Prepay your home loan or invest the money? How to decide
By the LoanReveal team · Updated 13 October 2026 · 6 min read
Short answer: prepaying gives you a guaranteed, tax-free return equal to your loan rate. Investing wins only if your expected return after tax is clearly higher, and you can live with the ups and downs.
With ₹5 lakh against a ₹40 lakh home loan at 8.5% (18 years left), prepaying saves about ₹13.9 lakh of interest and ends the loan 4 yrs 4 mos early. Investing comes out ahead only above about 8.79% a year after tax.
How to compare the two fairly
Looking only at "interest saved" isn't enough. A fair comparison asks: at the end of the original loan, where do I have more money?
- Invest: the ₹5 lakh grows at your expected return for the whole period, and the loan runs as normal.
- Prepay: the loan closes early. From then on, the EMI you no longer pay is invested every month until the original end date.
Because prepaying frees up EMIs that can be invested later, the break-even return is slightly above your loan rate, not equal to it.
Worked example
₹40 lakh outstanding at 8.5%, 18 years left, ₹5 lakh available today. Your wealth at the end of the 18 years:
| Interest saved by prepaying | ₹13.9 lakh |
| Loan ends early by | 4 yrs 4 mos |
| Break-even return (after tax) | 8.79% |
| Return you earn (after tax) | Prepay, then invest freed EMIs | Invest ₹5 lakh now |
|---|---|---|
| 6% a year | ₹21.5 lakh | ₹14.3 lakh |
| 10% a year | ₹23.4 lakh | ₹27.8 lakh |
| 12% a year | ₹24.3 lakh | ₹38.4 lakh |
At FD-like returns, prepaying clearly wins. At 10% to 12% a year, investing comes out ahead on paper, but those returns are not guaranteed, while the loan saving is.
What the numbers don't show
- Tax: compare with your after-tax return. FD interest is taxed at your slab rate; equity gains are taxed too. And if you claim home loan interest deductions under the old tax regime, your effective loan rate is lower, which makes prepaying slightly less attractive.
- Risk: equity returns can be negative for years. A prepayment can never lose value.
- Liquidity: money prepaid into a loan is hard to get back. Keep an emergency fund of 6 months of expenses first.
- Peace of mind: being debt-free earlier has real value, especially close to retirement.
A simple way to decide
- Emergency fund in place? If not, build that first.
- Any costlier debt (credit card, personal loan)? Pay that off before the home loan.
- Expected after-tax return well above the break-even, and you can hold for many years? Investing may make sense.
- Unsure, or the gap is small? Prepay, or split the money between both.
Run your own numbers
The prepay vs invest calculator shows both outcomes and the break-even return for your loan. If you decide to prepay, use the reduce EMI or tenure calculator to choose how.
Frequently asked questions
Is it better to prepay a home loan or invest in mutual funds?
It depends on the after-tax return you expect and the risk you can take. Prepaying earns your loan rate with no risk. Equity funds may earn more over long periods, but with no guarantee. Many people split the money between both.
Should I prepay if I get a tax benefit on home loan interest?
The deduction (available under the old tax regime) lowers your effective loan rate, so prepaying saves a little less. It's still worth comparing with your realistic after-tax investment return.