Bonus depreciation rewards year-end equipment buys 2026

Why year-end equipment buys pay off in 2026

The One Big Beautiful Bill Act turned the fourth quarter of every year into a strategic window for capital spending. Section 70301 permanently restored 100% bonus depreciation under Section 168(k), which means a business can deduct the entire cost of qualifying equipment in the year it goes into service rather than spreading the write-off over five, seven, or more years. For 2026, a year-end equipment purchase is one of the cleanest ways to cut your tax bill.

The reward is immediate and large. Buy a $200,000 machine, place it in service before the year closes, and the full $200,000 reduces your taxable income for 2026. There is no phase-down to race against anymore, because the deduction is now a permanent feature of the code rather than a benefit scheduled to shrink.

What still matters, and matters intensely at year-end, is timing. The deduction does not attach to the purchase order or the invoice date. It attaches to the moment the asset is ready and available for use. A machine bought in December but not operational until January lands in the wrong tax year. Understanding that distinction is the difference between a 2026 deduction and one you wait a full year to claim.

This guide walks through how the permanent Depreciation and amortization rules work, how to pass both eligibility tests by December 31, and how to calculate the value of a well-timed equipment purchase under the new legislation.

How permanent 100% bonus depreciation works now

Before the One Big Beautiful Bill Act, bonus depreciation was on a glide path toward zero. The prior law dropped the rate to 40% for 2025 and would have eliminated it by 2027. Section 70301 reversed that schedule and permanently locked the rate at 100%.

The core rule is straightforward. Qualified property that is acquired and placed in service after January 19, 2025, is eligible for a 100% first-year deduction. The change applies going forward and has no expiration date, so a purchase made in 2026, 2027, or later receives the same full treatment as one made today.

Qualified property under the depreciation rules generally includes tangible assets with a recovery period of 20 years or less, which covers most of what a growing business buys:

• Machinery, production equipment, and tools
• Computers, servers, and off-the-shelf software
• Office furniture, fixtures, and equipment
• Business vehicles within applicable limits
• Qualified improvement property for interior building upgrades

Because the benefit no longer phases down, the planning question shifts from "how much rate will I lose next year" to "which tax year do I want the deduction in." That makes the year-end placed-in-service decision the central lever, as detailed in Publication 946.

The acquired and placed-in-service tests are explained

Two separate tests must both be satisfied, and at year-end, the second one is where most deductions are won or lost. Treating them as one combined event is the most common planning mistake.

The acquisition test looks at when you committed to the purchase. Property must be acquired after January 19, 2025, which generally means you bought it outright or signed a binding purchase agreement after that date. Assets committed under an agreement signed before January 20, 2025, may still fall under the old phase-down rules, even if delivered later.

The placed-in-service test looks at when the asset became ready and available for its intended use. This is not the purchase date nor the delivery date. A conveyor system delivered on December 20, but still being installed and tested on December 31, is generally not placed in service that year.

To secure a 2026 deduction, sequence the year-end purchase so both tests clear by December 31:

• Confirm the asset is acquired through purchase or a signed agreement in 2026
• Take delivery with enough lead time for installation
• Complete setup, calibration, and testing before year-end
• Document the date the asset became operational and available
• Retain proof of first business use in the 2026 tax year

Guidance on what counts as placed in service for small business assets appears in Publication 334, which is the current small business reference.

Calculating your 2026 year-end equipment savings

The value of a year-end purchase depends on the asset cost and your tax rate. Because 100% of the cost is deductible immediately, the math is simple, and the cash impact is front-loaded into the year of purchase.

Example calculation for a pass-through business:

• Qualifying equipment placed in service by December 31, 2026: $200,000
• Owner's marginal tax rate: 37%
• First-year deduction: $200,000
• Federal tax saved in 2026: $200,000 times 37% equals $74,000

Example calculation for a C Corporation:

• Qualifying equipment placed in service by December 31, 2026: $500,000
• Corporate tax rate: 21%
• First-year deduction: $500,000
• Federal tax saved in 2026: $500,000 times 21% equals $105,000

The timing point sharpens the contrast. If that same $200,000 machine is ordered in December but not operational until January, the deduction shifts to 2027, and the $74,000 of tax savings is deferred a full year. For a business managing cash flow, pulling that benefit into the current year can fund the next investment. Reinvested savings can also support broader planning across your Individuals return when business income flows through to the owner.

