100% Bonus Depreciation Is Back: What OBBBA Means for Real Estate Investors

For the past two years, I have been running every acquisition through a depreciation model built around diminishing returns.

In 2023, bonus depreciation dropped to 80%. In 2024, to 60%. In 2025, it fell again — to 40% — and every deal I underwrote adjusted accordingly. Most active investors are still carrying that same 40% assumption into 2026. I was.

That assumption is now wrong.

The One Big Beautiful Bill Act (OBBBA), signed into law on July 4, 2025 as Public Law 119-21, permanently reinstated 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. Not a temporary extension. Not subject to another phase-down cycle. Permanent.

For context: on a $500,000 acquisition where a cost segregation study identifies $150,000 of short-life components, the difference between a 40% and 100% bonus depreciation allowance is approximately $90,000 in additional first-year deductions. That changes which deals pencil — and which investors benefit most.

Below, we break down what qualifies, how to structure a cost segregation study around this change, and why the right tax professional makes all the difference in 2026.

What Bonus Depreciation Is and Why It Matters

When you buy a rental property, the IRS does not let you deduct the purchase price in the year you buy it. Instead, you depreciate the building over 27.5 years — roughly $3,600 per year for every $100,000 of building value. That is standard depreciation: slow, steady, and limited.

Bonus depreciation works differently. It allows you to immediately write off a percentage of certain property components in the year you place them in service — not spread over decades. The “bonus” is the acceleration. Instead of waiting years to deduct the value of a commercial-grade appliance or an HVAC system, you take that deduction in Year 1.

For real estate investors, this acceleration is a cash flow multiplier. A $150,000 immediate deduction at a 30% effective tax rate translates to approximately $45,000 in tax savings in Year 1. That is money that does not go to the IRS — money you can redeploy into the next deal.

What the OBBBA Changed

The phase-down of bonus depreciation was baked into law under the Tax Cuts and Jobs Act of 2017. From the moment it passed, the clock was ticking: 100% through 2022, dropping 20 percentage points per year until it reached zero in 2027. Most experienced investors adjusted their underwriting accordingly. Deals that penciled beautifully in 2022 looked thinner by 2025 — the depreciation advantage was shrinking with every calendar year.

The One Big Beautiful Bill Act, signed July 4, 2025, ended that countdown. The OBBBA permanently reinstates 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025. Not a temporary extension with another sunset baked in. Not subject to another phase-down cycle. Permanent.

This is a structurally different outcome than the one-to-three-year extensions investors have seen before. Prior extensions kept everyone in a “use it before it expires” posture — accelerating acquisitions and improvements ahead of another cutoff. That urgency is now gone. The 100% write-off is codified without an expiration date, which changes how you model long-term deal returns.

There is also a look-back element that many 2025 buyers have not accounted for. Because the 100% allowance applies to qualifying property acquired and placed in service after January 19, 2025, property you closed in 2025 under the old 40% assumption is already eligible for the full write-off — 100% is the default, and the election in the statute runs the other way: for the first tax year ending after January 19, 2025 you may elect 40% (60% for long production period property) instead. If you already filed a return for that year claiming 40%, your tax strategist can correct it with an amended return, or a Form 3115 accounting method change where that is the right path. This is educational, not tax or legal advice.

What Qualifies — and the Role of Cost Segregation

Not every dollar you invest in a property qualifies for bonus depreciation. The IRS restricts the benefit to property with a Modified Accelerated Cost Recovery System (MACRS) class life of 20 years or less. The building structure itself — 27.5 years for residential, 39 years for commercial — does not qualify. Neither does land.

What does qualify:

• Personal property components: Appliances, carpeting, cabinetry, light fixtures, and HVAC equipment — anything that is not structurally part of the building envelope

• Land improvements: Parking lots, driveways, landscaping, and fencing, which carry a 15-year class life

• Qualified Improvement Property (QIP): Interior improvements to nonresidential buildings, also at 15 years

The challenge is identifying those qualifying components. The IRS does not provide a categorized breakdown — that is the purpose of a cost segregation study.

