Calculating your future balance is straightforward once you know the Savings 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 Savings Calculator.
What is Savings?
The Savings calculation tells you your future balance from a few simple inputs. The figure you are solving for here is the future balance, expressed in INR.
The Savings formula
The core formula is:
Future balance = Initial deposit × (1 + Annual interest rate ÷ 100 ÷ 12)^(Time period × 12) + Monthly contribution × ((1 + Annual interest rate ÷ 100 ÷ 12)^(Time period × 12) - 1) ÷ (Annual interest rate ÷ 100 ÷ 12)Here is what each input means:
- Initial deposit — a money amount. Example: ₹1,00,000.
- Monthly contribution — a money amount. Example: ₹5,000.
- Annual interest rate — a percentage, such as an annual rate. Example: 8%.
- Time period — a value you set on the slider. Example: 10 years.
How to calculate it step by step
- Write down the initial deposit (for example, ₹1,00,000).
- Write down the monthly contribution (for example, ₹5,000).
- Write down the annual interest rate (for example, 8%).
- Note the time period (for example, 10 years).
- Apply the formula above to get your future balance.
- Double-check the result with the Savings Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Initial deposit | ₹1,00,000 |
| Monthly contribution | ₹5,000 |
| Annual interest rate | 8% |
| Time period | 10 years |
| Future balance | ₹11,36,694 |
| Total deposited | ₹7,00,000 |
| Interest earned | ₹4,36,694 |
With initial deposit of ₹1,00,000, monthly contribution of ₹5,000, annual interest rate of 8% and time period of 10 years, the future balance works out to ₹11,36,694.
Example 2
With initial deposit of ₹2,00,000, monthly contribution of ₹5,000, annual interest rate of 8% and time period of 10 years, the future balance works out to ₹13,58,658.
| Result | Value |
|---|---|
| Future balance | ₹13,58,658 |
| Total deposited | ₹8,00,000 |
| Interest earned | ₹5,58,658 |
Example 3
With initial deposit of ₹50,000, monthly contribution of ₹5,000, annual interest rate of 8% and time period of 10 years, the future balance works out to ₹10,25,712.
| Result | Value |
|---|---|
| Future balance | ₹10,25,712 |
| Total deposited | ₹6,50,000 |
| Interest earned | ₹3,75,712 |
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 Savings Calculator does it instantly, for free, with the formula and a worked example built in.
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