Interactive article
Home Loan Prepayment vs Investment: Where Should You Put an Extra ₹1 Lakh?
Last updated 2026-09-17 · First published 2026-09-17
Compare using extra rupees to prepay a home loan or to invest, with a live break-even return. Assumed investment returns are not guaranteed.
Quick answer
Put extra money on the home loan if you value a locked-in interest saving and a shorter (or cheaper) EMI, and you still have an emergency fund. Invest it only if you can live with the EMI, you will not need the cash soon, and you accept that the assumed return in the tool may not show up. The comparison below uses the same horizon and cash flows for both choices — it does not declare a winner.
Interactive comparison
Defaults are a ₹40 lakh outstanding, 8.5%, 15 years left, and an extra ₹1 lakh. Change every input. Formula EMI is shown unless you type your current instalment.
Loan and extra cash
Investment assumptions
Investment returns are assumed for illustration and are not guaranteed. Equity and debt market-linked products can finish below this rate, including with losses.
Option A — Prepay home loan
Extra applied to principal
₹1,00,000
Interest potentially saved
₹2,46,517
Potential tenure reduction
8 mo
Loan modelled to finish in 14 yrs 4 mo
Remaining interest before prepay
₹30,90,125
Remaining interest after prepay
₹28,43,608
Modelled net worth at horizon
₹3,24,462
Investments (freed EMIs / surplus) minus remaining loan
Option B — Invest extra money
Amount invested
₹1,00,000
Assumed return
10.00%
Investment duration
180 months
15 years at the assumed rate
Estimated future value
₹4,45,392
Estimated investment gain
₹3,45,392
Inflation-adjusted portfolio
₹1,85,847
At assumed 6.00% inflation
Modelled net worth at horizon
₹4,45,392
Grown extra cash minus remaining original loan
Side-by-side at the same horizon
| Prepay loan | Invest | |
|---|---|---|
| Extra payment / investment | ₹1,00,000 | ₹1,00,000 |
| Interest potentially saved / estimated gain | ₹2,46,517 | ₹3,45,392 |
| Tenure / EMI effect | 8 mo shorter | EMI unchanged |
| Estimated financial outcome (net worth) | ₹3,24,462 | ₹4,45,392 |
Difference between the two scenarios: ₹1,20,930
Under the assumptions entered, the investment scenario produces an estimated ₹1,20,930 higher financial outcome than the prepayment scenario.
Reducing loan interest is a more predictable benefit, subject to your actual rate, fees and whether the lender applies extra to tenure or EMI. Investment returns involve uncertainty — the rate you typed is an illustration, not a contracted yield.
Break-even investment return
7.83%
If the extra cash is invested instead of prepaid, the assumed annualised return would need to be about 7.83% for the invest scenario’s net worth at this horizon to match prepaying. This is not the same number as your home-loan rate: a lumpsum compounds from day one, while EMIs freed by an early payoff arrive later.
How home loan prepayment works
On a reducing-balance home loan, each EMI first covers interest on the outstanding principal. Extra rupees applied as a part-payment cut that principal immediately, so later months charge less interest. If you keep the EMI unchanged, tenure falls. If the lender recasts the EMI downward and keeps the end date, you save less interest. The part-payment calculator models the keep-EMI path in detail; this article adds the invest alternative and a break-even return.
How investing the extra money works
The invest path leaves the loan schedule untouched and grows the extra cash at the assumed annual rate you type, compounded monthly — the same convention as the compound interest calculator and a lumpsum. A SIP is a different cash-flow shape (monthly), useful if the extra money will actually arrive over time rather than as one part-payment.
Prepayment vs investment comparison
Interest saved and investment gain are not the same unit. Interest saved is loan interest you never pay. Investment gain is a modelled portfolio profit. The tool therefore also reports net worth at a common horizon: portfolio minus remaining loan. After an early payoff, EMIs you no longer send to the bank are treated as investable surplus. That is why the break-even return is not simply equal to the home-loan rate.
Example with ₹1 lakh and ₹5 lakh
Use the ₹1 lakh and ₹5 lakh chips on the tool. Larger part-payments cut more remaining interest and more months, but they also drain cash you might need for repairs, a job gap or school fees. Do not treat a larger saving number as permission to empty the emergency fund.
When prepayment may make sense
- You already hold 3–6 months of essentials in accessible cash or a short FD.
- The loan rate is high relative to any return you actually believe for the same risk.
- You sleep better with less debt than with a larger SIP.
- You are in the new tax regime, so old-regime interest deduction is not in play.
When investing may make sense
- The EMI is comfortable and the loan is a cheap, long, floating facility.
- The horizon is long and you can tolerate the assumed return not arriving.
- You need liquidity that a prepayment cannot reverse easily.
- Old-regime interest deduction still has room (capped at ₹2,00,000 for self-occupied in this site’s FY2026-27 config) and you have confirmed it applies to you.
Risk, liquidity, opportunity cost
Prepayment’s benefit moves mainly if your floating rate changes or the lender applies the extra differently than you asked. Investing’s outcome moves with markets. Liquidity: money sent to the lender is not a savings balance. Opportunity cost: rupees used to prepay cannot fund a child’s fee next year. Size the emergency fund first; this article will not tell you to drain it.
Tax, loan rate, and lender terms
Old-regime borrowers may deduct self-occupied interest up to ₹2,00,000 in the current tax configuration (FY2026-27 / AY 2027-28). Prepaying reduces interest and can shrink that deduction. New regime generally does not allow it — compare in the income-tax calculator. Floating-rate housing loans in India often have no prepayment penalty, but that is a feature of your agreement, not a number this page will invent. Ask the lender whether extra cuts tenure or EMI, and whether a charge applies on a fixed-rate loan.
Investment-return assumptions
The default 10% is an illustration, not a typical or promised SIP return. Move it to 0% to see a cash pile, or to 8% if you want something closer to many debt outcomes. The loan tenure calculator and home-loan EMI calculator help you sanity-check the loan side before you trust the comparison.
FAQs
There is no universal winner. Prepayment cuts interest you would otherwise pay, at your loan rate. Investing may grow faster or slower than that rate. Use the comparison on this page with your numbers and an assumed return you are willing to miss.
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Results are educational estimates, not tax, legal, investment, or medical advice, and not a loan offer. Verify filings and payments with the official authority or a qualified professional.