Bonus Depreciation 2026: 100% Year-1 Write-Off on Rentals

The decision: Marcus’s $150,000 first-year write-off

Marcus, a single software engineer in Austin, Texas, earns $260,000 in W-2 wages — putting him in the 35% federal bracket. In March 2026 he closes on a $850,000 short-term rental near Lake Travis and runs it himself with an average guest stay under 7 days. He hears bonus depreciation is “only 40% now” and almost waits a year. That number is wrong.

Under OBBBA, bonus depreciation for 2026 is 100%. A cost-segregation study on his property reclassifies $150,000 of the basis (after backing out land) into 5-, 7-, and 15-year components — appliances, furniture, removable flooring, dedicated electrical, the dock, the deck, and landscaping. Every dollar in those buckets qualifies for the full first-year §168(k) write-off. Because his rental qualifies under the short-term-rental material-participation exception, the resulting loss is not passive — it offsets his W-2 wages.

The math: a $150,000 deduction against a 35% marginal rate (single, $250,526–$626,350 for 2026) is $52,500 of federal tax saved in year one. Texas has no state income tax, so there is no state add-on — or clawback. Marcus places the property in service in 2026 rather than waiting. Here is the full rule that drove the decision.

What actually changed: the OBBBA reversal

The Tax Cuts and Jobs Act of 2017 set bonus depreciation at 100% through 2022, then ramped it down: 80% (2023), 60% (2024), 40% (2025), 20% (2026), and 0% from 2027. That phase-down is the source of every “40% in 2026” article you will find — and it is now obsolete.

The One Big Beautiful Bill Act, signed in July 2025, permanently restored 100% bonus depreciation under IRC §168(k) for qualified property acquired and placed in service after January 19, 2025. There is no scheduled sunset this time. The IRS issued interim guidance in Notice 2026-11 confirming the mechanics. The result for any rental investor placing 5/15-year property in service in 2026: 100%, not 40%, not 20%.

One exception keeps the 40% alive: if your property was under a binding written contract dated before January 19, 2025, it stays on the old TCJA phase-down (40% for a 2025 placed-in-service date). Both the acquisition date and the placed-in-service date must clear the cutoff to get 100%. For a property you contract and close in 2026, this is a non-issue — you get 100%.

Why the building itself gets none of it

Bonus depreciation applies only to property with a MACRS recovery period of 20 years or less. Residential rental real estate is depreciated over 27.5 years; commercial over 39 years. The structural shell, the roof, the foundation, the framing — none of it qualifies for §168(k). If you buy an $850,000 rental and do nothing, you depreciate it slowly over 27.5 years at roughly 3.6% per year.

The entire game is moving as much basis as legally defensible out of the 27.5-year bucket and into the short-recovery buckets that qualify. That is what a cost-segregation study does — and why bonus depreciation and cost segregation are inseparable for real estate.

Cost segregation: the engine that feeds bonus depreciation

A cost-segregation study is an engineering-based analysis that reclassifies components of a building into their correct, shorter MACRS lives. On a typical residential rental, a study moves 20%–35% of the depreciable basis out of 27.5-year property into:

• 5-year property: appliances, carpet and removable flooring, window treatments, decorative lighting, furniture in a furnished rental.
• 7-year property: certain office and specialty equipment used in the rental operation.
• 15-year land improvements: driveways, sidewalks, fencing, landscaping, exterior lighting, docks, and site utilities.

All three of those buckets are 20 years or less, so all three are eligible for the 100% first-year write-off. On Marcus’s $850,000 purchase, after allocating ~$170,000 to non-depreciable land, the study identified $150,000 of qualifying short-life components — about 22% of the $680,000 depreciable basis. At 100% bonus, that entire $150,000 deducts in year one instead of dribbling out over decades.

The worked math at three marginal rates

The deduction is the same $150,000 regardless of who takes it. Its value depends entirely on your marginal rate. Using the 2026 federal brackets:

Marcus, at $260,000 of wages, lands in the 35% bracket, so his $150,000 write-off is worth $52,500 in year-one federal tax. A landlord at $220,000 of income (32% bracket) gets $48,000. The deduction does not change — your bracket decides how much it is worth, which is why when you place property in service matters even though the percentage no longer phases down.

