Should Extra Money Prepay Your Home Loan or Go Into Investments — What Does the Maths Say?
Home Loans · Personal Finance · India, 2026
Should Extra Money Prepay Your Home Loan or Go Into Investments — What Does the Maths Say?
You have a spare lakh. The home loan sits there at 8.5 per cent, and the mutual fund app promises rather more than that. The comparison looks simple, and every version of it circulating online reaches for the same two numbers: prepaying saves you roughly Rs 4.23 lakh in interest, while investing turns Rs 1 lakh into roughly Rs 9.64 lakh over twenty years.
Both figures are arithmetically correct. Put side by side, they are also close to meaningless, because they are not measured in the same units. One is a saving spread across two decades; the other is a terminal value at the end of them. Comparing them directly is how a genuinely close decision gets made to look lopsided.
Quick Summary
On a Rs 50 lakh loan at 8.5 per cent over 20 years, the EMI is Rs 43,391 and total interest without prepayment is Rs 54.14 lakh. A Rs 1 lakh prepayment cuts the tenure by 12 months and saves about Rs 4.23 lakh of interest. That is a guaranteed, tax-free return equal to your loan rate. Investing the same Rs 1 lakh beats it only if your after-tax return genuinely exceeds 8.5 per cent a year, compounded for twenty years. It also matters that home loan rates now start around 7.10 per cent, and that prepayment charges on floating-rate loans were abolished from 1 January 2026.
The baseline, and whether it still holds
Start by confirming the numbers. On a Rs 50,00,000 principal at 8.5 per cent for 240 months, the monthly rate is 0.7083 per cent and the EMI works out to Rs 43,391. Multiply by 240 and you repay Rs 1.04 crore, of which Rs 54,13,878 is interest. You pay more in interest than you borrowed. That is the arithmetic of a long tenure, and it is the reason prepayment is worth thinking about at all.
One thing to check before you do anything else. The repo rate stands at 5.25 per cent after four cuts in 2025, and published home loan rates in 2026 run from about 7.10 per cent at the cheapest public sector banks to 8.45 per cent at the top of major lenders’ ranges. If you are still paying 8.5 per cent, a balance transfer may be worth more than any prepayment you are contemplating, and it now costs nothing to leave.
What the Rs 1 lakh prepayment actually buys
Prepay Rs 1 lakh and the principal drops to Rs 49 lakh while the EMI stays at Rs 43,391. Run the amortisation again and the loan clears in about 228 months instead of 240. You finish a full year early, and the interest you would have paid in that final year never arrives.
| Measure | No prepayment | Prepay Rs 1 lakh | Difference | Certainty | Liquidity |
|---|---|---|---|---|---|
| Principal | Rs 50,00,000 | Rs 49,00,000 | Rs 1,00,000 lower | Contractual | Money is gone |
| EMI | Rs 43,391 | Rs 43,391 | Unchanged | Contractual | No change |
| Tenure | 240 months | 228 months | 12 months shorter | Contractual | Frees cash sooner |
| Total interest | Rs 54,13,878 | About Rs 49.93 lakh | About Rs 4.23 lakh saved | Guaranteed | Not accessible |
| Effective return | Not applicable | 8.5% a year | Risk-free, tax-free | Certain | Locked in the house |
| Same sum invested | Not applicable | Rs 9.64 lakh at 12% | Market dependent | Not guaranteed | Redeemable |
The comparison the graphics get wrong
Here is the flaw. The Rs 4.23 lakh saving and the Rs 9.64 lakh future value are not comparable quantities. To compare them properly you have to ask what each option leaves you holding at the same moment in time, and that means accounting for something the prepayment story usually omits: after month 228 you are debt-free, and the Rs 43,391 that used to leave your account every month is now yours.
The like-for-like version, at month 240
Route A, prepay. The loan clears at month 228. You then invest the freed Rs 43,391 every month for the remaining twelve months. At 12 per cent that accumulates to about Rs 5,55,800 by month 240.
Route B, invest. Your Rs 1 lakh compounds untouched for the full twenty years, reaching about Rs 9,64,630, while you make all 240 EMI payments.
At the same date, investing is ahead by roughly Rs 4.09 lakh. That gap is real, but it exists only if 12 per cent actually materialises across two decades. The 8.5 per cent from prepayment is written into your loan agreement.
Notice what happened when the comparison was made properly. The headline gap shrank from a Rs 5.4 lakh rout to a Rs 4.1 lakh edge, and it became conditional. That is the honest shape of this decision: investing usually wins on expectation, prepayment always wins on certainty, and the size of the gap is smaller than the graphics imply.
