Tax strategy
Section 179 vs Bonus Depreciation vs MACRS [2026]
You bought equipment — a truck, a CNC machine, a server rack, $50,000 of office furniture. But the IRS won't let you deduct the full cost in one year unless you pick the right method. You have three options: Section 179 immediate expensing, Bonus Depreciation, and MACRS. Each has different limits, rules, and tax outcomes. Here's how to choose.
At a Glance: The Three Methods
| Feature | Section 179 | Bonus Depreciation | MACRS |
|---|---|---|---|
| 2026 Deduction Speed | Up to full eligible cost in the year placed in service, subject to limits | 100% for certain qualified property acquired and placed in service after January 19, 2025; separate rules apply to earlier acquisitions | Spread over 3-39 years depending on asset class |
| 2026 Annual Limit | $2,560,000 maximum; reduced dollar-for-dollar for qualifying property costs placed in service above $4,090,000 | No dollar cap — unlimited qualifying asset purchases | No dollar cap — applies to all depreciable business property |
| Eligible Property | Tangible personal property used >50% for business, plus qualified improvement property (QIP), roofs, HVAC, security systems | New AND used property with MACRS recovery ≤ 20 years, plus QIP, qualified film/TV/live theater | All tangible depreciable business property, real property (27.5/39-year), land improvements (15-year) |
| Profit Limitation | Yes — critical. Deduction limited to business taxable income. Cannot create or increase a net operating loss. | No Section 179-style income limit; can create or increase a loss, subject to other tax limitations. | No — depreciation applies regardless of profit. Can create or increase NOL. |
| Used Property Eligible? | Yes — if purchase and other eligibility requirements are met | Certain used property qualifies, subject to acquisition and prior-use restrictions | Yes — both new and used |
| Vehicle Limits | Certain heavy SUVs (>6,000 and ≤14,000 lbs GVWR): $32,000 Section 179 cap for tax years beginning in 2026, with exceptions. Passenger-auto limits also apply. | Passenger-auto deduction caps and listed-property business-use rules may limit the allowance. | Passenger-auto limits depend on the year placed in service and applicable IRS guidance. |
| State Conformity | Most states conform (some with lower limits). Check your state. | Many states DO NOT conform — including CA, NY, NJ, IL, PA, MA. You may face state add-back. | All states conform to MACRS. No state-level surprises. |
Section 179: Electing Immediate Expensing
Section 179 of the Internal Revenue Code lets you deduct the full purchase price of qualifying equipment and software in the year you buy it and place it in service — instead of spreading the deduction over multiple years. Think of it as the IRS giving you permission to treat equipment purchases like ordinary business expenses.
2026 Limits (Tax Years Beginning in 2026)
- Maximum Section 179 deduction: $2,560,000
- Phase-out threshold: Deduction is reduced dollar-for-dollar when the cost of qualifying Section 179 property placed in service exceeds $4,090,000
- SUV/CUV limit: Certain SUVs with GVWR over 6,000 and not over 14,000 lbs have a $32,000 Section 179 cap, with exceptions
The Profit Limitation — Section 179's Biggest Constraint
You cannot use Section 179 to create or increase a net operating loss. Your total Section 179 deduction for the year cannot exceed your total taxable business income (from all businesses combined, including wages). If your business had $35,000 of taxable income and you bought $80,000 of equipment, your Section 179 deduction is capped at $35,000 — the remaining $45,000 carries forward to future years.
Business Use Requirement
Property must be used more than 50%for business. If business use drops below 50% during the property's recovery period, you must recapture (pay back) the excess depreciation benefit from prior years. This is called “Section 179 recapture.”
Qualified Improvement Property (QIP)
Since the Tax Cuts and Jobs Act fix (CARES Act technical correction in 2020), Qualified Improvement Property — certain interior improvements to nonresidential real property placed in service after the building was first placed in service — can qualify for Section 179 and 15-year MACRS. Enlargements, elevators, escalators, and the internal structural framework are excluded from QIP. Certain roofs, HVAC, fire protection, alarm, and security improvements can qualify separately for Section 179; that does not automatically make them bonus-eligible QIP.
