Short answer: if you want the buying power of ₹50,000 a month when you retire at 60, you will need a corpus somewhere between about ₹3.9 crore and ₹9.3 crore, depending on how old you are today. The younger you are, the bigger that number looks, because inflation has more years to push your future costs up. But here is the twist that changes everything: the younger you are, the smaller the monthly SIP you need to get there. Start at 25 and about ₹14,300 a month does it. Wait until 40 and you need around ₹38,800 a month for a smaller target.
Let me walk you through the full calculation in three clear steps: what ₹50,000 becomes by the time you retire, the corpus that can pay you that income for 25 years, and the exact SIP you need from ages 25, 30, 35, and 40.
The assumptions behind the numbers
Every retirement number depends on its assumptions, so here are mine, kept realistic for India:
- Target income: ₹50,000 a month in today’s money.
- Retirement age: 60.
- Retirement length: the corpus must last 25 years, to age 85.
- Inflation: 6 percent a year, before and during retirement.
- Return while building the corpus: 12 percent from equity.
- Return during retirement: 8 percent from a safer, mixed portfolio.
Change these and the numbers move, but the lesson stays the same.
Step 1: ₹50,000 today is not ₹50,000 at retirement
This is the step most people skip, and it is the most important one. ₹50,000 buys a certain lifestyle today. To buy that same lifestyle at 60, you will need far more, because prices keep rising. The future value of your monthly income is:
\text{Income at 60} = 50{,}000 \times (1 + g)^{Y}Here g is inflation and Y is the years until you retire. At 6 percent inflation, ₹50,000 today becomes:
- If you are 25 (35 years to go): about ₹3.84 lakh a month
- If you are 30 (30 years): about ₹2.87 lakh a month
- If you are 35 (25 years): about ₹2.15 lakh a month
- If you are 40 (20 years): about ₹1.60 lakh a month
Read that again. A 25-year-old will need nearly ₹3.84 lakh a month at 60 just to live the ₹50,000 life of today. That is not a typo, it is what six percent inflation does over 35 years. You can see how brutal this effect is over time in our post on what ₹1 crore will really be worth in 2046, and check realistic inflation figures in the inflation rate in India over the last 10 years.
Step 2: The corpus that pays you that income for 25 years
Now we size the pot. The corpus has to do two jobs at once: pay you every month, and keep growing so the payments can rise with inflation for all 25 years. Because your income keeps climbing during retirement, we size it using a growing annuity:
\text{Corpus} = A \times \frac{1 - \left(\frac{1+g}{1+R}\right)^{n}}{R - g} \times (1 + R)Here A is your first year’s annual income at retirement, g is inflation, R is the return during retirement, and n is 25 years. Plugging in each starting age gives the corpus you need on the day you retire:
- Age 25 today: about ₹9.30 crore
- Age 30 today: about ₹6.95 crore
- Age 35 today: about ₹5.19 crore
- Age 40 today: about ₹3.88 crore
One honest caveat. This corpus assumes steady 8 percent returns and that you draw it down to near zero over exactly 25 years. Markets are not steady, and you might live longer, so for a bigger safety margin many planners size the pot using a safe withdrawal rate of 3 to 3.5 percent instead, which means aiming higher. We cover why that matters in our guide to the safe withdrawal rate in India. Treat these figures as a solid planning base, not a hard floor.
Step 3: The monthly SIP you need, by age
Here is where it all comes together. To build your target corpus with a monthly SIP earning 12 percent, we use the standard SIP formula:
FV = P \times \frac{(1 + r)^n - 1}{r} \times (1 + r)Solving for the monthly amount P at each starting age gives this:
| Start age | ₹50k/month grows to | Corpus needed at 60 | Monthly SIP needed | You actually invest |
|---|---|---|---|---|
| 25 | ₹3.84 lakh/mo | ₹9.30 crore | About ₹14,300 | About ₹60.1 lakh |
| 30 | ₹2.87 lakh/mo | ₹6.95 crore | About ₹19,700 | About ₹70.9 lakh |
| 35 | ₹2.15 lakh/mo | ₹5.19 crore | About ₹27,400 | About ₹82.2 lakh |
| 40 | ₹1.60 lakh/mo | ₹3.88 crore | About ₹38,800 | About ₹93.1 lakh |
Run your own version with your target income and age in our retirement planning calculator, or size just the SIP in the SIP calculator.
