Every state taxes investors differently. Here is how Oklahoma treats capital gains at the top rate, the marriage penalty, estate and inheritance tax at death, municipal-bond interest, the §1202 QSBS exclusion, and a harvested loss — a plain reference to the state's tax code.
Oklahoma taxes long-term gains at a top effective 4.75%; no state death tax; common-law step-up (only half of jointly-held property).
Income & gains4.75%
Loss treatment conforms to federal: capital losses net against gains and carry forward. Top effective long-term rate 4.75%. Quirk: 4.5% in 2026.
Summary of state law — primary-source citation in progress. State revenue departments, tax year 2025 — verify with a tax advisor.
Marriage~2x
Joint brackets widen for couples, but by less than 2× — a partial marriage penalty that bites on higher incomes.
Summary of state law — primary-source citation in progress. State income-tax filing schedules, tax year 2025 — verify with a tax advisor.
Death
No state estate or inheritance tax — only the federal estate tax applies.
Summary of state law — primary-source citation in progress. State estate/inheritance statutes, tax year 2025 — confirm with counsel.
Munisin-state
Only in-state municipal-bond interest escapes state tax; bonds from other states are taxed. The classic in-state muni preference that rewards a home-state ladder.
Summary of state law — primary-source citation in progress. State income-tax statutes on municipal-bond interest, tax year 2025 — verify with a tax advisor.
QSBS§1202 ok
Conforms to IRC §1202 — the federal qualified small business stock gain exclusion carries through to the state return.
Summary of state law — primary-source citation in progress. State IRC-conformity statutes on §1202, tax year 2025 — verify with a tax advisor.
Lossesfederal
Capital losses carry forward under the federal Section 1212 rules — a harvested loss nets against gains and rolls forward until used.
Summary of state law — primary-source citation in progress. State capital-loss carryforward rules, tax year 2025 — verify with a tax advisor.
Basis step-up
Common-law (separate-property) state: at the first spouse's death only the decedent's half of jointly-held property steps up; the survivor keeps carryover basis on their half (IRC 1014(b)(9), 2040(b)).
Summary of state law — primary-source citation in progress. State marital-property law / IRS Pub. 555; IRC 1014 — verify with counsel.
Frequently asked — 7 on Oklahoma
How are capital gains taxed in Oklahoma?
Loss treatment conforms to federal: capital losses net against gains and carry forward. Top effective long-term rate 4.75%. Quirk: 4.5% in 2026.
Does Oklahoma have a state estate or inheritance tax?
No state estate or inheritance tax — only the federal estate tax applies.
Is there a marriage penalty in Oklahoma?
Joint brackets widen for couples, but by less than 2× — a partial marriage penalty that bites on higher incomes.
How does Oklahoma tax municipal-bond interest?
Only in-state municipal-bond interest escapes state tax; bonds from other states are taxed. The classic in-state muni preference that rewards a home-state ladder.
Does Oklahoma follow the federal QSBS (§1202) exclusion?
Conforms to IRC §1202 — the federal qualified small business stock gain exclusion carries through to the state return.
What happens to a capital loss you carry forward in Oklahoma?
Capital losses carry forward under the federal Section 1212 rules — a harvested loss nets against gains and rolls forward until used.
How much is careful tax coordination worth in Oklahoma?
Coordinating how a portfolio is built and run against Oklahoma's rules is worth an estimated ~$40,000/yr for every $1M of taxable assets in our modeling — about +4.0%/yr after tax (a concentrated, naive book keeps ~1.9%/yr vs ~5.9%/yr tax-managed). Your actual figure depends on your holdings — the diagnostic computes it.
