Retirement Planning Calculator Corpus & Monthly Savings
Find out how much you need to save every month to retire comfortably — the calculator factors in inflation, investment returns, and any existing savings to give you a personalised target.
In today's rupees — the calculator adjusts for inflation automatically
What Is a Retirement Planning Calculator?
A Retirement Planning Calculator is an online tool that estimates the total wealth you need to accumulate before you retire, and the monthly savings required to get there. By entering your current age, retirement age, expected expenses, inflation, and return assumptions, it converts your future lifestyle goal into a concrete monthly savings target. It adjusts every rupee for inflation and factors in investment growth, so your plan is grounded in reality — not optimistic guesswork.
How to Use This Calculator
- Enter your current age, desired retirement age, and estimated life expectancy
- Enter the monthly income you want in retirement — expressed in today's rupees (the calculator adjusts for inflation automatically)
- Set the expected annual inflation rate and your expected return on investment both before and after retirement
- If you already have savings earmarked for retirement, select Yes and enter the amount — the calculator shows how much this reduces your monthly SIP requirement
- The right panel instantly shows your Required Retirement Corpus and the Required Monthly Savings needed to reach it
Retirement Planning Formula
The calculator works in two steps. First, it projects your current expenses forward to retirement using inflation:
Future Annual Expense = Current Annual Expense × (1 + inflation rate)^years to retirement
Step-by-step example: you need ₹35,000 per month (₹4,20,000 per year) in today's terms. You are 35, retiring at 60 — 25 years away. Inflation is 6%.
FV = ₹4,20,000 × (1.06)^25 = ₹4,20,000 × 4.292 = ₹18,02,640 per year at retirement. That works out to roughly ₹1.50 lakh per month — the actual rupees you will need at age 60 to maintain today's ₹35,000 lifestyle.
In the second step, this inflation-adjusted expense figure is combined with your post-retirement investment return to calculate the required corpus, and then your pre-retirement return rate is used to find the monthly SIP needed to accumulate it.
How Much Do You Need to Retire Comfortably in India?
Retirement needs vary based on lifestyle, healthcare, travel, and location. A widely used rule of thumb is the 25x rule — target a corpus equal to 25 times your annual expenses at retirement. In India, safe withdrawal rates are typically 3.5–4.5% to account for higher inflation. The table below gives indicative figures based on today's monthly expense:
| Current Monthly Expense (Today) | Indicative Corpus Needed at Age 60 |
|---|---|
| ₹50,000 | ₹2.1 – 2.8 Crore |
| ₹1,00,000 | ₹4.2 – 5.6 Crore |
| ₹2,00,000 | ₹8.4 – 11.2 Crore |
Pre-Retirement vs Post-Retirement Returns
| Phase | Typical Portfolio Mix | Expected Return Range |
|---|---|---|
| Pre-retirement (accumulation) | Equity-heavy — ELSS, index funds, diversified mutual funds | 10–15% p.a. |
| Post-retirement (drawdown) | Debt-heavy — FD, SCSS, debt funds, SWP | 5–8% p.a. |
How Inflation Erodes Your Retirement Savings
At 6% average inflation, ₹1 lakh today will require ₹3.2 lakh in 20 years and ₹10.3 lakh in 40 years to maintain the same purchasing power. Planning for retirement without accounting for inflation leads to a shortfall of 60–70% — meaning your corpus runs out far sooner than expected. This calculator inflates every rupee of your current expenses before computing your corpus target.
Benefits of Using This Calculator
The earlier you begin, the more compounding works in your favour and the lower your monthly burden. Use this as a starting point and revisit the numbers at least once a year or after any major life or income change.
- Gives you a clear, personalised corpus target instead of a vague rule-of-thumb estimate
- Shows the exact monthly SIP you need to start today to reach that target
- Demonstrates the real long-term cost of inflation on your retirement lifestyle
- Reduces your SIP requirement by accounting for existing savings, EPF, PPF, or NPS balances
- Lets you test different scenarios — retire earlier, save more, adjust return assumptions — instantly