Home Loan Prepayment Calculator India — FY 2025-26

Q: Is there a penalty for prepaying a home loan in India?

For floating-rate home loans taken by individual borrowers, the RBI mandates zero prepayment penalty (applicable since 2014). This covers the vast majority of home loans in India. For fixed-rate home loans, banks may charge a penalty of 2-4% on the prepaid amount. Check your loan agreement for specific terms.

Q: Should I reduce tenure or reduce EMI after prepayment?

Reducing tenure saves significantly more interest over the life of the loan because you pay off the principal faster. Reducing EMI improves your monthly cash flow. Most banks reduce tenure by default. If you can comfortably afford the current EMI, always choose tenure reduction.

Q: Does prepaying affect my Section 24(b) and 80C tax deductions?

Yes. Section 24(b) allows up to ₹2,00,000 deduction on home loan interest under the old tax regime only. Prepaying reduces your interest outgo, which reduces this deduction benefit. Section 80C allows up to ₹1,50,000 deduction on principal repayment (including prepayment) under the old regime. Under the new tax regime, neither deduction is available.

Q: When is the best time to prepay a home loan?

The earlier, the better. Home loan EMIs are heavily front-loaded with interest in the early years. In a 20-year loan, roughly 60% of the total interest is paid in the first 10 years. Prepaying within the first 5-7 years creates maximum interest savings. Within a year, prepaying at the start of the financial year (April-May) maximizes savings.

Q: Should I prepay my home loan or invest in mutual funds?

Prepaying gives a guaranteed return equal to your loan rate (8.5-9.5%). Equity mutual funds historically deliver ~12% CAGR over 10+ years but with volatility. On the old tax regime at 30% slab, effective loan cost drops to ~6-6.5% after Section 24(b), making equity mathematically better. On the new regime, prepayment is more attractive. A balanced approach works best for most people.

Should you prepay your home loan or invest that money? Calculate interest savings from lump sum prepayment, compare prepaying vs equity SIP vs FD returns after tax, and plan optimal annual prepayments using your bonus. Accounts for Section 24(b) deduction impact and RBI zero-penalty rules on floating-rate loans.

Calculate how much interest you save by prepaying your home loan

Outstanding loan amount

₹

Current principal balance on your home loan

Current monthly EMI

₹

Your current equated monthly instalment

Remaining tenure

months

Number of months left on your loan

Interest rate

% p.a.

Current home loan interest rate

Lump sum prepayment

₹

One-time amount you want to prepay

After prepayment

Banks typically reduce tenure by default

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How to Use This Calculator

Prepayment Savings tab

Enter your outstanding loan amount, current EMI, remaining tenure, and interest rate. Then specify the lump sum prepayment you want to make and choose whether the bank should reduce your tenure or your EMI. The calculator shows how much interest you save and how your loan tenure or EMI changes after prepayment.

Prepay vs Invest tab

Compare three options for deploying your surplus money: prepay the home loan (guaranteed interest savings), invest in equity (higher expected returns with market risk), or park in a Fixed Deposit (lower but safe returns). The calculator accounts for LTCG tax on equity, FD interest tax at your slab rate, and optionally the Section 24(b) deduction benefit you lose by prepaying under the old tax regime.

Optimal Prepayment Plan tab

Plan annual prepayments (e.g. using your annual bonus) and see the year-by-year impact on your loan balance, remaining tenure, and cumulative interest saved. This helps you visualize how consistent prepayments dramatically reduce your loan burden over time.

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The Formula

Home loan prepayment calculations are based on the standard EMI and amortization formulas:

EMI Formula:
EMI = P × r × (1 + r)ⁿ / [(1 + r)ⁿ − 1]

Where:
P = Outstanding principal (loan balance)
r = Monthly interest rate (annual rate / 12 / 100)
n = Remaining tenure in months
EMI = Equated Monthly Instalment

After Prepayment (Reduce Tenure):
New principal = P − Prepayment amount
New tenure = log(EMI / (EMI − P' × r)) / log(1 + r)
Where P' = new outstanding principal

After Prepayment (Reduce EMI):
New EMI = P' × r × (1 + r)ⁿ / [(1 + r)ⁿ − 1]
Tenure remains the same

Interest Saved:
Interest saved = Total interest without prepayment − Total interest after prepayment

Effective Loan Cost (Old Regime with Sec 24b):
Effective rate = Loan rate × (1 − Tax slab rate)
Example: 8.75% × (1 − 0.30) = 6.125%

Reducing tenure saves more total interest than reducing EMI, because principal is repaid faster. In early loan years, most of your EMI goes towards interest (amortization front-loading), making early prepayments especially impactful.

