Most coverage of the One Big Beautiful Bill Act has focused on the income tax rate drama and the debt ceiling politics. The tax provision that will actually move the needle for small business owners got buried in paragraph nine of most articles. That provision: 100% bonus depreciation is back, permanently, and mid-2026 is precisely when you should be acting on it.

What Changed and Why It Matters Now

Before July 4, 2025, bonus depreciation was dying a slow legislative death. Under the old rules, the deduction had already phased down to 60% in 2024 and was scheduled to hit 40% in 2025, then 20% in 2026, then zero. If you’d bought a $200,000 piece of equipment under the old 2025 rate, you’d have written off $80,000 in year one. Under the restored 100% rate, you write off the full $200,000.

The OBBBA reversed all of that. Signed on July 4, 2025, the law permanently restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. The IRS confirmed in Notice 2026-11 that the existing regulatory framework applies with updated effective dates, so the mechanics aren’t new, just the rate.

The reason mid-2026 is a critical window: equipment you buy and put into service before December 31, 2026 generates a full first-year deduction on your 2026 tax return. You’re not spreading this over five or seven years. You take it all at once, in the year you start using the asset.

Bonus Depreciation vs. Section 179: Know Which Tool to Use

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Deduction TypeRate/LimitPhase-Out ThresholdKey Advantage
Bonus Depreciation (Section 168(k))100% of asset costN/ACan create net operating loss; applies automatically to qualifying property
Section 179 Expensing (2026)Up to $2,560,000$4,090,000 equipment spendCapped by taxable income; elective; recognized by most states
Section 179 Phase-OutN/ADisappears around $6,650,000Dollar-for-dollar reduction above threshold

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These two deductions are often described as interchangeable. They’re not.

Bonus depreciation under Section 168(k) applies automatically to new and used qualifying property. It can create or deepen a net operating loss, which you can carry forward to offset future profitable years. That makes it genuinely useful for businesses in a growth or investment phase who expect to be more profitable in 2027 or 2028.

Section 179, meanwhile, is capped by your taxable income. You can’t use it to manufacture a loss. But the OBBBA doubled the expensing limit from $1.25 million to $2.5 million, and for 2026 specifically, the inflation-adjusted limit lands at $2,560,000, with the phase-out threshold at $4,090,000. That phase-out matters: businesses spending more than $4,090,000 on equipment in a single year start losing the deduction dollar-for-dollar, and it disappears entirely around $6.65 million in annual equipment spend.

For most small businesses, Section 179 is the cleaner, more controllable tool. You elect it, you choose which assets to apply it to, and you don’t have to take it on everything. Bonus depreciation, by contrast, applies to an entire asset class unless you affirmatively opt out. Mixing both strategically, Section 179 first to maximize current-year deductions within your taxable income, then bonus depreciation to clean up the rest, is how a CPA earns their fee.

One more reason to understand the distinction: as Grant Thornton’s analysis of the OBBBA noted, the two provisions interact, and using them in the wrong order can cost you deductions you didn’t realize you were leaving behind.

The State Tax Problem Nobody Warns You About

Here’s what most of the celebratory coverage skips entirely. Several states don’t conform to federal bonus depreciation rules under Section 168(k). Illinois and New York are two prominent examples. If your business operates in those states, you may be taking a large federal deduction that your state simply doesn’t recognize, which means you’ll owe more state tax than your federal return suggests. You can end up in a situation where your federal liability drops sharply while your state bill barely moves.

This is where Section 179 has a concrete advantage for multi-state operators. Most states do conform to Section 179 expensing, at least partially, so the deduction actually flows through to your state return. If you have nexus in non-conforming states, leaning on Section 179 over bonus depreciation may produce a better blended tax result. Worth running the numbers both ways before year-end, not after.

What Qualifies and What the Acquisition Date Rule Actually Means

Not every asset qualifies, and the acquisition date rule has real teeth.

Qualifying property includes tangible personal property with a recovery period of 20 years or less: machinery, equipment, computers, vehicles under a certain weight threshold, off-the-shelf software, and certain qualified improvement property. Real property generally doesn’t qualify for bonus depreciation, though there are specific exceptions for things like qualified improvement property inside a commercial building.

The acquisition date requirement is where businesses get tripped up. The asset must be both acquired AND placed in service after January 19, 2025 to get the full 100% rate. If you signed a binding purchase contract before that date, you’re stuck with the old 40% rate even if the equipment arrived last month. The IRS was explicit about this in its guidance per the OBBBA provisions page, and practitioners have flagged it repeatedly. If you’re buying used equipment, check whether the original purchase agreement predates that threshold.

For equipment you’re considering right now, in mid-2026, this isn’t an issue. You’re well past the cutover. Buy it, place it in service before December 31, deduct 100%.

How to Think About Timing the Purchase

A few practical observations from someone who has watched clients blow this.

First, “placed in service” means the asset is ready and available for use in your business. It doesn’t mean actively being used every day. A piece of equipment delivered to your facility in November 2026 and available for operation qualifies, even if you don’t run it until January. Document the delivery and readiness date.

Second, don’t buy equipment just to get a deduction. The deduction is worth your marginal tax rate, not the full purchase price. If you’re in a 30% blended federal/state bracket and you spend $100,000 on equipment you didn’t need, you saved $30,000 and spent $70,000 net. The math works in your favor only when the equipment generates value, saves labor, or replaces something you’d have bought anyway.

Third, the Section 179 deduction is now indexed to inflation annually starting in 2026, per U.S. Bank’s analysis of the OBBBA changes. That means the limit will adjust in future years, so there’s no artificial urgency to front-load purchases purely for 2026. Make the timing work for your operational needs first.

The permanent restoration of 100% bonus depreciation removes the guessing game that made equipment planning miserable for the last three years. You can now build a capital expenditure strategy without watching Congress play chicken with phase-down schedules. That’s genuinely useful, and for business owners with real equipment needs in the second half of 2026, the timing couldn’t be cleaner. Talk to your CPA before year-end, not in January when the window has already closed.

Sources

This article is for general informational purposes only and does not constitute financial, tax, or legal advice. Business finance and tax rules vary by entity type, state, and individual circumstances. Consult a qualified CPA, enrolled agent, or business attorney for advice specific to your situation.

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