather than guessing.
- Monthly expenses. Total your real essentials from recent statements, plus health coverage if your employer pays for it now.
- Monthly income that continues. Only count income you can rely on during the whole gap. Leave out job offers you hope for.
- Months short of full income. Your best estimate for how long it takes to retrain, search and start. Searches often run longer than hoped, so it is worth running the calculator with a longer gap as well.
Limits of this tool
It treats expenses and income as steady, ignores interest on savings and inflation, and does not model taxes, employer benefits, unemployment benefits, severance or a partner's income unless you enter them yourself. It also says nothing about what a new role will pay, and nobody can promise that. If you cannot tell how long a transition will take, the articles on testing a change first show how to gather evidence before you give up income.
Where this comes from
The arithmetic is the standard way personal finance education describes how long savings last: savings divided by the monthly shortfall. We checked the emergency savings material from the Consumer Financial Protection Bureau, which frames savings as a cushion for unexpected expenses and lost income and encourages people to build one in small steps; it does not set a single target for everyone, and neither does this tool. The extra steps for one-time costs and the planned gap are simple extensions of the same division.