Use this free depreciation calculator to estimate how any asset loses value over time. Enter the original purchase price, salvage value, and useful life. The tool returns annual depreciation, accumulated depreciation, and book value for each year.
The calculator supports straight-line, declining balance, and double declining balance methods. It also handles partial-year depreciation when an asset is placed in service mid-period. Whether you need a car depreciation calculator for a vehicle purchase or an accounting estimate for business equipment, the results appear instantly.
These figures are estimates for planning and bookkeeping. They are not tax advice or professional appraisals.
How the Depreciation Calculator Works
Start with three inputs:
- Cost of the asset. The original purchase price, including delivery or setup fees.
- Salvage value. The estimated value at the end of its useful life. This is what you expect to receive at disposal.
- Useful life. The number of years you plan to use the asset before replacing it.
Choose a depreciation method and, if needed, indicate the month the asset was placed in service. The calculator builds a year-by-year schedule showing annual depreciation, accumulated depreciation, and remaining book value.
You can adjust any input and recalculate immediately. Comparing methods side by side helps you see how each one distributes the cost of the asset over time.
Depreciation Methods Explained
Depreciation spreads the cost of an asset across its useful life. Different methods distribute that cost in different patterns. The right choice depends on how the asset actually loses value each year.
Straight-Line Depreciation Formula
Straight-line depreciation is the easiest way to calculate depreciation. It assigns the same expense to every year.
Formula:
Annual Depreciation = (Cost − Salvage Value) ÷ Useful Life
If you buy equipment for $10,000 with a $2,000 salvage value and a 5-year useful life, you depreciate $1,600 per year. The depreciation rate is 20% of the depreciable cost each year.
This method works well when an asset provides roughly equal benefit throughout its life. Office furniture and buildings are common examples.
What is depreciable cost? It is the original purchase price minus the salvage value. Only this portion gets expensed over the useful life of the asset.
Declining Balance and Double Declining Balance Calculation
Declining balance depreciation front-loads the expense. You apply a fixed depreciation rate to the remaining book value each year, not to the original cost.
Double declining balance doubles the straight-line rate. For a 5-year asset, the straight-line rate is 20%, so the double declining rate is 40%.
- Year 1: $10,000 × 40% = $4,000
- Year 2: $6,000 × 40% = $2,400
- Year 3: $3,600 × 40% = $1,440
The annual depreciation decreases each period because the book value shrinks. Most schedules switch to straight-line in a later year to ensure the asset reaches its salvage value by the end of its useful life.
This method suits assets that lose value quickly in their first year and early years, like computers and vehicles.
Partial-Year Depreciation Calculation
Assets rarely start service on January 1. When you place an asset in service mid-period, the first and last years receive a prorated share of the annual depreciation.
For example, if a straight-line asset with $1,600 annual depreciation starts in July, the first fiscal year records only $800 (6 out of 12 months). The remaining $800 shifts to an extra final period.
The calculator handles this automatically. Enter the month the asset was placed in service, and partial-year depreciation is calculated for you.
How to Calculate Asset Depreciation for Accounting and Bookkeeping
Depreciation is an accounting method that matches an asset's cost to the revenue it helps produce. Each period, a depreciation expense appears on the income statement, reducing reported profit without affecting cash flows.
What is asset depreciation? It is the systematic decrease in value of a tangible asset. Land does not depreciate. Equipment, vehicles, and buildings do.
For bookkeeping purposes, you record a depreciation journal entry each period. The expense hits the income statement. The offsetting credit increases accumulated depreciation on the balance sheet.
Salvage Value and Book Value
What is book value? Book value is the original cost minus accumulated depreciation. It represents the asset's remaining value on your books, not necessarily its market value or resale value.
Why can't salvage value be greater than cost? If the salvage value equals or exceeds the purchase price, there is no depreciable cost. The asset would not lose value, so there is nothing to expense.
Salvage value is an estimate. You set it when the asset is placed in service and can revise it if conditions change. A reasonable estimate keeps your depreciation schedule meaningful.
Accumulated Depreciation
Accumulated depreciation is the running total of all depreciation expensed since the asset was purchased. It is a contra-asset account on the balance sheet.
- After Year 1 of a $1,600 annual expense: accumulated depreciation = $1,600
- After Year 3: accumulated depreciation = $4,800
When accumulated depreciation equals the depreciable cost, the asset is fully depreciated. Its book value then equals the salvage value. You stop recording depreciation at that point, even if you still use the asset.
Car Depreciation Calculator: Calculate Car Depreciation by Make
Cars depreciate differently than business equipment. A vehicle's loss in value depends on make and model, mileage, condition, and market demand. This car depreciation calculator gives you a year-by-year estimate of your car's value based on average depreciation rates.
How much will my car depreciate? On average, a new car loses about 20% to 25% of its value in the first year. After 5 years, many vehicles retain only 40% to 50% of their original purchase price. Some makes hold their value much better than others.
Why Cars Depreciate: Wear and Tear, Ownership, and Market Value
Several factors drive a car's depreciation:
- Wear and tear. Every mile adds mechanical aging. High-mileage vehicles depreciate faster.
- Ownership history. A car loses value the moment it becomes "used." Subsequent owners add further decrease in value.