The number that actually decides it
Strip away the presentation and the question reduces to one comparison. Prepayment pays you your loan rate, guaranteed, with no tax and no volatility. Investing has to beat that rate after tax to be worth the risk.
Two adjustments make the bar higher than it looks. Equity gains are taxed: long-term capital gains on equity are charged at 12.5 per cent above the annual exemption, so a 12 per cent pre-tax return over this period lands closer to 11.4 per cent after tax on these numbers. That still clears 8.5 per cent comfortably. But the 12 per cent itself is a long-run assumption, not a rate anyone is offering you, and a twenty-year sequence that averages 12 per cent will contain years that lose 30.
Tax changes the answer, and your regime decides how much
This is the variable most comparisons skip entirely, and it can move the break-even by more than a percentage point.
Under the new regime, prepayment is worth more than it used to be
Section 24(b), which allows up to Rs 2 lakh of home loan interest against a self-occupied property, and Section 80C for principal repayment, are both unavailable under the new tax regime. The new regime is the default and now carries most salaried filers. If you are on it, your loan costs the full 8.5 per cent and prepayment returns a clean, untaxed 8.5 per cent.
Under the old regime it is different. First-year interest on this loan is about Rs 4.21 lakh, of which only Rs 2 lakh is deductible. At a 30 per cent slab that is Rs 60,000 of tax saved, pulling the effective cost of the loan down to roughly 7.3 per cent and lowering the bar an investment has to clear. For a let-out property the interest deduction survives under both regimes, though loss set-off against other income is capped at Rs 2 lakh.
Timing matters more than the amount
A rupee prepaid in year three does far more work than the same rupee in year fifteen, because of how amortisation front-loads interest. On this loan the first EMI is about 82 per cent interest. By year fifteen it is 40 per cent, and by the final year barely 8 per cent.
The practical reading is that prepayment is at its most powerful in the first third of the tenure, which is unfortunately when most borrowers have the least spare cash. It also means that if you are fifteen years into a twenty-year loan, the case for prepaying weakens considerably, because the interest you would avoid is now a small slice of each instalment.
Two rules that changed recently
The Reserve Bank of India (Pre-payment Charges on Loans) Directions, 2025 took effect on 1 January 2026. Lenders can no longer levy prepayment or foreclosure charges on floating-rate loans taken by individuals for non-business purposes, including home loans. The exemption applies regardless of the loan amount, regardless of whether you use your own savings or a balance transfer, and with no minimum holding period.
The second is one your lender will not volunteer. When you prepay, most banks default to reducing the EMI rather than the tenure, which feels generous and saves you far less. Every figure in this article assumes tenure reduction with the EMI held constant. Ask for it explicitly and get the revised amortisation schedule in writing.
If your lender still charges you
A clause in an older agreement cannot be enforced against a floating-rate loan sanctioned or renewed after 1 January 2026 if it conflicts with the Directions. Write to the grievance redressal officer citing the Directions by name, and escalate free of charge to the RBI Ombudsman if that fails. Ask for an itemised closure statement so you can separate legitimate documentation costs from a foreclosure fee that should not exist.
The order of operations
Before either option, some things come first. This sequence is not about optimising returns; it is about not being forced to unwind a good decision at a bad moment.
Lean invest
Lean invest
Split it
Lean prepay
Prepay
Decoder: the terms that decide the outcome
| Term | What it means | On this loan | Why it matters |
|---|---|---|---|
| Amortisation | How each EMI splits between interest and principal | 82% interest in year 1 | Early prepayment saves far more |
| Tenure reduction | Keeping the EMI, shortening the loan | 240 to 228 months | Saves far more than cutting the EMI |
| Effective loan cost | Rate after any tax deduction | 8.5% new regime, 7.3% old | Sets the bar investments must clear |
| EBLR or RLLR | Repo-linked benchmark on floating loans | Repo at 5.25% | Resets at least quarterly |
| Balance transfer | Moving the loan to a cheaper lender | 7.10% available in 2026 | Free since January 2026 |
| Section 24(b) | Interest deduction, self-occupied | Capped at Rs 2 lakh | Old regime only |
| Equity LTCG | Tax on long-term equity gains | 12.5% above the exemption | Cuts the investing return |
| Sequence risk | Bad returns arriving at the wrong time | Not applicable to prepayment | Averages hide the order of returns |
Seven checks before you move the money
- Confirm your current rate against what lenders are offering today. A transfer may beat any prepayment, and it costs nothing.
- Check you have six months of expenses and EMIs liquid. Prepayment is irreversible; a home loan cannot be partially un-repaid.
- Establish whether you are on the old or new tax regime, and whether the property is self-occupied or let out.
- Confirm no debt in your name costs more than the home loan rate. If any does, it goes first.
