One extra instalment a year takes about three years off a twenty-year loan. Raising the EMI 5% a year takes off nearly eight. Both work for the same reason — every rupee of prepayment removes not just that rupee of debt but every future month of interest it would have carried. The catch is what your bank does with the prepayment, and unless you tell it otherwise it will pick the option that saves you less.
What you still owe today.
Override it and the implied tenure is recomputed.
A whole instalment, usually out of a bonus.
Raise the instalment each year, as pay rises.
Reducing tenure saves far more. Banks default to reducing the EMI.
Zero if none.
Counted from now.
A flat amount added to every EMI.
This calculator needs JavaScript for live figures, but the worked example below is complete: on ₹50,00,000 at 8.5% with 20 years left, one extra EMI a year plus a 5% annual step-up closes the loan in 11 years 1 month instead of 20, saving about ₹23.3 lakh in interest.
From today, at these payments.
Off a 20 years remaining term.
43% of the ₹54.1 lakh you would otherwise pay.
Against Aug 2046 with no prepayment.
<strong>Reduce-tenure is selected</strong>, which is where the saving comes from: the instalment stays the same and the loan simply ends sooner. Banks commonly default to reducing the EMI instead, so this has to be asked for in writing.
One extra EMI a year and a 5% annual step-up closes this loan in 11 years 1 month instead of 20 years, saving ₹23.3 lakh in interest.
Against doing nothing
What the step-up commits you to
Balance outstanding, both ways
The loan is simulated month by month rather than solved with a formula, because an annual step-up changes the instalment mid-loan and no closed-form tenure survives that. Prepayments are applied to principal after the month’s regular interest and principal split — applying them first would flatter every result by a month of interest. A step-up takes effect after each twelve completed instalments. Indicative figures only. Actual EMI, interest and tenure vary with your lender’s rate resets, rounding method, prepayment charges and disbursement schedule. Not investment or financial advice. Floating-rate home loans to individuals carry no prepayment penalty in India, but fixed-rate loans can, and a lender may apply its own cut-off dates for when a payment is credited.
When a prepayment lands, the lender can do one of two things with it. It can keep your EMI the same and shorten the loan, or it can keep the end date the same and reduce your EMI. The money you paid is identical. The saving is not remotely identical, because interest accrues over time and the only thing that stops it is the loan ending.
On ₹50 lakh at 8.5% with twenty years left, one extra instalment a year reduces the term to about sixteen years nine months and saves roughly ₹10.3 lakh in interest. The same payments applied to reducing the EMI leave the loan running the full twenty years and save around ₹3.9 lakh. Same money, about ₹6.4 lakh of difference, decided by which box the bank ticks.
Most Indian lenders reduce the EMI by default, because a lower instalment is what customers say they want. Reducing tenure is usually available on request and is usually not offered. It has to be asked for, in writing, each time.
An annual step-up is the strategy people dismiss and it is arithmetically the strongest of the four here, because it compounds against the loan the way a salary compounds in your favour. Raising the EMI 5% a year — roughly ₹2,200 in the first year on a ₹43,391 instalment — takes a twenty-year loan down to around twelve years three months on its own. Nothing about that first increase feels significant, which is precisely the point.
It also matches how income actually moves. A step-up committed once, at a percentage rather than an amount, absorbs a pay rise before it becomes spending. The EMI-to-income calculator shows how much room the higher instalment leaves; if the answer is not much, the step-up is the strategy to pace rather than the one to skip.
Clearing an 8.5% loan is a guaranteed 8.5% return, after tax, with no volatility. That is a high bar for a portfolio to clear reliably, and it is why prepayment is not the obviously inferior choice it is often made out to be. The honest comparison depends on your marginal tax rate, whether you claim the interest deduction, and what return you would actually realise rather than the one in the brochure. The prepay-versus-invest calculator runs that comparison, and the arithmetic behind it is worked through in full.
If you are still working out the loan itself rather than how to end it, the home loan EMI calculator shows the instalment and the full schedule, and where your EMI money actually goes explains why the early years move the balance so little.
Reducing tenure saves substantially more interest, because interest accrues with time and a shorter loan simply stops accruing it sooner. On ₹50 lakh at 8.5% over twenty years, one extra EMI a year saves around ₹10.3 lakh if the tenure falls, against roughly ₹3.9 lakh if the EMI falls instead.
Most reduce the EMI unless you instruct otherwise, because a lower instalment is what borrowers tend to ask for. Tenure reduction is generally available on request but rarely offered, so it needs to be stated in writing at the time of each prepayment.
Floating-rate home loans to individual borrowers carry no foreclosure or prepayment charges. Fixed-rate loans can, and loans that have been converted between fixed and floating are worth checking, as is the lender’s cut-off for when a payment is credited against principal.
About three years and three months off a twenty-year loan, and roughly ₹10.3 lakh of interest on a ₹50 lakh balance at 8.5%, provided the tenure is reduced rather than the EMI. The saving comes from removing every future month of interest that principal would have carried.
A step-up raises your instalment by a fixed percentage each year, usually alongside pay rises. A 5% annual step-up alone cuts a twenty-year loan at 8.5% to about twelve years three months, because each increase attacks principal that would otherwise have accrued interest for the remaining term.
Yes, and it is the most effective time to do it, because the balance is at its highest and so is the interest each month carries. A rupee of principal removed in year one avoids far more interest than the same rupee removed in year fifteen.
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Calculator and assumptions last reviewed 17 August 2026.
This is an explanation of arithmetic, not advice about your money. TLDR Money is not a registered investment adviser and earns nothing from any product mentioned here. Figures are illustrative; your own numbers, taxes and circumstances will differ.