Prepay the Home Loan or Invest the Surplus: How to Decide
A bonus, a matured deposit or the sale of shares leaves many home loan borrowers in Bangalore with the same choice. The money either reduces the loan or goes into an investment. This guide sets out how to compare the two in numbers, how the tax regime changes the sum, and when a split between both makes sense.
What a Prepayment Earns
A prepayment reduces the principal, and interest stops on that amount from the next day. The return is therefore equal to the interest rate on the loan. On a loan at 8.5%, every rupee prepaid earns 8.5% a year for as long as the loan would have run.
Two features make this return unusual. It is certain, since it does not depend on any market. It is also free of tax, because interest saved is not income.
What an Investment Has to Beat
An investment is ahead only when its return after tax is higher than the loan rate. The comparison is between the loan rate and the post-tax return, never the headline return. The table shows the pre-tax return needed to match a loan at 8.5% for an investor in the 30% slab.
| Where the money goes | Tax on the return | Pre-tax return needed to match 8.5% |
|---|---|---|
| Home loan prepayment | Nil | 8.5%, guaranteed |
| Bank fixed deposit | Slab rate, 31.2% with cess | About 12.4% |
| Equity mutual funds held over a year | 12.5% on gains above Rs. 1.25 Lakhs a year, plus cess | About 9.8% |
A fixed deposit does not pay 12.4%, so a deposit loses to prepayment for a borrower in the higher slabs. Equity funds may deliver more than 9.8% over a long period, but with sharp falls in some years and no assurance. The choice is therefore between a sure 8.5% and an uncertain return that needs to average close to 10% or more.
Why the Stage of the Loan Matters
The rate of return on a prepayment is the same in year 2 and in year 12. The difference is time: an early prepayment keeps earning that rate for many more years. A worked example shows the size of the gap.
Take a loan of Rs. 75 Lakhs at 8.5% for 20 years, as an illustration. The EMI is about Rs. 65,087 and the total interest over the full term is about Rs. 81.21 Lakhs. In the first year, about Rs. 6.32 Lakhs of the EMIs is interest and only Rs. 1.49 Lakhs is principal.
- Rs. 5 Lakhs prepaid at the end of year 2, EMI unchanged: the loan closes 31 months early and interest falls by about Rs. 15.57 Lakhs
- Rs. 5 Lakhs prepaid at the end of year 12, EMI unchanged: the loan closes 14 months early and interest falls by about Rs. 4.39 Lakhs
The same Rs. 5 Lakhs invested for 18 years would need to grow at 8.5% after tax to reach about Rs. 21.7 Lakhs, which is the equivalent result. Money invested instead of prepaid in year 2 has a long period to recover from weak years. Money invested in year 12 has less time, so the certain saving carries more weight late in the loan.
How the Tax Regime Changes the Sum
Under the old tax regime, interest on a self-occupied home is deductible up to Rs. 2 Lakhs a year. Under the new regime, which is the default, a self-occupied home earns no interest deduction at all. For a borrower in the new regime, the cost of the loan is the full rate, and nothing is lost by prepaying.
The old regime needs one more step. On the Rs. 75 Lakh loan above, yearly interest stays above Rs. 2 Lakhs until year 18. A prepayment before that point removes interest that was above the limit anyway, so the deduction is untouched and the full 8.5% is saved.
The deduction matters only on a small loan, or late in a large one, where the whole year's interest fits inside Rs. 2 Lakhs. There, each rupee of interest saved also gives up a deduction. For a borrower in the 30% slab, the effective loan cost falls to about 5.8%, and a safe investment has a fair chance of doing better.
Prepayment Charges
The Reserve Bank of India bars prepayment charges on floating rate loans given to individuals for purposes other than business. Its directions of 2025 apply this to loans sanctioned or renewed on or after 1 January 2026, for part and full prepayment alike. A fixed rate home loan may still carry a charge, so the sanction letter and the Key Facts Statement should be read first.
Most lenders accept a part payment online or at the branch, some with a minimum amount. The lender then asks whether to reduce the tenure or the EMI. Keeping the EMI and cutting the tenure saves more interest, while a lower EMI helps a household whose monthly budget is tight.
Reasons to Hold Money Back
Money paid into a loan is hard to get back. A top-up loan needs fresh approval and costs more than the home loan. Three reserves should be in place before any surplus goes to the lender.
- An emergency fund of about six months of expenses, EMI included
- Term life cover and health cover for the earning members
- Money for known expenses in the next two to three years, such as interiors, a vehicle or school fees
Costlier debt comes next. A personal loan, a car loan or a credit card balance usually carries a higher rate than a home loan, and clearing it first earns more. Employee provident fund contributions and other long-term commitments should also continue undisturbed.
When Each Choice Fits
The numbers and the borrower's own circumstances point one way or the other. Prepayment is usually the stronger choice in these cases.
- The loan is in its first half and the rate is 8% or more
- The borrower is in the new tax regime
- The alternative is a deposit or another fixed-income product taxed at the slab rate
- Income is uneven, or retirement is closer than the end of the loan
Investing the surplus has the better case in the situations below.
- The money will stay invested for ten years or more in equity funds, and falls in value along the way will not force a sale
- The loan is small or near its end, and the old regime deduction covers all the interest
- Reserves are thin and access to the money matters more than the interest saved
A Split Approach
Many borrowers divide the surplus instead of choosing one side. A common pattern is to send half of each bonus to the loan and half to a monthly investment plan. The loan shortens by several years, and a separate pool of savings builds alongside it.
A second pattern is to raise the EMI by 5% to 10% each year in line with salary growth. The effect is that of a steady prepayment without a large one-time payment. The EMI calculator shows how the tenure changes when the principal or the EMI is revised.
Steps Before Making the Payment
A short check keeps the prepayment clean in the lender's records. The steps are the same for a bank and a housing finance company.
- Confirm from the loan agreement that the rate is floating and that no prepayment charge applies
- Download the amortisation schedule and note the outstanding principal
- Give the instruction in writing: reduce the tenure, or reduce the EMI
- Collect the revised schedule and check the new closing date
- Check the next loan statement to see that the amount went to principal
A borrower who plans to close the loan in full should also ask for the list of original property documents held by the lender. Buyers still choosing a home, whether in Whitefield or Yelahanka, do well to pick an EMI that leaves room for regular prepayment.
