New Oklahoma tax laws for 2026: what passed, and when each takes effect

As of mid-July 2026, the Oklahoma Legislature's 2026 regular session is over, the governor has acted on the bills, and the Oklahoma Tax Commission's Tax Policy Division has published its summary of what passed. It's an abbreviated list by the OTC's own description, but it's the primary record of the new Oklahoma tax laws for 2026, and it's what we worked from here.

What strikes us about this year's crop isn't a headline rate. The income tax rate cut to 4.5% and the collapse to three brackets came out of last year's session and already govern tax year 2026. This year's changes are narrower and more operational: a sales tax exemption that reaches contractors, two new pieces of property-tax procedure, a batch of credit extensions, and a savings fund built to justify future rate cuts. They take effect on a series of dates between May 2026 and January 2027, and we've organized this piece the way we'd brief a client: by when each one starts to matter.

Already in force: what changed in May and July

The automatic gas tax increase is gone (HB 1370, May 18, 2026)

Oklahoma had a statute that automatically raised the state excise tax on gasoline and diesel if the federal fuel tax were reduced. HB 1370 repealed it, effective May 18, 2026. The governor's office described the provision as an antiquated trigger and noted the Legislature moved on it within a day. For a fleet operator or fuel distributor the practical effect is simple: a federal fuel tax holiday, if one ever happens, would pass through to Oklahoma pumps rather than being absorbed by a state increase.

Petroleum excise tax rates extended (SB 1280, July 1, 2026)

The current oil and gas petroleum excise tax rate, its apportionment structure, and its termination dates were set to expire in 2026. SB 1280 extends them to 2031. Operators budgeting on the assumption the rate would step down should revise the model. Alongside it, SB 1309 (also July 1) raises the annual ROADS fund allocation to the Department of Transportation from $80 million to $100 million by reallocating existing dollars, which the OTC notes changes no total apportionment or funding level.

Veterans refund checkoff (SB 1832, July 1, 2026)

SB 1832 reauthorizes the income tax refund donation options for the Department of Veterans Affairs indigent veteran burial program and its equipment and capital improvement program, beginning with tax year 2026. HB 3044 does related work on a November 1 effective date. Minor for a business owner, but the kind of line item that shows up on 2026 returns.

August 13, 2026: the money bills

The Taxpayer Endowment Trust Fund (HB 4072)

This is the one with the political headline. HB 4072 creates the Oklahoma Taxpayer Endowment Trust Fund and directs future excess gross production and corporate income tax revenue 75% to the Revenue Stabilization Fund and 25% to the new trust. The governor's office described a $200 million initial investment from existing state savings, a lock-up period to protect principal, and an intent that limited earnings eventually flow to the General Revenue Fund.

What it isn't: a rate cut. Nothing in HB 4072 changes anyone's 2026 or 2027 tax bill. The mechanism that actually lowers rates is the revenue trigger already in last year's income tax law, which cuts the rate by a quarter point when certified collections clear a benchmark. The endowment is an attempt to make that trigger fire more often and more safely. Owners planning entity or compensation structures around a zero-income-tax Oklahoma should treat it as a direction of travel, not a date.

Credit caps and incentive expansions

• HB 3705 raises the Parental Choice Tax Credit annual cap from $250 million to $275 million for fiscal year 2027.
• HB 2894 sets two separate $15 million annual credit limits under the Oklahoma Rural Jobs Act, one for approvals before the effective date and one for approvals after it. Investors with pending applications should ask which bucket theirs falls in.
• HB 4191 expands the Small Employer Quality Jobs Incentive Act's definition of basic industry to include motion picture, video, sound recording, and child daycare NAICS codes. If you operate a daycare business or a production company with payroll growth, this incentive may now be open to you when it wasn't in 2025.
• HB 4036 moves $5 million from the Filmed in Oklahoma fund to a sitcom pilot program. A reallocation, not a new credit.

November 1, 2026: the changes with a compliance step

November 1 is the default effective date for Oklahoma legislation, and it's where most of the business-facing changes land.

Sales tax exemption for contractors working for exempt entities (SB 44)

This is the change we'd flag first for any construction, mechanical, or trades business. A contractor building for an exempt entity is the one buying the materials, so whether the exemption reaches the contractor's own purchases has always been the practical question. SB 44 answers it: the bill exempts tangible personal property and services sold to contractors and subcontractors performing work for exempt entities.

The conditions matter as much as the exemption. The contractor has to provide the vendor an exemption certificate along with contractual proof of the exempt project, and the vendor must retain that documentation. In audit terms, that's a new paper trail with three parties on it: the exempt entity, the contractor, and every supplier. A general contractor will want a written procedure for handing subcontractors the certificate and the contract excerpt before the first material order after November 1, because a supplier with no documentation will have collected tax on a purchase the contractor thought was exempt, and the refund route runs through the supplier.

The government-side counterweight is that a broadly drafted exemption for contractors invites misuse, and the documentation requirement is how the OTC keeps it in bounds. Expect exemption-certificate review on construction accounts to increase after the effective date.

Two property-tax procedure bills (SB 1579 and SB 2018)

SB 1579 requires county assessors to include a taxpayer bill of rights, in prescribed language, with valuation increase notices. On its face it's a disclosure bill. In practice, the notice that arrives next spring will now tell owners about their protest rights on the notice itself, which we expect to increase the number of informal and formal valuation protests filed with county boards.

