# How much money do you need to retire, once inflation is counted?

Source: https://koshex.com/blog/retirement-planning-beat-the-inflation · Published 13 September 2025 · 9 min read

There is no single number for how much money you need to retire. Work out what you will spend in your first year of retirement, then how many years the money must last. As a rough check, 25 times that first year's spending is a rule of thumb, safe only when your money earns well above inflation.

## Key takeaways

- There is no single retirement number; it depends on your spending, price rise, years to cover and returns after tax.
- In our example, ₹45,000 a month today becomes ₹1,19,963 at an assumed 4% price rise, or ₹1,93,134 at 6%, in 25 years.
- Twenty-five times the first year's spending is the 4% rule turned around, a rough US rule of thumb and not an Indian rule.
- In our tests the shortcut lasted 25 to 42 years, depending on how far the assumed return sat above the price rise.
- Test more than one inflation rate and redo the calculation at least once a year.

There is no single number. Work out what you will spend in your first year of retirement, in that year's prices. Then ask how many years the money must last and what it can earn after inflation. As a rough check, 25 times that first year's spending is a common rule of thumb, a rough guide rather than an exact rule. It is only safe when your money earns well above inflation.

Inflation is the rise in prices over time, so the same ₹100 buys less each year. It is measured by the Consumer Price Index (CPI), which tracks the prices of a basket of things households buy. Prices measured by the CPI were 4.82% higher in August 2026 than a year earlier (provisional, released 14 September 2026). A plan built on today's spending therefore starts short. This page shows the method, with one worked example. The figures in it are not a target for you.

## What decides how much money you need to retire?

Four things decide it, and you choose or estimate each one.

- **What you will spend.** Your yearly spending in retirement, not your salary.
- **How fast prices rise.** Both until you stop work and after.
- **How many years the money must last.** Retire earlier and this number grows.
- **What the money earns after tax.** Returns are counted after tax, not before.

Change any one and the answer moves a lot. The total money you save for retirement is called your corpus. Health costs need their own line in that plan, because people use more care as they age. [Our article on healthcare planning for retirement](https://koshex.com/blog/health-care-planning-for-retirement) covers that line.

## How does inflation change the amount you need?

It raises the spending you must plan for, long before you retire. A rupee figure that feels comfortable today will not be the figure you need in 25 years.

Take a 35-year-old whose household spends ₹45,000 a month today and plans to stop work at 60, which is 25 years away. We will try two assumed rates of price rise. Both are assumptions we picked for the example.

- If prices rose 4% a year (the RBI's target), the same spending would cost ₹1,19,963 a month at 60, or ₹14,39,552 a year.
- If prices rose 6% a year (the top of the RBI's band), it would cost ₹1,93,134 a month, or ₹23,17,610 a year.

You can check this yourself. Open the [lumpsum calculator](https://koshex.com/calculators/lumpsum-calculator) and enter your monthly spending as the amount. Put the inflation rate in as the return, and set the years to the time left. Leave the estimated inflation rate at 0. The final value is what today's spending becomes. (A lumpsum is money invested in one go. Here we only borrow the calculator's compounding.)

For what inflation is and how it is measured, see [our article on inflation](https://koshex.com/blog/inflation-definition).

## How do you work out your retirement corpus?

There are three steps. Start with today's spending, then the same spending in the year you retire, then the money that spending needs for the years it must last.

In words, the formula is this:

1. Take what you spend in a year today.
2. Grow it by the assumed rate of price rise, for each year until you retire. That gives your first retirement year's spending.
3. Work out how much money pays for that spending, as it keeps rising, for as many years as you need.

Step 3 is the hard one. A quick shortcut is to take 25 times the first year's spending. It is the "4% rule" turned around, because 1 ÷ 0.04 = 25. The next sections explain where it comes from and when it holds.

Here is the example again, with the shortcut added.

| Price rise assumed | Monthly spending at 60 | Yearly spending | 25 times yearly spending |
| --- | --- | --- | --- |
| 4% a year | ₹1,19,963 | ₹14,39,552 | about ₹3.6 crore |
| 6% a year | ₹1,93,134 | ₹23,17,610 | about ₹5.8 crore |

These figures are arithmetic on rates we picked for the example. They are not a forecast and not a target for you.

