Bonus Depreciation in 2026: How Businesses Can Deduct 100% of Qualifying Asset Costs Immediately

Bonus depreciation (also known as the additional first-year depreciation deduction under IRC Section 168(k)) is one of the most powerful tax incentives available to U.S. businesses. It allows taxpayers to immediately deduct a significant portion — or even the full cost — of qualifying business assets in the year they are placed in service, rather than spreading the deduction over many years through traditional depreciation schedules.

Thanks to major tax legislation in 2025, bonus depreciation is now permanently restored at 100% for most qualifying property. This change provides long-term certainty for business owners planning capital investments.

What Changed in 2026? The Return of Permanent 100% Bonus Depreciation

Prior to the One Big Beautiful Bill Act (OBBBA, P.L. 119-21), bonus depreciation was scheduled to phase down to 20% in 2026 and fully expire in 2027. The OBBBA reversed that completely.

• For qualified property acquired and placed in service after January 19, 2025: You can now deduct 100% of the cost in the first year.
• The 100% rate is permanent — there is no scheduled phase-out.
• IRS Notice 2026-11 (issued January 2026) provides clear interim guidance confirming how the rules apply, including transition elections and eligibility for certain sound recording productions.

This permanent full expensing applies to both new and used qualifying assets, making it far more flexible than the original pre-2018 rules.

Which Assets Qualify for 100% Bonus Depreciation?

To qualify, the property generally must:

• Be tangible, depreciable property with a recovery period of 20 years or less under the Modified Accelerated Cost Recovery System (MACRS).
• Include most machinery, equipment, vehicles, computers, furniture, and certain qualified improvement property (e.g., interior improvements to nonresidential buildings).
• Be acquired and placed in service after January 19, 2025 (both conditions must be met for the full 100% rate).
• Meet the “original use” or used-property rules (used assets qualify if they are new to the taxpayer and meet other Section 168(k) requirements).

Note: Certain real estate-related assets, such as those identified through a cost segregation study, can dramatically increase the amount eligible for immediate 100% bonus depreciation. Because the building structure itself (depreciated over 27.5 or 39 years) does not qualify, investors rely on engineering-based studies to identify short-life components — fixtures, land improvements, specialized electrical, and similar 5, 7, or 15-year assets — that then become eligible for the full first-year deduction. For a deeper look at how this works in practice, see this cost segregation overview with break-even thresholds and worked examples.

Real-World Benefits for Business Owners and Real Estate Investors

Bonus depreciation can significantly improve cash flow by reducing current-year taxable income. For example:

• A business purchases $500,000 of qualifying equipment in 2026 → It can deduct the full $500,000 in Year 1 (subject to any Section 179 limitations first).
• Real estate investors who own rental properties, apartment complexes, or mobile home communities often use cost segregation studies to reclassify building components (e.g., lighting, flooring, landscaping) into shorter 5-, 7-, or 15-year lives — making them eligible for full bonus depreciation.

This strategy is especially powerful when combined with the permanent 100% bonus rule now in effect. Investors who want to model their potential year-one deduction before commissioning a full study can use a free bonus depreciation calculator to estimate first-year savings across different property types and tax brackets. Actual results will depend on the engineering analysis and individual tax circumstances.

How Bonus Depreciation Works with Section 179

Many businesses use Section 179 first (which allows immediate expensing up to certain dollar limits — $2,560,000 for 2026, with a phase-out starting at $4,090,000 of qualified property placed in service). Any remaining basis can then qualify for 100% bonus depreciation.

This “stacking” approach often allows businesses to write off the entire cost of eligible assets in the year of purchase.

How to Claim Bonus Depreciation

1. Archivo Form 4562 with your timely filed tax return (including extensions).
2. Report the deduction on the appropriate depreciation line.
3. You may elect out of bonus depreciation (or elect the lower 40%/60% transitional rate for certain property placed in service in the first tax year ending after Jan. 19, 2025) if it makes sense for your tax situation.

Always consult a qualified tax advisor or CPA, as elections are generally irrevocable without IRS consent.

Why Bonus Depreciation Matters More Than Ever in 2026

With 100% bonus depreciation now a permanent fixture in the tax code, businesses have greater predictability when planning equipment purchases, facility upgrades, or real estate improvements. Whether you operate a small business, manage rental properties, or invest in commercial real estate, this provision can accelerate tax savings and free up capital for growth.

For more detailed examples, real estate-specific strategies (including cost segregation), and how bonus depreciation applies to rental properties and mobile home communities, see this comprehensive guide: Bonus Depreciation for Real Estate Investors. Important: Tax laws are complex and subject to interpretation. The information above is for educational purposes only and is not tax advice. Please consult a licensed tax professional or your CPA for advice tailored to your specific situation.

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