NPS Lump Sum and Annuity: How the Calculator Splits the Corpus

How the calculator allocates a projected NPS corpus, estimates annuity income, and differs from category- and corpus-dependent exit rules.

Published: Published 22 Aug 2026
Updated: Updated 22 Aug 2026
Reading time: 8 min read

Applicable regulation: PFRDA Exits and Withdrawals Regulations, 2015 (last amended 20 July 2026)
Last verified: 22 Aug 2026

This article is for education and general information. See the Financial Disclaimer before using it for an important decision.

The calculator mechanically applies the entered allocation

The annuity corpus equals the projected retirement corpus multiplied by the entered annuity-allocation percentage. The displayed lump-sum allocation is the projected corpus remaining after that annuity amount.

The annual annuity estimate equals the annuity corpus multiplied by the entered assumed annual annuity rate. Dividing that amount by 12 produces the monthly estimate. These calculations do not determine legal eligibility or reproduce an annuity contract.

Engine-derived 20% calculator allocation for the illustrative corpus
Projected corpus	Entered annuity allocation	Lump-sum allocation	Annuity corpus	Annual annuity estimate	Monthly annuity estimate
₹83,92,873.57	20%	₹67,14,298.86	₹16,78,574.71	₹1,00,714.48	₹8,392.87

Actual NPS treatment depends on category, event and corpus

Current PFRDA rules distinguish government and non-government subscribers, normal and premature exits, vesting events, post-60 entry, death and accumulated-pension-wealth bands. Exceptions and alternative payout treatments also apply in specified corpus bands.

For the All Citizen context represented by the current rule set, general normal-exit treatment can permit up to 80% lump sum with at least 20% annuity, while current small- and intermediate-corpus provisions create other options. Premature-exit treatment is different. These facts describe regulatory context, not what the calculator decides for a particular subscriber.

No single allocation is universal

It is inaccurate to say that every NPS subscriber must buy a 40% annuity or that normal NPS exit always means 60% lump sum and 40% annuity. It is equally inaccurate to apply a universal 80%/20% split without identifying the subscriber model, exit event, corpus band and current exceptions.

Selecting 20%, 40%, 75%, 80% or another supported allocation in the calculator changes only the projection. Verify the current regulations and the treatment applicable to the account before interpreting an actual exit.

Start with NPS Explained and then review why the annuity estimate is not a provider quote.

Frequently asked questions

Does entering 20% prove that 20% annuity applies to me?

No. It changes the calculator allocation only. Applicable treatment depends on subscriber category, exit event, corpus band and current regulations.

Does normal NPS exit always use a 60% lump sum and 40% annuity?

No. Current rules distinguish subscriber categories and corpus bands. A universal 60/40 statement is incomplete and can be outdated for the relevant context.

Is the monthly annuity estimate an ASP quote?

No. It is simple arithmetic using the entered assumed rate and does not model an annuity service provider's pricing or contract terms.

References

Authoritative sources used for facts that may change over time.

NPS All Citizen Model — Pension Fund Regulatory and Development Authority (accessed 2026-08-22)
PFRDA Exits and Withdrawals Regulations, 2015, last amended 20 July 2026 — Pension Fund Regulatory and Development Authority (accessed 2026-08-22)
All Citizen Model exits and withdrawals FAQ, updated March 2026 — Pension Fund Regulatory and Development Authority (accessed 2026-08-22)

retirement

NPS Explained: Contributions, Retirement Corpus and Annuity

How NPS contributions build a projected retirement corpus, how the calculator allocates lump sum and annuity, and where current rules and assumptions matter.