Oregon’s 2026 Tax Disconnect: Bonus Depreciation Changes
Starting January 1, 2026, Oregon is stepping away from federal bonus depreciation rules. The state now requires businesses and property owners to add back 100% of bonus depreciation deductions claimed federally and spread those deductions over the useful life of the property instead—typically five to seven years for commercial buildings and tenant improvements.
This divergence creates a meaningful tax planning gap for anyone upgrading commercial property, performing tenant improvement buildouts, or purchasing equipment in Oregon. The rule change, codified under SB 1507, puts roughly $267 million back into the state’s general fund over the next 18 months. For property owners and operators, it means bonus depreciation no longer delivers the immediate deduction benefit it did in prior years.
Frequently Asked Questions
Q: Does Oregon’s bonus depreciation disconnect affect me if I operate in multiple states?
A: Only the Oregon portion of your property, improvements, or equipment is subject to the state’s add-back requirement. If you own a building in Portland and another in Seattle, only the Oregon property triggers this rule on your Oregon return. Multi-state operators need separate depreciation schedules by state.
Q: Can I still claim 100% bonus depreciation federally under the One Big Beautiful Bill Act?
A: Yes. Federal rules (restored by OBBBA) still allow 100% bonus depreciation for qualifying property. You claim it on your federal return. Oregon, however, requires you to add that amount back and recapture it over the property’s life on your state return.
Q: Which properties trigger the add-back requirement?
A: Any tangible property placed in service in Oregon during a tax year beginning on or after January 1, 2026. This includes commercial buildings, tenant improvements, machinery, equipment, and fixtures. Land itself does not depreciate, but land improvements do.
Q: How long does the add-back requirement last?
A: Until the property is fully depreciated under the standard useful-life schedule. A five-year property spreads the deduction over five years; a 39-year building property over 39 years. The add-back effectively delays the deduction—it doesn’t eliminate it.
The Federal-State Disconnect: What Changed
The One Big Beautiful Bill Act (OBBBA) maintained federal 100% bonus depreciation through 2026 and then phases it down starting in 2027. Oregon, however, decided not to conform to this federal allowance beginning in 2026. Under SB 1507, Oregon treats bonus depreciation as a state tax adjustment.
When you place property in service in Oregon in 2026 or later and claim federal bonus depreciation, your Oregon return requires an addition. That addition reverses the first-year deduction. The deduction then flows back in equal annual portions over the property’s depreciable life using standard MACRS or real property recovery periods.
This is a state-level revenue measure. Oregon’s Department of Revenue calculated the change would preserve $267 million in state tax revenue over 18 months. For commercial property owners and investors, that translates to higher state tax liability in 2026 compared to prior years, even when federal treatment remains favorable.
How Oregon’s SB 1507 Impacts Commercial Property Upgrades
Commercial property owners frequently bundle improvements into larger capital projects: roof replacements, HVAC system upgrades, parking lot rehabilitation, tenant improvement allowances, and building system updates. Under prior rules, 100% of qualifying improvements could be deducted in year one federally and, under Oregon conformity, on the state return.
Starting in 2026, that federal benefit still applies on your federal return. On your Oregon return, you add back the bonus depreciation amount and recapture it over the improvement’s useful life. A $500,000 roof replacement, for example, would generate a federal deduction of $500,000 in 2026. On your Oregon return, you add that $500,000 back (reducing your state deduction to zero in year one), then claim annual deductions of approximately $20,000–$33,000 depending on the roof’s recovery period.
The practical effect: higher Oregon taxable income in 2026, reduced income in years two through five or beyond. Property owners should factor this into cash flow projections and tax planning. The state add-back also requires careful documentation. A separate depreciation schedule for Oregon property becomes essential, particularly for owners with mixed-state portfolios.
State Tax Implications for Businesses and Investors
The depreciation disconnect affects both C corporations and pass-through entities (S corporations, LLCs, partnerships). Individual property owners and small business operators see the impact differently than large institutional investors, but all face the same add-back requirement.
For operating businesses—retail tenants, manufacturers, hospitality operators—tenant improvements and leasehold upgrades now carry a different state tax profile. If you invest $250,000 in buildout for a commercial lease, that entire amount generates a federal first-year deduction under OBBBA. Oregon requires an add-back. You’ll carry a larger taxable income figure on your Oregon return in 2026 but recoup the deduction over subsequent years.
For real estate investors and property owners, the disconnect affects the after-tax return on capital improvement projects. A $2 million building renovation yields strong federal tax-saving benefits but requires Oregon-specific calculations to model the true state-level impact. This is particularly relevant for owners considering significant upgrades or purchases timed around the 2026 transition.
Pass-through entities also need to ensure partner and member schedules reflect the Oregon add-back. An LLC taxed as a partnership must show each member’s share of the adjustment, since the add-back flows through to individual Oregon returns.
Documentation and Compliance Requirements
The IRS already requires depreciation schedules for bonus depreciation claims. Oregon’s add-back requirement means those schedules must now include state-specific information. Your depreciation schedule should clearly identify property placed in service in Oregon in 2026 or later, the bonus depreciation amount claimed, and the remaining deduction schedule under standard recovery periods.
Keep detailed records of acquisition dates, cost bases, and improvement classifications. When property qualifies for bonus depreciation, confirm its placed-in-service date in Oregon. Some purchases made late in 2025 might be placed in service after January 1, 2026, triggering the rule even though the acquisition occurred before. Installation and operational commencement dates matter.
The Oregon Department of Revenue expects filers to compute the add-back adjustment on their returns. Most tax software will require manual adjustment or a separate state depreciation schedule. Consult your CPA or tax advisor to ensure your depreciation methodologies properly reflect the state add-back before filing.
