Federal estate tax exemption 2026: what Oklahoma owners miss

As of September 2026, the federal estate tax exemption sits at $15,000,000 per person, and the sentence we hear most often from Oklahoma business owners is some version of "so I don't have an estate tax problem." Sometimes that's right. Often it's a belief that hasn't been tested against the actual value of the company, the way the exemption works for a married couple, or what happens to a business when the owner dies without the pieces in place. This piece takes the common beliefs about the federal estate tax exemption in 2026 one at a time and sorts the accurate ones from the ones that get owners in trouble.

Belief one: the exemption is $15 million and it's permanent now

Mostly accurate, with one caveat. Public Law 119-21 was signed on July 4, 2025. The IRS describes it as amending the basic exclusion amount provision to set the figure at $15,000,000 for calendar year 2026, up from $13,990,000 in 2025. The statute as it now reads states the basic exclusion amount as $15,000,000, provides for cost-of-living adjustments for years after 2026 using calendar year 2025 as the base, and applies to estates of decedents dying and gifts made after December 31, 2025.

The caveat is the word "permanent." The current text has no scheduled expiration, which is a real change from the prior structure. Nothing, though, stops a future Congress from amending it again, and estate planning for a business owner is a decision made over decades. We treat the $15,000,000 figure as the law today and plan for the possibility that it won't be the law when the plan matters.

Two figures that go with it. The annual gift exclusion per donee is $19,000 for both 2025 and 2026, so gifts under that amount to any one person don't consume exemption at all. And the top estate tax rate in the rate schedule is 40 percent of the taxable amount over $1,000,000, which is the rate that applies to nearly any estate large enough to owe tax after the exemption.

Belief two: Oklahoma has its own estate tax on top

Inaccurate. The Oklahoma Tax Commission's annual report states plainly that, effective for deaths on or after January 1, 2010, the Oklahoma estate tax is repealed, and the estate tax line in the state's collections has read zero ever since. An Oklahoma resident's estate deals with one estate tax, the federal one.

That's genuinely good news, and it's also the reason Oklahoma owners under-plan. In states with their own estate taxes at much lower thresholds, owners are forced to confront the question early. Here, an owner with a company worth $6,000,000 and a house and some land can go decades without anyone raising it, and by the time the business has doubled twice, the federal number is in play and the easy planning windows have closed.

One state-level item does survive. Oklahoma requires resident estates and trusts to file a fiduciary income tax return each taxable year, reporting taxable income with Oklahoma adjustments. That's income tax on what the estate earns while it's open, not a tax on the transfer, but it's a filing the executor of a business owner's estate has to handle alongside the company's returns.

Belief three: married means $30 million, automatically

Half right, and the wrong half is expensive. Each spouse has their own $15,000,000 exemption. The mechanism that lets a surviving spouse use the deceased spouse's unused amount is portability, and portability isn't automatic. The statute conditions it on the executor of the first spouse's estate filing an estate tax return, computing the unused exclusion, and making the election on that return. The IRS describes the election as made on a timely filed Form 706, and the statute says the election is irrevocable and unavailable if the return is filed late.

Here's the practitioner's wrinkle. Form 706 is due nine months after death, with an available six-month extension. When the first spouse dies with an estate well under the threshold, nobody thinks a federal estate tax return is required, because in the ordinary sense it isn't. The IRS's own guidance says a return is required if the estate elects to transfer unused exclusion to the surviving spouse regardless of the size of the gross estate. If no one files, the deceased spouse's exemption is gone, and the survivor is back to one exemption against an estate that now holds everything. For a couple whose main asset is a growing company, that single missed filing can be the difference between no estate tax and a seven-figure bill.

The rule that's sometimes overlooked in the other direction: the IRS notes that simplified valuation provisions apply for estates that have no filing requirement except for the portability election. The return is real work, but it isn't a full appraisal exercise for every asset.

Belief four: my company isn't worth anywhere near that

Frequently wrong, and here is where the estate question turns into a business question. Owners value their company by what they'd take for it in a hurry. An estate is valued at fair market value on the date of death, which for a profitable closely held business is a number produced by an appraiser applying earnings multiples, asset values, and adjustments the owner has never seen.

