The question every borrower asks
Once your EMIs are under control and you have an emergency fund, extra money each month raises a real dilemma. Prepaying the loan gives a guaranteed, risk-free return equal to your loan rate. Investing it could earn more, but with ups and downs. This calculator makes the comparison fair by spending exactly the same money in both paths:
- Path A (prepay): pay the extra toward the loan every month. When the loan closes early, start investing the full EMI plus the extra until the original end date.
- Path B (invest): keep paying the normal EMI and invest the extra in a SIP from day one.
At the end of the original tenure, both paths have zero loan, so comparing investments is comparing wealth.
Worked example
If your after-tax investment return > your effective loan rate → investing tends to win
If it's lower, or you want certainty → prepaying winsWhat the numbers don't capture
- Risk: the prepay path is guaranteed; the invest path assumes a steady return that real markets won't deliver. A bad decade near the end could flip the result.
- Peace of mind: many people value being debt-free years earlier, for good reason. Job loss is far less frightening without an EMI.
- Tax: under the old regime, home loan interest up to ₹2 lakh is deductible, which lowers your effective loan rate and favours investing. Under the new regime there's no such benefit for a self-occupied home.
- Liquidity: money invested can be withdrawn in an emergency; money prepaid into a loan usually can't, unless your loan has an overdraft facility.
A balanced approach
Many borrowers split the spare money: half to prepayment, half to a SIP. You get part of the guaranteed saving and part of the growth, and you can adjust the split as rates change. When loan rates rise, lean toward prepaying; when they fall, lean toward investing. See the full effect of prepaying on the loan prepayment calculator, and of investing on the SIP calculator.
Frequently asked questions
Is it better to prepay a home loan or invest in mutual funds?
If your expected after-tax return is clearly higher than your loan rate and you can handle market ups and downs, investing usually builds more wealth. If not, or if being debt-free matters to you, prepaying is the safer choice.
Should I prepay a personal loan or invest?
Almost always prepay. Personal loan rates of 11–24% are higher than what investments reliably earn.
What return should I assume for investing?
Use an after-tax figure. For long-term equity SIPs, 10–11% is a common planning number; use 8% to be cautious.