Bonus Depreciation: Acquisition and Service Dates Matter
Bonus depreciation (Section 168(k)) allows an additional first-year depreciation deduction on qualified property. Unlike Section 179, it has no dollar limit and no profit limitation — you can deduct bonus depreciation even when the business has a loss, although other tax limitations can restrict use of that loss. The 100% allowance applies to certain qualified property acquired and placed in service after January 19, 2025. Earlier acquisitions follow separate transition and phaseout rules:
| Year | Bonus Depreciation % | Status |
|---|---|---|
| Acquired and placed in service after January 19, 2025 | 100% | Certain qualified property; exceptions and election-out rules apply |
| First tax year ending after January 19, 2025 | Optional 40% (60% for certain long-production-period property and aircraft) | Transition election for eligible post-January 19 property; not a general 2026 rate |
| Acquired before January 20, 2025 | Separate phaseout rules | Check acquisition, binding-contract, and placed-in-service dates; certain aircraft and long-production-period property have special rules |
P.L. 119-21 restored the 100% allowance for eligible post-January 19, 2025 property. Confirm the asset category, acquisition rules, business use, and applicable elections before claiming a deduction.
Source for the updated federal limits, eligibility, and elections: IRS Publication 946 (What’s New for 2026; chapters 2 and 3). Checked October 9, 2026. State rules require separate verification.
MACRS: The Standard Fallback
Modified Accelerated Cost Recovery System (MACRS) is the default depreciation method for all tangible property. If you don't elect Section 179 or cannot claim bonus depreciation, MACRS applies automatically. It uses the declining-balance method (switching to straight-line when that produces a larger deduction) over IRS-specified recovery periods:
| Recovery Period | Method | Typical Property |
|---|---|---|
| 3-year | 200% DB | Tractors, racehorses, special tools for manufacturing |
| 5-year | 200% DB | Computers, office equipment, vehicles, light trucks, R&D equipment |
| 7-year | 200% DB | Office furniture, fixtures, agricultural machinery, railroad track |
| 10-year | 200% DB | Vessels, barges, smart grid property, fruit-bearing trees/vines |
| 15-year | 150% DB | Land improvements (parking lots, fences, sidewalks), QIP, qualified restaurant property |
| 20-year | 150% DB | Farm buildings, municipal sewers |
| 27.5-year | Straight-line (SL) | Residential rental property (apartments, single-family rentals) |
| 39-year | Straight-line (SL) | Nonresidential real property — office buildings, warehouses, retail space |
MACRS also provides mid-quarter and half-year conventions that affect the first and last year's depreciation. The convention you use depends on when during the year the property was placed in service and whether more than 40% of your additions were placed in service in the last quarter.
Real-World Strategy Examples (2026)
These illustrations assume 100% business use, eligible equipment acquired and placed in service in 2026, no vehicle-specific caps, and no other deduction restrictions. They show federal deductions, not guaranteed tax savings.
Example 1: Profitable Contractor — Two Routes to Full Expensing
A contractor with $200,000 of income for the Section 179 limit buys $70,000 of qualifying tools and computers. An elected Section 179 deduction or 100% bonus depreciation could each recover $70,000 in year one. At an assumed constant 24% marginal federal income-tax rate, the illustrative reduction is $16,800. The actual result depends on other deductions, entity rules, and state conformity; Section 179 is not automatically the winner.
Example 2: Startup With Losses — Bonus Has No Business-Income Limit
A restaurant buys $150,000 of qualifying equipment and furniture and has a $50,000 tax loss before depreciation. Assume it has no other income counted toward the Section 179 business-income limit: Section 179 cannot be used currently. A 100% bonus allowance could deduct $150,000, producing a $200,000 loss before other limitations. That does not guarantee a current refund or a $200,000 usable NOL; basis, at-risk, passive-loss, excess-business-loss, and NOL rules can affect when the deduction benefits the taxpayer.