The real lesson: your starting age beats everything
Look at the last two columns of that table together, because they tell a story that feels almost unfair.
The 25-year-old is chasing the biggest corpus of all, ₹9.30 crore, yet invests only about ₹60 lakh of their own money to get there. The 40-year-old is chasing a much smaller ₹3.88 crore, but has to put in about ₹93 lakh. The person who starts early invests less of their own money and ends up with more than double the corpus. Compounding does the heavy lifting that your salary otherwise has to.
That gap is the pure cost of waiting. Every year you delay, the required SIP jumps and the share of the work left to your own pocket grows. You can see exactly what a few years of delay costs in our cost of delay calculator. If there is one takeaway from this whole article, it is this: the best day to start was years ago, and the second best day is today.
How to actually hit your number
The SIP figures above assume a flat amount for decades, which is not how most people earn. Here is how to make the target realistic.
- Start now, even if it is small. A smaller SIP started today usually beats a bigger one started in five years. Begin with what you can and raise it later.
- Step it up every year. Your income will grow, so grow your SIP with it. Increasing your SIP by even 10 percent a year sharply cuts the amount you need to start with. Model it in the step-up SIP calculator.
- Use direct plans. The commission inside regular plans can quietly eat lakhs over a 20 to 35 year horizon, so pick direct plans for the same fund.
- Do not touch it. This is retirement money. Raiding it midway resets the compounding you worked years to build.
- Review once a year. Check that your corpus is on track and adjust the SIP if your target income or timeline changes.
The bottom line
To enjoy the buying power of ₹50,000 a month at 60, you are really planning for a future income of ₹1.6 lakh to ₹3.8 lakh a month, and a corpus of roughly ₹3.9 crore to ₹9.3 crore, depending on your age today. The number sounds scary until you see the SIP behind it. Starting at 25 asks for about ₹14,300 a month. Every year you wait pushes that higher. Pick your row in the table, start the SIP this month, step it up each year, and let time carry most of the load.
To match the buying power of ₹50,000 a month at age 60, you would need roughly ₹3.9 crore to ₹9.3 crore, depending on your current age. A 40-year-old needs about ₹3.88 crore, while a 25-year-old needs about ₹9.30 crore because inflation has more years to raise future costs.
Because inflation runs for longer before they retire. At 6 percent inflation, ₹50,000 today becomes about ₹1.60 lakh a month in 20 years but about ₹3.84 lakh a month in 35 years. The longer runway means a higher future income, so a bigger corpus is needed to fund it.
Assuming 12 percent returns and retirement at 60, you would need about ₹14,300 a month if you start at 25, ₹19,700 at 30, ₹27,400 at 35, and ₹38,800 at 40. Starting earlier means a much smaller monthly SIP even though the target corpus is larger.
A rate of 6 percent is a sensible long-term planning assumption for India, since everyday costs like healthcare, education, and housing often rise faster than headline inflation. Using 6 percent keeps your plan realistic rather than leaving you short at retirement.
It depends on your withdrawal rate and returns. The figures here assume the corpus lasts 25 years, from age 60 to 85, with income rising for inflation and the pot earning 8 percent. For a longer life or extra safety, plan for a bigger corpus or a lower withdrawal rate.
No, but it costs more each year you wait. At 40 you would need about ₹38,800 a month for a ₹50,000 income goal, versus ₹14,300 at 25. Starting now, stepping up your SIP yearly, and staying invested still builds a strong corpus by 60.