A cost segregation study is an engineering-based analysis that reclassifies building components into shorter depreciation lives. A qualified engineer examines the property and produces a report that separates 5-year, 7-year, and 15-year components from the 27.5-year building structure.

The numbers shift substantially. On a $500,000 acquisition, a cost segregation study might identify $100,000 to $180,000 in qualifying short-life components. At 100% bonus depreciation, that entire identified amount is deductible in Year 1.

Studies typically cost $5,000 to $15,000 for residential and small multifamily properties. That upfront cost almost always pays for itself in first-year tax savings — which is why the math on committing to a cost seg study has never been cleaner than it is right now.

On a $500,000 acquisition where a cost segregation study identifies $150,000 of short-life components, that shift converts $150,000 of 27.5-year basis into 5-, 7-, and 15-year property — deductible in Year 1 instead of over nearly three decades. The 30% effective rate used earlier is an illustration only; your own rate decides what those deductions are worth in cash.

J. Massey on Bonus Depreciation, Tax Strategy, and What New Investors Get Wrong

Three direct questions for J. Massey — investor, educator, and host of CashFlowDiary.com — on what the OBBBA means for the investors he works with.

Q: You have said “get a tax strategist, not a CPA.” How does 100% bonus depreciation change the math for someone buying their first rental in 2026?

“A CPA is looking backwards. They take what happened and file it. A tax strategist looks forward — they’re in your deals before you close, structuring things so you capture every available benefit. For someone buying their first rental in 2026, 100% bonus depreciation is the single biggest lever they have in Year 1. We’re talking about potentially wiping out an entire year of W-2 income if you qualify as a real estate professional. But you have to plan for it in advance. If you close on a property in December and call your CPA in April, you may have already missed the window to commission the cost seg study and document the professional hours. Get a tax strategist, not a CPA.”

— J. Massey, CashFlowDiary.com

Q: What types of properties or improvements benefit most from this tax change?

“Short-term rentals and value-add multifamily. With a short-term rental, you’re furnishing the property — furniture, appliances, electronics — and all of that is 5-year personal property eligible for bonus depreciation. Every dollar you spend furnishing a vacation rental is a potential Year 1 write-off. For value-add multifamily, you’re doing kitchen and bath upgrades, replacing flooring, updating HVAC. Again, all short-life property when segregated properly. The investors who benefit most are doing the work: buying properties that need improvement and making those improvements in the same year they’re placed in service. They’re stacking the acquisition deduction with the improvement deduction.”

— J. Massey, CashFlowDiary.com

Q: What is the biggest misconception about depreciation among newer real estate investors?

“That it’s complicated, or only for big operators. I hear this constantly. People think cost segregation studies are for apartment complexes and commercial buildings. They’re not. I’ve seen investors get meaningful studies done on single-family rentals. The threshold question is simple: does the potential Year 1 deduction exceed the cost of the study? On most acquisitions above $300,000 with any personal property component, the answer is yes. The second misconception is that you have to be a full-time investor to benefit. You don’t — you need a tax strategist who understands the real estate professional rules and structures your hours correctly. Most investors are leaving five figures on the table every year because they haven’t had that one conversation.”

— J. Massey, CashFlowDiary.com

How to Act Now

The OBBBA permanently changed the depreciation landscape. The phase-down is gone — but capturing the full benefit still requires deliberate action in the right sequence.

Step 1: Engage a tax strategist before your next acquisition closes. Not after closing. Not at tax time. Before. A tax strategist can review the purchase agreement, advise on how to allocate value between land, building, and personal property, and commission a cost segregation study while the transaction is still in motion. The CFD Tax Strategy Training covers how to identify and vet qualified tax strategists who work specifically with real estate investors.

Step 2: Commission a cost segregation study on every qualifying property. For most acquisitions above $300,000 with significant personal property or improvement components, a cost seg study pays for itself in Year 1 at 100% bonus depreciation. The study needs to be completed in the same tax year the property is placed in service — do not wait until Q4.