Example 3: Purchase Above the Section 179 Phaseout Threshold
A company places $4,500,000 of qualifying equipment in service in a tax year beginning in 2026. Its Section 179 dollar limit is $2,560,000 − ($4,500,000 − $4,090,000) = $2,150,000, before the business-income limit. If that deduction is fully allowed and all remaining equipment basis qualifies for 100% bonus depreciation, bonus could recover the remaining $2,350,000. The combined deduction could reach $4,500,000, subject to other tax limitations. MACRS applies to any basis left after allowed Section 179 and bonus deductions.
State Conformity: The Hidden Trap
State treatment can differ from the federal rules. Check your state’s current instructions for the tax year and taxpayer or entity type before applying a federal deduction to your state return:
Bonus Depreciation State Treatment
Verify whether your state allows the federal deduction, requires an add-back, or permits recovery over later years. Acquisition dates, property categories, and entity rules can affect that treatment. This page’s IRS source verifies federal provisions, not state conformity.
Section 179 State Conformity
State Section 179 limits and conformity differ by state and taxpayer or entity type. Verify the applicable state’s current instructions for deduction limits, qualifying property, and carryforwards. Do not assume the federal $2,560,000 maximum is the state maximum.
If state treatment differs, retain the separate federal and state basis, deductions, and adjustments. Check the relevant state return instructions or obtain qualified advice before filing.
Explore Equipment Cost Scenarios
Use the depreciation calculator for book-expense methods and the buy-vs-lease calculator for a simplified five-year cost comparison. Neither calculates Section 179, bonus depreciation, or MACRS. Use IRS guidance and your applicable state instructions to determine tax deductions.
Frequently asked questions
Can I use Section 179 AND Bonus Depreciation on the same asset?+
Yes, if the asset qualifies for both. Apply elected Section 179 first, then bonus depreciation to the remaining eligible basis, then MACRS to any balance. For $200,000 of equipment acquired and placed in service after January 19, 2025, an allowed $100,000 Section 179 deduction plus 100% bonus on the remaining $100,000 can recover the full basis. Section 179 is subject to dollar, investment, and business-income limits. Bonus is generally automatic unless you elect out; exceptions and transition elections apply. This is not always the best choice for future taxes or state treatment.
What assets are NOT eligible for Section 179 or Bonus Depreciation?+
Land and inventory do not qualify for these equipment deductions. Section 179 generally requires eligible property acquired by purchase and more than 50% business use; related-party acquisitions are restricted. Bonus depreciation has separate qualified-property, used-property acquisition, and excluded-property rules, including restrictions for property required to use ADS. Do not assume every building component qualifies: certain nonresidential improvements may qualify for Section 179, while qualified improvement property may qualify for Section 168(k) bonus. A separate Section 168(n) election covers certain qualified production property. Review IRS Publication 946 for the applicable category.
Does the de minimis safe harbor election affect this decision?+
Yes — under the tangible property regulations (Treas. Reg. §1.263(a)-1(f)), you can elect to deduct up to $2,500 per invoice (or per item as substantiated by invoice) for tangible property that would otherwise need to be depreciated. This requires a written accounting policy in place at the beginning of the tax year. For micro-businesses, this can eliminate the need for depreciation on small purchases (under $2,500) entirely.
I bought equipment in December — can I still take Section 179?+
Yes, as long as the equipment is 'placed in service' by December 31. Placed in service means the asset is ready and available for its specific use — it doesn't mean you actually have to use it. For example, a piece of manufacturing equipment that is installed and tested by December 31 qualifies even if production doesn't start until January. However, Q4 acquisitions can trigger the mid-quarter convention for MACRS on remaining basis if >40% of your annual asset additions were placed in service in Q4.
How do I fix a mistake — if I should have used a different depreciation method?+
You can file Form 3115 (Application for Change in Accounting Method) to correct depreciation errors. This is an automatic change (not requiring IRS consent) for most depreciation corrections under Rev. Proc. 2024-23. The catch-up adjustment (Section 481(a) adjustment) is generally taken in the year of change. This is complex and typically requires a CPA. The alternative — filing an amended return for each affected year — may also be an option if within the statute of limitations (generally 3 years).