Example

Rajesh — IT professional in Pune, ₹40 lakh home loan, ₹5 lakh annual bonus

Rajesh is 32, works at an IT company in Pune, and has a home loan of ₹40,00,000 at 8.75% with 15 years (180 months) remaining. His EMI is ₹39,926. He receives an annual bonus of ₹5,00,000 and wants to know whether to prepay or invest.

Step 1: Prepayment impact

Outstanding loan₹40,00,000

Lump sum prepayment₹5,00,000

New outstanding₹35,00,000

Interest rate8.75% p.a.

Step 2: Savings with tenure reduction

Original remaining tenure180 months (15 years)

New tenure after prepayment~150 months (12.5 years)

Tenure reduced by~30 months (2.5 years)

Interest saved~₹8,50,000

Step 3: Prepay vs Invest comparison

Option A: Prepay loan₹8.5L saved (guaranteed)

Option B: Equity (12% CAGR)~₹14.7L post-tax gains

Option C: FD (7%, 30% slab)~₹5.1L post-tax gains

Step 4: Annual prepayment plan

₹3L/year for 5 years₹15,00,000 total prepaid

Loan balance after 5 years~₹16,50,000 (vs ₹29L without)

Tenure reduction~6-7 years shorter

Total interest saved~₹18-20 lakh

For risk-averse Rajesh, prepaying makes strong sense: guaranteed ₹8.5L savings, no market risk, and the psychological benefit of being debt-free sooner. If he has higher risk appetite and a long horizon, equity investing at 12% CAGR yields more. The optimal strategy: split — prepay some and invest the rest.

FAQ

Is there a penalty for prepaying a home loan in India? ▼

For floating-rate home loans taken by individual borrowers, the RBI mandates zero prepayment penalty (applicable since 2014 for all banks and HFCs). This covers the vast majority of home loans in India since most are on floating rates. For fixed-rate home loans, banks may charge a penalty of 2-4% on the prepaid amount. Check your loan agreement for specific terms. Non-individual borrowers (companies, trusts) may face penalties regardless of rate type.

Should I reduce tenure or reduce EMI after prepayment? ▼

Reducing tenure saves significantly more interest over the life of the loan because you pay off the principal faster, reducing the total interest charged. Reducing EMI improves your monthly cash flow, which can be useful if you have other financial commitments. Most banks reduce tenure by default. As a rule of thumb: if you can comfortably afford the current EMI, always choose tenure reduction. If you need breathing room in your monthly budget, choose EMI reduction.

Does prepaying affect my Section 24(b) and 80C tax deductions? ▼

Yes, both deductions are impacted. Section 24(b) allows up to ₹2,00,000 deduction on home loan interest for self-occupied property under the old tax regime only. Prepaying reduces your interest outgo, which reduces this deduction benefit. Section 80C allows up to ₹1,50,000 deduction on principal repayment (including prepayment) under the old regime. The prepayment amount itself can be claimed under 80C in the year of payment. Under the new tax regime, neither Section 24(b) nor 80C deductions are available, so prepaying has no tax impact — you simply save on interest.

When is the best time to prepay a home loan? ▼

The earlier, the better. Home loan EMIs are heavily front-loaded with interest in the early years. In a 20-year loan, roughly 60% of the total interest is paid in the first 10 years. Prepaying early reduces the principal on which future interest is calculated, creating a compounding effect of savings. For maximum impact, prepay within the first 5-7 years of your loan. Prepaying near the end of the tenure saves relatively little interest since most of the interest has already been paid. Within a year, prepaying at the start of a financial year (April-May) maximizes the interest savings for that year.

Should I prepay my home loan or invest in mutual funds? ▼

This depends on your risk tolerance, tax regime, and loan rate. Prepaying gives a guaranteed return equal to your loan rate (8.5-9.5% typically). Equity mutual funds have historically delivered ~12% CAGR over 10+ years, but with significant short-term volatility. If you are on the old tax regime at 30% slab, your effective home loan cost drops to ~6-6.5% after Section 24(b) deduction, making equity a mathematically better choice. On the new tax regime, with no deduction, the effective loan cost equals the nominal rate, making prepayment more attractive. For most people, a balanced approach works best: maintain an emergency fund, invest via SIP for long-term goals, and use windfalls (bonuses) for partial prepayments.

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