Free tool
How long will my money last?
Enter what you have, what you spend each month and what comes in. See how many months your money lasts.
Turn on JavaScript to use this calculator. The boxes are shown below, and the answer appears when the script runs.
Your money now
Costs each month
Rent, tools, salaries, your own pay: everything you pay every month. Add or remove lines.
Money coming in
Both boxes are optional.
Your numbers stay on your device.
How to use it
- Enter the money you have now.
- List what you pay each month, one line per cost.
- If money comes in, enter it, and how fast it grows if you know.
- Press Work it out. The answer and a small chart appear below the button.
One-off costs, such as setting up a company, belong in the startup budget.
Questions about this calculator
How is the number of months worked out?
Month by month, your income is added to your money and your costs are taken away. Income can grow by the percentage you enter. The count stops at 120 months.
What counts as a monthly cost?
Anything you pay every month to keep going: rent, tools and software, insurance, salaries and your own pay. Costs you pay once belong in the startup budget.
Does it work in my currency?
The currency choice changes only the symbol. No exchange rate is used, so enter every amount in the same currency.
Is the answer a forecast?
No. It is a simple sum on the numbers you enter. Real months differ, so work it out again when your numbers change.
Start with your idea.
Say it the way you would tell a friend. The AI takes it from there.