Retirement Planning in India:
How Much Corpus Do You Actually Need?
Retirement planning is one of those financial tasks that feels abstract until it suddenly feels urgent. Most people underestimate how much they need, primarily because they underestimate inflation and overestimate how long their corpus will last. This article walks through the maths of retirement planning in India — how much corpus you need, how to calculate the SIP to build it, and what to do with the corpus once you retire.
All figures in this article use illustrative return and inflation assumptions. Actual outcomes depend on market performance, individual spending, longevity, and healthcare costs — none of which can be predicted. This article is for general educational purposes and does not constitute retirement planning advice. For a personalised retirement plan, consult a SEBI Registered Investment Adviser.
Why Most People Underestimate Their Corpus Need
Two forces work together to make the retirement number larger than intuition suggests:
- Inflation compounds your expenses. If your current monthly household expenses are ₹50,000 and inflation averages 6%, those same expenses will cost approximately ₹1,61,000 per month in 20 years and ₹2,87,000 in 30 years.
- Life expectancy is rising. A person retiring at 60 in India today has a reasonable probability of living into their mid-80s or beyond. A 25-year retirement is not an extreme scenario — it is the median outcome for a healthy 60-year-old. Your corpus must last that long.
The inflation-adjusted expense reality: Planning retirement income based on today's expenses without adjusting for inflation means your corpus will feel adequate at 60 but seriously insufficient at 75.
The Four Numbers You Need
Calculating your retirement corpus requirement comes down to four inputs:
-
Current monthly expenses (₹) What does your household spend per month today? Include rent or EMI, groceries, utilities, transport, insurance, and discretionary spending. Exclude one-time expenses and any EMIs that will have ended by retirement.
-
Years to retirement The number of years between now and when you plan to stop active income. This determines how long your corpus-building phase lasts and how inflation will scale up your expenses by retirement date.
-
Post-retirement life expectancy (years) How many years of retirement income does the corpus need to support? A 60-to-85 planning horizon (25 years) is a widely used baseline. Adjust upward for family history of longevity or health conditions.
-
Inflation rate and post-retirement return rate Inflation erodes the value of withdrawals over time. Your post-retirement portfolio return (usually a conservative mix of debt and equity) determines how quickly the corpus depletes against growing withdrawals.
The Corpus Formula
The retirement corpus must support a monthly withdrawal that starts at the inflation-adjusted expense figure at retirement and grows with inflation each year. The present value of this growing annuity gives the required corpus:
E_ret = E_now × (1 + inflation)^years_to_retirement
Corpus = E_ret × [ 1 – ((1+g)/(1+r))^n ] / (r – g) × (1 + r)
r = monthly post-retirement return (annual ÷ 12)
g = monthly inflation rate (annual ÷ 12)
n = retirement duration in months
Assumes r > g (return exceeds inflation)
Illustrative Corpus Requirements at Different Ages
Current monthly expenses: ₹50,000. Retiring at age 60. Planning horizon: age 85 (25 years of retirement). Inflation: 6% p.a. Post-retirement return: 7% p.a. (conservative corpus mix).
| Current Age | Years to Retire | Monthly Expense at 60 | Corpus Needed at 60 | SIP Needed (12% p.a.) |
|---|---|---|---|---|
| 25 | 35 years | ₹3.07 L/mo | ₹5.93 Cr | ₹17,600/mo |
| 30 | 30 years | ₹2.87 L/mo | ₹5.55 Cr | ₹27,400/mo |
| 35 | 25 years | ₹2.15 L/mo | ₹4.15 Cr | ₹36,700/mo |
| 40 | 20 years | ₹1.60 L/mo | ₹3.09 Cr | ₹55,200/mo |
| 45 | 15 years | ₹1.20 L/mo | ₹2.32 Cr | ₹1.03 L/mo |
All figures are purely illustrative. Assumes 6% inflation, 7% post-retirement return, 12% pre-retirement SIP return, 25-year retirement horizon. SIP returns are not guaranteed. Does not account for existing savings, EPF, gratuity, or other retirement benefits. Your actual numbers will vary significantly.
The cost of starting late: A 35-year-old needs approximately twice the monthly SIP of a 30-year-old to reach the same retirement corpus. Every 5-year delay roughly doubles the required monthly investment due to the loss of compounding years.
