You want to accumulate ₹4 crore for your son by the time he is 30 years old (5.5 years now plus 25 years). To plan for this, you would need to consider factors like the expected rate of return on your investments and how much you can invest regularly or as a lump sum.

For example, assuming an average annual return of 10% from equity mutual funds or other investments, you can calculate the monthly or yearly investment needed using a financial calculator or SIP (Systematic Investment Plan) calculator.

If you would like, I can help you understand approximate investment amounts or the kind of financial instruments suited for such a long-term goal.

For more personalized and detailed financial planning, you can also explore services like CNI InfoXchange’s market insights and expert calls to make informed investment decisions toward your goal.