SB 2018 defines residential rental housing as a development with at least 20 rental units, excluding properties financed with the federal low-income housing tax credit, and requires that such property be valued under the cost approach for two years after construction or until it's conveyed to an unrelated third party. For multifamily developers that's a temporary and predictable valuation method during lease-up, in place of an income approach on a half-empty building. For buyers, the conveyance to an unrelated party ends the cost-approach period, which is a diligence item on any acquisition of a new project.

Credits extended or modified

• HB 4426 extends the Strategic Industrial Development Enhancement (SIDE) credit's sunset from December 31, 2027 to December 31, 2032. SB 1992 pairs with it by defining a strategic finance partner and requiring Department of Commerce approval before the credit is assigned, without changing rates or caps. If your SIDE credit was being sold or transferred, the approval step is new.
• HB 3704 creates an Oklahoma credit that piggybacks on a federal scholarship-granting-organization credit: 50% of the donation, capped at $1,000 per taxpayer, $2,000 for joint filers, and $100,000 for a business entity, with the federal credit reduced by the Oklahoma amount. The OTC is directed to coordinate the two.
• HB 4118 expands the Caring for Caregivers credit: the AGI threshold rises to $75,000 ($150,000 joint), the minimum age for the family member is removed, medical mileage is added, and the maximum credit rises to $3,000 per eligible family member.
• HB 1427 lets the clean-burning motor vehicle fuel property credit be used against the bank privilege tax.
• HB 3661 removes the January 2027 sunset from the sales tax exemption for commercial forestry service equipment.
• HB 3465 pushes the Emission Reduction Technology Rebate sunset from July 1, 2027 to July 1, 2029.

Excise and miscellaneous

SB 680 expands the definition of a cigarette to include products intended to be heated or burned and sets a 50% tax exemption for heat-not-burn products. HB 3501 lets the ABLE Commission issue multiple licenses for one location if the applicant is in good standing with both ABLE and the OTC, one more place where an unpaid tax balance quietly blocks a license. SB 1390 extends the apportionment of oil gross production tax revenue among several state funds through fiscal 2032. And HB 3075, the Oklahoma Common Cents Act, will require political subdivisions to round cash transactions starting July 1, 2027; the OTC's summary notes rounding doesn't apply to tax calculations.

January 1, 2027: plan for these now

• SB 227 expands the ad valorem exemption for oil and gas property taxed in lieu through gross production tax to include flowlines and gathering lines from the wellhead to the first sales meter or production unit boundary, and all commercial disposal systems essential to production. Operators listing equipment on 2027 renditions should map which assets move under the exemption.
• SB 1122 sets a 15% assessment ratio for a new broadband service provider subclass.
• HB 3986 removes the completion-date requirement for the recycled-water gross production tax exemption, so a qualifying well no longer has to have started production on or after July 1, 2022.
• HB 4432 exempts federally deductible wagering losses from Oklahoma's $17,000 itemized deduction cap for tax year 2027.
• HB 4028 extends the deduction for qualified equity investments in an Oklahoma venture capital company through tax year 2031, keeping the $25 million annual deduction available to accredited investors.
• HB 3590 changes student eligibility thresholds under the scholarship-granting-organization credit.
• SB 1400 reorganizes the aircraft sales tax exemptions without, per the OTC, changing their substance.

Not law yet: the two property-tax state questions

Two of the items on the OTC's list are proposed constitutional amendments the Legislature referred to the voters. Neither is law unless approved at the ballot, and we treat both as proposals.

SJR 39 (State Question 847) would lower the annual cap on growth in fair cash value beginning in tax year 2027: from 3% to 1.75% for homestead and agricultural property, and from 5% to 4% for other locally assessed real property, with graduated limits for senior homesteads tied to county median income. For a commercial landlord the 5% cap is the one that matters, and a cut to 4% would compound over a holding period.

HJR 1087 (State Question 844) would change the constitutional requirement that the Legislature reimburse local taxing jurisdictions for revenue lost to the manufacturing ad valorem exemption, replacing it with a directive to set reimbursement levels and methods by statute. Manufacturers holding the five-year exemption should watch it, because the reimbursement mechanism is what keeps local governments from resisting the exemption.

The new Oklahoma tax laws as a whole: how we read the session

The taxpayer-favorable list is long and mostly incremental: an exemption for contractors, extended credits, procedural rights on valuation notices, and a savings fund pointed at future rate cuts. The state-favorable side is quieter but real. The petroleum excise rate that was scheduled to lapse now runs to 2031. Every new exemption arrives with a documentation condition. And the endowment fund is designed so rate cuts happen only when collections prove they can be afforded.

The practitioner's edge is in the effective dates. A contractor who starts claiming the SB 44 exemption on an October invoice has a problem; one who waits until November 1 and skips the certificate has a different problem. A SIDE credit assigned before November 1 doesn't need Commerce approval; one assigned after does. And a multifamily project sold to an unrelated buyer in December 2026 leaves the cost-approach valuation period even though the statute is brand new. The calendar is the compliance step.

If one of these changes touches your business, whether it's a construction contract, a credit you're counting on, or a valuation notice you'd like to protest, it's worth a conversation before the effective date rather than after. Our team can be reached through the contact page or the Oklahoma City office. A short conversation early is almost always cheaper than a problem later.

This article is general information about Oklahoma, Texas, and federal law, not legal advice, and it does not create an attorney-client relationship. Facts matter; talk to a lawyer about yours.