100% Bonus Depreciation Is Back in 2026: What Business Owners Need to Know
After several years of phasing down, 100% bonus depreciation is back, and this time it is permanent. The One Big Beautiful Bill Act restored the full first-year write-off for qualifying property, which means a business that buys equipment can now deduct the entire cost in the year it is placed in service rather than spreading it out over many years. With the second half of 2026 being the stretch when a lot of capital purchases happen, this is a good moment to understand how the rule works and how to use it well.
The largest possible deduction is not automatically the best one for your tax bill. In a strong year, writing off the full cost right away is often exactly right, but in others, spreading the deduction across future years can be the better choice, depending on how this year’s income compares with the years ahead. This guide covers what bonus depreciation is, how it compares to Section 179, what qualifies, and how to weigh that choice.
What Bonus Depreciation Is
Normally, when a business buys a long-lived asset like a machine or a vehicle, it cannot deduct the whole cost at once. Instead it depreciates the asset, spreading the deduction across the years the asset is expected to last. Bonus depreciation breaks that pattern. It lets you deduct the full cost of qualifying property in the first year, all at once.
The benefit is cash flow. A deduction lowers your taxable income, so writing off the entire cost of a purchase up front reduces this year’s tax bill instead of trickling the savings out over a decade. For a business reinvesting in itself, getting that money back sooner can fund the next purchase, cover payroll, or simply keep more cash in the business when it is needed most.
What Changed Under the New Law
Bonus depreciation has been on a roller coaster. It was set at 100% under the 2017 Tax Cuts and Jobs Act, then began stepping down by 20 points a year, falling to 60% in 2024 and 40% in 2025, on a path to disappear entirely by 2027.
The One Big Beautiful Bill Act reversed that. It restored the rate to 100% for qualifying property acquired and placed in service after January 19, 2025, and, importantly, made the 100% rate permanent. The practical effect is certainty. Instead of timing purchases around a shrinking percentage that was scheduled to vanish, business owners can now plan capital investments knowing the full write-off will still be there next year and the year after.
Section 179 vs. Bonus Depreciation
Bonus depreciation is often confused with Section 179, because both let a business deduct the cost of an asset in the first year instead of over time. They are different tools, though, and the differences matter when you are planning a purchase.
Section 179 lets you deduct the cost of qualifying property up to an annual dollar limit, and you can apply it selectively, asset by asset. Its catch is that it cannot create a loss: your Section 179 deduction is capped at your taxable income for the year. Bonus depreciation has no dollar limit and applies automatically to a whole class of property unless you opt out, and it can push your business into a net loss that carries forward to offset future income.
Here is how the two compare for 2026:
| Section 179 | Bonus depreciation | |
| Deduction | Up to $2,560,000 | 100% of cost, no dollar cap |
| Phase-out | Begins above $4,090,000 of purchases | None |
| Income limit | Cannot exceed taxable income (no loss) | Can create a loss that carries forward |
| How it applies | Selectively, asset by asset | To an entire class of property, unless you opt out |
| Used property | Qualifies, if new to you | Qualifies, if new to you |
In practice, the two are often used together: Section 179 for precise, selective deductions up to its limit, and bonus depreciation to write off the rest. Which combination is best depends on your numbers, which is the kind of thing worth modeling before you buy rather than after.
What Qualifies
Bonus depreciation covers a broad range of business property. As a general rule, it applies to tangible property with a recovery period of 20 years or less, which sweeps in most of what a business actually buys:
- Machinery and manufacturing equipment
- Computers, technology, and off-the-shelf software
- Office furniture and fixtures
- Certain business vehicles, subject to separate limits
- Qualified improvement property, meaning interior improvements to non-residential buildings, not structural work, building additions, or elevators and escalators
- Certain film, television, live theatrical, and sound recording productions
Used property qualifies for the full 100% as well, as long as it is new to you and not bought from a related party. That has been true since the 2017 law and carries forward unchanged, so businesses buying pre-owned equipment can claim the same upfront deduction as those buying new.
What this looks like varies by industry. A restaurant might write off ovens, refrigeration, and point-of-sale systems. A medical practice might write off exam tables and diagnostic machines. A construction company might write off heavy equipment and trucks, and a professional services firm might write off computers and office buildout. Buildings themselves generally do not qualify, since they depreciate over much longer periods. There is one important exception, covered next, for certain production facilities.
Qualified Production Property
There is one notable exception to the rule that buildings do not qualify. The new law created a temporary break called qualified production property, which lets certain manufacturing and production facilities be written off in full in the year they are placed in service, something real estate almost never allows. Unlike regular bonus depreciation, which applies automatically unless you opt out, this one works in reverse: you have to elect to take it.
The catch is that it is narrowly defined. The building has to be used as an integral part of a “qualified production activity,” which the law limits to:
- Manufacturing, producing, or refining a product in a way that substantially transforms the materials that go into it.
- Production that is strictly agricultural or chemical, not production in the broader sense.
- Making a tangible product, which rules out food or beverages prepared and sold on-site, so a restaurant kitchen would not count.
The property itself also has to meet several conditions. It must be the portion of a nonresidential building placed in service in the United States or a U.S. territory, used by you as an integral part of that production activity, and generally new to you, with a limited exception for used property. The timing windows are strict: construction has to begin after January 19, 2025 and before January 1, 2029, and the building has to be placed in service after July 4, 2025 and before January 1, 2031. You also need to keep it in qualified production use for at least ten years, or part of the deduction can be clawed back.
