Home Loan Prepayment vs Investing: Which Wins, and When
A bonus lands and the same argument starts at the dining table. One of you wants to knock Rs 5 lakh off the home loan. The other has read that equity returns 12% while the loan costs 8.5%, so prepaying is silly. Both of you have the wrong numbers.
The comparison is not 8.5% against 12%. It is the post-tax cost of the loan against a post-tax, risk-adjusted return you can actually get, and the answer changes depending on which year of the tenure you are standing in.
Every figure below is worked on Rs 50 lakh at 8.5% over 20 years — deliberately not the advertised floor. With the repo rate at 5.25%, lenders were quoting home loan floors of about 7.10% to 7.50% in early September 2026, but those go to the strongest salaried files. Run it on your own sanctioned rate; only the rupees change.
Key takeaways
- Prepaying Rs 5 lakh in year 3 of a Rs 50 lakh loan removes about Rs 13.2 lakh of interest. The same Rs 5 lakh in year 10 removes about Rs 5.7 lakh, and in year 15 about Rs 2.2 lakh.
- Cut the tenure, not the EMI. Same Rs 5 lakh in year 3: tenure reduction removes Rs 13.2 lakh of interest, EMI reduction removes Rs 4.5 lakh. That is an Rs 8.7 lakh decision made by ticking a box.
- RBI bars prepayment and foreclosure charges on floating-rate home loans to individuals. Fixed-rate loans still carry 2% to 4% of the outstanding.
- The new tax regime allows no Section 24(b) deduction on a self-occupied house, so the loan costs the full coupon. On the old regime, the Rs 2 lakh cap exhausts early on any loan above roughly Rs 25 lakh.
- Only equity plausibly beats a guaranteed 8.5%. A 6.5% fixed deposit at the 30% slab returns about 4.5% after tax, which loses to the loan by 400 basis points.
What the loan actually costs you after tax
Start with the honest cost, not the sanction letter rate. On Rs 50 lakh at 8.5% over 20 years the EMI is about Rs 43,391 and the total interest is about Rs 54.1 lakh — more than the loan itself.
The tax position then decides how much of that 8.5% you really pay:
- New regime, self-occupied. No Section 24(b), no Section 80C on principal. Your cost is the full 8.5%. Most salaried borrowers are now defaulted into this regime, so this is the common case and nobody tells them.
- Old regime, self-occupied, 30% slab. First-year interest on that loan is about Rs 4.2 lakh, but Section 24(b) caps the deduction at Rs 2 lakh. At a 31.2% effective rate that is Rs 62,400 of tax saved, which pulls the real cost down to roughly 7.2% in the early years — and back towards 8.5% as the interest component shrinks below the cap.
- Let-out property, old regime. The whole interest is deductible, but the loss set off against salary is capped at Rs 2 lakh a year under Section 71(3A). The rest carries forward eight years and often expires unused.
The Rs 2 lakh cap makes the deduction a fixed benefit, not a percentage one. On a large loan the marginal rupee of interest you prepay away carries no relief at all, so you save the full 8.5%.
What the alternative actually returns after tax
| Where the money goes | Headline return | Tax treatment | Post-tax return |
|---|---|---|---|
| Bank fixed deposit, large bank | 6% to 6.75% | Slab rate, 30% | 4.1% to 4.6% |
| Debt mutual fund bought after April 2023 | 6.5% to 7% | Slab rate | 4.5% to 4.8% |
| PPF | 7.1% | Exempt | 7.1% |
| EPF voluntary contribution | 8.25% | Exempt below Rs 2.5 lakh a year | 8.25% |
| Equity index fund, 10-year view | 11% to 12% | 12.5% LTCG above Rs 1.25 lakh | 9.6% to 10.5%, not guaranteed |
| Prepaying the home loan | 8.5% | None payable | 8.5%, guaranteed |
Read the last column, not the first. Prepayment is a risk-free, tax-free 8.5%. Deposit rates have followed the repo rate down and nothing guaranteed comes close except EPF, whose 8.25% is the last rate EPFO declared and is locked until you leave service. Equity wins on expectation by about 150 basis points — thin payment for a decade of volatility.
Why year 3 is worth six times year 15
An EMI is front-loaded with interest. In the first year of that Rs 50 lakh loan, roughly Rs 4.2 lakh of your Rs 5.2 lakh in EMIs is interest and only about Rs 1 lakh touches the principal. Prepay early and you kill interest that would otherwise compound for the remaining tenure. Prepay late and there is barely any left to kill.
| Rs 5 lakh prepaid at the end of | Outstanding then | Months cut from tenure | Interest you no longer pay |
|---|---|---|---|
| Year 1 | Rs 49.0 lakh | 48 | Rs 16.0 lakh |
| Year 3 | Rs 46.7 lakh | 41 | Rs 13.2 lakh |
| Year 5 | Rs 44.1 lakh | 36 | Rs 10.7 lakh |
| Year 10 | Rs 35.0 lakh | 24 | Rs 5.7 lakh |
| Year 15 | Rs 21.2 lakh | 16 | Rs 2.2 lakh |
Those are gross figures: interest that disappears from the schedule, before you subtract the Rs 5 lakh you handed over. The rate of return does not change with timing — a prepayment earns exactly your loan rate, 8.5%, whenever you make it. What changes is the size of the prize. Rs 5 lakh in year 3 removes Rs 13.2 lakh because seventeen years of compounding sit ahead of it; in year 15 it removes Rs 2.2 lakh because only five do.
