ReckonBoxHow the NPS calculator works
An NPS calculator projects the retirement corpus you build under India's National Pension System, then splits it at 60 into a tax-free lump sum and an annuity that pays a monthly pension. The National Pension System is a market-linked, defined-contribution account: your monthly contribution is invested in equity, corporate bonds, and government securities, and it grows until you retire. Feed the calculator a contribution, a return, and your age, and it shows the corpus, the split, and the pension.
On the defaults, the compounding runs a long way. A Rs 10,000 monthly contribution from age 30 to 60 at a 10% return grows to about Rs 2.28 crore, of which nearly Rs 1.92 crore is market gains on Rs 36 lakh contributed. Keep 40% for the annuity and the tax-free lump sum is about Rs 1.37 crore, with a monthly pension of roughly Rs 45,587 at a 6% annuity rate.
How NPS builds and splits your money
The NPS corpus is the future value of your monthly contributions compounded at the expected return, and at 60 at least 40% of it must buy an annuity while up to 60% comes out as a tax-free lump sum. The accumulation is the same maths as a monthly SIP: each contribution compounds from the month you pay it until you turn 60. Because returns are market-linked, the figure is an estimate that moves with the rate you assume.
The pension comes from the annuity half. Whatever share you set aside, the monthly pension is that annuity corpus times the annuity rate, divided by 12. An annuity corpus of Rs 1 crore at a 6% annuity rate pays about Rs 50,000 a month, so a bigger annuity corpus or a higher annuity rate lifts the pension in direct proportion.
The annuity slider: lump sum or pension
Deciding how much to annuitise is the one real choice NPS gives you at 60, and it is a straight trade. Anything you do not annuitise comes to you as cash, and anything you do annuitise pays a monthly pension for life. Push the annuity share up and the pension grows while the lump sum shrinks.
On the default Rs 2.28 crore corpus, the numbers make the trade concrete. At the 40% minimum, you take Rs 1.37 crore in cash and a Rs 45,587 pension. Move the slider to 80% and the cash drops to about Rs 46 lakh while the pension roughly doubles. The right mix depends on how much upfront money you need against how much guaranteed monthly income you want, which is a personal call the slider lets you test.
A worked example, end to end
Take the defaults and follow the money from a Rs 10,000 monthly contribution.
| What NPS does here | Amount |
|---|---|
| Total invested (30 years) | Rs 36,00,000 |
| Corpus at 60 | Rs 2,27,93,253 |
| Tax-free lump sum (60%) | Rs 1,36,75,952 |
| Annuity corpus (40%) | Rs 91,17,301 |
| Monthly pension (6% annuity) | Rs 45,587 |
| 80CCD tax saved per year (30% slab) | Rs 37,440 |
The gains, nearly Rs 1.92 crore, dwarf the Rs 36 lakh you put in, which is compounding over three decades doing the work. The pension is modest next to the corpus because only 40% funds it, which is exactly why the annuity slider matters.
The tax benefit under 80CCD
NPS carries a tax break that no other 80C option matches: an exclusive Rs 50,000 deduction under Section 80CCD(1B), on top of the Rs 1.5 lakh limit. Your contribution first claims Section 80CCD(1) within the shared Rs 1.5 lakh 80C cap, then the extra Rs 50,000 under 80CCD(1B), so up to Rs 2 lakh of your own contribution is deductible under the old regime.
Salaried subscribers get a third door. Under Section 80CCD(2), an employer's NPS contribution is deductible up to 10% of salary, or 14% for central-government employees and under the new regime, and it sits outside the Rs 2 lakh personal limit. This calculator shows the tax saved on your own contribution at your slab: at 30%, a full Rs 1.5 lakh saves about Rs 46,800 including cess, and the extra Rs 50,000 of 80CCD(1B) adds more.
Withdrawal rules at 60
Three rules govern what you can take out. The baseline, which all government employees follow, is 60% as a tax-free lump sum and at least 40% into the annuity. A recent reform lets a non-government subscriber whose corpus tops Rs 12 lakh withdraw up to 80%, keeping only 20% for the annuity, though the amount above 60% is taxable at slab. And if the corpus is small, up to Rs 5 lakh when you exit before 60 or Rs 8 lakh at 60, you can take the whole thing with no annuity at all.