What most people get wrong: the deduction is useless if it’s trapped

The biggest misconception is that a $150,000 bonus deduction automatically cuts your tax bill by tens of thousands. It does not — rental losses are passive losses by default under IRC §469, and passive losses can only offset passive income, not your W-2 wages or business income. A doctor who buys a long-term rental, cost-segregates it, and generates a $150,000 loss often finds that loss suspended, carrying forward with zero current-year benefit.

There are exactly two ways to unlock the loss against ordinary income:

1. Real estate professional status (REPS). Under IRC §469(c)(7), if you spend more than 750 hours and more than half your total working time in real property trades, plus materially participate in the rental, the losses become non-passive. This is realistic for a full-time investor or a non-working spouse — not for someone with a full-time W-2 job.
2. The short-term-rental exception. If the average guest stay is 7 days or less, the activity is not a “rental” under the §469 regulations at all — it is a trade or business. You only need to materially participate (e.g., the 100-hour-and-more-than-anyone-else test), with no 750-hour requirement. This is how Marcus, a full-time engineer, legally uses his $150,000 loss against his W-2 wages.

That STR pathway is the difference between Marcus’s $52,500 of real cash-tax savings and a suspended loss worth nothing this year. The bonus-depreciation percentage is the easy part; the loss-limitation rules are where the money is made or lost.

A second common error is forgetting to allocate basis to land. Land is never depreciable, so before you compute any deduction you must split the purchase price between land and improvements — typically using the county assessor’s ratio or an appraisal. On Marcus’s $850,000 purchase, roughly $170,000 was land, leaving $680,000 of depreciable basis. Skip this step and you overstate the deduction the IRS will accept. A third trap: the cost-seg study itself must be defensible. A “rule of thumb” allocation scribbled on a napkin invites disallowance; an engineering-based study with a written report is what survives examination and supports the 5-, 7-, and 15-year classifications that feed the 100% write-off.

Section 179 vs. bonus depreciation for landlords

Both let you expense property in year one, but they behave differently — and for rental real estate, bonus usually wins:

For a landlord whose whole point is generating a loss to shelter income, §179’s “no loss” rule is disqualifying — even with OBBBA raising the §179 cap to $2.56M for 2026, the deduction is still limited to taxable business income and cannot push you into a loss. The uncapped, loss-permitted 100% bonus is the right tool. Many investors elect §179 on a handful of specific items and let 100% bonus sweep up everything else the cost-seg study surfaces.

The recapture you must model before you celebrate

Bonus depreciation is a timing strategy, not free money. When you sell, the accelerated deductions are recaptured:

• §1245 personal property (the 5- and 7-year items): recaptured as ordinary income to the extent of depreciation taken — up to your top rate, as high as 37%.
• §1250 real property components (the 15-year land improvements and any structural depreciation): the depreciation portion is taxed as unrecaptured §1250 gain at up to 25% per IRC §1(h).

The strategy still wins because you take the deduction at a known high rate today and pay recapture later (a time-value advantage), and because recapture is capped at 25% on the real-property piece while your front-end savings ran at 32%–35%. The cleanest escape is a 1031 like-kind exchange: roll the proceeds into a replacement property within the 45-day identification and 180-day closing windows and defer all of the recapture and gain. If you intend to hold long-term or 1031 at exit, the recapture concern is largely theoretical.

The decision lever

Stop optimizing for a phase-down that no longer exists. The percentage is locked at 100% — permanently — so the lever that moves your tax bill is three things, in order: (1) run a cost-segregation study to maximize the 5/15-year basis eligible for the write-off; (2) place the property in service in the year your marginal rate is highest, because a $150,000 deduction is worth $36,000 at 24% but $52,500 at 35%; and (3) make sure the resulting loss is usable — qualify for real estate professional status or run the property as a sub-7-day short-term rental with material participation, or the deduction sits suspended. Get those three right and a single 2026 acquisition can erase $50,000 of tax this year.