Calculating your money lasts (months) is straightforward once you know the How Long Will My Money Last formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the How Long Will My Money Last Calculator.
What is How Long Will My Money Last?
The How Long Will My Money Last calculation tells you your money lasts (months) from a few simple inputs. The figure you are solving for here is the money lasts (months).
The How Long Will My Money Last formula
This calculation combines several inputs through a multi-step method rather than a single one-line formula. Enter the values below and the calculator resolves each step in order. The inputs it needs are:
- Current savings — a money amount. Example: ₹10,00,000.
- Monthly withdrawal — a money amount. Example: ₹10,000.
- Annual return on savings — a percentage, such as an annual rate. Example: 6%.
How to calculate it step by step
- Write down the current savings (for example, ₹10,00,000).
- Write down the monthly withdrawal (for example, ₹10,000).
- Write down the annual return on savings (for example, 6%).
- Apply the formula above to get your money lasts (months).
- Double-check the result with the How Long Will My Money Last Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Current savings | ₹10,00,000 |
| Monthly withdrawal | ₹10,000 |
| Annual return on savings | 6% |
| Money lasts (months) | 139 |
| Money lasts (years) | 11.6 |
With current savings of ₹10,00,000, monthly withdrawal of ₹10,000 and annual return on savings of 6%, the money lasts (months) works out to 139.
Example 3
With current savings of ₹5,00,000, monthly withdrawal of ₹10,000 and annual return on savings of 6%, the money lasts (months) works out to 58.
| Result | Value |
|---|---|
| Money lasts (months) | 58 |
| Money lasts (years) | 4.8 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- Annual rates must be converted to the period you are calculating for (for example, divide an annual rate by 12 for a monthly figure).
Prefer not to do the maths by hand? — the How Long Will My Money Last Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring finance calculators with these tools: SIP Calculator, EMI Calculator, CAGR Calculator, FD Calculator, Effective Annual Rate (EAR) Calculator.