Timing has some give. The normal exit is 60, but you can defer the withdrawal and keep contributing up to 75, letting the corpus compound longer before you lock in the split.
NPS, EPS, or PPF
NPS sits alongside the other retirement schemes rather than replacing them, and the difference is who controls the money and the return.
| Feature | NPS | EPS pension | PPF |
|---|---|---|---|
| Return | Market-linked (equity and bonds) | Formula-based, from EPF | 7.1% fixed |
| You get | Lump sum plus an annuity pension | A defined monthly pension | A lump sum |
| Extra tax break | Rs 50,000 under 80CCD(1B) | None (part of EPF) | Within 80C |
| Who chooses the mix | You (the annuity slider) | Fixed by the scheme | Not applicable |
NPS gives the most control and the equity upside, at the cost of market risk and a compulsory annuity; the EPS pension calculator covers the defined-benefit pension from your EPF, and the retirement corpus calculator sizes the total you need across all of them.
What this does not promise
The corpus here is an estimate, because NPS returns are market-linked and will not follow the flat rate you enter, and the annuity rate at 60 depends on interest rates and the annuity provider you pick years from now. The withdrawal and tax rules are set by the PFRDA and the government and have changed recently, so confirm the current split and thresholds before you retire. This is a planning tool and not investment advice, so a SEBI-registered adviser can weigh NPS against your other retirement savings. The official NPS Trust calculator is the authority for a formal estimate.
Frequently asked questions
What is an NPS calculator? An NPS calculator estimates the retirement corpus you build under India's National Pension System from your monthly contribution and an expected return, then splits it at 60 into a tax-free lump sum and an annuity that pays a monthly pension. It also shows the 80CCD tax the contribution saves.
How is the NPS pension calculated? The corpus is the future value of your monthly contributions compounded at the expected return to age 60. At least 40% of it buys an annuity, and the monthly pension is that annuity corpus times the annuity rate, divided by 12. An annuity corpus of Rs 1 crore at a 6% annuity rate pays about Rs 50,000 a month.
What is the 40% and 60% rule in NPS? At 60, you can withdraw up to 60% of your NPS corpus as a tax-free lump sum, and at least 40% must be used to buy an annuity that pays a monthly pension. Government employees follow this 60/40 split, and the pension income is taxed at your slab.
Can I withdraw more than 60% from NPS? Under a recent reform, a non-government subscriber whose corpus is above Rs 12 lakh can withdraw up to 80% as a lump sum with only 20% mandatory annuity, though the amount beyond 60% is taxable at your slab. If the corpus is small, up to Rs 5 lakh before 60 or Rs 8 lakh at superannuation, you can take the whole amount with no annuity.
How much tax does NPS save? Your NPS contribution earns a Section 80CCD(1) deduction within the Rs 1.5 lakh 80C limit, plus an exclusive Rs 50,000 under 80CCD(1B), so up to Rs 2 lakh of self-contribution is deductible under the old regime. At the 30% slab, a Rs 1.5 lakh contribution saves about Rs 46,800 including cess, and this calculator shows the figure at your slab.
What return should I assume for NPS? NPS returns are market-linked, since your money is invested in equity, corporate bonds, and government securities, so there is no fixed rate. Long-run NPS returns are often discussed around 9 to 11 percent, and this calculator defaults to 10 percent, which you can change to test a more cautious figure.
What is the difference between Tier I and Tier II in NPS? Tier I is the main retirement account, locked until 60, and it carries the tax benefits, with a minimum of Rs 1,000 a year. Tier II is a voluntary, add-on account with no lock-in that you can withdraw anytime, but it does not get the same tax deduction. This calculator projects a Tier I retirement account.
Is the NPS lump sum taxable? The lump sum you withdraw at 60, up to 60% of the corpus, is fully tax-free under Section 10. The 40% used to buy the annuity is not taxed at purchase, but the monthly pension it pays is taxed as income at your slab in the year you receive it.