Decisions

True Cost of a Car

Depreciation, interest, fuel, insurance, servicing and the return the money gave up — the whole cost of a car, not its instalment

About the True Cost of a Car calculator

Depreciation, loan interest, fuel, insurance, servicing, road tax and the return the money gave up - the whole cost of a car rather than its instalment. A ₹15 lakh car typically costs closer to ₹24 lakh over five years, and depreciation is the largest line, not fuel.

How the maths works

Economic cost of ownership

Depreciation + interest + fuel + insurance + servicing + other + opportunity cost

Depreciation

Purchase price minus resale value. The largest cost on almost every set of inputs, and the one nobody budgets for

Interest

Only the interest inside the EMI. The principal is capital and is already counted inside depreciation - a table with both an EMI row and a depreciation row is double counting most of the car

Opportunity cost

What every rupee would have earned had it stayed invested for the time it was gone. Use a deposit rate, not an equity rate - this is money you needed available

Why it adds up

Down payment + principal repaid + outstanding balance = purchase price, so everything paid less what you get back factors exactly into the rows above

A worked example

A ₹15 lakh car kept five years

Around ₹24 lakh in today's money - about 1.6 times the sticker price, or ₹40 a kilometre. Depreciation alone is ₹8.3 lakh of it. Keep the same car ten years instead of five and the cost per year falls by roughly a third.

How to use it

1. Enter the on-road price, the down payment and the loan
2. Enter how far you drive, the mileage and the fuel price
3. Add insurance, servicing, parking and road tax
4. Read the seven rows, the total, and the cost per kilometre

What it accounts for

• Seven cost lines that sum to the total with nothing counted twice
• Quotes the total in today's money as well as at the horizon, so it reads as a price rather than as a compounding artefact
• Cost per kilometre, which is the figure that makes a car comparable with a cab
• Shows what the same car costs per year if you keep it three, five, seven, ten or fifteen years
• Handles a cash purchase and a car sold before the loan ends

Why it is worth working out

• Replaces 'the EMI is affordable' with what the car actually costs
• Shows that keeping a car longer is the single largest lever available
• Makes a car comparable against cabs, a lease, or not owning one
• Puts a number on the down payment's opportunity cost, which no loan schedule shows

Questions people ask

Why is depreciation counted rather than the EMI?

Because an EMI is not a cost. Most of it is principal — money moving from your account into an asset you own — and counting it alongside depreciation would charge you twice for the same car. Depreciation is the capital the car actually consumes; interest is what the financing costs. Together they are the whole of it, and they never overlap.

What is opportunity cost doing in a car calculator?

A down payment and every instalment after it are rupees that could have been earning something. Over five years at 7% that is a real number, and it is invisible on a loan schedule. Use a deposit or liquid-fund rate rather than an equity return — this is money you needed available, not money you were investing. Set it to zero to leave it out entirely.

Why are two totals shown?

The rows add up to the total measured at the end of the period, because that is where the opportunity cost lands. Over fifteen years at an equity rate that arithmetic turns a ₹15 lakh car into a figure over a crore — correct, and unreadable as a price. The headline discounts the same total back to today, which is the number to hold against a sticker.

Does keeping a car longer really make it cheaper?

Substantially, and it is the largest lever on the page. Depreciation is front-loaded — a new car loses most of its value in the first three or four years — and the loan interest ends. Years six to ten of a car cost a fraction of years one to five. Nothing else here, not the mileage and not the fuel price, moves the annual cost as much.

Does this work for an electric car?

Yes: put the cost per kWh in the fuel price field and the km per kWh in the mileage field, and set depreciation higher — electric resale values have fallen faster than petrol so far. To compare the two side by side, the decision comparator has an electric-versus-petrol preset that runs both at once.

Is a car ever worth it on these numbers?

That is not a question arithmetic answers. A car buys time, privacy, and the ability to leave at 5am with a sleeping child in the back, and none of those has a price here. The calculator exists so the trade is made with the real figure in view, not so the answer is always no.

This calculator is for information and education. It is not financial advice — see the disclaimer.