NPS Calculator

The NPS (National Pension System) Calculator projects how much your retirement corpus will grow to based on your monthly contributions, expected investment returns, and the number of years left until retirement. It then estimates your lumpsum withdrawal and the monthly pension you can expect from the mandatory annuity portion.

It is designed for salaried employees, self-employed individuals, and government staff who contribute to NPS, whether voluntarily for the extra Section 80CCD(1B) tax deduction or as part of a mandatory government pension scheme.

NPS contributions are invested and compound monthly. Since deposits are typically made every month, the calculator uses the future value of a growing monthly annuity (deposit at the start of each month):

Corpus = P × [((1 + i)^n − 1) / i] × (1 + i)

• P is your monthly contribution
• i is the expected monthly rate of return (annual rate ÷ 12)
• n is the number of months remaining until retirement

At retirement, current PFRDA rules require at least a portion of the corpus to be used to purchase an annuity (a fixed regular pension), while the remainder can be withdrawn as a tax-free lumpsum. Government employees must annuitize a minimum of 40%, while a 2026 PFRDA reform lets other subscribers annuitize as little as 20%. The calculator lets you set your own annuity split to match your situation.

Arjun, age 30, contributes ₹10,000 every month to his NPS Tier-1 account until he retires at 60 (30 years / 360 months), assuming a long-term expected return of 10% p.a. and choosing to annuitize the minimum 40% of his corpus at an assumed annuity rate of 6.5%.

• Total Invested = ₹10,000 × 360 = ₹36,00,000
• Projected Corpus at 60 ≈ ₹2.28 crore (of which ≈ ₹1.92 crore is investment growth)
• Tax-free Lumpsum (60%) ≈ ₹1.37 crore
• Annuity Corpus (40%) ≈ ₹91.2 lakh, generating an estimated monthly pension of ≈ ₹49,385

Starting early and staying invested is what does the heavy lifting here — Arjun's own contributions make up only about 16% of his final corpus.

• Retirement Readiness: See in one screen whether your current NPS contribution is on track to fund the retirement lifestyle you want.
• Tax Planning: Model the extra ₹50,000 deduction under Section 80CCD(1B), over and above the ₹1.5 lakh Section 80C limit.
• Annuity Trade-off: Adjust the annuity percentage slider to see the direct trade-off between a bigger lumpsum today and a higher monthly pension later.

Practical Tips:

• NPS returns are market-linked (via equity, corporate bond, and government securities schemes), so treat the "expected return" as an estimate, not a guarantee — review your asset allocation periodically as you approach retirement.
• The extra ₹50,000 deduction under Section 80CCD(1B) is only available under the Old Tax Regime; the New Regime does not allow it (except employer contributions under 80CCD(2)).
• Even a small annual step-up in your monthly contribution (say, 5-10% every year in line with salary hikes) can substantially increase your final corpus due to compounding — model this by periodically revisiting the calculator with a higher contribution.

Sources & References

• Pension Fund Regulatory and Development Authority (PFRDA) — NPS Exit and Withdrawal Regulations
• Income Tax Department of India — Section 80CCD and Section 10(12A) provisions