Car Depreciation: What a New Car Loses in Five Years

Most people budget for the loan payment and the fuel. Depreciation never shows up on a statement, so it goes unnoticed until the day you try to sell. That is when five years of quiet losses arrive as a single number, and it is usually bigger than expected.

Year one does most of the damage

Take a $40,000 car and apply a common pattern: roughly 20% off in the first year, then about 13% of whatever is left in each year after that.

• End of year 1: $32,000, a loss of $8,000
• End of year 2: $27,800, a loss of $4,200
• End of year 3: $24,200, a loss of $3,600
• End of year 4: $21,050, a loss of $3,150
• End of year 5: $18,300, a loss of $2,750

Total loss over five years: $21,700, or about $362 a month. The first twelve months account for more than a third of it. That is why buying a two or three year old version of the same car keeps coming up as advice. Somebody else has already paid the steep part.

Why the drop is steepest at the start

A car stops being new the moment it is registered, and a large slice of the price was the newness. The remaining factory warranty shortens, the model year ages, and the buyer pool shifts from people who wanted a new car to people who wanted a cheap one. None of that has anything to do with how the car drives.

Straight line, declining balance, and which one fits

Cars lose value fastest early, so a declining balance method matches what actually happens. Business equipment often does not behave that way. A £6,000 espresso machine with a five year life and a £500 resale value at the end loses (6,000 - 500) ÷ 5 = £1,100 a year on a straight line. Same figure every year.

When straight line is the right choice

Use it when an asset wears out evenly and when you need a number that accountants will accept without argument. Use declining balance when the asset loses most of its value early: vehicles, laptops, phones. The calculator will run both, so compare them before you commit to one in a set of accounts.

Using the depreciation calculator

Four inputs do the work. Initial value comes off the purchase invoice, including delivery and options, since those depreciate too. Useful life is how long you will keep it, not how long it will physically last. Salvage value is what you expect at the end, which for a car means checking current listings for the same model at that age rather than guessing. Then pick a method and, for declining balance, a rate.

Run it twice. Once with the price you are about to pay, once with the price of the three year old version. If you are weighing owning against leasing, depreciation is most of what a lease payment is made of, which is covered in lease vs buy a car.

Common questions

Does a used car really depreciate more slowly? In dollars, yes. Buy the same car at three years old for $24,200 and apply the same 13% a year: after five more years it is worth roughly $12,100. That is a loss of $12,100, about $202 a month against $362 for the new one. In percentage terms the two are similar. In cash they are not close.

Does mileage matter more than age? Both, and they interact. A five year old car with 30,000 miles and one with 90,000 miles will not be valued the same, but a low-mileage car that has sat unused has its own problems. Age sets the ballpark, condition and mileage move it within that range.

Can I claim depreciation against tax? Only for business use, and the rules depend on where you file. US filers deal with MACRS schedules and Section 179 limits; UK businesses use capital allowances rather than accounting depreciation. The calculator gives you the economic picture, not a tax return.

How much car should I be buying anyway? Depreciation scales with price, so the cheapest way to lose less is to spend less. Setting a sensible ceiling first is the point of how much car can I afford, and it beats starting from a monthly payment target.