Step 3: If you acquired and placed property in service after January 19, 2025, review how it was reported. The reinstated 100% allowance means you may be entitled to the full deduction on a property you already undermodeled at 40%. Your tax strategist can file an amended return or adjust your current-year position accordingly.

The math changed on January 19, 2025. Most investors are still running 2025 assumptions. That gap is where opportunity lives.

The OBBBA didn’t just extend a tax break — it locked in a new permanent reality for real estate investors. Full first-year write-offs on qualifying property acquired and placed in service after January 19, 2025 are now the baseline, not a bonus.

That matters because timing is everything. You cannot go back and recapture years when you left money on the table. A cost segregation study paired with 100% bonus depreciation can transform the tax profile of a property you’re buying this year — but only if you have the right advisor running the numbers before closing, not after.

J. Massey says it plainly: you need a tax strategist, not a CPA. There is a difference, and that difference is your cash flow.

Ready to build the tax strategy that goes with this? Book J. Massey’s free 30-minute STR Diagnostic Call and leave with one concrete next move for your own portfolio — including how to sequence a cost segregation study before your next close.

Frequently Asked Questions

When was the One Big Beautiful Bill Act actually signed?
July 4, 2025. It is Public Law 119-21, and the govinfo record lists that date approved. Any 2026 date is wrong. The depreciation test in the law is not tied to the signing date anyway — it is tied to when the property was acquired and placed in service. This is educational, not tax or legal advice.

Which property qualifies for the 100% allowance?
Qualifying property acquired and placed in service after January 19, 2025, with a recovery period of 20 years or less. That covers 5-year personal property, 15-year land improvements, and Qualified Improvement Property. The building shell — 27.5 years residential, 39 years nonresidential — and land do not qualify. This is educational, not tax or legal advice.

I closed in 2025 and used 40%. Can I fix it?
Likely yes. For property acquired and placed in service after January 19, 2025, 100% is the default rate, so if a filed return used 40% your tax pro can look at an amended return or a Form 3115 accounting method change. Bring them the closing documents and the cost segregation report. This is educational, not tax or legal advice.

Is there any reason to elect 40% instead of 100%?
The statute allows an election for the first tax year ending after January 19, 2025 that substitutes 40%, or 60% for long production period property. Operators use it when a huge first-year loss would be wasted: passive activity limits, a low-income year, basis or partner allocation problems. Ask your tax pro to model both. This is educational, not tax or legal advice.

Does a cost segregation study make sense on a single-family rental?
It can. The test is whether the first-year deduction beats the study fee and your advisor's time. On acquisitions above roughly $300,000 with real personal property or furnishings, it usually does. Get the study commissioned in the same tax year the property is placed in service. This is educational, not tax or legal advice.

Sources

• Public Law 119-21 (One Big Beautiful Bill Act) — govinfo record, Date Approved — OBBBA signing date is July 4, 2025, not April 2026

• Full text of Public Law 119-21, bonus depreciation election language — The statutory election is to use 40% (60% for long production period property) for the first taxable year ending after January 19, 2025, not a retroactive election to get 100%

• IRS Publication 946, How To Depreciate Property (2025) — 100% allowance reinstated for property acquired and placed in service after January 19, 2025; 40% limit for property acquired before January 20, 2025; enactment July 4, 2025; 27.5-year residential and 39-year nonresidential recovery periods

• IRS Instructions for Form 4562, Depreciation and Amortization — Where the special depreciation allowance is claimed, and the split between property acquired before January 20, 2025 and after January 19, 2025

• IRS FAQ: Additional First Year Depreciation Deduction (Bonus) — Bonus depreciation is the section 168(k) additional first year depreciation deduction and can apply to used property meeting the requirements

• IRS — About Form 3115, Application for Change in Accounting Method — Form 3115 is the depreciation accounting method change route, one of the two ways to fix a property reported at the wrong bonus rate

• IRS One, Big, Beautiful Bill Act provisions hub — IRS guidance hub for OBBBA, with provision effective dates keyed to July 4, 2025

Related guides

• The STR tax loophole, explained

• Short-term rental investing guide