Prepay Your Home Loan or Invest? A Simple Way to Decide
Updated 2026-10-26
You have some extra money. Your loan is charging 8.5%. Should you pay the loan down or invest the cash? The answer depends on your loan rate, how much risk you can take and how long you can wait.
What prepaying does
When you prepay, you cut your outstanding principal. Interest is charged on that principal every month, so a smaller balance means less interest. You then have two choices: keep the EMI the same and finish the loan sooner, or lower the EMI and keep the tenure. Keeping the EMI the same saves much more interest.
Prepaying earns you a guaranteed return equal to your loan rate. Every rupee you prepay at 8.5% stops costing you 8.5% a year, with no market risk.
For individuals with floating-rate loans, RBI rules bar prepayment penalties. Fixed-rate loans may charge a fee, so check your sanction letter.
What investing does
Equity funds have beaten 8.5% over long periods, but in some years they fall. A fall in the market just when you need the money is a real risk. Debt funds and fixed deposits give lower, steadier returns, often below your loan rate before tax. Gains are taxed, which lowers the real return further.
A worked example
You have a ₹50 lakh loan at 8.5% for 20 years. Your EMI is ₹43,391. After two years you receive ₹5 lakh and must choose.
Option 1: prepay ₹5 lakh and keep the EMI. Your loan, which would have run another 216 months, now finishes in about 171 months. That is 45 months, or nearly four years, sooner. You save about ₹14.6 lakh in interest. After the loan ends you also keep the EMI of ₹43,391 a month that you would otherwise have paid for those 45 months, about ₹19.5 lakh.
Option 2: invest ₹5 lakh. Suppose it grows at 9% a year for 18 years. It becomes about ₹23.6 lakh, a gain of ₹18.6 lakh before tax.
The two results are close. Both depend on assumptions, and the invested money carries risk. The prepayment result is nearly certain. If you could earn more than 9% safely, investing wins. If markets give you less, prepaying wins. Because the gap is small, the risk you can bear should decide.
A simple rule
- Loan rate above 9%: prepaying usually wins. You are paying more than most safe investments earn.
- Loan rate between 8% and 9%: it is close. Split the money, or prepay if you dislike debt.
- Loan rate below 8% and you have a long horizon: investing in a diversified equity fund can make sense, if you can stay invested through falls.
Whatever you choose, do these first:
- Keep an emergency fund of six months of expenses. Do not prepay with money you may need.
- Pay off higher-rate debt like credit cards and personal loans before the home loan.
- Take any tax benefits into account. The 80C and 24(b) deductions reduce your effective cost of borrowing a little in the early years.
A middle path
You can also split the money. Many people prepay a small amount each year, such as one extra EMI, and invest the rest through a regular plan. One extra EMI a year on the loan above would cut the tenure by about three years. On this loan, that means setting aside about ₹3,600 a month.
Try it yourself
Open our EMI calculator and look at the insights below it. It shows how much interest one extra EMI a year saves and how many months it takes off your loan. Change the rate, amount and tenure to match your loan, and see which option suits your numbers.