New and used equipment that qualifies for a bonus

One of the most useful features of the permanent rules is that used equipment qualifies, not just new purchases. This opens year-end planning to businesses buying quality pre-owned machinery, vehicles, and technology.

Used property is eligible for 100% bonus depreciation when it is new to your business. The asset cannot have been used by you or a predecessor before acquisition, it must be acquired by purchase rather than from a related party, and its cost basis cannot carry over from the prior owner.

Common qualifying purchases at year-end include both new and used assets:

• Used production machinery acquired from an unrelated seller
• Refurbished technology and computer hardware
• Pre-owned business vehicles within weight and use limits
• New office build-outs and qualified improvement property
• Equipment financed through loans or leases structured as purchases

Financing does not reduce the deduction. A business that buys a $300,000 asset with a down payment and a loan still deducts the full $300,000 in the year it is placed in service, which is why year-end debt-financed purchases can be especially powerful for cash management. Interior office build-outs that qualify can also dovetail with a Home office deduction when the space supports the business.

Coordinating bonus depreciation with Section 179

Bonus depreciation and Section 179 expensing both allow immediate deductions, and the One Big Beautiful Bill Act enhanced both. Section 179 now carries a $2.5 million deduction limit with a $4 million phase-out threshold, indexed for inflation, while bonus depreciation has no dollar cap.

The two interact in a specific order. A business generally applies Section 179 first to selected assets, and then bonus depreciation applies to the remaining qualifying costs. Because the bonus is now a permanent 100%, many businesses can rely on the bonus alone and reserve Section 179 within a broader Depreciation and amortization plan, where its asset-by-asset flexibility is helpful.

Key differences guide which tool leads:

• Section 179 is capped and phases out at $4 million in purchases
• Bonus depreciation has no annual dollar limit
• Section 179 cannot create a business loss, while bonus depreciation can
• Both require the asset to be placed in service during the tax year
• Each election is reported on Form 4562 with the year's return

For a business making large year-end purchases, the no-cap, loss-generating nature of bonus depreciation often makes it the simpler primary tool, with Section 179 layered in where it adds value.

Vehicles and the year-end bonus depreciation rules

Business vehicles are a frequent year-end purchase and follow the same acquired-and-placed-in-service framework, with one extra layer. Passenger automobiles are subject to annual depreciation caps, while heavier vehicles used predominantly for business can qualify for far larger first-year deductions.

Heavier vehicles above the passenger-auto weight threshold, when used more than 50% for business, can be eligible for substantial bonus depreciation in the year placed in service. Lighter passenger vehicles remain subject to the luxury auto limits, which cap the first-year amount regardless of bonus eligibility. Tracking the business-use percentage is essential, and coordinating with a documented Vehicle expenses strategy protects the deduction.

The placed-in-service rule is just as strict for vehicles. A truck purchased on December 28 but not titled, registered, and put into business use until January is a 2027 deduction. Year-end vehicle buyers should leave time to complete registration and begin genuine business use before December 31.

The 40 percent transitional election option

The One Big Beautiful Bill Act included a transitional choice for businesses that did not want the full 100% deduction in the first year the new rules applied. While most businesses prefer the larger deduction, the election can matter for specific tax situations.

For the first taxable year ending after January 19, 2025, a taxpayer may elect to use 40% bonus depreciation instead of 100%, or 60% for certain long-production-period property and certain aircraft. The election applies on a class basis and is made with the return.

Reasons a business might consider a reduced election include:

• Smoothing deductions across higher-income future years
• Preserving income to use other expiring credits or deductions
• Managing the interaction with state rules that do not conform
• Avoiding a current-year loss that provides little immediate benefit

Most year-end buyers in a strong income year will take the full 100% deduction. Still, the option exists for those whose multi-year Depreciation and amortization plan favors spreading the benefit. A business can also elect out of bonus depreciation entirely for any class of property.

Documentation for year-end equipment purchases

The larger the deduction, the more important the records. A 100% write-off of a major asset draws attention, so the documentation must clearly establish both the eligibility tests and the property's business use.

