What’s new in Oklahoma for 2026: the 4.5% rate, the trigger that did not fire, and the federal breaks that stop at the state line

Three things are new for 2026 and one thing is not. The top rate falls from 4.75% to 4.5%, and the three lowest brackets become a single 0% bracket on the first $3,750 of taxable income single, $7,500 joint. The law that did this also set up an annual revenue test that can cut the rate another quarter point; the first test, in December 2025, came up about $1 billion short, so 4.5% holds for 2027 as well. And the federal deductions for tips, overtime, seniors and car-loan interest, the ones that dominated the 2025 federal news, do nothing on the Oklahoma return, because Oklahoma starts from federal adjusted gross income and every one of them is taken after that line. What has not changed is everything else: the $6,350 and $12,700 standard deductions, the $1,000 exemptions, the $10,000 retirement exclusion, the $17,000 itemized cap, and every income limit on every credit. None of them is indexed, and none moved.

The rate cut, in dollars

House Bill 2764, signed May 28, 2025, took effect with tax year 2026. The Department’s 2026 Form 511 instructions put it in one sentence: the top individual income tax rate decreased to 4.5%, and the tax tables have been revised. Under the old schedule the rate climbed through six steps, 0.25%, 0.75%, 1.75%, 2.75%, 3.75% and 4.75%. Under the new one it is 0%, 2.5%, 3.5% and 4.5%, and the top rate still begins at $7,200 of Oklahoma taxable income for a single filer and $14,400 on a joint or head-of-household return.

Cut points are taken from the Department’s 2026 withholding tables less the standard deduction they build in; they match the 2025 bracket lines. The final 2026 tax table should be checked when it is published.

The lower brackets are worth very little. All the tax below the 4.5% line adds up to $109.25 for a single filer and $218.50 on a joint return, against $324 and $648 if the whole range were taxed at 4.5%. So the practical rule for 2026 is that Oklahoma takes 4.5% of taxable income, less about $215 single or $430 joint. For a married couple with $58,900 of taxable income above the joint threshold, the quarter-point cut alone is worth $147, and the folding of the three bottom brackets into a 0% bracket adds roughly $90 more.

The trigger, and why the rate is still 4.5% for 2027

The part of HB 2764 that drew the headlines was not the cut but the mechanism for more cuts. Every December the State Board of Equalization compares total state collections for the most recent fiscal year with the highest prior year. If collections beat that peak by at least 125% of what a quarter-point rate cut would cost, the top rate drops another 0.25 point, taking effect two tax years later. The test repeats each year, and the cuts could in principle continue until the income tax is gone. If a revenue failure is declared before a scheduled cut takes effect, the cut is cancelled.

The first test was December 22, 2025. Fiscal 2025 collections were $13.54 billion; the peak year, fiscal 2023, was $14.18 billion; the threshold to clear was $340 million above the peak. The Board found the state about $1 billion short, so no cut was certified. The rate for 2027 is 4.5%, the same as 2026. The next test is December 2026, and under the two-year lag a cut certified then would reach tax year 2028. Readers who have heard that Oklahoma is eliminating its income tax should hear the plainer version: the rate is 4.5% this year and next, and the trigger has not fired.

The 2025 federal law: what reaches Form 511

Oklahoma adopts the Internal Revenue Code as amended, and Oklahoma adjusted gross income is federal adjusted gross income, Form 1040 line 11 carried to Form 511 line 1. That one design choice sorts the entire 2025 federal law into two piles.

Nothing has to be added back for the below-the-line items. The income simply never left Oklahoma AGI.

No Oklahoma bill matching the tip, overtime, senior or car-loan deductions became law in 2026. House Bill 3377, which would have created an Oklahoma tip deduction of up to $25,000 beginning in 2027, was referred to committee and did not advance (verify). The Department’s 2026 instructions do not mention the federal law at all, which is itself the answer: there is nothing to say.

What else changed

Parental Choice Tax Credit cap. House Bill 3705 (2026) raised the statewide cap on the private-school tuition credit from $250 million to $275 million beginning with fiscal 2027, which starts July 1, 2026. The per-student amounts are unchanged: $7,500 at federal AGI up to $75,000, stepping down to $5,000 above $250,000. The credit is applied for through the Tax Commission in a spring window and paid by check made out to the taxpayer and sent to the school; it is not a line on Form 511. The homeschool version, up to $1,000 of expenses per student, is claimed on Form 591-D and Form 511 line 29. See Oklahoma for families.

New credits and a reorganized Form 511-CR. The 2026 instructions list three new credits: the Firefighter Cancer Screening Credit, the Credit for Qualified Civil Engineering Employees and Employers (Forms 593 and 594), and the Credit for a Faculty Preceptor. Form 511-CR is split into Part 1 and Part 2, and Part 2 credits are subject to an annual statewide cap. Few households will meet these; the civil engineering credit is the one most likely to show up on a wage earner’s return.

Venture capital deduction. House Bill 4028 (2026) added Schedule 511-A line A16, a deduction for cash invested in an eligible Oklahoma venture capital company, up to $25 million per investor, for tax years 2022 through 2031 (verify). It is a specialist item.

New refund check-offs. Schedule 511-H adds donations to the Veterans Affairs Capital Improvement Program, regional food banks and the Indigent Veteran Burial Program (verify).

Nothing else moved. The standard deduction ($6,350 single and married filing separately, $9,350 head of household, $12,700 joint and qualifying surviving spouse), the $1,000 exemption, the $10,000 retirement exclusion, the $17,000 itemized cap, the $100,000 AGI limit on the child credit, the $20,000 and $50,000 limits on the Sales Tax Relief Credit, and the $15,000 and $25,000 limits on the extra exemption at 65 are all the same as 2025. Oklahoma indexes nothing, so every year that passes with no bill makes each of these a little smaller in real terms.

State Question 847: rejected

There was no income tax measure on the November 3, 2026 ballot. State Question 847, a legislative referral about property tax, was rejected, 54.27% to 45.73%. It would have lowered the annual cap on growth in a property’s taxable value from 3% to 1.75% for homestead and agricultural property and from 5% to 4% for other property, beginning in 2027. It would also have given homeowners 65 and older whose income is above the existing senior valuation freeze limit a tiered cap, from 0.35% a year at just over the county median income up to 1.75% at more than 180% of it. With its defeat the 3% and 5% caps and the existing senior valuation freeze continue unchanged, and nothing changes on the 2026 income tax return. The count is unofficial until certified.

Still true, and still asked about

The state sales tax on groceries ended August 29, 2024. Cities and counties still tax groceries, so the register total did not go to zero; the 4.5% state share did. There is no 2026 change. Oklahoma has no local income or wage tax anywhere in the state, and no estate or inheritance tax.