The concept
What this models
The National Pension System is a market-linked retirement account. This calculator estimates only the accumulation phase — the balance you might build by a target year — under a constant assumed annual return.
It does not model the mandatory annuitization of a portion of the corpus at exit, annuity payout rates, fund manager or asset-allocation choices, or NPS-specific tax treatment.
The method
How to calculate estimated accumulated value
The current balance and monthly contributions are each compounded monthly at the assumed rate using a standard future-value formula, the same convention used for the site's general retirement calculator.
B is the current balance, C is the monthly contribution, r is the monthly assumed rate and n is the number of months.
Worked example
NPS Calculator example
Starting from a ₹2,00,000 balance and contributing ₹5,000 a month at an assumed 9% annual return for 25 years produces an illustrative accumulated value at the end of that period.
This example explains the method. It does not recommend a financial action or predict an outcome.
Frequently asked
NPS Calculator questions
Does this include the mandatory annuity purchase at retirement?
No. NPS rules typically require using part of the corpus to buy an annuity at exit; this calculator estimates only the accumulated corpus, not the resulting pension income.
Is 9% a guaranteed NPS return?
No. NPS returns are market-linked and vary by the fund and asset allocation chosen. 9% is only a starting assumption.
Does this model NPS tax benefits?
No. Contribution and withdrawal tax treatment is not modelled here.