Everyday ToolboxHow Long Will My Money Last Calculator
Will your savings outlive you? Enter your current savings, monthly spending, expected investment return and inflation, and this free calculator simulates month by month to tell you exactly how many years your money will last — with a year-by-year balance table, a declining-balance chart, and what-if scenarios. Everything runs in your browser; your numbers never leave your device.
Frequently Asked Questions
How is "how long will my money last" calculated?
The calculator simulates your balance month by month for up to 60 years: each month your balance grows by one-twelfth of the annual return, your spending is increased by monthly inflation, then spending is subtracted and any contribution added. It stops when the balance hits zero — the number of months elapsed is how long your money lasts.
What is a safe withdrawal rate?
The classic rule of thumb is the 4% rule: withdraw about 4% of your savings in the first year of retirement (adjusted for inflation after), and the money has historically lasted 30 years. This calculator lets you test any spending level instead of relying on a rule of thumb.
Does inflation really matter that much?
Yes. At 2.5% annual inflation, something costing $4,000/month today costs about $5,120/month in 10 years and $6,560 in 20 years. Ignoring inflation is the most common reason people overestimate how long their savings will last.
What return should I assume?
Be conservative. A balanced retirement portfolio has historically returned around 5–6% per year after inflation is stripped out — but using 4–5% nominal in your plan leaves a margin of safety. This calculator uses nominal returns and applies inflation to spending separately.
What if I keep contributing while I spend?
Enter your monthly contribution (for example, part-time work income) and the calculator adds it each month. If your contributions plus returns cover your spending, your money can last indefinitely — the calculator will tell you it lasts beyond the 60-year horizon.
Is this financial advice?
No. This is an educational estimating tool, not financial advice. For retirement planning decisions, talk to a qualified financial advisor.