Oklahoma does not have a capital gains tax of its own. A gain is part of your federal adjusted gross income and is taxed with everything else at the state income tax rates. What makes Oklahoma unusual is the other side: the state lets individuals subtract certain gains through the Oklahoma capital gain deduction, claimed on Form 561 (residents) or Form 561-NR (part-year residents and nonresidents). Whether you get it depends on what you sold, where it was located and how long you owned it.
This guide uses the enrolled text of House Bill 2764 (2025) for the 2026 rate schedule, the Oklahoma Tax Commission's 2026 Forms 511, 561 and 561-NR as posted for software developers, and two IRS pages, all read on 3 November 2026. We did not read the Oklahoma Statutes site itself (68 O.S. Section 2358, which the forms cite), so the deduction rules below are stated as the Commission's forms state them.
The enrolled text of HB 2764 sets the individual income tax schedule for tax year 2026. For single filers and married individuals filing separately it is 0% on the first $3,750 of taxable income, 2.5% on the next $1,150, 3.5% on the next $2,300 and 4.5% on the remainder. For married couples filing jointly, surviving spouses and heads of household it is 0% on the first $7,500, 2.5% on the next $2,300, 3.5% on the next $4,600 and 4.5% on the remainder. The text also says no deduction for federal income taxes paid is allowed in arriving at taxable income.
| Filing status | 0% | 2.5% | 3.5% | 4.5% |
|---|---|---|---|---|
| Single or married filing separately | to $3,750 | to $4,900 | to $7,200 | above $7,200 |
| Joint, surviving spouse, head of household | to $7,500 | to $9,800 | to $14,400 | above $14,400 |
The upper limits in the table are our own addition of the bracket widths. Because the top bracket starts at a low level of taxable income, almost every gain is taxed at 4.5% at the margin.
For comparison, the same bill shows a 4.75% top rate for the earlier schedule that applied to tax years 2024 and 2025.
HB 2764 (signed by the Governor on 28 May 2025, effective 1 November 2025) also contains a trigger. If the State Board of Equalization certifies that revenue growth passes the statutory threshold, every rate in the schedule falls by 0.25 of a percentage point, repeating with each successful certification until a rate reaches zero. The bill sets the first preliminary certification for the Board's December 2026 meeting, with a final determination at its February meeting, and says a reduction takes effect on January 1 following the final February certification. It also requires that the Board certify, in December 2026, that early fiscal-year 2027 revenue was within 95% of the February 2026 estimate with no revenue failure declared, and a revenue failure declaration can delay a reduction. On our reading of that timetable, the earliest possible cut would apply from 1 January 2028, not for a 2027 sale. We did not find an official certification of a trigger in the sources we read, so this guide uses the 4.5% schedule. Check the Oklahoma Tax Commission before relying on a rate for a later year.
The resident return, Form 511, starts at line 1 with federal adjusted gross income from your federal Form 1040. A capital gain reported federally is therefore already in that figure. Federal rules decide whether a gain is short-term or long-term: the IRS says that if you hold an asset for more than one year it is long-term, and that net short-term capital gains are taxed as ordinary income at graduated rates. The Oklahoma rates above apply to the resulting taxable income whichever type of gain it was; we found no Oklahoma rate that differs by holding period.
From federal adjusted gross income you subtract items on Schedule 511-A and add items on Schedule 511-B, then take the Oklahoma standard deduction or itemized deductions and exemptions. The 2026 Form 511 shows standard deductions of $6,350 for single or married filing separately, $12,700 for married filing jointly or a qualifying surviving spouse and $9,350 for head of household, and exemptions of $1,000 each. The capital gain deduction is line 12 of Schedule 511-A, which tells filers to provide Form 561.
The Commission's Form 561 instructions say individual taxpayers can deduct qualifying gains receiving capital gain treatment that are included in federal adjusted gross income, meaning net capital gains as defined in Internal Revenue Code Section 1222(11). The form cites 68 Oklahoma Statutes Section 2358 and Rule 710:50-15-48. The gain must come from one of three kinds of sale:
For the stock and business categories, an Oklahoma company is one whose primary headquarters has been located in Oklahoma for at least three uninterrupted years before the sale.