Three things push the number up: real estate the company or its affiliates own; life insurance on the owner if the owner holds the policy; and retained earnings that were never distributed. Add a personal residence, retirement accounts, and land, and an owner who "isn't anywhere near" the exemption is often closer than they think. The discount arguments for lack of control and lack of marketability cut the other way, and they're legitimate, but they're arguments an appraiser and the IRS may settle differently.

The reason this matters more for a business owner than for an owner of a portfolio is liquidity. An estate that owes tax on a company has to pay in cash, and the company is not cash.

Belief five: if there's tax, the estate just pays it

True in the sense that the tax gets paid. What owners miss is where the money comes from. An estate composed mostly of a closely held business can be forced to sell the business, borrow against it, or distribute it in a way that damages the very continuity the owner spent a career building.

The Code offers one structural relief. Under IRC §6166, if the value of an interest in a closely held business exceeds 35 percent of the adjusted gross estate, the executor may elect to pay part or all of the estate tax in as many as ten equal installments, and the first installment can be deferred to a date up to five years after the tax would otherwise be due. That's deferral, not forgiveness; interest runs, and the election has conditions that have to be met at death and maintained afterward. It's a tool for an estate that has planned to use it, not a rescue for one that hasn't.

Other liquidity tools sit outside the Code: life insurance held in a structure that keeps it out of the estate, a funded buy-sell agreement that creates a buyer and a price at death, and an operating agreement that lets the company make the distributions the estate needs. Each of those has to be in place before death to work.

What the 2026 federal estate tax exemption changes about succession planning

Our honest assessment is that the higher exemption takes federal estate tax off the table for many Oklahoma family businesses, and that's a real simplification. It changes the planning emphasis rather than eliminating the need to plan.

For estates comfortably under $15 million

Here the estate tax question recedes and the income tax question moves forward. Assets held at death receive a basis adjustment to fair market value, which means an owner who was gifting company interests during life to reduce a future estate tax may now be giving away the basis step-up for no estate tax benefit. Some of the aggressive lifetime-transfer planning that made sense under lower exemptions now works against the family. The plan should be revisited with that in mind, not left running on the old logic.

For couples between $15 million and $30 million

Portability is the entire plan, and it depends on a timely Form 706 at the first death. The mechanics of who is executor, who knows the filing is required, and whether the company's books can support a valuation within fifteen months are questions to answer now, because at the first death everyone involved is grieving and the deadline is running.

For estates above the exemption

The federal tax is real, at 40 percent on the excess, and the analysis returns to lifetime transfers, valuation discounts, insurance, and §6166 eligibility. The $15,000,000 exemption also means a larger amount can be moved during life without tax, which makes this a favorable environment for owners who have decided to transfer the company to the next generation anyway.

The order things actually happen in

1. Know the number. A defensible estimate of what the estate would be worth today, with the business valued the way an appraiser would value it, is the first document. Most owners have never seen one.
2. Match the entity documents to the estate plan. Transfer restrictions in an operating agreement or shareholder agreement can block the transfer a will or trust directs, and a buy-sell agreement's valuation clause sets a price the estate may be stuck with.
3. Decide what happens at the first death. Who files Form 706, whether portability is elected, and how the surviving spouse holds the company.
4. Solve liquidity before you need it. Insurance, a funded buy-sell agreement, or a §6166 posture are choices, and each has a cost that's easier to carry while the owner is alive.
5. Revisit when the law or the value changes. The 2025 legislation reset the exemption; the next change could move it in either direction.

A counter-consideration owners deserve to hear is that estate planning costs money and time now for a benefit that arrives after they're gone, and for a business worth a fraction of the exemption the right answer may be a simple plan focused on continuity rather than tax. The mistake isn't choosing the simple plan. It's assuming a large exemption means no plan at all.

When a company's value has grown past what the owner last assumed, or a spouse has died and no one is sure whether an estate tax return was needed, that's the point at which we'd want to talk. Reach our Oklahoma City office or use the contact page; sorting out the succession picture while the choices are still open is almost always cheaper than sorting it out afterward.

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.