Calculator
What the NPS Calculator does
NPS Calculator: calculates Total Corpus, Total Invested and Gains from Monthly Contribution, Expected Return and Years to Retirement. Example: monthly contribution 5000 ₹, expected return 10 % p.a. and years to retirement 25 gives total corpus ₹66,89,451.74.
Supply Monthly Contribution, Expected Return, Years to Retirement and Annuity Purchase % and you get Total Corpus, Total Invested and Gains back. Each change is reflected immediately, which suits quick what-if comparisons.
A quote sounds reasonable until you total the interest over the full term. The NPS Calculator exists to take that particular chore off your hands.
No sign-up, no data collection, no processing queue, just code running locally.
The rest of this page documents each field, the method, and a worked example built from the values the NPS calculator loads by default.
What do the NPS Calculator fields mean?
The NPS Calculator uses 5 inputs. Every box starts with a working value, so there is a real result on screen before you touch anything.
| Field | What to enter | Default |
|---|---|---|
| Monthly Contribution | measured in ₹; accepts 500 to 500000 | 5000 |
| Expected Return | measured in % p.a.; accepts 1 to 15 | 10 |
| Years to Retirement | accepts 1 to 40 | 25 |
| Annuity Purchase % | accepts 40 to 100 | 40 |
| Annuity Rate % p.a. | accepts 1 to 12 | 6 |
How does the NPS Calculator work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
The guard clauses run before the formula does, which is why mistakes surface next to the field.
Worked example
These are the values the NPS Calculator loads by default, and the result it produces from them. The figures are the tool’s live defaults and its live output, so you can reproduce them exactly.
| Monthly Contribution | 5000 ₹ |
|---|---|
| Expected Return | 10 % p.a. |
| Years to Retirement | 25 |
| Annuity Purchase % | 40 |
| Annuity Rate % p.a. | 6 |
| Total Corpus | ₹66,89,451.74 |
|---|---|
| Total Invested | ₹15,00,000.00 |
| Gains | ₹51,89,451.74 |
| Lumpsum Withdrawal | ₹40,13,671.04 |
| Used for Annuity | ₹26,75,780.70 |
| Est. Monthly Pension | ₹13,378.90 |
Read next: Section 80C: How the ₹1.5 Lakh Deduction Really Works
How to use it
- Put Monthly Contribution in ₹ (500 to 500000).
- Key in Expected Return in % p.a. (1 to 15).
- Fill in Years to Retirement (1 to 40).
- Type Annuity Purchase % (40 to 100).
- Enter Annuity Rate % p.a. (1 to 12).
- The tool reacts immediately rather than waiting for you to finish the form.
- The results panel then shows Total Corpus, Total Invested, Gains, Lumpsum Withdrawal, Used for Annuity and Est. Monthly Pension.
- The link encodes your inputs, so saving it is enough to reproduce the result later.
What this tool does not do
- Lender rounding rules differ, so the final figure on your statement may differ by a small amount.
- Rates are treated as fixed for the whole term; a floating rate will change the outcome.
- The method is fixed. There is no option to substitute your own formula.
- Read the field labels once before trusting the answer; they specify the expected unit.
Frequently asked questions
Enter Monthly Contribution in ₹ and Expected Return in % p.a.. Units are printed on the form itself. Match them and no manual conversion is needed.
Monthly Contribution accepts 500 to 500000 ₹. Values outside that range are rejected with a message naming the field, rather than producing something that looks valid but is not.
With the values loaded when the page opens, total corpus comes out as ₹66,89,451.74. That number tracks the inputs, so a small edit shows its sensitivity immediately.
Nothing is stored. The page has no back end to send data to, and holds your input only in memory.
Free, and there is no upsell. The whole tool is the free version.
Exact for the inputs given. Real quotes differ because lenders round differently, charge fees the formula never sees, and price by credit profile rather than by list rate.