Home loan prepayment: when it saves vs when it doesn’t

TL;DR

Prepayment saves interest — but only if the opportunity cost of the prepaid cash is lower than the loan rate.
Floating-rate loans: no prepayment penalty under RBI rules. Fixed-rate: penalty typically 2-4%.
Partial prepayment of ₹1 lakh against a 20-year ₹50 lakh loan at 9% saves ₹2.1 lakh over the remaining tenor (or about 2.5 month reduction at same EMI).
Best ROI: prepay in the first 5 years, before the loan is front-loaded with interest.

The math

A home loan amortises — early EMIs are 70-80% interest, late EMIs are 70-80% principal. Prepaying in year 2 kills far more interest than prepaying in year 15 (by which time you’ve already paid most of the interest). For a 20-year ₹50L loan at 9%, ₹1L prepaid in year 2 saves ₹2.1L total; the same ₹1L in year 15 saves only ₹35k.

When NOT to prepay

If your investment return (after tax) exceeds your loan rate after Section 24B interest deduction. Example: loan rate 9.25%, Section 24B saves you 30% on ₹2L interest/year = effective cost ~6.5%. If equity mutual funds return 10-12% over your holding period, you’re better off investing the surplus. But factor in risk — equity is volatile, prepayment is certain.

Practical rule

Prepay enough to get your tenor under 15 years; park the rest in liquid funds or equity SIPs. This balances interest savings + flexibility. Read our tax benefits guide for effective cost calculation.

FAQs

Is there a minimum prepayment amount?

Varies by lender — typically 1x or 2x EMI as minimum. Some banks allow any amount online; some require branch visit for >₹1L prepayment. Read the fine print.

Prepayment vs EMI increase — which is better?

Prepayment is more flexible (you can’t reverse an EMI increase without refinancing). Same interest impact if amounts are equal.

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