For most businesses this will not apply. But if you are building, expanding, or upgrading a manufacturing or production facility, it can be one of the largest deductions available, and the strict timing means the planning needs to start early, ideally before construction begins. This is the kind of decision worth bringing to us at the outset.
When Taking Less Than 100% Makes Sense
Because the 100% deduction applies automatically, the default is to write off the entire cost of a purchase in the year you place it in service. For a business having a strong, profitable year, that is usually the right move, since the deduction offsets income that would otherwise be taxed at a high rate.
But you are not required to take it all now. You can instead elect out and spread the deduction over future years. Three situations make that worth considering.
Smoothing income across years
You are not locked into claiming the whole deduction the moment you buy. If this year is lean and next year looks far stronger, taking the full write-off now lands it against lightly taxed income, while spreading it forward moves more of the deduction into higher-taxed years, where it saves more tax overall. Electing out also makes your taxable income steadier from year to year and lets you line up deductions with the years your income actually arrives, which can matter as much as the size of the deduction itself.
Managing a net operating loss
Because bonus depreciation has no income limit, a large write-off can push your business into a net operating loss. That is not automatically a problem, but a loss carried into future years can only offset up to 80% of income in any given year, so a deduction large enough to create more loss than you can use can leave value stranded. Electing out keeps part of the deduction in reserve for later years, which is often the better outcome if you expect to be more profitable, and taxed at a higher rate, down the road.
Avoiding a higher state tax bill
This is one of the most common reasons to elect out, and it catches a lot of owners by surprise. Many states do not follow the federal bonus depreciation rules, or follow them only in part. California, New York, New Jersey, and Pennsylvania are common examples. When a state decouples this way, you generally have to add the federal deduction back to your state taxable income and then recover it slowly over several years on the state’s own schedule. In a state that requires adding back the full amount, you can end up with a large federal deduction but little or no state deduction in the same year, which raises your current state tax bill. Electing out of the federal deduction can avoid that addback, spare you from keeping two separate depreciation schedules, and cut down the compliance work, especially if you file in more than one state.
Your Alternatives to the Full Deduction
If one of those situations points you toward taking less, you have two ways to do it. One is available in any year. The other applies only to purchases you made in 2025.
Electing Out and Using MACRS
The standard option, available in any year, is to elect out of bonus depreciation for an entire class of property. Instead of the full first-year write-off, that property depreciates over its normal MACRS schedule, the regular cost-recovery method, which spreads the deduction across the asset’s useful life. Most business equipment falls into a five- or seven-year recovery period, so you would deduct a portion of the cost each year over that span rather than all of it at once. You do not lose any of the deduction this way. You simply claim it gradually, which is exactly what makes electing out useful when spreading the write-off serves you better than taking it all now. The election is made by class of property rather than asset by asset, and it is generally irrevocable once made, so it is worth settling before you file.
A Time-Sensitive Option for 2025 Purchases
If you placed equipment in service during 2025, there is a one-time option for that first tax year: you can elect a reduced 40% rate (60% for longer production period property and certain aircraft) instead of the full 100%. It works on the same income-smoothing logic as electing out.
The election has to be made on a timely filed return, and that includes extensions. If you are on extension and have not filed your 2025 return, the choice is open until your deadline, around September 15 for partnerships and S corporations and October 15 for C corporations, sole proprietors, and individuals. If you have already filed without making it, there is no guaranteed do-over, so the real point is to decide before you file. Either way, if you bought equipment in 2025, it is worth a conversation soon.
Whichever option you weigh, a large first-year deduction also ripples through the rest of your return, including your qualified business income deduction, so a major purchase is worth looking at against your whole tax picture rather than in isolation. For most owners in a typical year, though, the full 100% remains the right answer.
A Few Things to Do Now
- Keep detailed records of each purchase. Track the exact cost, acquisition date, and placed-in-service date for every asset. These timelines dictate both your eligibility and your deduction rate under the new rules.
- Weigh the write-off before buying. For large capital investments, compare a 100% upfront write-off against a smaller, spread-out deduction. The biggest immediate deduction is not always the best move for your long-term income smoothing.
- Verify state tax rules first. Always check how your specific state treats bonus depreciation before counting on the full tax benefit. State decoupling can leave you with a surprise local tax bill.
- Settle your 2025 elections. If you purchased equipment during the 2025 transition year and have not yet filed your return, map out your election choices before the deadline strikes.
- Consult us before you buy or file. Bring your asset plans to us early. We will ensure your numbers are modeled correctly and your paperwork is right the first time.
The Bottom Line
Bonus depreciation is one of the most useful tools a business owner has for managing taxes and cash flow, and with the 100% rate now permanent, it is here to stay. The full write-off can dramatically lower this year’s tax bill and free up cash to reinvest. But the largest deduction is not automatically the smartest one, and the right call depends on your income this year, your outlook for next year, your entity, and your state.
That is where we come in. At Eco-Tax, we help business owners make these calls with the full picture in view: modeling 100% versus a smaller deduction, timing purchases for the most benefit, making the right elections correctly on your return, and coordinating it all with your bookkeeping and broader tax plan. If you are weighing an equipment purchase, or you bought in 2025 and have not yet filed, let’s talk it through before the decision is locked in.
