How to Calculate EMI on Any Loan – Simple Formula with Examples

Finance 7 May 2026 2 min read

Equated Monthly Installment (EMI) is the fixed monthly payment you make towards a loan — covering both principal and interest. Whether you are buying a home, a car or funding a wedding, knowing your EMI in advance is the single most important step in responsible borrowing.

The standard EMI formula

EMI = P × r × (1+r)^n / ((1+r)^n − 1), where P is principal, r is monthly rate (annual rate ÷ 12 ÷ 100) and n is total number of monthly installments. Indian banks use this reducing-balance method for almost all retail loans.

Worked example: ₹25 lakh home loan

At 9% per annum for 20 years (240 months): r = 0.0075, EMI ≈ ₹22,493. Total payable ≈ ₹53.98 lakh — meaning interest alone is ₹28.98 lakh. A 1% rate drop saves you over ₹3 lakh.

Why tenure matters more than you think

Doubling tenure roughly doubles the interest paid. A 20-year vs. 30-year home loan at the same rate can mean 60% more interest. Always model both scenarios using an EMI calculator before signing.

Prepayment power

Even one extra EMI per year on a 20-year home loan can knock 4-5 years off your tenure. RBI mandates zero prepayment penalty on floating-rate retail loans — use it.

Final word

Bookmark our EMI Calculator and try at least three (rate × tenure) combinations before any loan application. The 5 minutes you spend can save lakhs over the loan lifetime.

Related Tools

Car Loan Calculator
Car loans typically run for 3–7 years at fixed or floating rates. Knowing the EMI in advance helps you set the right budget, choose between on-road models and decide how much down payment to make. This calculator uses the standard EMI formula used by Indian banks and NBFCs.
EMI Calculator
An EMI (Equated Monthly Installment) is the fixed amount a borrower pays every month towards a loan. Each EMI has two parts — the principal (the amount you borrowed) and the interest charged by the lender. EMIs make repayment predictable and easy to budget. The InstantTool EMI calculator uses the standard reducing-balance EMI formula so the numbers match what most Indian banks and NBFCs quote, giving you a clear monthly figure before you sign any loan agreement.
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GST (Goods and Services Tax) is India's unified indirect tax on the supply of goods and services, charged at notified slab rates. Businesses, freelancers and shoppers all need quick GST math — whether to bill a client, verify an invoice, or split a tax-inclusive total. The InstantTool GST calculator does both forward (add) and reverse (remove) GST calculations and shows base, tax and total amounts side by side.
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A home loan is one of the largest financial commitments for most Indian families. Even small differences in interest rate or tenure translate into lakhs of rupees over 20–30 years. The InstantTool home loan calculator uses the same reducing-balance method as Indian banks and HFCs to show your EMI and total interest, so you can negotiate a better deal and pick the right tenure.

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