Look at the gap, not the numbers. A two-point difference in the assumed rate of price rise moves the answer by about ₹2.2 crore. That sensitivity is the lesson.

To see what a monthly SIP might add up to by then, use the [SIP calculator](https://koshex.com/calculators/sip-calculator). A SIP (systematic investment plan) means investing a fixed amount at regular intervals, usually monthly. Enter a return no higher than AMFI's illustration rates. AMFI's rules cap the rates used in illustrations at 12.42% to 12.80% a year for equity and 6.61% to 7.85% for fixed income. Mutual funds do not promise a return, so treat any rate you type in as an assumption.

## What inflation rate should you assume?

Nobody knows future inflation, so you are choosing an assumption, not reading a fact. Three dated reference points help.

The RBI's job is to keep consumer price inflation near 4% a year, within a band of 2% to 6%. The Government has kept that target until March 2031. The latest reading, above, is 4.82% for August 2026.

Now the past. Over the eleven years from 2014-15 to 2024-25, consumer price inflation averaged about 5% a year (lowest 3.4%, highest 6.7%), by the RBI's figures. That is the past, not a forecast.

This is why many people test more than one rate. The table above shows the reason: a small change in the rate gives a very different corpus. Try a lower and a higher rate, and see whether your plan still makes sense at both.

## Does the 4% rule work in India?

It is a rule of thumb, not an Indian rule and not a rule of any Indian regulator. It also only holds when your money earns clearly more than prices rise.

The "4% rule" comes from a 1994 study by US planner William Bengen. Using US share and bond returns from 1926 onwards, he found that taking 4% of a half-shares, half-bonds portfolio in the first year, then raising the amount with inflation each year, had always lasted at least 30 years. Turned round, it says you need about 25 times your first year's spending. Indian returns, inflation and costs differ.

### How long does the money have to last?

An Indian who reaches 60 lives, on average, about 18 more years: 17 for men, about 20 for women (government life tables for 2019-23). Averages hide a wide spread. About half of those who reach 60 live longer than the average, so a plan that stops at the average runs out for about half the people using it. Plan for your money to last well beyond that, into your late 80s or 90s.

### Does 25 times the spending last that long?

We tested the shortcut in the example year by year. Each year, the model takes out a year's spending at the start. It raises the next year's amount by the assumed price rise and lets the rest grow at an assumed rate. It ignores tax and costs. The results, for 25 times the first year's spending:

- Spending rising 6% a year, money earning a steady 7%: it pays for 28 full years.
- Spending rising 6%, money earning 8%: 33 years.
- Spending rising 6%, money earning 6%: 25 years.
- Spending rising 4%, money earning 7%: 42 years.

All of these rates are assumptions, not forecasts. Read them together. The shortcut lasts long only when the money earns clearly more than prices rise. When the two are close, 25 times lasts about 25 years. Someone retiring at 60 is about 18 years from the average lifetime, and half live longer, so 25 years leaves little room for a long life.

The [SWP calculator](https://koshex.com/calculators/systematic-withdrawal-plan-calculator) does not answer this. An SWP (systematic withdrawal plan) is an instruction to your fund house to sell a set amount of your units at regular intervals, for example every month. The calculator keeps that amount fixed, so it shows how long a fixed amount lasts, not how long spending that rises with prices lasts.

How to turn the money into income, and why the order of good and bad years matters, is in [our article on retirement income](https://koshex.com/blog/retirement-income). For SWP mechanics, see [our SWP article](https://koshex.com/blog/systematic-withdrawal-plan-swp).

## How can you protect your retirement money from inflation?

Only by holding some of the money in things that can grow faster than prices, which carry risk, and by keeping the plan up to date. Nothing removes the risk; no one can reliably tell in advance when markets will rise or fall.

The mix is yours to decide, so here are the factors, not a recipe.

