Flat rate against reducing balance, honestly
A reducing-balance rate charges interest on the outstanding, which falls with every EMI. A flat rate charges interest on the starting principal every month, even in the last month when most of the loan has been repaid. The two sound similar in the dealership but behave very differently on the schedule.
Take ₹8,00,000 at 10 per cent for 5 years. The reducing-balance EMI is ₹16,998. The flat-rate EMI, by the formula (P + P x r x t) divided by months, is (₹8,00,000 + ₹4,00,000) divided by 60, which is ₹20,000: a rounder number that papers over a higher real cost. Solving for the reducing-balance rate that produces the same ₹20,000 EMI gives 17.27 per cent. In other words, 10 per cent flat is close to 17.27 per cent reducing: a gap of over 700 basis points on the same car, same loan, same months.
If a dealer or manufacturer-finance arm quotes a flat rate, the most honest check is to run both modes on this page and compare the two EMIs. The gap is the real cost of the quoting convention.
Down payment is the lever that moves the EMI most
Three numbers set the EMI: the loan amount, the rate and the tenure. The rate is usually not negotiable; the tenure is often set by the lender's cap. The down payment is the input the borrower controls most, and it moves the EMI in a straight line because the loan moves in a straight line.
On a ₹10,00,000 car at a reducing-balance 10 per cent for 5 years, the EMI across down payment levels sits as follows:
| Down payment | Loan | EMI | Total interest |
|---|---|---|---|
| 10% | ₹9,00,000 | ₹19,122 | ₹2,47,340 |
| 20% | ₹8,00,000 | ₹16,998 | ₹2,19,858 |
| 30% | ₹7,00,000 | ₹14,873 | ₹1,92,376 |
| 40% | ₹6,00,000 | ₹12,748 | ₹1,64,894 |
Each additional 10 per cent of down payment cuts both the EMI and the total interest by the same proportion. The second-order argument is the opportunity cost of the down-payment cash: if that money is sitting in a savings account at 3 per cent while the loan runs at 10 per cent, the net is clearly in favour of putting more down.
Worked example at 20 per cent down
Car on-road at ₹10,00,000. Down payment at 20 per cent, so ₹2,00,000 up front. Loan of ₹8,00,000 at 10 per cent reducing balance for 5 years.
- Monthly rate: 10 divided by 1200, which is 0.008333.
- Months: 60.
- EMI from the standard formula: ₹16,998 (rounded to the rupee).
- Total paid over 60 months: ₹10,19,858.
- Interest in that total: ₹2,19,858.
- True cost of the car (down payment plus total EMIs): ₹12,19,858.
At a tenure of 3 years, the EMI rises to ₹25,814 but the total interest falls to ₹1,29,295. At 7 years, the EMI eases to ₹13,281 and the total interest rises to ₹3,15,600. The tenure table under the tool shows the three side by side.
How each input moves the answer
The levers, and what each one does on the default run:
- On-road price: scales everything in a straight line. Doubling the price doubles the loan, the EMI and the total interest, holding the other inputs.
- Down payment: each extra percentage point cuts the loan (and the EMI) by about one per cent of the price. Switch to a rupee amount for a fixed down payment regardless of price.
- Rate: a one-point rise lifts the EMI by about ₹390 on an ₹8,00,000, 5-year reducing loan. The effect is bigger at longer tenures.
- Tenure: a longer tenure cuts the EMI but adds interest, because the loan sits for longer. The 7-year interest total is nearly 44 per cent larger than the 5-year total on the same loan.
- Rate type: the single biggest step. A flat rate of 10 per cent is close to a reducing 17.27 per cent for 5 years. Always convert.
Repo rate and the retail rate
Most car loans today are fixed-rate at sanction, so a repo rate move during the term does not change the EMI. What it changes is the next cohort of borrowers' rates: a repo hike is usually followed by a lift in retail car loan rates, after a lag of a few weeks to a few months. The repo rate stands at 5.50 per cent after the 25 basis-points hike on 7 October 2026; the next MPC is in early December 2026. If you are shopping a loan right after a rate decision, check two or three quotes to see whether lenders have passed the change through yet.
The 2026 RBI rule on prepayment charges
The Reserve Bank's Pre-payment Charges on Loans Directions, 2025, in force from 1 January 2026, bar prepayment fees on floating-rate loans to individual borrowers for a non-business purpose. A car loan is almost always fixed-rate, so the rule does not block a prepayment charge on it. Before clearing a car loan early, read the sanction letter: a flat percentage of the outstanding is the usual scale, and many lenders also have a lock-in period inside which prepayment is barred altogether.
What this page leaves out
- Processing fees, documentation charges and GST on them; a car loan fee is often small in percentage terms but still real.
- Pre-paid insurance bundled into the loan, which some dealers package in; treat it as a separate up-front cost.
- A rate reset partway through the term; a fixed-rate car loan does not have one.
- Depreciation on the car itself, which is the larger economic cost of owning it; this calculator sizes only the financing side.
- The resale price at the end of the loan; that depends on the model, the mileage and the market when you sell.
Frequently asked questions
What is the difference between a flat rate and a reducing-balance rate?
A reducing-balance rate is charged on the outstanding balance each month, so interest shrinks as the loan runs down. A flat rate charges interest on the starting principal every month, regardless of repayment progress, which lifts the real cost well past the quoted number. A flat 10 per cent over 5 years is close to a reducing 17.27 per cent on the same loan.
How is a car loan EMI calculated?
Under reducing balance, by the standard formula: EMI equals P x i x (1 + i)^n divided by ((1 + i)^n - 1), where P is the loan, i is the monthly rate and n is the months. Under flat rate, EMI equals (P + P x r x t) divided by n, where r is the annual flat rate and t is the tenure in years.
How much should a down payment be?
The page does not tell a reader what to pay. Mechanically, each additional 10 per cent of the on-road price cuts the loan, the EMI and the total interest by about the same proportion. A larger down payment also helps where the lender caps the loan-to-value ratio or offers a lower rate to a lower LTV.
Does the car loan EMI include processing fees?
No. This page uses the loan amount, the rate, the tenure and the rate type. A processing fee is typically small for car loans and is paid up front from the borrower's own funds. The personal loan page on this hub models the fee effect in full.
Can a lender charge a prepayment fee on my car loan?
Usually yes. The RBI's 2026 ban on prepayment fees covers floating-rate loans to individual borrowers for non-business purposes; a car loan is almost always fixed-rate, so a foreclosure charge is still allowed. The sanction letter will state the percentage and any lock-in period.
Is car loan interest tax deductible?
Only where the car is used for a business or profession, in which case the interest is deductible as a business expense under the old regime, and depreciation on the car itself is also available. A personal-use car loan carries no deduction under either regime.
Does a longer tenure make the car cheaper?
No; it makes the EMI smaller but the total interest larger, because the loan sits on the books for more months. A 7-year tenure costs about 44 per cent more interest than a 5-year tenure on the same loan at the same rate.
Courses that teach the subject behind the car loan EMI calculator
Financial Market Beginners Module
Structured online preparation for the NSE NCFM Financial Market Beginners Module.
₹1,400 + 18% GST
Investment Adviser Level 1 SEBI NISM Series XA Certification
NISM Series XA Level 1 preparation for the investment adviser exam, with solved papers.
₹5,500 + 18% GST
Wealth Management Certificate Course
A wealth management course combining financial planning with NSE certification guidance.
₹1,950 + 18% GST
