How much do I need to retire? A simple way to estimate your retirement corpus

"How much do I need to retire?" is one of the most common questions we hear, and the honest answer is: it depends on how you live, not on a magic number. The good news is that you can estimate your retirement corpus yourself with five inputs and some simple maths. This guide walks through each input, then puts them together in a worked example.

The five numbers that decide your retirement corpus

Every retirement calculation, however sophisticated, comes down to these:

1. Your expenses today — what your household spends in a year.
2. Inflation — how fast those expenses will grow.
3. Years to retirement — how long inflation has to work on your costs.
4. Years in retirement — how long the money needs to last.
5. Withdrawal rate or post-retirement return — how much you can safely draw each year.

Get these roughly right and you will have a sensible target. Get one badly wrong (usually inflation or life expectancy) and the number can be off by crores.

Step 1: Start with expenses, not income

Many people start from their salary. It's better to start from what you actually spend, because that is what you need to replace.

• Add up regular monthly costs: groceries, utilities, rent or society charges, transport, domestic help, phone and internet.
• Add yearly costs: insurance premiums, festivals, travel, gifts, home repairs.
• Remove costs that will end before retirement, such as home loan EMIs and children's school fees.
• Add costs that may rise later, especially healthcare. Health insurance premiums climb with age, and out-of-pocket medical costs usually do too.

Bank and card statements for the last 12 months give a far truer picture than a guess.

Step 2: Adjust for inflation

Money loses buying power every year. If your household needs ₹50,000 a month today, it will need much more in 25 years for the same lifestyle.

The formula is simple:

Future expense = Today's expense × (1 + inflation rate) ^ years to retirement

Inflation in India has varied a lot over the years, and personal inflation (especially medical and education costs) often runs higher than the headline figure. Many people use an assumption of 6% or 7% for long-term planning. Pick a rate you're comfortable with and stick to it consistently.

Step 3: Decide how long retirement lasts

If you retire at 60, your money may need to last 25 to 30 years or more. Planning only till 75 is one of the most common mistakes. It is safer to plan to at least 85 or 90, and longer if your family tends to live long. Running out of money at 82 is a far worse outcome than leaving something behind.

Step 4: Choose a withdrawal rate or return assumption

There are two common ways to turn a yearly expense into a corpus.

The withdrawal-rate method. Divide your first-year retirement expense by a "safe" withdrawal rate. The well-known 4% rule comes from US research; because Indian inflation has historically been higher, many people use a more cautious 3% to 3.5%.

The real-return method. Assume a return on your retirement money and an inflation rate, and work out how much is needed so the corpus lasts exactly your chosen number of years. This is what most retirement calculators do.

A retirement corpus is an estimate, not a promise. Small changes in inflation or return assumptions move the target a lot, so review it every few years.

A worked example

Here are the assumptions for an illustration. They are assumptions only, not predictions of returns or inflation.

Expenses at 60: ₹50,000 × (1.06)^25 ≈ ₹50,000 × 4.29 ≈ ₹2.15 lakh a month, or about ₹25.75 lakh a year.

Corpus using the real-return method: with an assumed 8% return, 6% inflation and 25 years of withdrawals taken at the start of each year, the corpus works out to roughly 20 times the first year's expense, or about ₹5.2 crore.

Corpus using a 4% withdrawal rate: ₹25.75 lakh ÷ 0.04 ≈ ₹6.4 crore. At 3.5%, it is about ₹7.4 crore.

These numbers look large, and that is the point. Inflation over 25 years more than quadruples your costs. Starting early, and letting compounding do the heavy lifting, is what makes these targets reachable. You can try your own numbers in our retirement calculator and see how a monthly SIP could build towards it.

Don't forget to subtract what you already have. Existing EPF, PPF, NPS and mutual fund balances will keep growing until retirement and reduce the gap you need to fill. Our guide on NPS vs PPF vs EPF explains how these retirement accounts differ.

Bucketing: making the corpus last

Reaching the number is half the job. The other half is drawing it down without being forced to sell investments at a bad time. A common approach is to split the corpus into three buckets:

• Bucket 1 — the next 2 to 3 years of expenses. Kept in savings accounts, fixed deposits or liquid funds. This is what you live on.
• Bucket 2 — years 3 to 10. Kept in lower-volatility options such as debt funds, bonds, senior citizen schemes or conservative hybrid funds.
• Bucket 3 — beyond 10 years. Kept partly in equity so the corpus can keep growing ahead of inflation.

Every year or two, you refill Bucket 1 from the others, usually from whichever has done well. A systematic withdrawal plan can automate this; see STP and SWP explained.

Frequently asked questions

Is ₹1 crore enough to retire in India?

For most urban households retiring 20 or more years from now, ₹1 crore is unlikely to be enough on its own, because inflation will raise costs sharply by then. Whether it suffices depends entirely on your expenses, other income such as rent or pension, and how long you need the money to last.

What inflation rate should I use?

Many people use 6% to 7% for general expenses and a higher figure for healthcare. Being slightly conservative is safer than being optimistic.

Should I count my house in my retirement corpus?

Only if you plan to sell it, rent it out or downsize. A house you live in doesn't pay your bills, so most people leave it out of the calculation.

How often should I recalculate?

Once every two or three years, and after major life events such as a job change, marriage, children or an inheritance.

Key takeaways

• Start from your expenses, not your income, and include rising healthcare costs.
• Inflation over 20 to 30 years can multiply your costs four times or more.
• Plan for a long retirement, to at least 85 or 90.
• Use a cautious withdrawal rate or a calculator that factors in returns and inflation, and label your assumptions.
• Use buckets to keep near-term money safe while longer-term money keeps growing.
• Our team can help you map your existing investments against your target.