Before You Buy It for the Write-Off: What 100% Bonus Depreciation Actually Means in 2026

We are approaching that magical time of year when business owners start asking one of our favorite tax questions:

“If I buy it before the end of the year, can I write it off?”

Sometimes the answer is yes.

Sometimes the answer is partially.

Sometimes the answer is, “Technically yes, but please do not spend $70,000 just to save $15,000 in taxes.”

And sometimes the answer is complicated enough that we need to put the Amazon cart down and talk first.

The good news for businesses planning equipment and capital purchases in 2026 is that federal tax law became considerably more favorable. The One Big Beautiful Bill Act permanently restored 100% additional first-year depreciation, commonly called bonus depreciation, for many types of qualified property acquired after January 19, 2025. Instead of gradually deducting the cost of qualifying assets over several years, many businesses can potentially deduct the full depreciable cost in the year the property is placed in service.

That is a meaningful tax-planning opportunity.

It is not, however, a reason to start buying things your business does not need.

What is 100% bonus depreciation?

Normally, when a business buys an asset that will be useful for several years, the tax deduction for that purchase is spread over the asset's depreciation period.

A computer might be depreciated over several years. The same goes for machinery, furniture, equipment, and many other business assets.

Bonus depreciation allows qualifying businesses to accelerate that deduction.

Under current federal law, certain qualified property acquired after January 19, 2025, may qualify for a 100% additional first-year depreciation deduction. The IRS issued updated guidance in January 2026 confirming that the 100% deduction was made permanent rather than continuing the phase-down that had previously been scheduled.

In plain English, a qualifying $40,000 piece of equipment may potentially generate a $40,000 depreciation deduction in the first year instead of having that deduction spread across multiple tax years.

Notice the word “potentially.”

Tax rules really love that word.

Does a 100% tax deduction mean the purchase is basically free?

No.

Please print that sentence out and tape it to the company credit card.

A deduction reduces taxable income. It does not reimburse you dollar for dollar for what you spent.

If your company spends $50,000 on equipment and qualifies for a $50,000 deduction, you have reduced the income subject to tax by $50,000. You have not magically received your $50,000 back.

The business still spent the cash.

That means the first question should never be, “Can we deduct it?”

The first question should be, “Does the business actually need it?”

Then we can talk about the tax treatment.

A purchase that improves capacity, replaces failing equipment, supports growth, increases efficiency, or was already part of the business plan may become even more attractive because of the available tax deduction.

Buying something unnecessary simply to create a deduction is still spending real money to avoid paying tax on only a portion of that money.

That math rarely improves because someone calls it a write-off.

What kinds of business purchases may qualify?

Bonus depreciation generally applies to certain depreciable property with a recovery period of 20 years or less, which can include a wide range of equipment, machinery, computers, furniture, and other tangible business property. Certain computer software and qualified improvement property may also qualify. Used property can potentially qualify too, provided the acquisition meets specific requirements, including rules involving prior use and related parties.

For many small businesses, that means purchases such as computers, production equipment, office furniture, tools, machinery, and some improvements may be worth discussing during year-end planning.

The rules are not the same for every asset, however. Land does not suddenly become depreciable. Buildings are generally subject to different depreciation rules, although certain improvements to nonresidential property can receive more favorable treatment.

This is one of those areas where the phrase “my friend said he wrote off his entire building” should probably trigger a few follow-up questions.

Buying it by December 31 is not necessarily enough

This is one of the easiest year-end tax-planning mistakes to make.

You do not generally get depreciation simply because you placed an order or paid for something before New Year's Eve.

The property needs to be placed in service.

The IRS defines property as placed in service when it is ready and available for its specific business use. Their own example involves a machine that was delivered in one year but could not operate until installation was completed the following year. The depreciation began in the later year because that was when the machine was actually ready and available for use.

So imagine you order a major piece of equipment on December 20.

It arrives January 8.

You probably do not have a December 2026 depreciation deduction simply because your credit card was charged before Christmas.

Or perhaps the equipment arrives December 27 but requires installation, electrical work, or configuration that is not completed until January.

Again, the placed-in-service date may fall in 2027.

That is why September is a much better time for this conversation than December 29.

If the tax treatment is influencing the timing of a purchase, you need enough runway to actually acquire, install, configure, and place the asset in service.

What is the difference between bonus depreciation and Section 179?

This is where two tax provisions frequently get mashed together.

Section 179 and bonus depreciation can both allow businesses to deduct the cost of qualifying property more quickly, but they are not identical.

For tax years beginning in 2026, the maximum Section 179 deduction is $2.56 million. That limit begins to phase out when the cost of qualifying Section 179 property placed in service during the year exceeds $4.09 million. Section 179 is also subject to a business-income limitation, meaning the deduction generally cannot exceed taxable income from the active conduct of a trade or business, although amounts disallowed because of that limitation may be carried forward.

Section 179 can also cover some categories of property that make it particularly useful for businesses improving commercial spaces. IRS guidance includes certain qualified improvement property as well as eligible roofs, HVAC property, fire protection and alarm systems, and security systems installed in nonresidential real property.

Bonus depreciation operates under a different set of rules and may provide another path to accelerated depreciation.

The better question is not necessarily “Which deduction is bigger?”

It is “Which strategy makes the most sense for this business?”

Sometimes taking every available deduction immediately makes sense.

Sometimes preserving depreciation for future years makes more sense.

Tax planning is not supposed to be a competition to see how close we can get taxable income to zero this year without thinking about next year.