Sound records connect the purchase, the placed-in-service date, and the business purpose. Reconstructed paperwork created after a notice arrives carries far less weight than contemporaneous files.

Essential documentation includes:

• Purchase invoices and any signed purchase agreement showing the acquisition date
• Delivery, installation, and acceptance records establishing the placed-in-service date
• Proof of first business use within the 2026 tax year
• Business-use percentage logs for vehicles and mixed-use assets
• Form 4562 and depreciation schedules filed with the return

Because state conformity to federal bonus depreciation varies widely, confirm your state treatment and filing dates against the relevant State Tax Deadlines before finalizing a large year-end purchase.

Pairing depreciation with other business strategies

Bonus depreciation works best inside a coordinated plan. The cash freed by a large first-year deduction can fund other strategies and strengthen the overall tax position across the business and its owners.

Entity structure shapes how the deduction flows. A Partnership or an S Corporation passes the deduction through to the owners' individual returns. At the same time, a C Corporation applies it to corporate income at a flat rate, so the right structure can affect how quickly the write-off reaches the people behind the business.

The permanence of the rules also rewards multi-year planning. Because the 100% rate is not expiring, businesses can build a steady capital expenditure schedule rather than rushing every purchase into a single year, timing each asset's placed-in-service date to the tax year where the deduction does the most good under the One Big Beautiful Bill Act.

Plan your 2026 year-end equipment deductions

Permanent 100% bonus depreciation makes a year-end equipment purchase one of the most reliable tax moves available in 2026, but the deduction hinges on clearing both the acquired and placed-in-service tests by December 31 and documenting each one carefully. Businesses that deliberately plan the timing capture the full first-year write-off rather than waiting a full year for the benefit.

Instead's comprehensive tax platform models each purchase before you commit, so you can see the tax savings a December buy delivers. Instead's intelligent system grounds every election in current law through tax research, builds depreciation schedules as tax workpapers, and records the placed-in-service position in tax memos for audit defense.

Generate plan summaries with tax reporting, confirm the numbers through a tax return review, and keep the capital plan moving with tax workflows. Then compare Instead's pricing plans and pick the right tier to start maximizing every depreciation dollar available this year.

Frequently asked questions

Q: Is 100% bonus depreciation still available in 2026 under the One Big Beautiful Bill Act?

A: Yes. Section 70301 of the One Big Beautiful Bill Act made 100% bonus depreciation permanent under Section 168(k) for qualified property acquired and placed in service after January 19, 2025. The prior phase-down to 40% and eventual elimination no longer applies, so 2026 purchases receive the full first-year deduction.

Q: Why does the placed-in-service date matter so much at year-end?

A: Bonus depreciation attaches to the year an asset becomes ready and available for use, not the purchase or delivery date. Equipment bought in December but still being installed or tested on December 31 is generally placed in service the following year, which shifts the deduction to that later tax year.

Q: Does used equipment qualify for 100% bonus depreciation?

A: Yes. Used property qualifies when it is new to your business, acquired by purchase from an unrelated party, and not previously used by you or a predecessor. This allows businesses to claim the full first-year deduction for quality pre-owned machinery, vehicles, and technology.

Q: How does bonus depreciation interact with Section 179 expensing?

A: A business generally applies Section 179 first, then bonus depreciation absorbs the remaining qualifying cost. Section 179 carries a $2.5 million limit with a $4 million phase-out and cannot create a loss, whereas bonus depreciation has no dollar cap and can generate a loss; as a result, many businesses use bonus depreciation as the primary tool.

Q: Can I still claim bonus depreciation if I finance the equipment?

A: Yes. Financing does not reduce the deduction. If you place a qualifying asset in service in 2026, you deduct its full cost that year, even if you pay for it over time through a loan or a lease structured as a purchase.

Q: What is the 40 percent transitional election?

A: For the first taxable year ending after January 19, 2025, a business may elect to claim 40% bonus depreciation instead of 100%, or 60% for certain long-production-period property and aircraft. The election is made by class on the return and can help businesses that prefer to spread deductions across future years.

Q: Which form reports bonus depreciation on my return?

A: Bonus depreciation and Section 179 expense are both reported on Form 4562, Depreciation and Amortization, filed with your tax return. The form documents each asset's cost, placed-in-service date, and the first-year deduction claimed.