How Do You Calculate Equipment Depreciation for Taxes?

Table of Contents

• What Equipment Depreciation Means for Your Tax Return
• Gather the Information You Need Before Calculating
• Straight-Line Depreciation Formula, Step by Step
• Equipment Depreciation Methods and When Each Applies
• Equipment Depreciation Example With Real Numbers
• Building a Depreciation Schedule for Business Equipment
• Booking Your Depreciation Schedule With Your Tax Preparer
• Frequently Asked Questions

What Equipment Depreciation Means for Your Tax Return

Last Updated: October 29, 2026

Equipment depreciation is how you spread the cost of a business asset over the years it helps you earn income. Instead of deducting the full price of a $50,000 machine in the year you buy it, you deduct a portion each year. The IRS calls this recovery, and the rules for it are set out in the Modified Accelerated Cost Recovery System, or MACRS (Topic no. 704, Depreciation).

Small and mid-size business owners often raise depreciation as one of the first tax questions when making financing decisions. The goal is simple: match your deductions to how the equipment actually wears out.

Two terms matter most here. Basis is what you paid for the equipment, including sales tax, delivery, and installation. Useful life is the number of years the IRS assigns to that type of property, which determines how fast you can deduct it.

The good news is that the calculation is more mechanical than most people expect. Compare how leasing and buying are treated for taxes in Equipment Lease vs Loan: Tax Implications Explained. Once you know your basis, recovery period, and method, the numbers follow a clear path.

Gather the Information You Need Before Calculating

Before you touch a formula, pull together your purchase records. Missing paperwork is the most common reason depreciation calculations get redone.

• Purchase invoice or contract: Shows the price paid and the date placed in service
• Delivery and installation costs: These add to your basis
• Sales tax paid: Also part of basis for most equipment
• Date the equipment was ready for use: This starts the depreciation clock, not the payment date
• Business use percentage: Required if the equipment is also used personally
• Prior depreciation taken: Needed if you bought used equipment or changed methods

A common mistake is using the payment date instead of the placed-in-service date. If you paid in December but the machine was not installed until January, your first deduction year is the later one.

Straight-Line Depreciation Formula, Step by Step

Straight-line depreciation spreads the cost evenly across each year of useful life. It is the simplest method and a good place to start.

The formula:

Annual depreciation = (Cost − Salvage Value) ÷ Useful Life

Here is how to run it:

1. Take your total basis (purchase price plus eligible add-ons).
2. Subtract the expected salvage value, which is what the equipment will be worth at the end of its life. For tax purposes many business owners use zero.
3. Divide the result by the number of years in the recovery period.
4. Repeat that amount each year until the asset is fully depreciated.

For a $20,000 printing press with zero salvage value and a 7-year recovery period, the annual deduction is $20,000 ÷ 7, or about $2,857.

Watch out: the IRS generally does not allow straight-line depreciation for federal tax returns on MACRS property unless you elect it. Check the rules for your asset class before assuming it applies.

Here is the straight-line method in summary, using the figures the article gives:

Equipment Depreciation Methods and When Each Applies

Most businesses use MACRS for federal taxes, but MACRS is a framework, not a single method. The General Depreciation System (GDS) is the default, and the Alternative Depreciation System (ADS) uses straight-line over longer lives in certain cases. Confirm which system applies to your property with IRS Publication 946 or your tax preparer.

The four levers you actually choose between:

• Straight-line (SL): Equal deductions each year. Under MACRS you can elect straight-line for a class of property, but you generally cannot cherry-pick asset by asset. Straight-line is common for book purposes and for ADS-required property.
• 200% declining balance (MACRS GDS default): Applies a rate to the remaining basis each year, so deductions are largest early and taper. The half-year convention treats all property placed in service during the year as placed in service at mid-year, which is why the first-year percentage is roughly half of the full-year rate.
• Section 179 expensing: Lets you deduct the full cost of qualifying property in the year it is placed in service, up to an annual dollar limit, with a phase-out once total qualifying purchases exceed a threshold. The limits change over time, so confirm the current figures on IRS.gov or with your preparer before you rely on them. Section 179 is limited to taxable business income, so it cannot create a loss (Publication 946 (2025), How To Depreciate Property).
• Bonus depreciation: An additional first-year deduction on qualifying property, applied after Section 179. The applicable percentage has changed in recent years, so confirm the rate in effect for the year the asset is placed in service on IRS.gov or with your preparer. Bonus depreciation can create a loss, unlike Section 179, and it can apply to certain used property, subject to IRS rules.