Tax Planning Strategies for 2026 and Beyond
One consideration: the timing of property purchases and improvements. A building renovation completed and placed in service before January 1, 2026 avoids the add-back requirement entirely. Projects placed in service on or after that date trigger it. For owners planning substantial improvements, evaluating acceleration into late 2025 may reduce state tax exposure, though this depends on cash flow, interest rates, and contractor availability.
Another approach involves evaluating the property’s useful life classification. Improvements with shorter recovery periods (five years) recoup the deduction faster than those with longer periods (39 years for real property). While the add-back rule doesn’t permit choosing accelerated schedules, understanding the recovery period helps model long-term tax impact.
For acquisitions or joint ventures involving Oregon property, the bonus depreciation disconnect should factor into purchase price allocation and cost-sharing agreements. If you’re buying a property with existing improvements and the deal closes after January 1, 2026, the step-up in basis will be subject to the add-back rule if you claim bonus depreciation.
Entity structure also plays a role. Properties held by separate Oregon-domiciled entities versus out-of-state entities face the same add-back rule on Oregon returns. Multi-state operators with centralized accounting should implement separate depreciation schedules by domicile state to avoid errors.
What This Means for Tenant Improvement Allowances
Commercial landlords and tenants both need to understand the depreciation implications of tenant improvement buildouts, particularly when an allowance is provided. A $100,000 TI allowance funded by the landlord and capitalized to leasehold improvements generates a deduction for the improving party. If the tenant makes the improvement, the tenant’s Oregon return reflects the add-back. If the landlord funds it, the landlord’s Oregon return reflects it.
Lease negotiations in 2026 and beyond should account for this tax shift. A tenant’s after-tax cost of tenant improvements rises because the federal bonus deduction benefit no longer flows directly through Oregon. Landlords, conversely, can model the impact on their own depreciation schedules. For tenant improvement allowance considerations in Portland, this becomes a material lease economics factor.
Evaluating Long-Term Capital Improvements
Capital expenditure decisions now require dual-state tax modeling. A project generating strong federal returns might have more modest state returns in year one, with recovery over time. Building systems, HVAC upgrades, energy-efficient equipment, and other property improvements should be evaluated under both federal and Oregon tax frameworks.
Some property owners may find that the after-tax return on improvements remains compelling despite the state-level delay. Others might defer projects, replan them, or structure them differently. The key is intentional planning rather than assuming prior-year tax treatments still apply.
For commercial real estate due diligence in Portland, this tax shift is now a standard evaluation point. Appraisers, investors, and financial advisors all need current knowledge of Oregon’s bonus depreciation rules when underwriting acquisitions or refinances.
Impact on Property Valuations and Investment Returns
The bonus depreciation disconnect subtly affects property valuations and cap rate assumptions, particularly for value-add acquisitions where significant improvements are planned. A property acquired for $5 million with a planned $1 million renovation no longer delivers the same first-year tax shield benefit in Oregon. The spread of deductions over multiple years changes the effective after-tax cost of capital.
For investors modeling returns, this creates a small headwind in 2026 and a modest tailwind in years two through five or beyond. The aggregate economic impact depends on the improvement scale, the investor’s Oregon tax rate, and the property’s useful life. Large portfolios with continuous improvement cycles feel the effect most acutely.
Institutional investors evaluating Oregon properties should ensure their underwriting models incorporate the depreciation disconnect. Fee appraisers and valuation advisors in the Oregon market now routinely address this adjustment in reports addressing new construction or significant renovations.
Planning for Multi-State Operations
If you operate or own property in Oregon and other states, separate state returns and depreciation schedules are non-negotiable. Oregon’s add-back applies only to Oregon-situs property. Properties in Washington, California, or other states follow their own depreciation rules. A single consolidated depreciation schedule creates compliance risk.
Many tax software platforms and accounting systems allow state-specific depreciation configuration. Ensure your firm uses this functionality. Where it’s not available, manual schedules and supporting documentation are necessary to substantiate the add-back calculation on your Oregon return.
For commercial real estate transaction support, understanding multi-state tax implications is essential. Brokers and advisors guiding clients through acquisitions should raise the depreciation disconnect as a material tax consideration, particularly when the deal involves Oregon property and federal bonus depreciation planning.
The Long View: What Comes After 2026
Federal bonus depreciation phases down beginning in 2027 under current law, dropping to 80% and continuing to decline annually until it reaches zero in 2033. Oregon’s approach—disallowing the state-level benefit from 2026 onward—sets a different baseline. If federal rates decline further while Oregon maintains its disallowance, the gap widens.
Some states may follow Oregon’s lead. Others may maintain conformity or adopt different approaches. For now, Oregon stands as a notable outlier on this issue, and property owners need to plan accordingly.
Next Steps
Review your capital improvement timeline with your tax advisor or CPA. If you have projects planned for late 2025 or 2026, understand how the depreciation rules apply to each. Ensure depreciation schedules are prepared with Oregon-specific adjustments documented. When evaluating commercial property acquisitions or tenant representation in Oregon, factor the bonus depreciation disconnect into your financial model.
For detailed guidance tailored to your specific situation, consult with your tax professional or reach out to our team for transaction support. The rules are clear, but application depends on property type, acquisition date, and improvement scope. Proper planning now avoids surprises when returns are filed.
Have questions about Oregon tax planning or commercial property strategy? Our team at Portland CRE can help you navigate recent changes and optimize your approach to major projects. Contact our team today for a consultation on your specific situation.