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Loan Prepayment Calculator

Calculate the interest you'll save and tenure you'll cut by prepaying your home loan, with a full amortization comparison. Free, instant.

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⚠️ Not financial advice. Results are illustrative only and should not be used as the basis for any investment, tax, or financial decision. Consult a qualified financial adviser or chartered accountant before acting on any figure shown.

₹
Monthly EMI
₹26,035
₹
Without prepayment
Loan tenure240 months
Total interest₹32,48,327
Total paid₹62,48,327
With ₹1,00,000 prepayment at month 12
Loan tenure222 months
Total interest₹28,74,823
Months saved18
Interest saved₹3,73,505
A one-time prepayment of ₹1,00,000 at month 12 saves you ₹3,73,505 in interest and closes the loan 18 months earlier.

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Why prepayment saves so much interest

Home loan interest is calculated on the outstanding principal each month. When you prepay, the principal drops sharply — meaning every subsequent EMI has less interest and more principal repayment. A ₹2 lakh prepayment on a ₹30 lakh, 20-year loan at 8.5% after three years saves about ₹5.6 lakh in interest and ends the loan roughly 29 months early if you keep the EMI unchanged. If you take the lower EMI instead (₹26,035 falls to about ₹24,178), the saving is about ₹1.8 lakh.

Reduce EMI vs reduce tenure — the maths

Both options save interest compared to no prepayment. Reducing tenure saves more because you exit the loan sooner, cutting off years of future interest accrual. Reducing EMI keeps you in the loan for the same period but with smaller payments — better for cash flow but less total savings. For most borrowers, reducing tenure is the right choice.

Tax implications

Home loan principal repayment (including prepayment) qualifies for Section 80C deduction up to ₹1.5 lakh per year. Interest paid qualifies for Section 24(b) deduction up to ₹2 lakh for self-occupied property. If you prepay aggressively, you may lose some of these tax benefits — factor this into your decision.

Best time in the loan tenure to prepay

The interest component of your EMI is highest in the early years of the loan. In the first year of a 20-year home loan at 8.5%, over 85% of each EMI goes toward interest and less than 15% toward principal. A prepayment in year 2–3 hits when the interest curve is steepest, saving the most over the remaining tenure. Prepaying in year 18 of a 20-year loan saves very little since most interest has already been paid.

RBI rules on prepayment charges

The Reserve Bank of India's Pre-payment Charges on Loans Directions, 2025 bar banks, housing finance companies and other regulated lenders from levying foreclosure or prepayment charges on floating-rate loans to individuals taken for non-business purposes, such as home loans. They apply to loans sanctioned or renewed from 1 January 2026 and replace the earlier circulars on the subject. Fixed-rate loans are left to each lender's policy, and charges of about 2–5% of the amount prepaid are common — check your loan agreement. Business loans and some personal loans can also carry charges that vary by lender and remaining tenure.

Prepayment vs lump-sum investment — a simple framework

Compare your home loan interest rate (after the tax benefit if applicable) against your expected post-tax investment return. If your effective loan rate is 7% (after 80C and 24b benefits) and your equity mutual fund SIP averages 12% CAGR post-tax, investing the lump sum likely wins over the long run. But investments carry uncertainty; prepayment gives a guaranteed, risk-free return equal to your loan rate. Many financial planners suggest prepaying if the loan rate exceeds 9%, investing otherwise.

Frequently asked questions

Should I prepay my home loan or invest the money?
Compare your loan interest rate against expected investment returns after tax. If your home loan is at 8.5% and you can get 12% post-tax returns in equity mutual funds, investing may be better. If the loan is at 10%+ or you have high-interest debt, prepayment wins. Also consider: prepayment gives guaranteed, risk-free savings; investment returns are uncertain.
Is it better to reduce EMI or reduce tenure when prepaying?
Reducing tenure (keeping same EMI) is almost always financially superior — you pay off the loan faster and pay less total interest. Reducing EMI improves monthly cash flow but extends the interest payment period. Unless you have an urgent cash flow need, choose 'reduce tenure.'
When is the best time to prepay a home loan?
The earlier in the tenure, the better. In the first few years, most of your EMI goes toward interest and very little reduces principal. A prepayment made in year 2 saves far more interest than the same amount prepaid in year 15. Use this calculator to compare different prepayment months.
Are there any prepayment charges?
RBI's pre-payment charges Directions, 2025 bar lenders from charging prepayment or foreclosure charges on floating-rate loans to individuals for non-business purposes (for loans sanctioned or renewed from 1 January 2026; earlier RBI circulars already covered floating-rate home loans). Fixed-rate loans are left to each lender's policy, and charges of about 2–5% of the amount prepaid are common. Always check your loan agreement before prepaying.
What is partial prepayment vs full prepayment?
Partial prepayment (part-payment) reduces the outstanding principal without closing the loan. Full prepayment (foreclosure) pays off the entire remaining balance and closes the loan account. This calculator models a partial one-time prepayment at a specific month and shows the cumulative benefit.

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