The deduction cannot exceed the Oklahoma net capital gain included in federal adjusted gross income. On Form 561 it is the smaller of line 8 (qualifying Oklahoma net capital gain after the loss carryover) and line 9 (the Oklahoma net capital gain in federal adjusted gross income), carried to Schedule 511-A, line 12. Installment-sale gains can qualify if the holding period was met on the date of sale, using the taxable portion of the payment received that year. A gain passed through a partnership, S corporation, trust or estate can qualify only if you were a member of the entity for the full two or five years and the entity held the asset for that long; the entity must give you supplemental information identifying the qualifying gain.
A bill that would change the deduction was pending when we checked: Senate Bill 48 (2025), which as introduced would eliminate the Oklahoma-source capital gain deduction from tax year 2026 (Oklahoma Tax Commission revenue impact statement, 10 February 2025). The Legislature's bill page showed it amended and still waiting on third reading in the Senate, with no House action and no governor action, so it is not law and the deduction above applies. Check the Legislature's bill page for later action.
Gains that do not fit these categories are not deductible under Form 561 as we read it: for example, stock in a company headquartered elsewhere, or Oklahoma land held for less than five years, remain taxable.
This example is our own arithmetic using the 2026 schedule for a single filer with one exemption. It uses the rate formula, not the Commission's printed tax table, so a real return can differ by a small amount.
Suppose a single resident has $60,000 of wages and sells Oklahoma rental land owned for more than five years, for a $50,000 gain. Federal adjusted gross income is $110,000. After the $6,350 standard deduction and one $1,000 exemption, taxable income is $102,650 without the capital gain deduction, giving tax of $4,404.50. If the whole gain qualifies and is deducted, taxable income is $52,650 and tax is $2,154.50. The deduction saves $2,250, which is 4.5% of the gain.
If the same gain does not qualify (for example the land was held for four years), the gain costs $2,250 of Oklahoma tax, because every dollar of it falls in the 4.5% bracket. At 4.5%, a $10,000 gain costs $450 and a $100,000 gain costs $4,500.
Oklahoma starts from federal adjusted gross income, so the federal treatment of losses carries into the state return. Form 561 has a separate line for a qualifying Oklahoma capital loss carryover from the prior year, which reduces the current-year qualifying gain, and says a capital loss carryover from qualified property reduces the current-year gains from eligible property. Schedule 511-B, line 2 asks residents to add back out-of-state losses as a positive number. We did not read the rules on how much net loss can offset other income, so ask the Commission or a preparer about a net loss year.
Residents file Form 511 and claim the deduction on Form 561. Part-year residents and nonresidents file Form 511-NR and use Form 561-NR, whose title is Oklahoma Capital Gain Deduction for Part-Year and Nonresidents Filing Form 511-NR. On that form, Column G takes the qualifying Oklahoma capital gains and losses that were sourced to Oklahoma on Form 511-NR, Schedule 511-NR-1, line 7, so a nonresident can claim the deduction only for gains Oklahoma already treats as Oklahoma-source.
Residents with out-of-state income prorate their deductions and exemptions on a separate schedule (Form 511, line 4), and Form 511 line 16 provides a credit for taxes paid to another state, claimed with Form 511-TX. The Form 561 worksheet notes that, generally, the sale of an intangible such as stock is not considered out-of-state; it also says gains on US Government and municipal bonds, which are exempt from Oklahoma tax, go on the out-of-state lines. We did not read the Commission's sourcing rules for nonresidents in full, so confirm how a particular sale is sourced.
The IRS says you may qualify to exclude up to $250,000 of gain on the sale of your main home from your income, or up to $500,000 if you file a joint return with your spouse. Oklahoma starts from federal adjusted gross income, so gain excluded federally is not in that starting figure; the Commission's pages we read do not discuss this point, so that is our reading. Any gain above the federal exclusion is taxed like other gains, and an Oklahoma home owned for five uninterrupted years is real property within the first category of the capital gain deduction. We have not read a rule that says a main home is excluded from that category, but confirm with the Commission before relying on it for a large sale.
The Commission forms are the versions posted for software developers, not the final printed packet.