Why Prepayment Is a Guaranteed, Tax-Free Return

Every rupee of principal you prepay stops accruing interest at your loan rate from that day forward. Prepaying a 9% loan is mathematically identical to earning a 9% post-tax, zero-risk return — a yield no FD, debt fund, or guaranteed product matches. The only investments that beat it on expectation are equity-class assets, which carry real risk over the comparable horizon.

The honest comparison for surplus cash is therefore: loan rate (guaranteed) versus your realistic post-tax return elsewhere. At a 9% loan rate, a 7% FD (≈5% post-tax in the 30% bracket) loses clearly; a long-horizon index SIP averaging 11–12% may win — with volatility. Many households sensibly split surpluses between the two.

Timing Is Everything: The Amortisation Asymmetry

Because early EMIs are interest-heavy, identical prepayments save wildly different amounts depending on when they happen. ₹5 lakh prepaid on a ₹50 lakh, 20-year, 8.5% loan:

The same ₹5 lakh is 8× more powerful in year 2 than year 15. If you're past the loan's midpoint, surplus cash often serves you better invested than prepaid — run your own numbers above.

Tenure Reduction vs EMI Reduction — Always Take Tenure

After a prepayment, the bank offers two recalculations. The default many borrowers accept — a lower EMI over the same tenure — is the weaker choice:

• EMI reduction: monthly relief now, but the loan still runs full term; savings are modest.
• Tenure reduction (same EMI): the entire prepayment attacks future interest; total savings are typically 2–3× larger.

This calculator models tenure reduction — the EMI you already manage stays unchanged, and the loan simply ends sooner. Choose EMI reduction only if your monthly budget is genuinely strained.

The 2026 Foreclosure-Charge Rulebook

Prepayment penalties have been progressively dismantled by RBI:

• Floating-rate home loans to individuals: zero foreclosure/part-payment charges — long-standing rule.
• From January 1, 2026: the prohibition extends to floating-rate loans to individuals for any purpose, and to business loans to individuals and micro & small enterprises (with limited carve-outs for certain small lenders), for loans sanctioned or renewed on or after that date.
• Fixed-rate loans (most car, personal, two-wheeler): charges of 2–5% remain legal — check your Key Fact Statement, and weigh the penalty against this calculator's savings figure.

When Not to Prepay

1. No emergency fund: prepaid principal is locked; you cannot un-prepay during a job loss. Six months of expenses comes first.
2. More expensive debt exists: a 40% credit card balance or 16% personal loan always outranks an 8.5% home loan.
3. Old-regime tax math (case-specific): if Sec 24(b)/80C benefits effectively bring your home-loan cost near 6%, aggressive prepayment competes poorly with even conservative hybrid funds. Also note: selling or claiming-then-closing within 5 years of possession can reverse earlier 80C principal claims.
4. Final loan years: as the table above shows, late prepayments save little — liquidity is usually worth more then.

Frequently Asked Questions