Free NPS Calculator: Pension Corpus and Annuity
Calculate NPS maturity free — and understand the annuity rule that determines how much you actually receive.
NPS calculators show you a corpus figure, and that number is misleading on its own. A substantial portion of your NPS corpus cannot be withdrawn as a lump sum at retirement — it must be used to purchase an annuity. So the headline corpus is not money you receive; part of it converts into a monthly pension at whatever annuity rates prevail decades from now.
Why a free NPS calculator matters more in India
This makes NPS harder to project than PPF or a fixed deposit, and the uncertainty sits in a place most calculators do not model. Your final outcome depends on three unknowns: the returns your chosen asset allocation delivers, the annuity rate available at retirement, and the tax treatment applying at that time. A calculator handles the first with an assumption and typically ignores the other two. That is not a reason to avoid NPS, which has genuine tax advantages, but it is a reason to treat single-figure projections with scepticism.
The best free options compared
At a glance
Of the 4 options below, 4 are fully free with no paid tier to upgrade to, and 0 offer a free tier alongside paid plans. That distinction matters more than it first appears: a fully free tool cannot restrict you later, whereas a free tier is a commercial decision that can be revised.
| Tool | Cost | Best for |
|---|---|---|
| NPS Trust calculator | Fully free | Operated by the body overseeing the scheme, making it the natural reference point and… |
| Your NPS point-of-presence portal | Fully free | Uses your actual accumulated corpus and contribution history rather than estimates,… |
| ClearTax and similar calculators | Fully free | Convenient interfaces that usually show the corpus and annuity split explicitly, which… |
| A spreadsheet | Fully free | Useful because it lets you model the annuity portion under several rate assumptions… |
Each option in detail
NPS Trust calculator
✓ FREEOperated by the body overseeing the scheme, making it the natural reference point and free of any distributor's incentive to present the product favourably.
Your NPS point-of-presence portal
✓ FREEUses your actual accumulated corpus and contribution history rather than estimates, which makes the projection meaningfully more accurate than a generic calculator.
ClearTax and similar calculators
✓ FREEConvenient interfaces that usually show the corpus and annuity split explicitly, which is the more informative presentation.
A spreadsheet
✓ FREEUseful because it lets you model the annuity portion under several rate assumptions rather than accepting one. Seeing the range of monthly pension outcomes is more decision-relevant than a single corpus number.
Note on free tiers: limits and features change often. Everything here was checked in July 2026, but confirm current terms on the provider's own site before committing to a workflow. Official guidance: Income Tax Department GST Portal.
How to choose the right one
Use the NPS Trust calculator for a neutral figure, then specifically look at the split between what you can withdraw and what must buy an annuity. Model the annuity at more than one rate — the difference between optimistic and conservative assumptions over a long horizon is large. Verify current withdrawal and tax rules on official sources, as NPS provisions have been amended more than once.
If you are assembling a wider free toolkit, these related guides cover adjacent problems: Free SIP Calculator: Project Mutual Fund Returns, Free Income Tax Calculator India (Old vs New), Free GST Calculator: CGST, SGST and IGST.
Verdict
Any calculator gives a reasonable corpus estimate. The number that matters is the monthly pension it implies, and that depends on annuity rates nobody can predict. Treat NPS projections as a planning range, and confirm current rules on the official portal rather than relying on a calculator's built-in assumptions.
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See all Finance & Tax Calculators →Frequently asked questions
How much of my NPS corpus can I withdraw at retirement?
A portion may be withdrawn as a lump sum and the remainder must be used to purchase an annuity, with the proportions set by regulation. These rules have been revised previously, so check the current position on official sources.
Is NPS better than PPF?
They serve different purposes. PPF offers a government-set, predictable, tax-free return with a defined lock-in. NPS is market-linked with potentially higher returns and an annuity requirement at exit. Many people hold both.
What return should I assume for NPS?
It depends on your asset allocation between equity, corporate bonds and government securities. Equity-heavier allocations have historically returned more with more variability. Model a range rather than a single optimistic figure.
Is the NPS annuity income taxable?
Annuity income is generally taxable as income in the year received, while the lump sum portion has its own treatment. Tax rules change, so confirm the current position before planning around it.