What careful tax management can change
Tax law is only half the picture. How a portfolio is
built and run — where each holding sits, how losses are used, how gains are timed — decides how
much of Oklahoma's tax code you actually pay. An illustrative estimate for a portfolio here:
~$40,000/yr per $1M taxable
Illustrative after-tax coordination opportunity in Oklahoma what running the portfolio against Oklahoma's rules can be worth — about +4.0%/yr modeled, as a tax-managed book keeps ~5.9%/yr after tax vs ~1.9%/yr for a concentrated, naive one; illustrative, over ~30 years, scales with the portfolio
How this is modeled: a single 30-year proxy-spliced path (1996–2026), comparing a
concentrated, high-turnover book with a tax-managed one — illustrative and coarse; treat it as
directional, not a precise figure.
Asset location
The bridge between how you invest and how the household is structured — placing the higher-turnover strategy in Roth and Traditional accounts, where its short-term gains escape tax entirely. Coordination itself; quantified for each household in the After-Tax Review.
Patient trading and lot selection
Holds positions through short-term noise and chooses which lots to sell, turning gains that would be taxed as ordinary income into long-term gains taxed roughly 17 points lower.
Loss harvesting
Realizes losses and applies them against the highest-taxed gains first — capturing a spread a simple buy-and-hold fund never reaches.
How to think about Oklahoma
Five lenses turn Oklahoma's tax environment into a household decision — the same lenses every state is read through, so any two states weigh on identical terms.
Rate pressure
The state takes 4.75% of every long-term gain at the top — moderate drag on what a realized return keeps.
Estate exposure
No state estate or inheritance tax — only the federal estate tax reaches the estate.
Harvesting leverage
A harvested loss is worth the 4.75% state rate it offsets, on top of federal — moderate harvesting leverage.
Mobility value
The rate is modest — residency is unlikely to be the lever that moves the household's outcome.
Basis coordination
Common-law basis: only the decedent's half steps up at the first death — plan titling so the survivor is not left with low-basis lots.
Coordination priorities for Oklahoma households
Loss harvesting· with your advisor + CPA
Setting a harvesting cadence that captures the state rate a banked loss offsets, sequenced against the state's loss-carryforward rules.
Asset location· with your advisor
Placing the high-turnover sleeve in tax-advantaged accounts so the state's rate falls on the least of the household's realized gains.
What should happen next
advisorSet the annual loss-harvesting cadence and confirm it clears the state's carryforward rules.
advisorLocate the high-turnover sleeve into tax-advantaged accounts and confirm the taxable book is the low-turnover core.
See the figure on your own Oklahoma portfolio.
The personalized diagnostic computes your after-tax, asset-location, and harvesting picture — by bracket and holdings.
State law reflects 2025 tax-year law; last reviewed 2026-07-07. Every classification is a summary of state law; where a primary-source citation has been verified, it is linked on the card.
What changed
2026-07-07 — First law-review date and honest per-cell source labeling; primary-source citations verified for Illinois, California, New York, Texas, and Florida (more in progress).
2025 — Washington's 7% (+2.9%) excise on long-term capital gains reflected (enacted 2022).
2025 — New Hampshire's Interest & Dividends tax reflected as fully repealed, effective 2025.
2025 — Illinois estate-tax detail tracks the pending SB 2970 as of the review date.
Illustrative / hypothetical — not a real track record and not advice. The tax-management impact figure is a hypothetical, after-tax result from the retroactive application of a tax-management model to ~30 years of proxy-spliced market data on a single illustrative path; no client capital was invested, and hypothetical performance does not guarantee future results. Intended for sophisticated investors; it may not be relevant to your situation, and your actual figure depends on your own holdings, basis, and bracket. State tax facts reflect tax year 2025 and can change — confirm with a tax advisor. Driftwood Wealth is a registered investment adviser; Form ADV and Form CRS are available at adviserinfo.sec.gov.
DRIFTWOOD WEALTH · AUSTIN, TEXAS · FOUNDED 2024MODEL DATA AS OF JULY 2026 · FORM ADV & CRS AT ADVISERINFO.SEC.GOV
Driftwood. State tax law reflects 2025 tax-year law; last reviewed 2026-07-07.