What Prepaying Actually Does
- •Every rupee of principal removed stops earning the bank interest for the entire remaining term.
- •Shortening the tenure saves far more than lowering the EMI — often 3× as much for the same prepayment.
- •The earlier you prepay, the more you save, because early EMIs are almost entirely interest.
- •Floating-rate loans to individuals carry no prepayment charge under the RBI Directions, 2025.
The Real Problem This Solves
You have a lump sum — a bonus, a maturity payout — and the question is whether putting it into the loan is worth it. A plain EMI calculator cannot answer that, because it only tells you the monthly instalment on a fresh loan. It knows nothing about where you are in the schedule, and that position is the entire question.
There is also a second decision hiding inside the first. When you make a part-payment, the bank asks whether you want to keep the EMI and finish early, or keep the tenure and pay a smaller EMI. Most people pick the smaller EMI because it feels like the immediate benefit. It is by a wide margin the worse deal.
How Much Difference It Makes
Take a ₹50 lakh home loan at 8.5% over 20 years. The EMI is ₹43,391 and, left alone, the loan costs ₹54.14 lakh in interest — more than the loan itself.
Now prepay ₹5 lakh after two years, when ₹47.92 lakh is still outstanding:
Keep the EMI, shorten the tenure: the EMI stays ₹43,391, the loan closes 3 years 9 months early, and you save ₹14.57 lakh in interest.
Keep the tenure, lower the EMI: the EMI drops to ₹38,864, the end date does not move, and you save ₹4.78 lakh.
Same ₹5 lakh. The first choice is worth ₹9.79 lakh more — roughly three times the saving — purely because of how the bank applies it.
Timing matters just as much. That same ₹5 lakh saves ₹17.59 lakh if paid at the very start, ₹10.69 lakh at year 5, ₹5.71 lakh at year 10, and only ₹2.22 lakh at year 15. The prepayment does not change; the amount of remaining term it can act on does.
| ₹5 lakh prepaid after | Interest saved | Loan ends earlier by |
|---|---|---|
| 0 EMIs (at disbursal) | ₹17.59 lakh | 4 years 4 months |
| 12 EMIs (1 year) | ₹16.04 lakh | 4 years |
| 60 EMIs (5 years) | ₹10.69 lakh | 3 years |
| 120 EMIs (10 years) | ₹5.71 lakh | 2 years |
| 180 EMIs (15 years) | ₹2.22 lakh | 1 year 4 months |
Frequently Asked Questions
Should I reduce the EMI or reduce the tenure?
Reduce the tenure, unless you genuinely need the lower monthly outgo. Keeping the EMI the same means the extra amount continues attacking principal every month, so the loan closes years earlier. On a ₹50 lakh 20-year loan at 8.5%, a ₹5 lakh part-payment after two years saves ₹14.57 lakh by shortening the tenure but only ₹4.78 lakh by lowering the EMI. Lowering the EMI is a cash-flow decision, not a savings decision.
Can my bank charge me a penalty for prepaying?
Not on a floating-rate loan to an individual borrower. The RBI Pre-payment Charges on Loans Directions, 2025 bar prepayment and foreclosure charges on these, with no lock-in period and regardless of where the funds came from, and from 1 January 2026 the same protection extends to floating-rate business loans to individuals and micro and small enterprises. Fixed-rate loans can still carry a charge, and it must be disclosed in your sanction letter — so check which type you have before assuming.
Is it better to prepay the loan or invest the money instead?
Compare the loan rate against the return you would realistically earn after tax on the alternative. Prepaying a loan gives a guaranteed, risk-free return equal to the interest rate — a 8.5% home loan effectively pays you 8.5% tax-free. An investment has to beat that after tax and after allowing for the risk of not achieving it. This calculator shows the guaranteed side of that comparison; only you can judge the other side.
Does prepaying affect my Section 80C or 24(b) tax benefit?
It can. Home loan principal repayment counts toward the ₹1.5 lakh Section 80C limit and interest toward Section 24(b), both under the old tax regime only. Prepaying shrinks future interest, which can reduce the deduction you claim in later years. Under the new regime these deductions are not available anyway, so this consideration does not arise.
Is a small extra amount every month worth it?
More than most people expect, because it compounds against the principal every single month. On the same ₹50 lakh 20-year loan, just ₹5,000 extra per month from the start closes it 4 years 5 months early and saves ₹13.89 lakh in interest, for ₹9.35 lakh of extra payments. Use the "extra every month" mode to test your own figure.