The National Pension System (NPS) is widely used for building a retirement corpus, but accumulating a large fund is only one part of retirement planning. Another important question is what happens to that money when a subscriber retires and how much regular pension the accumulated corpus can potentially generate.

For central government employees covered by NPS, the source article states that under normal retirement rules, up to 60% of the accumulated corpus can be withdrawn as a lump sum, while at least 40% is used to purchase an annuity. The annuity then provides regular pension income after retirement.

However, there is no single fixed monthly NPS pension for everyone. The final amount depends on factors including the size of the retirement corpus, the portion allocated to annuity, the annuity option selected and the rate available at the time of purchase.

Here is a simple calculation showing how different NPS corpus sizes—from ₹25 lakh to ₹1.5 crore—could translate into lump-sum withdrawals and monthly pension.

How Is NPS Money Used at Retirement?

Under the normal retirement scenario described for central government employees, a subscriber may withdraw up to 60% of the NPS corpus as a lump sum.

At least 40% must be used to purchase an annuity. Subscribers may choose to allocate more than 40% to an annuity if they want a larger portion of their accumulated savings to generate regular pension income.

Suppose an employee retires with an NPS corpus of ₹50 lakh. If 60% is withdrawn, the person receives ₹30 lakh as a lump sum.

The remaining ₹20 lakh, representing 40% of the corpus, would be used to purchase an annuity.

How Much Pension Could ₹50 Lakh Generate?

To understand the calculation, assume purely for illustration that the annuity provides an annual payout equivalent to 7% of the amount invested.

With ₹20 lakh allocated to the annuity:

₹20 lakh × 7% = ₹1.40 lakh per year

Dividing ₹1.40 lakh by 12 gives an illustrative monthly pension of approximately ₹11,667.

It is important to note that the 7% rate is being used only as an example. It is not a guaranteed NPS pension rate. The actual payout will depend on the annuity plan and rates available when the annuity is purchased.

NPS Pension Calculation From ₹25 Lakh to ₹1.5 Crore

Using the same assumptions—60% lump-sum withdrawal, 40% annuity allocation and an illustrative annual annuity payout rate of 7%—the calculations would look like this:

These figures demonstrate how the size of the annuity investment can influence monthly retirement income. They should not be interpreted as guaranteed NPS pension amounts.

What If Your NPS Corpus Reaches ₹1 Crore?

Consider an employee who has accumulated ₹1 crore in NPS by retirement.

Using the 60:40 example, the subscriber could withdraw ₹60 lakh as a lump sum and use the remaining ₹40 lakh to purchase an annuity.

At the illustrative annual payout rate of 7%:

₹40 lakh × 7% = ₹2.80 lakh per year

That would translate into approximately ₹23,333 per month.

Again, ₹23,333 is not a fixed or promised NPS pension on a ₹1 crore corpus. It is simply the result of applying the example 7% annual rate to the ₹40 lakh annuity allocation.

Your Annuity Choice Can Change the Pension Amount

The annuity selected at retirement is an important part of the NPS exit process because different options can provide different benefits and payouts.

One option may provide pension income throughout the subscriber's lifetime. Another may continue payments to the subscriber's spouse after the subscriber dies.

Some annuity products may also offer a return-of-purchase-price feature, under which the amount originally used to buy the annuity is returned according to the terms of the plan after the annuitant's death.

Because the benefits and conditions differ, the pension generated by the same annuity investment can vary depending on the option chosen.

A Bigger NPS Corpus Does Not Tell the Whole Story

Seeing a retirement corpus of ₹50 lakh, ₹1 crore or ₹1.5 crore may look impressive, but the total corpus alone does not reveal how much monthly pension a subscriber will receive.

The amount used for purchasing the annuity is particularly important.

For example, under the illustration above, a ₹1 crore NPS corpus with a 40% annuity allocation means only ₹40 lakh is used to generate regular pension income.

If the subscriber chooses to allocate more than 40% to the annuity, the amount available for regular pension could increase. At the same time, this would leave a smaller portion available for lump-sum withdrawal.

Retirement planning therefore involves balancing the need for an immediate lump sum with the requirement for long-term regular income.

NPS Exit Rules May Not Be Identical for Everyone

Another important point is that NPS subscribers should not assume that one exit formula applies to every account.

The source specifically describes the 60% lump-sum and 40% annuity framework for central government employees under normal retirement conditions. Rules applicable to other NPS models or premature exits may differ.

Subscribers should therefore check the rules applicable to their particular NPS category and retirement circumstances before making withdrawal or annuity decisions.

What NPS Investors Should Understand Before Retirement

The key lesson is that building a large NPS corpus is only the first stage of retirement planning. Subscribers also need to understand how that corpus will be converted into usable retirement income.

Under the illustration used above, a ₹25 lakh corpus could generate around ₹5,833 per month from a ₹10 lakh annuity investment, while a ₹1 crore corpus could generate approximately ₹23,333 per month from ₹40 lakh invested in an annuity. With a ₹1.5 crore corpus and ₹60 lakh annuity allocation, the illustrative monthly payout rises to around ₹35,000.

But all these figures assume a 7% annual annuity payout solely for calculation purposes.

The actual pension could be different depending on annuity rates, the proportion of the corpus allocated to the annuity and the payout option selected at retirement.

For NPS subscribers approaching retirement, understanding the relationship between corpus size, lump-sum withdrawal, annuity allocation and pension income can therefore be just as important as building the retirement fund itself.

Disclaimer: This article is for general information and educational purposes only. The 7% annuity rate and resulting pension figures are illustrative and should not be treated as guaranteed returns or pension amounts. NPS rules and annuity terms may vary or change. Subscribers should verify the applicable rules and seek professional financial advice before making retirement decisions.