What about buying a business vehicle?

Ah yes, the internet's favorite tax strategy.

Every December, social media fills up with some version of: “Buy a 6,000-pound SUV and write the whole thing off!”

Reality has a few more footnotes.

Different rules apply depending on the type of vehicle, its weight, its business use, and whether it falls under passenger automobile limitations or other vehicle provisions. For 2026, the Section 179 deduction specifically attributable to certain heavy SUVs is capped at $32,000, although other depreciation provisions may potentially apply as well.

Business use also matters.

For Section 179 treatment of listed property, the property generally needs to be used more than 50% in a qualified business use. If business use later drops to 50% or less, some previously claimed Section 179 deductions may have to be recaptured.

So before buying a giant SUV because someone on TikTok promised you a free Range Rover from the federal government, talk to your tax professional.

The federal government is not buying you a Range Rover.

Is taking the biggest possible deduction always the smartest tax move?

Not necessarily.

This is the part of year-end tax planning that gets lost when every conversation becomes “How much can I write off?”

Accelerating deductions into 2026 reduces taxable income in 2026.

That can be wonderful if 2026 is a particularly profitable year.

But it also means you may have less depreciation available in future years.

If the business expects significantly higher income next year, if ownership changes are coming, if you are preparing for a sale, or if other tax deductions and credits already have taxable income unusually low, automatically taking the largest possible depreciation deduction may not produce the best long-term result.

There can also be depreciation recapture when depreciated property is later sold. The IRS notes that gain on the disposition of depreciated property may be treated as ordinary income up to certain previously allowed depreciation amounts.

This is why we like tax planning before the transaction instead of tax explaining after it.

The deduction is one part of the decision.

Cash flow, financing, business need, future income, ownership plans, and the useful life of the asset belong in the same conversation.

Does Colorado follow the federal bonus depreciation rules?

Colorado business owners should also remember that federal and state tax treatment are related but not always identical.

Colorado's legislative tax analysis has historically identified the state as conforming to the federal treatment of bonus depreciation for individual and corporate income-tax purposes. At the same time, Colorado regularly adopts its own additions, subtractions, and other modifications to federal taxable income, and state lawmakers have continued modifying the treatment of certain federal business tax provisions.

Translation: do not assume that every federal deduction produces an identical Colorado result without looking at the full return.

Federal tax planning is the starting point.

The actual tax picture belongs to the business.

What should you do before making a year-end purchase?

If there is a meaningful business purchase on the horizon, September and October are excellent times to start asking questions instead of waiting for the year-end scramble.

Before committing the cash, we would want a business owner to work through five things:

1. Confirm that the business actually needs the purchase and that the timing makes operational sense.
2. Determine whether the asset qualifies for bonus depreciation, Section 179, regular depreciation, or another tax treatment.
3. Make sure the property can realistically be placed in service before December 31 if a 2026 deduction is part of the plan.
4. Look at projected 2026 income before deciding how aggressively to accelerate deductions.
5. Consider the business's cash position after the purchase. A great tax deduction is much less exciting if it creates a January cash-flow problem.

That last one matters more than people think.

Taxes should influence a good business decision.

They should not turn a bad business decision into a good one.

Frequently asked questions

Is 100% bonus depreciation available in 2026?

Yes, for qualifying property. Federal law permanently restored 100% additional first-year depreciation for certain qualified property acquired after January 19, 2025. Eligibility depends on the type of property and the applicable depreciation rules.

What is the Section 179 limit for 2026?

For tax years beginning in 2026, the maximum Section 179 expense deduction is $2.56 million. The deduction begins to phase out when qualifying property placed in service during the year exceeds $4.09 million.

Do I have to pay cash for equipment to depreciate it?

The depreciation rules focus on the taxpayer's basis in qualifying property and when that property is placed in service. Financing a purchase does not automatically prevent depreciation, although the transaction, ownership, business use, and financing structure still need to be properly recorded.

Can I buy equipment on December 31 and deduct it for 2026?

Only if the property otherwise qualifies and is placed in service during 2026. The IRS considers property placed in service when it is ready and available for its intended use. Ordering or paying for something before year-end does not necessarily satisfy that requirement.

Can used equipment qualify for bonus depreciation?

Potentially. Used property may qualify when it meets the applicable acquisition requirements, including restrictions involving prior use by the taxpayer and purchases from related parties.

Should I always take 100% bonus depreciation if I qualify?

No. The ability to take a deduction and the decision to take it are not always the same thing. Your current income, expected future income, other deductions, cash flow, ownership plans, and overall tax strategy can all affect whether accelerating depreciation makes sense.

A tax deduction should support the business, not run it

We love a good deduction.

Truly.

But there is a difference between tax planning and buying random things in December because you would rather give money to Office Depot than the IRS.

The strongest year-end tax decisions usually start with the business itself.

What do you need?

What are you already planning to buy?

What investment would actually make the company stronger?

What does cash flow look like?

What is taxable income likely to be?

Then we look at how the tax rules can support those decisions.

With 100% bonus depreciation available and significantly higher Section 179 limits in 2026, businesses have some powerful tools available. Used thoughtfully, those tools can help owners invest in equipment, technology, improvements, and growth while managing taxable income.

Used without a plan, they can also turn into a very expensive collection of things you did not actually need.

The tax code can help you decide when to make a good purchase.

It probably should not be the reason you make the purchase in the first place.

That is the difference between getting a tax deduction and doing actual tax planning.

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