Oklahoma §168(k) Conformity 2026: What STR Investors Need to Know

Modeled on a $150,000 federal §168(k) deduction. Compare in the state conformity tool →

How Oklahoma Adopts §168(k) — Rolling vs Static Conformity

Oklahoma's individual income tax base is defined under 68 O.S. §2353, which begins with federal adjusted gross income and applies specified state adjustments. For depreciation purposes, Oklahoma uses rolling conformity — federal amendments to IRC §168 flow through automatically without waiting for follow-on state legislation.

This is the design that lets Oklahoma pick up OBBBA's restoration of 100% §168(k) immediately. Static-conformity states (California, Virginia, Wisconsin, Georgia, Kentucky, and others) have to pass legislation to update their IRC reference date — and several of them still explicitly exclude §168(k) even after conformity updates.

For an Oklahoma STR investor, this means the state and federal depreciation schedules match. No parallel books, no basis divergence to reconcile at disposition, no annual addition/subtraction modification on the state return.

Worked Example — $150K Federal Deduction + Extra State Savings

Take a $1.1M STR in Broken Bow, Grand Lake, or the Oklahoma City metro. A cost segregation analysis identifies $150,000 of 5-year and 15-year property eligible for §168(k). The math:

• Federal Year-1 deduction: $150,000 × 37% marginal bracket = $55,500 federal tax savings.
• Oklahoma Year-1 deduction: Same $150,000 on the state return. At the 4.5% top marginal rate = $6,750 additional state tax savings.
• Total Year-1 tax benefit: $62,250.

The Oklahoma layer adds roughly 4.5 cents of tax savings for every dollar of §168(k) deduction — modest, but always additive. Compare to a decoupled state where the state layer is subtractive: an Arkansas investor at 3.9% loses ~$5,850 in Year-1 state savings on the same $150K, meaning the Oklahoma investor is ~$12,600 ahead on the state line alone.

The Statute Explained

The controlling authority is 68 O.S. §2353, which defines Oklahoma taxable income by reference to federal AGI as computed under the Internal Revenue Code. Because Oklahoma applies rolling conformity for depreciation — with no §168(k)-specific carveout — federal bonus depreciation as restored by OBBBA is operative for Oklahoma purposes on the same effective date.

OBBBA restored 100% §168(k) bonus depreciation permanently, meaning full first-year expensing of qualified 5-year, 7-year, 15-year, and 20-year property acquired and placed in service after January 19, 2025.

How Oklahoma Compares to Decoupled States

Oklahoma's full-conformer position is a meaningful tailwind, especially set against the country's most aggressive decouplers:

• California — 100% add-back at 13.3%: ~$19,950 Year-1 miss on a $150K deduction.
• New York — 100% add-back at 10.9%: ~$16,350 Year-1 miss (before NYC city surtax).
• Arkansas — 100% add-back at 3.9%: ~$5,850 Year-1 miss on the same deduction.

Decoupled-state investors recover the deduction eventually, but they trade Year-1 cash for years of deferred timing and a permanent basis-tracking obligation on the state return. Oklahoma removes both frictions.

What This Means for Your STR Purchase Decision

Because Oklahoma conforms cleanly, the state return does not distort the pre-purchase math — the federal §168(k) deduction and the additional ~$6,750 of state savings both land in Year 1. Your deal underwriting can use the same depreciation figures for federal, state, and cash-on-cash projections.

The size of the deduction still depends on the property itself: land ratio, age, price-per-square-foot, and amenity signals all drive how much of your basis qualifies for §168(k) treatment. To model both federal and Oklahoma state Year-1 tax math on a specific listing, run the address on your property before you make an offer.

For a side-by-side view of Oklahoma against any other state at any federal deduction amount, use the state conformity tool.

Frequently Asked Questions