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Loan Prepayment Calculator

Calculate interest saved by prepaying your home loan.

⚠️ 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.

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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% in year 3 can save ₹3–4 lakh in total interest.

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 has clear guidelines: banks and housing finance companies cannot levy foreclosure charges or prepayment penalties on floating-rate home loans taken by individual borrowers. This rule has been in effect since 2012. Fixed-rate loans may still attract a prepayment penalty of 2–4% of the amount being prepaid — check your loan agreement. For personal loans, car loans, and business loans, prepayment charges typically range from 2–5% and 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?
As per RBI guidelines, banks cannot charge prepayment penalties on floating-rate home loans. Fixed-rate loans may have a prepayment penalty of 2–5% of the amount prepaid. Personal loans and car loans from some lenders charge 2–5%. 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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