Home Loan Prepayment Calculator — Save Lakhs in Interest

When the prepayment itself is free, and when it isn't

RBI's Directions state that regulated entities — commercial banks excluding payments banks, co-operative banks, NBFCs and All India Financial Institutions — "shall not levy pre-payment charges" on floating-rate loans granted to individuals for purposes other than business, with or without co-obligants, irrespective of the source of funds used for the prepayment or any lock-in period in the original agreement. That covers exactly the transaction this calculator models: paying down part of your outstanding balance from your own funds.

The applicability date matters for whether this calculator's result is the full cost picture. The Directions apply to loans and advances sanctioned or renewed on or after 1 January 2026. A floating individual home loan taken out before that date and not since renewed sits outside this specific protection — check your own loan agreement's prepayment clause before assuming zero charge, and if one applies, subtract it from the interest-saved figure this calculator shows before deciding whether prepaying beats other uses of the same cash. A fixed-rate loan is not covered by this floating-rate provision either, regardless of sanction date.

Same lump sum, two very different results — what actually drives the gap

This calculator offers two ways to apply a prepayment: reduce your EMI while keeping the original tenure, or keep your EMI unchanged and reduce the tenure. Both routes cut your outstanding principal by the identical prepayment amount on the day you make it — the difference in total interest saved comes entirely from what happens to your monthly payment afterward.

Reducing the EMI lowers what you owe each month from that point on, but it stretches the remaining schedule back out closer to its original length, so more months carry an interest charge on whatever principal is left. Reducing the tenure keeps your monthly payment at its pre-prepayment level, which means a larger share of every future EMI goes to principal rather than interest, and the loan closes sooner — fewer total months of interest accrual on the outstanding balance. For the same lump sum applied at the same point in the loan, the reduce-tenure route produces the larger total-interest-saved figure; the reduce-EMI route produces the larger month-to-month cash-flow relief. Which one is "better" depends on whether your goal is minimising total cost or lowering your monthly obligation — the calculator computes both so you can see the trade-off in your own numbers rather than a generic rule of thumb.

Does a lump-sum prepayment count toward your Section 80C limit the same as a scheduled EMI's principal?

Under the old tax regime, Section 80C gives a combined deduction limit of ₹1,50,000 that covers home loan principal repayment alongside life insurance premiums, PF contributions and other listed items — the Income Tax Department's own guidance describes this as covering principal repayment generally, without carving out scheduled EMI principal from a lump-sum prepayment. In practice that means a prepayment that reduces your outstanding balance is principal repaid, and can be counted toward the same ₹1,50,000 combined 80C ceiling as the principal component of your regular EMIs in that financial year — it does not get you a separate, additional allowance, and once your combined 80C claims for the year (across all qualifying items) hit ₹1,50,000, any further principal repaid that year — scheduled or prepaid — stops adding to your deduction.

None of this applies if you file under the new tax regime: Section 115BAC disallows Chapter VI-A deductions, which is where Section 80C sits, with a short list of exceptions that does not include home loan principal. A new-regime filer gets no tax deduction from a prepayment's principal component at all — the entire benefit of prepaying, for that filer, is the interest saved this calculator shows, with no separate tax-side reason to prefer a lump-sum prepayment in December over January beyond that interest math.

Work out your specific deduction position, including how much of your 80C room a prepayment would use up alongside your other claims, on this site's home loan tax benefit calculator.

Why the rate you prepay against is a moving number, not a fixed one

If your loan is floating — the majority of Indian home loans are, and have been required to be benchmark-linked for new sanctions since RBI's October 2019 external-benchmark mandate — the rate this calculator uses to project your interest saved is the rate today, not necessarily the rate for the rest of your tenure. RBI's Monetary Policy Committee has held the repo rate unchanged at 5.25% through its directly-confirmed June 2026 meeting; if the benchmark moves before you actually make the prepayment, re-run the calculator at the current rate rather than a rate you looked up weeks earlier — the interest-saved figure is sensitive to it, especially over a long remaining tenure where small rate changes compound.

Compare the prepay-now math against this site's home loan balance transfer calculator before committing a large lump sum — if your current lender's rate is well above what a transfer would get you, moving the loan first and prepaying against the new, lower rate can beat prepaying at your current rate outright, and RBI's same 2025 Directions mean neither move carries an exit charge on a qualifying loan.