- When prepaying, instruct the lender in writing to reduce the tenure and keep the EMI unchanged.
- Ask for the revised amortisation schedule and check the new closing date matches what you were told.
- If splitting, decide the ratio once and automate both legs, rather than re-deciding every time a bonus lands.
Habits that make either choice work
Frequently asked questions
Is it better to prepay a home loan or invest the money?
It depends on whether your after-tax investment return reliably beats your loan rate. Prepaying delivers a guaranteed, tax-free return exactly equal to your interest rate, on this example 8.5 per cent. Investing at an assumed 12 per cent leaves you roughly Rs 4.09 lakh better off at year twenty on a like-for-like basis, but only if 12 per cent actually happens. Below about 8.5 per cent, prepaying wins outright.
How much does prepaying Rs 1 lakh on a Rs 50 lakh home loan save?
About Rs 4.23 lakh in interest, and roughly twelve months of tenure. On a Rs 50 lakh loan at 8.5 per cent over 240 months, the EMI is Rs 43,391 and total interest is Rs 54,13,878. Prepaying Rs 1 lakh reduces the principal to Rs 49 lakh, and if the EMI is held constant the loan clears in about 228 months instead of 240.
Should I reduce the EMI or the tenure when I prepay?
Reduce the tenure in almost every case. Keeping the EMI unchanged and shortening the loan is what produces the interest saving; cutting the EMI instead leaves you paying for the full original term and saves far less. Most lenders default to reducing the EMI, so instruct them in writing and ask for the revised amortisation schedule to confirm.
Are there prepayment charges on home loans in India in 2026?
Not on floating-rate loans to individuals for non-business purposes. The Reserve Bank of India (Pre-payment Charges on Loans) Directions, 2025 took effect on 1 January 2026 and bar prepayment and foreclosure charges regardless of loan amount, source of funds or holding period. Fixed-rate loans may still attract charges depending on the lender, so check your sanction letter and Key Facts Statement.
When is the best time in the tenure to prepay?
As early as possible. Amortisation front-loads interest, so on this loan roughly 82 per cent of the first EMI is interest, falling to about 61 per cent by year ten, 40 per cent by year fifteen and 8 per cent in the final year. A prepayment in year three eliminates expensive interest; the same amount in year eighteen eliminates very little.
Does the new tax regime change the prepayment decision?
Substantially. Section 24(b) interest deduction and Section 80C principal deduction are not available under the new regime for a self-occupied property, so your loan costs the full headline rate and prepayment returns that rate untaxed. Under the old regime, the Rs 2 lakh interest deduction can cut the effective cost to roughly 7.3 per cent on this loan at a 30 per cent slab, which lowers the bar for investing.
Should I prepay before building an emergency fund?
No. Money used to prepay cannot be withdrawn if you lose your job or face a medical bill, and a home loan cannot be partially reversed. Six months of expenses plus EMIs in liquid assets should come first. Prepaying without that reserve raises the risk of having to borrow at a much higher rate later, which undoes the saving.
Is a balance transfer better than prepaying?
Often, and it should be checked first. Published home loan rates in 2026 start around 7.10 per cent while many older loans sit at 8.5 per cent or above. Moving a Rs 50 lakh loan down by a full percentage point saves more than most single prepayments and does not consume your capital. Since January 2026 there is no exit charge on floating-rate loans.
Can I do both instead of choosing?
Yes, and for most people that is the sensible answer. Splitting the surplus captures some guaranteed saving and some growth potential without requiring you to be right about twenty years of market returns. Decide the ratio once, automate both legs, and stop revisiting it every time a bonus arrives. Frequent re-deciding is where these plans usually fail.
What return do I need for investing to beat prepayment?
Your loan rate, after tax, sustained over the remaining tenure. On a loan at 8.5 per cent under the new regime, an investment must return more than 8.5 per cent after capital gains tax to be worth the risk. Under the old regime with a Section 24(b) deduction the effective loan cost falls to roughly 7.3 per cent, lowering the bar. Note that equity long-term gains attract 12.5 per cent above the annual exemption.
The short version
The two numbers everyone quotes are correct and not comparable. Prepaying Rs 1 lakh on this loan saves about Rs 4.23 lakh of interest and ends the loan a year early; investing the same amount at an assumed 12 per cent leaves you roughly Rs 4.09 lakh ahead at year twenty once you account for the EMIs the prepayment route stops paying. The first number is contractual, the second is a hope. What actually decides it is whether your after-tax return beats your loan rate, and three things you should settle before either: clear any debt costing more than the mortgage, hold six months of expenses liquid, and check whether a balance transfer at 7.10 per cent makes the whole question smaller. After that, splitting the surplus is a perfectly respectable answer.
