Home Loan EMI Calculator

You will repay the house, and then repay it again

A ₹50,00,000 home loan at 8.5% over 20 years costs ₹43,391 a month. Across 240 instalments that totals ₹1,04,13,879, of which ₹54,13,879 is interest — more than the ₹50 lakh you borrowed. The house costs one amount; the loan costs slightly more than the house again.

This is not a quirk of a particular lender. It is what happens when interest is charged on a large outstanding balance for two decades. No other consumer loan runs long enough for the interest to overtake the principal, which is why a home loan deserves more scrutiny than any other borrowing decision most people make.

A home loan EMI is the fixed monthly payment that clears the loan exactly over the agreed term. Each instalment covers the interest accrued that month on whatever is still outstanding, and whatever is left over reduces the principal. Because the outstanding balance falls slowly at first, the early years are dominated by interest — on this loan, the first year's ₹5,20,694 of EMIs includes roughly ₹4,21,182 of interest and only about ₹99,511 of principal repayment.

How the instalment is derived

EMI = P × r × (1 + r)ⁿ / ((1 + r)ⁿ − 1)

• P — the sanctioned loan amount, not the property price. If you put down 20% on a ₹62.5 lakh flat, P is ₹50 lakh.
• r — the monthly rate. 8.5% annual becomes 8.5 ÷ 12 ÷ 100 = 0.00708333.
• n — the number of monthly instalments: 240 over twenty years.

Working it through: (1.00708333)²⁴⁰ = 5.4222. Numerator: 50,00,000 × 0.00708333 × 5.4222 = ₹1,92,036. Denominator: 5.4222 − 1 = 4.4222. Divide: ₹43,391.

From there the schedule builds itself. Month one charges interest of 50,00,000 × 0.00708333 = ₹35,417, so only ₹7,974 of the EMI reduces the principal. Month two charges interest on ₹49,92,026, and so on. The principal portion grows by about 0.71% each month — imperceptible early, decisive late.

What the three levers actually do

Tenure. Shorten this loan from 20 years to 15 and the EMI rises to ₹49,237 — about ₹5,846 more a month, a 13% increase. Total interest falls from ₹54,13,879 to ₹38,62,656, a saving of ₹15,51,223. That is the single largest lever available, and lenders quote the longest tenure you qualify for precisely because the monthly figure looks gentler.

Rate. Because the loan runs so long, a difference that would be trivial elsewhere is large here. At 8.75% instead of 8.5% — a quarter of a percentage point — the EMI becomes ₹44,186 and total interest ₹56,04,529. That quarter point costs ₹1,90,650 over the loan. It is worth a week of shopping between lenders, and worth asking your existing bank to match a competitor before paying balance-transfer costs.

Down payment. Borrowing ₹45,00,000 instead of ₹50,00,000 drops the EMI to ₹39,052 and total interest to ₹48,72,491. An extra ₹5 lakh at the start saves ₹5,41,388 in interest — better than a guaranteed 8.5% return, tax-free, for money you were otherwise going to leave in a deposit.

When to run these numbers

Before you fix a budget. Work backwards from an EMI you can sustain, not forwards from what a lender will approve. Banks generally allow total EMIs up to 40–50% of net income; that is their risk appetite, not your comfort.

When comparing offers. Compare total interest, not the EMI, and add processing fees, legal and valuation charges and any mandatory insurance.

Before a prepayment. Early prepayment is unusually powerful on a home loan because the interest component is so front-loaded.

After any repo rate change. On a floating loan this usually changes your tenure rather than your EMI, silently.

Reading the output

The EMI is what your budget must absorb every month for two decades, through job changes, illness and children. Stress-test it: could you still pay if one income stopped for six months?

The total interest is the honest price of borrowing, and the figure most worth reacting to. At 108% of the principal here, it is the argument for a shorter tenure or a larger down payment.

What the EMI excludes is substantial. Stamp duty and registration run 5–8% of property value depending on the state — on a ₹62.5 lakh flat that is roughly ₹3–5 lakh, payable up front and not financeable. Add processing fees of 0.25–1% of the loan, legal and technical valuation charges, GST on those services, and for apartments, maintenance and corpus deposits. Budget these separately or the purchase stalls at the registration counter.

One reading people consistently get wrong: on a floating-rate loan, a rate rise usually does not change your EMI. Most Indian lenders hold the instalment constant and extend the tenure instead. Your statement looks identical while the loan quietly grows by months or years of pure interest. After any rate change, ask for the revised amortisation schedule rather than checking your EMI.

Where home loan borrowers lose money

Taking the longest tenure offered. It minimises the monthly figure and maximises the lifetime cost. Take the shortest tenure you can genuinely service.

Prepaying into the EMI rather than the tenure. When you make a lump-sum prepayment, most banks default to reducing the EMI. Ask instead to keep the EMI and cut the tenure — that removes the most expensive remaining months. On this loan, ₹5 lakh prepaid at the end of year three saves over ₹13 lakh if applied to the tenure.

Ignoring the tax position. Under the old regime, Section 24(b) allows up to ₹2,00,000 a year of interest on a self-occupied property and Section 80C covers principal repayment within its ₹1.5 lakh ceiling. Under the new regime, neither is available for a self-occupied house. Many borrowers still model an after-tax EMI that no longer exists for them.

Buying insurance bundled with the loan. Lenders frequently attach a single-premium loan protection policy financed into the principal, so you pay interest on it for twenty years. A separate term plan is usually far cheaper for the same protection.

Underestimating the down payment. The RBI's loan-to-value norms cap borrowing at roughly 75–90% of property value depending on the loan size, and the stamp duty sits on top. The cash needed at the start is routinely larger than buyers expect.

Assuming prepayment is always free. Floating-rate loans to individuals carry no foreclosure charges by regulation. Fixed-rate loans do, commonly 2–4%. Check the sanction letter before planning around early closure.

Treating the sanction as a target. Being approved for ₹70 lakh is not a reason to borrow ₹70 lakh. The EMI is contractually fixed for twenty years while income, health and employment are not, and that asymmetry is what turns affordable loans into distressed ones. ## Balance transfer: when moving the loan is worth it

Once a loan is running, the lever most borrowers forget is moving it. A balance transfer refinances the outstanding amount with a new lender at a lower rate, and on a long loan the arithmetic can be compelling: on a ₹40,00,000 outstanding balance with fifteen years left, dropping from 9% to 8.5% saves roughly ₹2.4 lakh in interest over the remaining term.

Against that, count the costs honestly. The new lender charges a processing fee, usually 0.25–0.5% of the loan. You pay fresh legal and technical valuation charges, stamp duty on the new mortgage in some states, and GST on the services. Realistically that is ₹25,000–₹60,000 on a loan of this size, plus several weeks of paperwork and a period where both lenders hold your documents.

The rule of thumb that survives scrutiny: a transfer is generally worth it when the rate gap is at least 0.5% and you have more than five years remaining. Below either threshold, the fees consume most of the benefit. Shorter remaining tenures are especially poor candidates because the interest component is already small by then.

Before transferring, ask your existing lender to match the rate. Many will, particularly for borrowers with a clean repayment record, since retaining a performing loan costs them nothing. A single phone call sometimes delivers most of the benefit of a transfer with none of the cost — and if it fails, you have lost nothing and can proceed with the move.