How does a home loan EMI work?
A home loan is the largest and longest borrowing most families ever take on, secured against the property itself. Because the tenure can run to 20 or 30 years, even a small change in the rate or term moves the numbers by lakhs. Your lender collects the loan back through a level monthly instalment that blends two things at once: a charge on the money still owed, plus a slice that chips away at the balance.
In the opening years almost all of your instalment is interest, because the outstanding amount is at its highest. As the years pass and the balance shrinks, the interest portion falls and the principal portion swells, even though the rupee figure you pay stays flat. That crossover is why prepaying in year three rescues far more interest than the identical amount prepaid in year fifteen.
What is the EMI on a ₹30 lakh, ₹50 lakh or ₹75 lakh home loan at 8.5%?
Because the instalment rises in step with the amount borrowed, one anchor figure lets you read off the rest: at 8.5% over 20 years, every ₹1,00,000 of loan works out to about ₹868 a month. The sting is in the total interest column — over two decades you can hand the bank almost as much in interest as the flat you bought.
On a ₹50,00,000 loan, for instance, the running total of interest crosses ₹54,00,000 across the full 20 years. Seeing that figure up front is usually what nudges buyers towards a larger down payment or a disciplined prepayment plan.
| ₹30,00,000 loan | ₹26,035 / mo · interest ₹32,48,327 |
| ₹50,00,000 loan | ₹43,391 / mo · interest ₹54,13,879 |
| ₹75,00,000 loan | ₹65,087 / mo · interest ₹81,20,818 |
Should you pick a longer tenure or prepay your home loan?
These are two opposite levers. Stretching the term shrinks the monthly outgo but quietly inflates the interest bill, since the bank is lending you money for more years. Take that same ₹50,00,000 at 8.5%: a 15-year term costs about ₹49,237 a month with roughly ₹38,60,000 of interest, a 20-year term drops the EMI to ₹43,391 but pushes interest past ₹54,00,000, and a 25-year term eases the EMI to ₹40,261 while the interest balloons beyond ₹70,00,000.
Prepayment pulls the other way. Putting ₹5,00,000 into the loan at the start of year two — and choosing to keep the EMI unchanged rather than lowering it — clears a 20-year ₹50,00,000 loan in about 16 years instead of 20, and pares the total interest from roughly ₹54,00,000 down to near ₹38,00,000. The rule of thumb: take the longest tenure you can qualify for to keep the EMI safe, then attack the principal with prepayments whenever a bonus or increment lands.
How much tax can you save on a home loan?
Under the old tax regime, a home loan carries two separate deductions. Section 24(b) lets you write off the interest you pay on a self-occupied home, up to ₹2,00,000 a year. Section 80C covers the principal you repay during the year, up to ₹1,50,000 — though that ceiling is shared with your other 80C claims such as EPF, PPF and life insurance, so it fills up quickly. The stamp duty and registration charges paid in the year of purchase can also sit inside that same 80C basket.
Two useful wrinkles: joint owners who are also co-borrowers can each claim both deductions on their own return, effectively doubling the household limits, and for a home still under construction the interest paid before possession is claimed in five equal yearly instalments once you get the keys. Note that the newer default tax regime generally withdraws these breaks for a self-occupied property, so the saving only lands if you have opted for the old regime — run your own numbers before counting on it.