Does prepaying a home loan reduce the tenure or the EMI?

Either, and you generally have to say which. Shortening the tenure saves more interest; reducing the instalment frees monthly cash flow. Lenders do not always ask, so specify it in writing when you make the payment.

Is there a penalty for prepaying a home loan in India?

Not on a floating rate home loan taken by an individual, where lenders are barred from charging one. Fixed rate loans can carry a charge, and so can most personal loans, typically 2% to 5% of the amount prepaid.

Does the home loan deduction still exist under the new regime?

Not for a self-occupied property. The ₹2 lakh interest deduction is available under the old regime only, which means a borrower in the new regime is paying the full headline rate and gets more from prepaying.

Should I prepay before or after building an emergency fund?

After. A prepayment is irreversible and a house cannot be partly sold in a crisis, so clearing debt while holding no reserve tends to end with the same debt being taken again at a worse rate. Three to six months of expenses first, then this question.

Why does the return slider stop at 13%?

AMFI Best Practices Guidelines Circular 109/2023-24 caps the return used in any mutual fund illustration at 13%. It matters here because an inflated return assumption makes investing look like the obvious answer when the honest comparison is much closer.

Should the bonus clear the loan or buy an investment?

A prepayment pays your loan rate, certainly and tax free. An investment might pay more, uncertainly and after tax. And if you are in the old regime, the deduction means your loan costs less than its rate, which changes the bar.

Tax rules checked 20 August 2026

On your numbers

₹15.89 L

separates Invest it instead from Prepay the loan

On these numbers, investing is ahead by ₹15.89 L over the 17 years the money would be working either way. The prepayment side is certain; the investing side is not, and that difference is not in the arithmetic.

Prepay the loan: ₹13.20 L; Ends the loan 3y 5m early. Certain, and the saving is tax free.
Invest it instead: ₹29.09 L; Grows to ₹38.07 L over 17 years at 12%, before tax on redemption.

Under the new regime there is no deduction on home loan interest, so the full 8.5% is the bar the investment has to clear. That makes prepaying more attractive than it is for a borrower in the old regime, which is the opposite of what most people assume.

Side by side

	Prepay the loan	Invest it instead
Amount used	₹5,00,000	₹5,00,000
Gross benefit	₹13,19,639	₹33,06,539
Less deduction forgone	0	(₹3,97,692)
Net benefit	₹13,19,639	₹29,08,846
Certain?	Yes	No

The loan

Outstanding loan

Loan interest rate

Years remaining

Amount you have to deploy

Deploying it in year

Assumed return if invested

Which tax regime

Home loan interest is deductible up to ₹2 lakh a year on a self-occupied property under the old regime only. It changes the answer and most calculators ignore it.

What the prepayment does to the loan

Interest without it: ₹54.14 L
Interest saved: ₹13.20 L
Loan ends early by: 3y 5m

A prepayment is a certain, tax-free return equal to your loan rate. That is a higher bar than it looks: to beat 8.50% with certainty you would need an investment yielding rather more than that after tax, and nothing that yields more is certain.

Past performance may or may not be sustained in future and is not a guarantee of any future returns. The rate is capped at 13% p.a., being the mean of 10-year rolling returns of the Nifty 50 between 1 June 2013 and 30 May 2023 (12.93%), the basis AMFI prescribes for illustrations.

The 13% ceiling

Why this calculator stops at 13%

Many Indian return calculators let you type 20%, and some go to 30%. This one stops at 13%, which is roughly what the market has actually delivered over a decade.

What a decade actually returned

Nifty 50: 12.93%
Sensex: 12.64%
Gold, in rupees: 9.34%
10-year G-Sec: 7.20%

Mean of every 10-year rolling return between 1 June 2013 and 30 May 2023. Source: AMFI Best Practices Guidelines Circular 109/2023-24 of 1 November 2023, which sets these as the rates a mutual fund illustration in India may use. Nifty 50 at 12.93% is the highest of them, which is where the 13% ceiling comes from.

What a higher number would have shown you

Your settings above, ₹10,000 a month for 17 years, at three different assumptions.

At 12.0%, this page

₹66.79 L

At 20%, elsewhere

₹1.72 Cr

2.6× this page

At 30%, elsewhere

₹6.28 Cr

9.4× this page

The gap between those figures is not a return. It is an assumption.

12.93% is the average of every ten-year stretch in that period. Some stretches were better and several were a great deal worse, and you get one of them rather than the average of all of them. So a calculator set to 20% is not being optimistic. It is quietly moving the goalposts, because a higher assumed rate makes the monthly amount you need look smaller than it is. That is the one error in this arithmetic that costs you money, and it only shows up twenty years later, when the corpus is short.

AMFI sets this ceiling for every mutual fund illustration in India. It is also the number we would have picked.

How this is calculated

The prepayment side. The lump sum is applied to the loan in the year you choose, shortening the tenure while the instalment stays the same. The benefit is the interest never charged, which is certain and not taxable.

The investing side. The same lump sum compounds at your assumed rate for the years the loan would still have been running. The gain is then reduced by capital gains tax at 12.5% above the ₹1.25 lakh annual exemption, on equity treatment.

