⚠ Educational only.
TaxPlain does not provide tax, legal, or financial advice. Always consult a qualified tax professional about your specific situation.
What depreciation means
Depreciation is the tax process businesses use to spread the cost of expensive assets over multiple years instead of deducting the entire purchase at once. The IRS assumes certain business assets lose value gradually as they're used, worn out, or become outdated.
Think of depreciation like slicing a large purchase into smaller yearly tax deductions. Instead of deducting a $20,000 work truck all in one year, the IRS may require you to deduct part of it each year over several years.
What can be depreciated
✓ Usually Depreciable
Business vehicles, machinery, computers, office furniture, rental property improvements, equipment, and other long-term business assets expected to last more than one year.
✕ Usually Not Depreciable
Inventory, personal-use property, land itself, short-term supplies, and assets used less than 50% for business generally cannot be depreciated.
📅 Important timing rule
You generally begin depreciation when the asset is "placed in service" — meaning ready and available for business use — not necessarily when you paid for it.
How depreciation works
Breaking down the basics
Most business assets fall under a system called MACRS (Modified Accelerated Cost Recovery System). The IRS assigns different categories of property different depreciation schedules.
Section 179 — Lets businesses deduct much or all of an asset immediately instead of spreading it out
Bonus depreciation — Allows additional first-year write-offs for qualifying assets
Depreciation recapture — Tax rules that may apply if you later sell the asset for a gain
Common depreciation methods
Businesses don't all depreciate assets the same way. The method affects how quickly deductions happen.
Straight-line depreciation — Equal deduction amounts every year
Accelerated depreciation — Larger deductions in earlier years, smaller later
Section 179 deduction — Immediate deduction for qualifying business purchases
Bonus depreciation — Extra first-year deduction on eligible assets
MACRS — The standard IRS depreciation system most businesses use
Common mistakes to avoid
⚠ Mixing Personal + Business Use
If an asset is partly personal and partly business, you can usually only depreciate the business-use percentage. Poor mileage or usage records are a common audit issue.
⚠ Forgetting Depreciation Recapture
Selling a depreciated asset may trigger taxes later. The IRS can "recapture" previous depreciation deductions when the property is sold.
⚠ Expensing Assets Incorrectly
Not every purchase can be deducted immediately. Some assets legally must be depreciated over multiple years instead of fully expensed upfront.
⚠ Missing Section 179 Opportunities
Many small businesses overpay taxes because they don't realize they can immediately deduct qualifying equipment purchases under Section 179.
What to do right now
If you bought equipment, vehicles, computers, machinery, or rental property for business use, depreciation likely affects your tax return. Small-business owners and landlords should track purchase dates, costs, business-use percentages, and receipts carefully. Even minor mistakes in depreciation schedules can create expensive IRS problems years later when assets are sold.
Questions to ask your tax professional
01Should this purchase be depreciated or deducted immediately?
02Do I qualify for Section 179 or bonus depreciation?
03What's the correct recovery period for this asset?
04How does business vs. personal use affect my deduction?
05Will selling this asset later trigger depreciation recapture taxes?
06Am I tracking enough records to support these deductions in an audit?
Frequently asked questions
Can I depreciate my personal car?
Only the business-use portion generally qualifies. If you use the vehicle 60% for business and 40% personally, only the business percentage is usually deductible.
What's the difference between Section 179 and depreciation?
Normal depreciation spreads deductions across multiple years. Section 179 allows qualifying businesses to deduct much or all of certain purchases immediately, subject to IRS limits and income restrictions.
Do rental properties get depreciated?
Yes. Residential rental buildings are generally depreciated over 27.5 years, while commercial buildings are generally depreciated over 39 years. Land itself is not depreciable.
What happens if I forget to claim depreciation?
The IRS may still treat the asset as though depreciation was claimed. Fixing missed depreciation often requires filing Form 3115 to change accounting methods.
Can small businesses deduct equipment immediately?
Often yes. Section 179 and bonus depreciation rules allow many businesses to write off qualifying purchases immediately instead of depreciating them slowly over time.