Estimate your Tier-I retirement corpus, PFRDA statutory lump-sum vs annuity allocation, and exclusive Section 80CCD(1B) tax shield.
Annuity Allocation Percentage40%
Note: Minimum 40% of maturity corpus must be invested in an annuity at age 60.
Retirement Corpus Distribution
Tax-Free Lump Sum: ₹68,37,976 (60%)
Annuity Investment: ₹45,58,651 (40%)
Total Amount Invested
₹18,00,000
Total Investment Gain
₹95,96,627
Total Accumulated Pension Wealth
₹1,13,96,627
Tax-Free Lump-Sum Withdrawal (Section 10(12A))
₹68,37,976
Mandatory Annuity Investment (ASP Reinvestment)
₹45,58,651
Estimated Lifetime Monthly Pension Income
₹22,793 / month
Section 80CCD(1B) Exclusive Tax Shield
Additional ₹50,000 annual deduction over and above Section 80C ₹1.5 Lakh ceiling under Old Tax Regime.
Tax Bracket:
Annual NPS Contribution
₹60,000
Eligible 80CCD(1B) Rebate
₹50,000 / yr
Direct Tax Saved Annually
₹15,600 / yr
Total Tax Saved Over Tenure
₹4,68,000
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About the NPS Calculator
The National Pension System is a defined-contribution retirement scheme regulated by the Pension Fund Regulatory and Development Authority, in which contributions are invested across equity, corporate debt, government securities and alternative assets according to an allocation the subscriber chooses. Unlike a defined-benefit pension, the eventual payout depends entirely on how much was contributed, how long it compounded, and how the underlying funds performed, so no return is guaranteed. Two structural features shape outcomes more than anything else. The first is the very long horizon: contributions starting in a subscriber's twenties compound for three to four decades, which makes the starting age far more consequential than the contribution amount. The second is the mandatory annuitisation at exit, where a prescribed minimum portion of the accumulated corpus must be used to purchase an annuity that provides the actual pension, with the balance available as a lump sum.
Mathematical Formula & Logic
NPS accumulation is the future value of a series of regular contributions.
1. Future value of monthly contributions (annuity due):
Corpus = Σ PMT × (1 + r)^j for j = 1 to n
Where PMT is the monthly contribution, r is the monthly rate of return,
and n is the total number of monthly contributions.
2. Equivalent closed form:
Corpus = PMT × [((1 + r)ⁿ − 1) ÷ r] × (1 + r)
Where:
r = expected annual return ÷ 12
n = (retirement age − current age) × 12
3. Exit split at retirement:
Annuity Purchase = Corpus × annuity percentage (statutory minimum applies)
Lump Sum = Corpus − Annuity Purchase
4. Resulting monthly pension:
Monthly Pension = (Annuity Purchase × annuity rate) ÷ 12
The annuity rate is set by the chosen life insurer at the time of
purchase and depends on the annuity variant selected, so it is an
assumption rather than a known quantity during accumulation.
Step-by-Step Example
Project a corpus for a subscriber aged 30 contributing 5,000 monthly until 60, assuming a 10 percent annual return:
1. Monthly contribution PMT = 5,000
2. Investment horizon = 60 − 30 = 30 years, so n = 360 months
3. Monthly rate r = 0.10 ÷ 12 = 0.0083333
4. Growth factor (1 + 0.0083333)^360 = 19.8374
5. Annuity factor = (19.8374 − 1) ÷ 0.0083333 = 2,260.49
6. Apply the annuity-due adjustment: 2,260.49 × 1.0083333 = 2,279.33
7. Corpus = 5,000 × 2,279.33 = 11,396,627
8. Total contributed = 5,000 × 360 = 1,800,000
9. Growth component = 11,396,627 − 1,800,000 = 9,596,627
The exit split at a 40 percent annuity allocation:
10. Annuity purchase = 11,396,627 × 0.40 = 4,558,651
11. Lump sum received = 11,396,627 × 0.60 = 6,837,976
12. At an assumed 6 percent annuity rate, monthly pension = (4,558,651 × 0.06) ÷ 12 = 22,793
The starting-age effect:
13. The same 5,000 monthly begun at 40 rather than 30 compounds for only 240 months, producing a corpus of roughly 3,828,485 — about one third of the figure above, despite contributing two thirds as much. Eighty-four percent of the 30-year corpus is growth rather than contribution, which is why starting early dominates every other variable.
Reference Data & Values
start age
monthly contribution
years to_60
total contributed
corpus at_10pct
25
5,000
35
2,100,000
19,141,384
30
5,000
30
1,800,000
11,396,627
35
5,000
25
1,500,000
6,689,452
40
5,000
20
1,200,000
3,828,485
30
10,000
30
3,600,000
22,793,253
30
15,000
30
5,400,000
34,189,880
Frequently Asked Questions
Because contributions add linearly while returns compound exponentially, so each additional year at the start of the horizon is worth far more than one at the end. In the worked example, 5,000 monthly from age 30 produces a corpus of about 11.4 million by 60, while the same amount started at 40 reaches only about 3.83 million. The later start contributed two thirds as much money but ended with one third of the corpus, because the missing decade was the one during which the earliest contributions would have compounded the longest. No realistic increase in contribution amount recovers a lost decade.
Tier I is the core retirement account, with restricted withdrawal, mandatory annuitisation at exit, and eligibility for the scheme's tax deductions. Tier II is a voluntary open-access account that functions more like an investment account, permitting withdrawal at any time but carrying no lock-in and, for most subscribers, no tax benefit. A Tier I account must exist before a Tier II can be opened. In practice Tier I is the retirement vehicle and Tier II is a flexible add-on for surplus savings.
At exit a prescribed minimum proportion of the accumulated corpus must be used to purchase an annuity from a registered life insurer, which pays the actual monthly pension, while the remainder may be taken as a lump sum. The lump sum portion currently receives favourable tax treatment, whereas the pension received from the annuity is taxable as income in the year received. Because the annuity rate is determined by the insurer at the moment of purchase and depends on the variant chosen, the eventual pension is not knowable during the accumulation years.
Yes. Subscribers select a pension fund manager and choose between Active Choice, where you set your own allocation across equity, corporate bonds, government securities and alternative assets subject to a cap on the equity portion, and Auto Choice, where allocation follows a lifecycle path that shifts progressively from equity toward debt as you age. Auto Choice comes in aggressive, moderate and conservative variants. Both the fund manager and the choice can be changed later, subject to the frequency limits the regulator prescribes.
No. NPS is a market-linked defined-contribution scheme with no guaranteed return whatsoever, and the figure you enter is an assumption used to project a scenario rather than a promise. Actual outcomes depend on the performance of the underlying equity and debt funds over decades, and returns will vary year to year including periods of negative performance. It is worth running the projection at several rates, such as 8, 10 and 12 percent, to understand the range of plausible outcomes rather than anchoring on a single number.
Partial withdrawal from a Tier I account is permitted only after a minimum period of membership and only for specified purposes such as higher education, marriage of children, purchase or construction of a house, or treatment of specified illnesses, and is capped at a proportion of the subscriber's own contributions rather than the full corpus. Complete premature exit is possible but requires a larger share of the corpus to be annuitised than at normal retirement, leaving a much smaller lump sum. The specific conditions are set by regulation and should be checked against current rules.