The correction nobody makes. Under the old regime, home loan interest is deductible up to ₹2 lakh a year on a self-occupied property. Prepaying removes interest you would have deducted, so it costs you that relief. The page subtracts it, and reports the effective loan rate the investment actually has to beat.

What this cannot tell you

One side is certain and the other is not, and the arithmetic cannot price that. The page shows two numbers as though they were comparable. They are not. A prepayment delivers exactly what it says; an investment delivers a distribution of outcomes of which the assumed rate is roughly the middle.

It applies one constant return across the whole period. Over seventeen years a real sequence includes years of decline, and if you would sell during one of those, the modelled outcome never happens.

It assumes the money genuinely goes into the investment and stays there. In practice, money not used to prepay is frequently money that gets spent, which is an argument for prepaying that has nothing to do with rates.

It ignores the ₹1.5 lakh Section 123 deduction on home loan principal, prepayment charges where a loan is fixed rate, and the possibility of refinancing at a lower rate instead of doing either.

Should I prepay my home loan or invest the money?

On the defaults here, investing is ahead by ₹15.89 lakh: a ₹5 lakh prepayment in year three of a ₹50 lakh loan at 8.5% saves ₹13.20 lakh of interest and ends the loan three years and five months early, while the same ₹5 lakh invested at 12% for the remaining seventeen years grows to ₹38.07 lakh, a gain of ₹29.09 lakh after tax.

That gap exists because 12% comfortably beats 8.5%. Narrow the assumed return towards the loan rate and the advantage disappears, and the certainty of the prepayment starts to matter more than the arithmetic does.

Why does a prepayment count as a certain return?

Because interest you never pay is money you keep, with no market risk and no tax. Prepaying a loan at 8.5% is economically the same as earning 8.5% after tax with complete certainty. Framed that way the bar is higher than it looks: to beat it you need an investment returning materially more than 8.5% after tax, and nothing that returns more than that is certain.

How does the tax deduction change the answer?

It lowers the effective cost of the loan, which lowers the value of prepaying it. Under the old regime, with a 30% slab and full headroom in the ₹2 lakh limit, a loan at 8.5% actually costs about 5.95%.

So the prepayment’s ₹13.20 lakh of gross saving becomes ₹9.24 lakh once the forgone deduction is counted, and the bar the investment has to clear drops from 8.5% to 5.95%. The counter-intuitive result is that the new regime makes prepaying more attractive, because there is no deduction to lose.

What return do I need for investing to win?

After tax, more than your effective loan rate, and by enough to justify the uncertainty. On the new regime at an 8.5% loan, an equity investment taxed at 12.5% on redemption needs roughly 9.7% before tax to break even. On the old regime with full deduction headroom the breakeven falls to about 6.8%. Both of those are before any allowance for the fact that one outcome is certain and the other is a projection.

Does it matter when in the loan I prepay?

Enormously. Interest is charged on the outstanding balance, so a prepayment early in the loan removes interest across many remaining years, while the same amount in year fifteen removes very little. On the defaults, prepaying ₹5 lakh in year three saves ₹13.20 lakh; the same amount in year fifteen saves a small fraction of that. Whatever you decide, deciding early is worth more than deciding correctly late.

Should the prepayment shorten the tenure or reduce the EMI?

Shortening the tenure saves considerably more, because the unchanged instalment keeps working against a smaller balance. Reducing the EMI keeps the original end date and frees up monthly cash flow, which is a liquidity decision rather than an arithmetic one. Most lenders offer both and default to whichever suits them, so it is worth asking explicitly. The home loan calculator shows the difference.

What if the loan is not a home loan?

Then prepaying almost always wins, and it is not close. A personal loan at 14% or a credit card at far worse carries no deduction and a rate no reasonable investment assumption beats. The interesting version of this question only exists for cheap secured debt, which in India means a home loan and sometimes an education loan.

Is there an answer that is not purely arithmetic?

Yes, and it is worth stating. Some people sleep better without debt, and that is a real return that does not appear in any table. Others will not actually invest the money they did not use to prepay. Against that, a prepayment is irreversible: money put into a house cannot easily be taken out again, whereas an investment can be sold in an emergency. Liquidity is the strongest argument for investing and it has nothing to do with returns.

Questions people ask about this

It depends on your loan rate, your assumed return, your tax regime and how much certainty is worth to you. On a 8.5% loan against a 12% assumed return, investing wins on the arithmetic. Narrow that gap and the certainty of prepaying starts to dominate.

Related calculators

Talk to the desk

This is a decision, not a calculation.

The arithmetic gives you a gap. Whether the certainty is worth more than the gap, and whether the money would actually be invested rather than spent, are the parts worth talking through. Bring your loan and the amount you are holding.

Talk to a human

Mutual Fund investments are subject to market risks; read all scheme-related documents carefully. Past performance does not guarantee future returns.

Calculator outputs are indicative projections on assumptions you select, not assurances, and not a projection of the performance of any scheme. Tax rules are those in force for FY 2026-27 under the Income-tax Act, 2025, checked on 20 August 2026.