NPS Calculator
Estimate your retirement corpus, lump sum and illustrative monthly pension.
Your NPS accumulation
Corpus growth is separate from pension income. The monthly pension estimate depends on your annuity allocation and illustrative annuity rate.
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Calculation methodology reviewed 20 September 2026. Estimates depend on the stated scope and your inputs.
Estimate your NPS corpus, lump sum and monthly pension
Most NPS planning starts with one of two questions: what could my monthly contribution become, or how much should I invest for a target pension? The calculator answers either question with the same core inputs, then separates the projected corpus into lump sum, annuity purchase and estimated pension. Existing savings, yearly step-up, annuity allocation, annuity rate and inflation stay optional.
Worked example
With no opening balance, Rs 10,000 contributed each month for 30 years at zero return and no contribution increases produces Rs 36 lakh. Allocating 20% to an annuity gives a purchase amount of Rs 7.2 lakh. At an illustrative 6% annuity rate, that corresponds to Rs 3,600 monthly before tax and leaves Rs 28.8 lakh outside the annuity. With market returns, the same fields show how much of the final corpus comes from investment growth rather than contributions.
Formula and calculation method
Monthly growth factor = (1 + annual return)^(1/12); next balance = (balance + monthly contribution) x monthly growth factorThe return input is an effective annual rate. Contributions arrive at the beginning of each month, and any annual step-up starts after twelve deposits. Intermediate balances are not rounded. Pension equals annuity corpus multiplied by the annual annuity rate, divided by twelve. The required-investment mode accepts a pension target either in rupees at retirement or in today's purchasing power. Only today's-money targets are increased by inflation. The required starting monthly contribution accounts for existing corpus, growth and annual step-up.
Interpretation and limitations
Quick estimates use flat contributions, no opening corpus and no step-up. For normal-exit modelling, the default minimum annuity allocation is 20% for All Citizen and Corporate subscribers and 40% for Government subscribers. Pension uses an explicitly displayed illustrative annual annuity rate, while inflation affects only the today's-money comparison and target. Advanced options allow a higher annuity allocation and custom assumptions. Special small-corpus withdrawal options, premature exit, death benefits, systematic lump-sum withdrawal, scheduled unit redemption and tax treatment are not modelled. Insurer quotes depend on age, annuity option and prevailing rates.
Reference: PFRDA: NPS exit and withdrawal amendment regulations, 2025.
NPS Calculator: Frequently Asked Questions
What is the difference between NPS corpus and monthly pension?
The corpus is the projected balance accumulated by exit. An annuity allocation uses part of that balance to purchase a pension product; the estimated monthly pension then depends on the illustrative annuity rate. The remaining allocation is shown separately as lump sum.
Why are the normal-exit annuity assumptions 20% and 40%?
For the standard normal-exit scenario modeled here, All Citizen and Corporate use a 20% minimum and Government uses 40%. These are not universal rules for every withdrawal: special small-corpus and other exit provisions require separate assessment.
Can I allocate more of my NPS corpus to an annuity?
Yes. A larger allocation increases the amount used for the pension estimate and reduces the lump sum, with all other assumptions unchanged. The tool prevents an allocation below its selected model's normal-exit minimum.
What is the difference between an NPS return and an annuity rate?
The investment-return assumption grows the account before exit. The annuity rate estimates income from the portion used to buy an annuity afterward. They describe different stages and should not be treated as interchangeable or guaranteed rates.
Does this NPS calculator cover premature exit or Tier II withdrawals?
No. It models a standard normal-exit planning scenario, not eligibility for early withdrawal, Tier II access, death benefits, small-corpus exceptions or systematic withdrawal alternatives. Confirm the applicable exit conditions separately.
More questions (6)
How much NPS pension can I get from my contribution?
Enter current age, monthly contribution, expected return and exit age. The calculator projects the retirement corpus, applies your annuity percentage and annuity rate, then displays the estimated monthly pension before tax.
Is the projected NPS return guaranteed?
No. The return is a constant planning assumption, not a forecast or a guaranteed NPS yield. Change the expected return to compare outcomes. Advanced contribution scenarios keep the selected return fixed.
Why does monthly pension look smaller after inflation?
The inflation-adjusted figure discounts the first projected pension payment back to today. It measures purchasing power at retirement; it does not assume the pension rises with inflation afterward.
Can I use an existing NPS account?
Yes. Enter its current market value as the opening corpus. Earlier contributions and their historical gains are not reconstructed; the growth shown starts from that valuation.
How much should I invest for a target NPS pension?
Choose How much should I invest, enter the target monthly pension and select today's money or the amount at retirement. The calculator estimates the required starting monthly contribution using your ages, expected return and model. Optional existing corpus, annual step-up, annuity and inflation assumptions are applied only when you open Advanced options.
Does the annuity allocation mean the lump sum is tax-free?
No. The allocation is a cash-flow split before tax. Check the tax treatment applicable at exit separately, especially when withdrawing more than 60%.