Car Depreciation Explained: How to Estimate It Yourself

Depreciation is the value a car loses while you own it: what you paid minus what it is worth when you sell or trade. You never get a bill for it, so it is easy to ignore, but for many new cars it costs more over the first several years than fuel, insurance or maintenance. It is also the cost you have the most control over, because it is largely decided by what you buy, when you buy it and how long you keep it.

How it works

A car's value falls for three reasons: it ages, it accumulates miles and wear, and newer versions arrive. The fall is not even.

• The first years are the steepest. A new car becomes a used car the day it is registered, and buyers pay less for used. The decline in dollars per year is typically largest early and then flattens.
• The middle years are gentler. Value keeps falling, but by smaller amounts each year.
• Late in life, condition takes over. An old car's value depends mostly on whether it runs well, has been maintained and is free of rust and damage.

Events along the way cause extra steps down: the factory warranty expiring, a redesigned model arriving, crossing a mileage milestone such as 100,000 miles, or an accident appearing on the history report.

We are not going to quote "cars lose X percent in year one" figures. They differ a great deal by model and by market conditions, and averages mislead. The method below gives you a number for the actual car you are considering.

Why it is often the biggest cost

A worked example with round numbers, for illustration only. You buy a new car for $36,000 and sell it five years later for $18,000.

That $300 a month is on top of your loan interest, insurance and fuel, and in this example it would likely exceed any one of them. It is invisible because it arrives all at once at trade-in time, as a smaller number than you hoped for. Total cost of ownership shows how it fits with the other costs.

What makes a car hold its value

No one can promise what a car will be worth in five years. These are the factors that have generally mattered.

Mostly decided when you choose the car

• Reputation for reliability and durability. Models that buyers trust at high mileage stay in demand used.
• Supply and demand. Models that are scarce relative to demand hold up. Models sold in large numbers to rental fleets, or with heavy discounts when new, tend to be plentiful and cheaper used.
• The price you actually paid. Depreciation runs from your purchase price, not MSRP. A car bought with a large discount has less far to fall; one bought with a markup has further. See dealer markups and market adjustments.
• Body style and powertrain in fashion. Tastes and fuel prices shift what used buyers want.
• Fast-moving technology. When each new model year brings clear improvements in range or features, older versions can lose value faster. This has affected some electric vehicles.
• Trim, color and options. Mainstream choices are easier to sell. Options rarely return their full cost. See how to choose a trim level.
• Redesign timing. Buying the last year before a full redesign can mean your car looks a generation old sooner.

Mostly decided by how you own it

• Mileage. Fewer miles than average for the age helps; more hurts.
• Condition. Clean interior, straight panels, no warning lights, good tires.
• Accident and title history. A reported accident reduces value even after a proper repair, and a branded title reduces it sharply.
• Service records. A folder of receipts makes a used car easier to sell and to price well.
• Number of owners and type of use. One private owner is the easiest story to tell.

Estimate it yourself from live prices

You do not need a forecast. The used market already shows what older examples of the same model are worth today. That is not a guarantee of the future, but it is real evidence and it is specific to the model.

Step by step

1. Pick the model and trim you are considering. Stay within the same generation where you can, since a redesign changes the comparison.
2. Search listings for each age from one to five years old on /cars or the market price pages. For each model year, note several asking prices for the same or a similar trim.
3. Match mileage to age. Use examples with roughly the miles you would put on in that time. If you drive 12,000 miles a year, compare three-year-old cars near 36,000 miles.
4. Take a middle value for each year, ignoring the highest and lowest listings. Skip cars with branded titles or unusually high or low mileage.
5. Find what each cost new. The original MSRP for that model year and trim is a starting point. If you know that the model sold at a discount or a premium back then, keep that in mind.
6. Work out the percentage retained: asking price today ÷ price when new.
7. Apply it to your price. Multiply your expected purchase price by the percentage for the age at which you plan to sell.

Worked example

Round numbers for illustration, not data for a real model. You plan to buy new at $32,000 and keep the car four years.

At four years, similar cars are listed at about 63 percent of what they cost new. Applied to your $32,000, that suggests a future asking price near $20,000, or about $12,000 of depreciation over four years.

Adjust for what the method misses

• Asking is not selling. Listed prices are what dealers hope to get. On The Motor Standard, each listing shows when we first saw it and every price change since, so you can see whether cars are selling near their original ask or being cut.
• Retail is not trade-in. A dealer will pay you less than it lists the car for, to cover reconditioning and profit. If you plan to trade in, take a meaningful amount off; if you sell privately, less. Sell or trade in compares the two.
• Markets move. Used prices rise and fall with new-car supply, interest rates and fuel prices. Treat your estimate as a range.
• Models change. A model that held value well in one generation may not in the next.

Run the same exercise for each car on your shortlist. The comparison between them is more reliable than any single number, because the same errors apply to both.

Ways to lose less to depreciation

• Buy one to three years old. The first owner has absorbed the steepest part. The table you just built shows exactly how much. New vs used vs CPO covers the trade-offs.
• Keep it longer. The cost per year falls the longer you hold the car, until repair costs start to offset it.
• Negotiate the purchase price. Every dollar off the price is a dollar less to lose.
• Choose mainstream specifications if resale matters to you.
• Keep mileage, condition and records in good order. Fix small things, keep receipts, and repair accident damage properly.
• Sell well. Get more than one offer. Trade-in value: how to get more explains how.

Depreciation and your loan

Depreciation is why people end up owing more than their car is worth. If the loan balance falls more slowly than the car's value, which is common with small down payments and long terms, you are "upside down" until the lines cross. That matters if the car is totaled or you need to sell early. A larger down payment and a shorter term keep you ahead of the curve, and negative equity explains what to do if you are already behind.

With a lease, the lender estimates depreciation for you: the residual value in the contract is its forecast of what the car will be worth at the end, and your payments mostly cover the difference. Lease vs buy explains when shifting that risk to the lender is worth paying for.