EMIs Explained: How Loan Repayments Really Work

What an EMI is made of

Each EMI has two parts: interest for the month on the outstanding balance, and a repayment of principal. The EMI amount is fixed, but the split shifts over time — early EMIs are mostly interest, later EMIs are mostly principal.

What changes your EMI

• Loan amount: a bigger loan means a bigger EMI and far more total interest.
• Interest rate: even 0.5% matters over 20 years.
• Tenure: longer tenure lowers the EMI but raises total interest sharply.
• Rate resets: on a floating-rate loan the lender usually changes the tenure, not the EMI, when the benchmark moves.

How much EMI can you afford?

A common rule is to keep all EMIs together under about 40% of your take-home pay, with a separate emergency fund of 3–6 months of expenses. Lenders use a similar 'FOIR' (fixed obligations to income ratio) test.

Prepayment: the biggest lever

1. Because interest is on the reducing balance, a prepayment removes all the future interest that principal would have attracted.
2. The earlier in the tenure you prepay, the bigger the saving.
3. On floating-rate home loans to individuals there is usually no prepayment penalty; check for fixed-rate loans.
4. Ask the lender whether a prepayment reduces your EMI or your tenure — reducing tenure saves more.

Step-up EMIs

If your income is set to rise, a step-up structure starts with a lower EMI that increases over time. It improves early affordability but costs more interest overall.