Quick start
- Open the Depreciation Calculator.
- Enter original cost and estimated salvage value as dollar amounts.
- Use the first example, "Straight-line asset: $12,000 cost, $2,000 salvage, 5-year life, age 2", if you want to see a filled-out estimate before entering your own values.
- Calculate, read the formula line, then copy the result only after the amounts, percentages, time periods, or assumptions look right.
Best uses
Start here if one of these sounds like your job. The examples below show which inputs matter most.
- Estimate book value after straight-line depreciation.
- Compare straight-line and declining-balance depreciation.
- Check accumulated depreciation for a simple asset example.
- Separate learning math from IRS tax depreciation rules.
What this calculator is for
The Depreciation Calculator estimates book value using straight-line or declining-balance math. It is useful for learning the idea or checking a simple book-value schedule, not for filing taxes or setting accounting policy.
Good fit examples: Estimate book value after straight-line depreciation. Compare straight-line and declining-balance depreciation.
What to enter
Finance estimates are sensitive to small input changes. Check whether a field expects a monthly amount, annual amount, dollar value, or percent before calculating.
- Enter original cost and estimated salvage value as dollar amounts.
- Enter useful life and asset age in years.
- Choose straight-line for even depreciation or declining balance for faster early depreciation.
- For declining balance, enter the yearly rate as a percent, such as 25 for 25%.
Example walkthrough
Try the calculator example: Straight-line asset: $12,000 cost, $2,000 salvage, 5-year life, age 2. The example result is $8,000 book value and $4,000 accumulated depreciation.
- $12,000 cost minus $2,000 salvage gives $10,000 of depreciable amount.
- With a 5-year straight-line life, annual depreciation is $2,000. After 2 years, accumulated depreciation is $4,000 and book value is $8,000.
- $25,000 cost, $5,000 salvage, 25% declining balance, and age 3 gives about $10,546.88 book value in this simple model.
Formula and steps
In plain language: Depreciable amount = cost - salvage value. Straight-line depreciation divides depreciable amount by useful life. Declining balance applies the selected rate to remaining book value each year while stopping at salvage value. For the $12,000 straight-line example, depreciable amount is $10,000. Over 5 years, annual depreciation is $2,000. After 2 years, accumulated depreciation is $4,000 and book value is $8,000.
If the estimate looks surprising, check the formula and inputs before using the answer in a budget, comparison, or planning note.
How to read the answer
Start with the headline result. Then read the supporting lines to see what made the number larger or smaller, such as rates, time periods, costs, taxes, fees, discounts, or contributions.
- Book value is cost minus accumulated depreciation.
- Accumulated depreciation is the total depreciation counted so far.
- Annual depreciation estimate shows the current simple yearly amount for the selected method.
- Declining-balance results usually count more depreciation earlier, then slow down as book value falls.
Common mistakes to avoid
Most bad finance estimates come from mixing rates, terms, monthly amounts, and annual amounts. The other common mistake is using a planning estimate as if it were a final quote.
- Do not use this as tax depreciation advice.
- Do not ignore MACRS class life, placed-in-service dates, partial-year conventions, section 179, bonus depreciation, listed property rules, recapture, or accounting policy.
- Do not set salvage value equal to or above cost.
- Do not treat asset age as the same thing as an IRS placed-in-service date.
What to try next
A related money tool can help check the same question from another angle before you rely on one result.
- Use Business Loan Calculator if the asset was financed.
- Use Average Return Calculator to compare investment-style performance.
Sources and estimate notes
This guide links to public financial, consumer, statistical, or tax references where they are useful for understanding the calculator context.
Source links improve transparency, but they do not turn a quick calculator into professional advice or a final loan, tax, payroll, or investment answer.
Worked examples for Depreciation Calculator
$8,000 book value and $4,000 accumulated depreciation
About $10,546.88 book value
$5,000 book value after one year
FAQ in plain language
When should I use the Depreciation Calculator?
Use it when you want to test the exact inputs on this page: Estimate book value after straight-line depreciation. Compare straight-line and declining-balance depreciation. The result is a check against your assumptions, not proof that a lender, tax app, broker, platform, or provider will use the same number.
What do the main Depreciation Calculator inputs mean?
Original cost means the starting cost or recorded cost basis for this simple book-value estimate. Salvage value means the estimated value left at the end of useful life. The calculator does not depreciate below this amount. Useful life means how many years the asset is expected to be used in this simple model. Asset age means how many years of depreciation to count so far. Method means straight-line spreads depreciation evenly; declining balance counts more depreciation earlier.
Is this IRS tax depreciation?
No. This calculator teaches straight-line and declining-balance book-value math. IRS depreciation can depend on MACRS tables, class life, placed-in-service date, conventions, section 179, bonus depreciation, and recapture rules.
What is accumulated depreciation?
Accumulated depreciation is the total depreciation counted so far. Book value is original cost minus accumulated depreciation.
Why does salvage value matter?
Salvage value is the amount the asset is expected to be worth at the end. This calculator stops depreciation at salvage value so the book value does not go below the floor you entered.
What is the Depreciation Calculator doing with my numbers?
In plain language: Depreciable amount = cost - salvage value. Straight-line depreciation divides depreciable amount by useful life. Declining balance applies the selected rate to remaining book value each year while stopping at salvage value. For the $12,000 straight-line example, depreciable amount is $10,000. Over 5 years, annual depreciation is $2,000. After 2 years, accumulated depreciation is $4,000 and book value is $8,000.
How should I read the Depreciation Calculator answer?
Read book value first, then check accumulated depreciation and annual depreciation. If you choose declining balance, early years usually have larger depreciation than later years.
Related tools
- Average Return Calculator Estimate net gain, cumulative return, average annual return, and CAGR.
- Business Loan Calculator Estimate a business loan payment, total interest, origination fee, cash received, and total cost.
- Finance Calculator Project a future balance from starting money, monthly deposits, rate, and time.
Keep exploring
If this guide is close but not exact, these links keep you near the same kind of problem.
- Finance Browse the full category for related tools that help with the same job.
- All free tools Search the complete Access Free Tools library by task, category, or tool name.
- All calculator and utility guides Find more plain-language examples, formulas, mistakes, and result explanations.
- Free calculator resources Start here when you are not sure which calculator page fits.
Privacy and copying results
Recent answers stay visible only while you work in the current browser tab. They are not sent to a server.
Use Copy answer when you want to save the inputs and result in notes, homework, a message, or a project list. Check the units, labels, and limits before copying.