Tenure reduction versus EMI reduction
The bank will ask which you want, and nine branches out of ten default you to EMI reduction because a lower EMI sounds like a favour. It is the expensive option.
| Rs 5 lakh prepaid at the end of year 3 | New EMI | Remaining tenure | Interest removed |
|---|---|---|---|
| Reduce the tenure | Rs 43,391, unchanged | 163 months | Rs 13.2 lakh |
| Reduce the EMI | Rs 38,750 | 204 months, unchanged | Rs 4.5 lakh |
Rs 8.7 lakh separates those two rows and the only difference is a tick box on a one-page form. Take tenure reduction unless the EMI is genuinely straining your monthly cash flow, in which case you have a cash flow problem rather than a prepayment decision, and a payment holiday is not the answer either.
The prepayment penalty question
The RBI has for years barred banks and housing finance companies from levying foreclosure or pre-payment charges on floating-rate term loans to individuals for non-business purposes. The Reserve Bank of India (Pre-payment Charges on Loans) Directions, 2025, issued on 2 July 2025 and applying to loans sanctioned or renewed from 1 January 2026, widened that to floating-rate loans taken by individuals and by micro and small enterprises. Part-payment and full closure are free, whatever the branch tells you. Two exceptions:
- Fixed-rate loans are outside the protection. Expect 2% to 4% of the amount prepaid, plus GST.
- Some lenders cap part-payments per year or set a minimum, commonly one EMI or Rs 25,000. That is contractual, not regulatory, and usually negotiable.
Ask for the revised amortisation schedule the same day and check the reduced tenure appears on it. Prepayments credited as advance EMI rather than principal are a routine and expensive error.
The case for keeping the loan
Prepaying is one-way. Once the money is with the bank you cannot call it back except by borrowing again, dearer and with fresh processing charges. Keep the loan when:
- You do not yet hold six months of expenses in cash. A prepayment cannot be eaten during a job gap.
- You are on the old regime with a let-out property and the interest deduction is actually being absorbed against rent.
- Your rate is already low relative to the market. A loan at 7.6% when fresh sanctions to your profile are at 8.5% is a cheap liability worth keeping. If it is the other way round, fix the rate before the balance: repricing or a transfer works on the whole outstanding, not on Rs 5 lakh of it.
- You have costlier debt. A personal loan at 13%, or a card balance at 36% annualised, clears before a home loan at 8.5%. This is not close.
Where both partners are co-owners and co-borrowers, work out whose income the prepayment comes from first — the deduction split follows the funding, as set out in the tax treatment of jointly owned property.
FAQ
Is it better to prepay a home loan or invest the money?
Prepay if your post-tax loan rate beats the post-tax return you can get with the same certainty. At 8.5% with no Section 24(b) relief, prepayment beats every guaranteed alternative — a 6.5% deposit nets about 4.5% at the 30% slab. Only equity, at roughly 9.6% to 10.5% after LTCG, plausibly wins, and it carries risk the loan does not.
Should I reduce the EMI or the tenure when I prepay?
Tenure, in almost every case. On Rs 50 lakh at 8.5% over 20 years, Rs 5 lakh prepaid at the end of year 3 removes about Rs 13.2 lakh of interest with tenure reduction and about Rs 4.5 lakh with EMI reduction. Cut the EMI only if the monthly outflow is genuinely unaffordable.
Can a bank charge a penalty if I close my home loan early?
Not on a floating-rate home loan to an individual: the RBI prohibits foreclosure and pre-payment charges on those. Fixed-rate loans sit outside that protection and typically carry 2% to 4%, plus GST.
Does prepaying reduce my tax benefit?
Only once your annual interest falls below the Rs 2 lakh Section 24(b) cap, and only on the old regime. Under the new regime a self-occupied house gets no deduction at all, so prepayment costs nothing in tax.
Is it worth prepaying in the last five years of the loan?
The return is still 8.5%, but the rupees are small. By year 15 of a 20-year loan, Rs 5 lakh prepaid removes about Rs 2.2 lakh of interest, against roughly Rs 1.2 lakh from a 6.5% deposit taxed at the 30% slab. That edge rarely justifies the lost liquidity.
Before you write the cheque
The rule that survives contact with reality: prepay in the first half of the tenure, take tenure reduction, keep a six-month buffer untouched, and if you cannot decide, split the money half to the loan and half to equity. Pull your outstanding balance and exact months remaining from the lender's app first. If a second purchase is also in the plan, our note on what you need upfront covers the cash a loan never funds; if you are weighing prepayment against releasing money from the same flat, the loan against property guide is the other half. Send us your figures and we will run both scenarios.