- **Time left.** The years left before you need the money are one factor. Moving gradually from equity (shares of companies) towards debt (loans to governments, banks or companies, through bonds and similar paper) as the date nears is a matter of the calendar, not of guessing markets. [Our article on switching from equity to debt](https://koshex.com/blog/is-it-the-right-time-to-switch-from-equity-to-debt) goes through it.
- **How large a fall you can sit through.** [Our article on risk tolerance](https://koshex.com/blog/what-is-risk-tolerance-and-why-is-it-important) helps you judge this.
- **Money already in PPF, EPF or NPS.** PPF is the Public Provident Fund, EPF the Employees' Provident Fund and NPS the National Pension System. Count what you hold there before deciding what else you need. NPS returns rise and fall with markets, and no return is fixed.
- **How the pieces fit together.** [Our asset allocation article](https://koshex.com/blog/how-asset-allocation-impacts-your-portfolio) explains the idea.

Fixed-income options pay a set rate, and after tax that rate can trail prices. [Our article on inflation and fixed deposits](https://koshex.com/blog/how-does-inflation-affect-fixed-deposit) shows how.

As a distributor, Koshex helps you choose a fund that suits your goal and timeline. The Koshex app runs a free risk-profile questionnaire.

## How often should you redo the calculation?

Whenever your spending, income or plans change, and at least once a year when the new inflation figures are out.

For the full planning steps, see [our retirement planning article](https://koshex.com/blog/retirement-life). If you are starting late, [this article on your 40s and 50s](https://koshex.com/blog/retirement-planning-at-40s-how-you-should-move-ahead) is the place to go. And if you want to retire early, [our early retirement article](https://koshex.com/blog/millennials-crazy-ways-to-save-money-for-retiring-early) covers what changes.

## Frequently asked questions

### How much money do I need to retire in India?

There is no single number for how much money you need to retire. It depends on what you will spend, how fast prices rise, how many years the money must last, and what it earns after tax. As a rough check, 25 times your first retirement year's spending is a rule of thumb, safe only when returns clearly beat inflation.

### What is the formula for a retirement corpus?

There are three steps. Take today's yearly spending and grow it by an assumed price rise up to your retirement year. Then work out how much money pays for that rising spending for the years it must last. The shortcut for the last step is 25 times the first year's spending.

### Is ₹1 crore or ₹2 crore enough to retire?

There is no single answer, because it depends on your own spending. By the 25 times shortcut, ₹1 crore supports about ₹4 lakh of first-year spending and ₹2 crore about ₹8 lakh. Compare that with your own spending in your retirement year, in that year's prices.

### How much do I need to retire at 40, 45 or 50?

The method is the same, but the money must cover more years and you have fewer years to save. That makes the 25 times shortcut less safe. Our articles on early retirement and on starting late in your 40s and 50s go through it.

### What inflation rate should I use for retirement planning?

Nobody knows future inflation, so test more than one rate. The RBI's target is 4% within a band of 2% to 6%, and the latest reading was 4.82% for August 2026. From 2014-15 to 2024-25 it averaged about 5% a year, which is the past and not a forecast.

### Does the 4% rule apply in India?

It is a US rule of thumb from William Bengen's 1994 study of 30-year retirements, not an Indian rule. It holds only when returns clearly beat inflation. In our example, with spending rising 6% a year and an assumed 7% return, 25 times lasted 28 years.

### How many years should my retirement money last?

Well beyond the average, into your late 80s or 90s. An Indian who reaches 60 lives about 18 more years on average (2019-23 life tables). About half of those who reach 60 live longer, so a plan to the average runs out for about half of them.

### Is my retirement corpus taxed when I use it?

It depends on where the money sits. Interest from bank fixed deposits is taxed at your slab rate (your normal income-tax rate), and payments from PPF are tax-free. Mutual fund withdrawals are taxed only on the gain, and gains on equity funds by how long you held the units. Gains on debt fund units (over 65% in debt) bought from 1 April 2023 are taxed at your slab rate, however long you hold them.

*This article explains how things work; it is not advice to buy or sell any investment. Mutual fund investments are subject to market risks, read all scheme related documents carefully.*