Retirement Corpus Calculator
Enter your age, current expenses, inflation assumption, and retirement age. Get the exact corpus needed and the monthly SIP to build it.
What to Do With the Corpus: SWP
Once you have built your retirement corpus, the question becomes: how do you draw income from it without depleting it too quickly?
A Systematic Withdrawal Plan (SWP) from a mutual fund works as follows: you keep the corpus invested (in a conservative or balanced allocation) and instruct the fund house to redeem a fixed amount each month. The remaining units continue to earn returns. If the portfolio's return rate is higher than the withdrawal rate, the corpus can grow even during the withdrawal phase — or at least last significantly longer than a fixed deposit with the same total amount.
SWP vs FD for Retirement Income
Consider a ₹2 crore corpus at retirement:
| Approach | Monthly Income | Corpus Lasts | Tax Efficiency |
|---|---|---|---|
| FD at 7% p.a. (30% slab) | ₹81,700 post-tax | Indefinitely (if only drawing interest) | Low — taxed at slab rate |
| SWP from balanced fund at 8% p.a. return | ₹1,00,000/mo | 25+ years | Higher — LTCG at 12.5% on gains portion |
| SWP from conservative hybrid at 7.5% p.a. | ₹90,000/mo | 22–24 years | Moderate — depends on equity/debt split |
Illustrative only. SWP fund returns are not guaranteed and will vary. FD income is certain at the agreed rate. Tax comparison simplified; actual tax depends on your total income in the year. SWP duration estimates assume inflation-linked withdrawal increases of 5% annually.
SWP Calculator
Enter your corpus, withdrawal amount, and expected return. See how many years the corpus lasts and the year-wise balance.
The Role of EPF, Gratuity, and NPS
Most salaried employees in India already have some retirement savings in the form of EPF (Employees' Provident Fund), gratuity, and possibly NPS. These should be factored into your planning:
- EPF: The current rate is 8.25% p.a. (FY2024-25). Your EPF corpus at retirement can be used to offset the SIP requirement. EPF withdrawals are tax-free after 5 continuous years of service.
- Gratuity: Payable after 5 years of service. For employees under the Payment of Gratuity Act, this is a known formula (15 days' salary per year of service). Tax-free up to ₹20 lakh.
- NPS: Provides market-linked accumulation and a mandatory annuity for 40% of the corpus. The annuity income is taxable. NPS is useful as a supplement, particularly if your employer offers 80CCD(2) contributions.
Practical approach: Run your retirement calculator with and without your estimated EPF/gratuity lump sum. The difference tells you how much additional SIP-based corpus you need to build through mutual funds or other instruments.
Healthcare — The Variable Most People Forget
Healthcare expenses in India have historically inflated faster than general CPI — estimates range from 10–14% p.a. for medical costs. A comprehensive health insurance policy (₹20–25 lakh cover, family floater including parents) is a critical component of retirement planning, not an optional extra. The annual premium for a 60-year-old is typically ₹40,000–₹80,000 or more and must be factored into monthly expense estimates.
- PFRDA — Retirement Planning
- SEBI Investor Education
- Verify the author: AMFI ARN-309076
The author is an AMFI Registered Mutual Fund Distributor (ARN-309076, valid to 22 Sep 2027) based in Boduppal, Hyderabad, serving families across Telangana, Andhra Pradesh, Tamil Nadu and NRIs in Telugu, English and Tamil. She is also an Authorised Person of Kotak Securities Ltd (NSE AP AP0291573301 · NCDEX AP 127627) and an IRDAI-certified PoSP. Her practice focuses on portfolio hygiene — KYC, nominee and IEPF recovery — before goal-based investing.
This article is for general educational and informational purposes only. All figures, projections, and illustrations are hypothetical and use simplified assumptions. Actual retirement needs depend on individual circumstances including income, health, family obligations, lifestyle, and market conditions. Mutual fund SIP returns are not guaranteed. FD and EPF rates may change. Nothing in this article constitutes retirement planning advice or a solicitation to invest. Please consult a SEBI Registered Investment Adviser for a personalised retirement plan. Guduru Anantha Eswari Rajeswari (ARN-309076) is an AMFI Registered Mutual Fund Distributor, not a SEBI Registered Investment Adviser. Past performance of mutual funds is not indicative of future results.