- Market value shifts. Supply, demand, fuel prices, and new model releases all affect resale value.
- Condition and maintenance. Well-maintained cars with clean records hold their value better.
A vehicle's actual cash value (ACV) at any point reflects these factors combined. Insurance companies and resources like Kelley Blue Book use them to estimate the value of the vehicle.
How Vehicles and Trucks Depreciate Compared to Other Assets
Business equipment typically follows a predictable depreciation schedule tied to a set useful life. Cars and trucks are less predictable because resale markets fluctuate.
Trucks, especially full-size pickups, tend to hold their value longer than sedans. Strong demand and limited supply keep resale prices higher. Luxury cars often depreciate the fastest in percentage terms because of high original prices and expensive maintenance.
For accounting, the IRS provides specific rules for vehicle depreciation, including annual dollar limits and mileage-based alternatives. This calculator provides planning estimates. Consult a tax professional for actual deduction amounts.
Depreciation by Make for Sedans, Trucks, and Luxury Cars
Not all makes depreciate at the same rate. General patterns based on industry data:
- Lowest depreciation (hold their value): Toyota, Lexus, Porsche, and Honda models typically retain the highest percentage of value after 5 years.
- Average depreciation: Ford trucks, Chevrolet, and Subaru fall in the middle range.
- Highest depreciation: Luxury sedans from brands like BMW, Mercedes-Benz, and Maserati often lose 50% or more of their value within 2 to 3 years.
Which cars depreciate the least? Toyota trucks and SUVs consistently rank at the top for value retention. Jeep Wranglers and Toyota Tacomas are frequently cited as the vehicles that depreciate the slowest.
These are averages across model years. Your specific car's depreciation depends on trim level, mileage, condition, and local market demand.
Can you slow down how fast a car depreciates? You can reduce the rate somewhat. Keep mileage reasonable, maintain service records, avoid modifications that narrow buyer appeal, and choose colors and trims with broad demand. Buying a lightly used car sidesteps the steepest first-year drop entirely.
Straight Line Depreciation Formula and Annual Depreciation Rate
The straight-line method is the most common approach for both accounting and quick estimates. Here is the formula again for reference:
Annual Depreciation = (Cost − Salvage Value) ÷ Useful Life
The annual depreciation rate as a percentage:
Depreciation Rate = (1 ÷ Useful Life) × 100
A 10-year asset has a 10% annual rate. A 5-year asset has a 20% annual rate.
How do I calculate my depreciation? Enter the cost of the asset, subtract the salvage value, and divide by the useful life in years. That gives you the yearly depreciation expense. Multiply by the number of years elapsed to find accumulated depreciation at any point.
This method works for any depreciable asset, from a $500 laptop to a $500,000 building. The calculator does the math instantly, but knowing the formula helps you verify results and make quick mental estimates.
Partial Year and When Assets Depreciate Mid-Period
Most assets are not purchased on the first day of your fiscal year. Partial-year depreciation accounts for the actual months (or days) of use in the first and last periods.
Common conventions:
- Mid-month convention. The asset is treated as placed in service at the midpoint of the month.
- Half-year convention. The asset receives half a year of depreciation in the first year, regardless of the actual start date.
- Mid-quarter convention. Used when more than 40% of assets are placed in service in the last quarter.
The IRS has specific rules about which convention applies. For planning purposes, this calculator uses a monthly proration by default. Enter the month, and the schedule adjusts automatically.
Partial-year calculations matter most in the first and last years of the schedule. Middle years receive the full annual depreciation amount.
Car Depreciation and Tax Deductions
If you use a vehicle for business, depreciation can provide a tax deduction. The IRS allows you to deduct the business-use portion of a vehicle's depreciation as a business expense.
Two main approaches:
- Actual expense method. Track real costs including depreciation, fuel, insurance, and repairs. Depreciation follows IRS tables with annual caps (for example, limits on first-year expensing for passenger vehicles).
- Standard mileage rate. Deduct a per-mile rate set annually by the IRS (67 cents per mile for 2024). This rate already accounts for depreciation, so you cannot claim a separate depreciation deduction.
What are the IRS rules for depreciation? The IRS sets recovery periods, allowable methods (typically MACRS for tax purposes), and annual dollar limits for certain assets like passenger vehicles. Section 179 expensing and bonus depreciation may allow larger first-year deductions for qualifying assets.
These rules change frequently. The calculator provides general depreciation estimates, not IRS-specific tax schedules. Work with a tax professional to determine your actual deduction.
How Accurately Can You Estimate and Calculate Depreciation
A depreciation calculator gives you a structured estimate. It is useful for:
- Planning budgets and understanding how assets lose value over time
- Comparing the cost of different purchases
- Preparing draft schedules for bookkeeping
- Estimating a vehicle's resale value at a future date
The estimate is only as good as the inputs. Salvage value is a guess. Useful life is an assumption. Real-world depreciation is affected by market conditions, asset condition, and factors no formula can predict precisely.
For accounting, the chosen method and useful life should reflect how the asset actually generates value. For car depreciation, market tools like Kelley Blue Book provide make-and-model-specific data that improves accuracy.
Use this calculator as a planning aid and a starting point. For tax filings, insurance claims, or business valuations, confirm results with a qualified professional.