Ordering matters. The standard sequence is Section 179 first (to the extent of taxable income), then bonus depreciation on the remaining basis, then MACRS on whatever is left. Running the numbers in a different order produces a different tax bill. That is the part a tax professional earns their fee on.

Depreciation results vary by method and convention, so run the figures for your specific asset with your preparer before choosing a method. Section 179 or bonus depreciation, if the asset qualifies, can wipe out most or all of the first-year basis, which is why the method choice usually matters more than the arithmetic.

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Equipment Depreciation Example With Real Numbers

Say your company buys a $60,000 CNC machine, placed in service in March. You pay $3,000 in sales tax and $2,000 for installation, so your basis is $65,000.

Under MACRS with the 200% declining balance method and the half-year convention, the first-year deduction depends on the recovery period and the rates published by the IRS. Later years are calculated on the remaining balance.

Straight-line depreciation spreads the same basis evenly over the recovery period, while declining balance front-loads the deduction.

If you financed the machine instead of paying cash, your depreciation basis is still the full $65,000. You can also estimate your equipment loan payments alongside these figures. Learn how financing interest rates are calculated to see how they affect total cost. Interest on the loan is a separate deduction. Lease structure changes this picture, so it is worth reviewing the lease-versus-loan question with a qualified advisor before depreciation is booked.

Building a Depreciation Schedule for Business Equipment

A depreciation schedule is a year-by-year table tracking each asset. Keeping one for each piece of equipment, even small items, can help support your figures if they are reviewed, and it is the source document many tax preparers use to complete Form 4562.

Include these columns:

• Asset description and serial number
• Date placed in service
• Cost basis (purchase price plus sales tax, delivery, and installation)
• Recovery period, method, and convention (half-year, mid-quarter, or mid-month)
• Section 179 or bonus depreciation elected, if any
• Annual deduction for each year
• Accumulated depreciation
• Remaining adjusted basis (book value)

Tie the schedule to your return. The annual deduction total on your schedule should reconcile to the depreciation line on your return and to Form 4562. If the two do not match, you have either a data-entry error or an asset that was disposed of but never removed from the schedule, both common audit findings.

Tie it to your balance sheet. Accumulated depreciation is a contra-asset account that reduces the gross equipment balance. Lenders reading your balance sheet want to see that the net book value is consistent with the schedule.

Update it every year and on every disposal. When you sell or retire equipment, the gain or loss depends on your remaining adjusted basis. Remove the asset from the active schedule, record the disposition, and keep the history.

Spreadsheet templates work fine for a handful of assets. Once you have many items, multiple methods, or mid-year acquisitions that trigger the mid-quarter convention, accounting software with a fixed asset module makes more sense, and it produces the lender-ready reports that a spreadsheet cannot.

Booking Your Depreciation Schedule With Your Tax Preparer

Bring your completed schedule to your tax preparer before the return is filed. Ask them to confirm three things: the recovery periods they assigned, which elections you made (Section 179, bonus, or straight-line), and whether any state rules differ from federal treatment.

State depreciation rules do not always match federal ones. Some states decouple from federal bonus depreciation, which may require separate state figures; confirm the rules for your state with its tax agency.

Plan ahead for cash flow too. A large Section 179 deduction lowers this year’s tax bill but does nothing for next year’s, so ask a preparer to model the options before you choose.

Keep receipts and the schedule for as long as the asset is on your books, plus the normal retention period for tax records. If you are not sure how long that is, ask your preparer before you discard anything.

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