How to calculate EMI on a car loan

Car loan EMI is the fixed monthly payment that covers both principal and interest. For a loan of P at monthly rate r over n months, EMI = P × r × (1+r)^n / ((1+r)^n − 1). The worked example below uses ₹800,000 at 9.5% for 60 months and yields EMI ₹16,801.49 from the calculator.

How car loan EMI works

Lenders amortize your loan so each installment stays the same while the mix shifts over time: early payments are interest-heavy, later payments clear more principal. The three inputs that set EMI are:

1. Principal (P): amount financed after down payment
2. Annual interest rate: convert to a monthly rate as r = annualRate / 12 / 100
3. Tenure (n): number of monthly payments

Formula and method

With monthly rate r and n months:

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

The calculator builds a month-by-month schedule from that EMI. Total interest is the sum of interest rows; total payment is principal plus that interest (rounding can make the last installment a few paise different from the steady EMI).

Worked example

Assume you finance a car with these figures:

Monthly payment ≈ ₹16,801.49. Over 60 months total ≈ ₹1,008,089.34, of which ≈ ₹208,089.34 is interest.

Those totals match the calculator for the same inputs, not a hand-rounded EMI × 60 that can drift by a few paise.

First three months of the schedule

Same run, no prepayment:

Month 1 interest is ₹6,333.33 because 800,000 × 9.5% ÷ 12 = 6,333.33. By month 3, interest has already edged down as the balance falls. That is reducing-balance amortization in practice.

How a bigger down payment changes EMI

Down payment does not appear as its own field: it shows up as a smaller principal. Keep rate and tenure fixed so the only change is how much you finance.

Example on-road price ₹1,000,000 at 9.5% for 60 months (illustrative price and rate for the math only, not a market quote):

Putting another ₹200,000 down cuts EMI from ₹16,801.49 to ₹12,601.12 and total interest from ₹208,089.34 to ₹156,066.96 (same rate and tenure, from the calculator on each principal). Whether that cash is better as a down payment or kept liquid is a personal call; the calculator only shows the EMI side.

What to ask a lender besides the interest rate

The rate sets the EMI formula, but the contract can still change what you pay in cash:

• Processing fee: often a flat amount or a percent of principal; ask whether it is deducted from disbursement or paid upfront, and whether it is refundable if the loan is cancelled. Do not assume a “typical” fee. Get the number in writing for your offer.
• Prepayment terms: can you pay extra each month? Is there a lock-in period or a charge above a threshold? Some products keep EMI fixed and shorten tenure; others rebuild EMI after a bulk prepayment. Model the “extra after EMI” path in how prepayment changes EMI and total interest, then confirm which model your lender uses.
• On-road price and insurance: know the full amount before you treat financed principal as final.
• Floating vs fixed: if the rate can reset, today’s EMI is a starting point, not a five-year guarantee.

None of those answers belong inside the EMI formula itself. List them next to the calculator result so the installment is not the only number you compare.

Try the EMI calculator

Enter your principal, rate, and tenure below. The tool updates the monthly installment, interest totals, and schedule in your browser.

How to use the result

• Treat EMI as one line in a budget, not the whole cost of the car.
• If you can afford a slightly higher EMI, a shorter tenure often saves more interest than hunting tiny rate differences. Compare tenures with the same principal and rate.
• If you plan monthly extras, check prepayment rules before you assume the interest saving from the calculator will stick.