Home loan prepayment — how much interest you actually save (with examples)

Quick answer: prepaying ₹5 lakh in year 2 of a 20-year ₹50 lakh home loan at 8.5% saves you about ₹14 lakh in interest over the loan tenure. The earlier you prepay, the more you save — interest paid in year 1 is roughly 9× the interest paid in year 18 of the same loan. Most floating-rate home loans in India have zero prepayment penalty, so this is one of the highest-return moves available to most middle-class Indians.

How home loan EMI is structured

A home loan EMI looks the same every month — but the split between interest and principal changes dramatically over time. In the early years, almost all of your EMI is interest. In the late years, almost all of it is principal repayment.

Example: ₹50 lakh home loan, 8.5%, 20 years, EMI ₹43,391/month.

Year	Interest paid (year)	Principal paid (year)	Balance end of year
1	₹4,21,530	₹98,159	₹49,01,841
5	₹3,87,000	₹1,33,690	₹44,90,000
10	₹3,15,000	₹2,05,690	₹37,30,000
15	₹2,02,000	₹3,18,690	₹24,80,000
18	₹86,000	₹4,34,690	₹10,30,000
20	—	—	₹0

Notice: in year 1, you paid ₹4.21 lakh in interest. In year 18, only ₹86,000 — even though the EMI was identical. That's the power of how amortisation works.

Why early prepayment is so powerful

A ₹5 lakh prepayment in year 2 "kills" 5 lakh of principal balance, which means the bank stops charging interest on that 5 lakh for the remaining 18 years. At 8.5%, that's roughly:

• 5,00,000 × 8.5% × 18 years (approximate, simple) ≈ ₹7.65 lakh of interest saved on that one chunk
• After accounting for the actual amortisation curve, the realistic saving is ~₹14 lakh off the total interest

Same ₹5 lakh prepayment in year 15 would save only ~₹2.5 lakh, because the loan only has 5 years left. The earlier you can prepay, the more dramatic the saving.

The two ways to use a prepayment

When you prepay a chunk, the bank gives you two choices:

1. Reduce EMI — keep the same tenure, lower your monthly EMI.
2. Reduce tenure — keep the same EMI, finish the loan earlier.

Almost always pick "reduce tenure". The interest saving is dramatically higher because you stop paying EMIs sooner. "Reduce EMI" gives you breathing room in your monthly cash flow but throws away most of the prepayment benefit.

Example with the same ₹5 lakh prepayment in year 2:

• Reduce EMI: saves ~₹6 lakh interest, EMI drops to ~₹39,000
• Reduce tenure: saves ~₹14 lakh interest, loan ends 31 months early at original EMI

The same money, different financial outcomes.

When prepayment is the wrong move

Prepaying isn't always the right call. Skip prepayment if:

• Your home loan rate is 8% and you can earn 12% in equity SIPs. Long-term equity returns net of tax beat home loan interest. Putting the money in a SIP grows your wealth more.
• You haven't built a 6-month emergency fund. Liquidity matters more than interest savings. Don't drain your savings to prepay.
• You'll lose income soon (planned career break, baby, etc). Keep cash aside.
• You have higher-interest debt (credit card, personal loan). Pay those off first.

The clean rule: prepay only after you have a 6-month emergency fund, no credit card debt and have already maxed out PPF/ELSS deductions for the year.

How to fit prepayment into your annual plan

The classic Indian middle-class strategy:

1. Get bonus / salary increment in March-April
2. Pay any tax dues
3. Top up emergency fund to 6 months
4. Pay one extra EMI in April as a routine prepayment
5. Use any leftover bonus for a chunk prepayment of ₹1–5 lakh

If you prepay one extra EMI a year on a 20-year loan, you finish ~3 years early. Two extra EMIs a year — finish ~5 years early.

Use the EMI calculator to model prepayment

Open the EMI Calculator. Set your loan principal, rate and tenure. Note the total interest. Then reduce the principal by your planned prepayment amount and shorten the tenure. The interest reduction is your savings.

FAQ

Q. Is there a penalty for home loan prepayment in India? A. No — RBI rules ban prepayment penalties on floating-rate home loans for individuals. Fixed-rate loans may have a 2–4% penalty; check your sanction letter. Most home loans in India are floating, so prepayment is free.

Q. Should I prepay or invest in equity SIP instead? A. If your home loan rate (post-tax) is below the long-term equity return (post-tax), invest. Math: home loan at 8.5% with 80C/24b benefits ≈ ~6% post-tax cost. Equity SIP gives ~10–12% post-tax over 10+ years. Investing wins long-term. But for emotional security and risk reduction, prepayment is fine.

Q. How much prepayment is "enough" per year? A. Aim for one extra EMI per year minimum (typically ₹40–60k). Two extra EMIs is the sweet spot. Beyond that, the money is usually better invested.

Q. Can I prepay every month? A. Yes — most banks allow part-prepayment any time online. Some apps let you round up your EMI (e.g. pay ₹45k against a ₹43,391 EMI). The extra ₹1,609 every month is essentially a 4% step-up — it shaves 2-3 years off a 20-year loan.

Q. Will I lose tax benefits if I prepay? A. Slightly. Section 80C principal deduction (up to ₹1.5 L/year) and Section 24(b) interest deduction (up to ₹2 L/year for self-occupied) shrink as your loan shrinks. But the actual tax saving is much smaller than the interest saved. Net-net, prepayment still wins.