Prepay Your Home Loan or Invest the Money? A Worked Answer with Real EMIs
Prepaying a home loan earns a guaranteed return equal to your loan rate. Investing might earn more, but with risk. Here is how to compare them properly, with an amortisation worked out month by month.
By Pradeep RawalNISM-certified (Series XV & VIII) · Updated · 5 min read
Key takeaways
- Every rupee prepaid earns your loan's interest rate, guaranteed and tax-free in effect. At 8.5%, that is hard to beat with safe investments.
- Choosing a shorter tenure (same EMI) after prepaying saves far more interest than choosing a lower EMI, because the loan is cleared years earlier.
- In the old tax regime, interest up to ₹2 lakh a year on a self-occupied home is deductible, which lowers the loan's effective cost; in the new regime there is no such deduction.
- RBI rules do not allow banks to charge prepayment penalties on floating-rate home loans to individuals.
- Prepay only after an emergency fund is in place and high-interest debts (credit cards, personal loans) are cleared; keep long-term equity SIPs running if your loan rate is moderate.
A bonus, an inheritance or a maturing deposit lands in your account, and the question comes up: should this go towards the home loan, or into investments? Opinions are strong on both sides. The arithmetic is simpler than the opinions, as long as you compare like with like.
The example loan
Take a home loan of ₹50 lakh at 8.5% (floating) for 20 years. The EMI is ₹43,391, and over the full term you would pay ₹54.14 lakh in interest, on top of the principal. In the early years most of each EMI is interest: in the first year, ₹4,21,182 of the ₹5,20,694 you pay goes to interest.
What a ₹5 lakh prepayment does
Suppose you prepay ₹5 lakh after three years (36 EMIs). The lender will ask whether to keep the EMI and shorten the loan, or keep the end date and lower the EMI:
| Option | EMI after prepayment | Loan ends after | Total interest | Interest saved |
|---|---|---|---|---|
| No prepayment | ₹43,391 | 20 years | ₹54,13,879 | — |
| Prepay ₹5 lakh, keep EMI (shorter tenure) | ₹43,391 | 16.6 years | ₹40,94,240 | ₹13,19,639 |
| Prepay ₹5 lakh, lower EMI (same end date) | ₹38,750 | 20 years | ₹49,67,021 | ₹4,46,858 |
Keeping the EMI saves about ₹13.2 lakh of interest and finishes the loan 41 months early, more than 2.6 times the amount prepaid. Lowering the EMI saves much less, because the loan still runs its full course.
Prepaying vs investing: the fair comparison
Prepaying earns a guaranteed return equal to your loan rate, because every rupee prepaid stops being charged interest. Investing earns an uncertain return. So the comparison is your loan rate (after tax effects) against the after-tax return you expect from an investment of similar risk.
Step 1: find your effective loan rate
- New tax regime: no deduction for interest on a self-occupied home. Your effective rate is the full 8.5%.
- Old tax regime: interest up to ₹2 lakh a year is deductible under Section 24(b). In the first year of this loan, interest is ₹4,21,182, so the deduction covers only part of it. For a 30% taxpayer, the effective rate is roughly 7.2%, and it rises towards the full rate as the deductible share grows.
Step 2: compare with what the money could earn
If you invested the ₹5 lakh instead, for the remaining 17 years of the loan:
| Investment | Assumed return | Value after 17 years, after tax |
|---|---|---|
| Debt (FD/PPF-like), taxed at 30% | 7.0% | ₹11,12,343 |
| Equity (assumed), LTCG 12.5% | 11.0% | ₹26,45,615 |
Prepaying instead, keeping the EMI, ends the loan 41 months early. Investing the freed EMIs of ₹43,391 for those months at 7% builds about ₹20,03,243. A safe debt investment does not come close to that, which is why prepaying beats fixed deposits for almost everyone with a home loan above 7.5%. An equity investment may do better over 17 years, but only by taking equity risk, which prepaying does not.
If your effective loan rate is above the after-tax return you could earn on safe investments, prepaying wins for that money. Whether to prefer equity over prepayment is a separate risk decision, not a maths one: you are effectively borrowing at your loan rate to invest in equity.
A sensible order of priorities
- Emergency fund first. Money prepaid into a loan is hard to get back. Keep 6 months of expenses liquid; see the emergency fund guide.
- Clear expensive debt. Credit cards, personal loans and car loans cost more than a home loan. Prepay those first.
- Keep long-term SIPs running. Equity needs time; stopping SIPs to prepay can leave retirement under-funded.
- Then prepay with lump sums (bonuses, maturities), choosing a shorter tenure.
- In the old regime, consider keeping the yearly interest close to ₹2 lakh if that deduction matters to you, and prepay beyond it.
Practical steps
- Ask the lender for the prepayment process and confirm there is no charge (floating-rate loans to individuals must not carry one).
- Instruct in writing that the prepayment should reduce the tenure, not the EMI, if that is your choice.
- Collect the revised repayment schedule and check the new end date.
- When the loan closes, collect the original property documents and a no-dues certificate, and make sure the lien is removed.
Try your own loan in the EMI and prepayment calculator.
The bottom line
Prepaying a home loan is a guaranteed, risk-free return at your loan rate, and choosing a shorter tenure multiplies its effect. It clearly beats safe investments for most borrowers. Investing in equity instead can work out better over long periods, but it is a bet with your home loan as the funding. With an emergency fund in place and expensive debts cleared, a mix of both, steady SIPs and periodic prepayments, is a sound plan for most families.
Frequently asked questions
Is there a penalty for prepaying a home loan?
For floating-rate home loans taken by individuals, banks and housing finance companies cannot charge foreclosure or prepayment penalties under RBI and NHB directions. Fixed-rate loans may carry a charge; check your loan agreement.
Should I reduce EMI or tenure after prepaying?
If you can afford the current EMI, reduce the tenure: it saves the most interest. Reduce the EMI only if you need the monthly cash flow, for example after a drop in income.
What if my bank raised the rate but kept the EMI the same?
Lenders often extend the tenure when rates rise. RBI's 2023 framework requires them to inform you and give you the option to raise the EMI, extend the tenure, or prepay. Check your latest loan statement for the remaining tenure.
Does prepaying affect my tax deduction?
Yes, in the old regime. Lower outstanding principal means lower interest, and so a smaller Section 24(b) deduction. The calculation in this article accounts for that by using the after-tax interest rate.
Sources and further reading
About the author
Pradeep Rawal is an NISM-certified market professional (Series XV Research Analyst and Series VIII Equity Derivatives) with more than 15 years in personal finance and stock market education. He founded Financial Nirvana, wrote the book From Cubicles to Wealth Creation, teaches money and investing workshops, builds quantitative tools and backtesting systems, and writes about personal finance with the working shown.
This article is for education only and is not investment, tax or legal advice. Tax rules quoted are for the tax year 2026-27 (FY 2026-27) unless stated, and can change; check the latest position with the Income Tax Department or a qualified professional before acting. Examples use assumed returns that are not guaranteed.
