Does Oregon Have an Estate Tax? Who Owes and How Much

Yes, Oregon has an estate tax, and its $1 million filing threshold is one of the lowest in the country. Rates run from 10% to 16% on the portion of the taxable estate above $1 million, and because the federal exemption sits at $15 million for 2026, plenty of Oregon families owe state estate tax while owing nothing to the IRS.¹

Who Has to File

An estate must file an Oregon estate tax return if the decedent’s gross estate was worth $1 million or more at death.¹ That threshold hasn’t changed in over two decades and isn’t adjusted for inflation, so rising property values pull more estates in every year.

The gross estate includes real estate, bank accounts, investment portfolios, retirement accounts, and certain life insurance proceeds. Oregon follows the federal definition under Internal Revenue Code Section 2031 for determining what’s inside the gross estate.² Filing is required at $1 million, but owing tax is a separate question. Deductions can pull the taxable estate below the threshold even when the gross estate crosses it.

Nonresidents With Oregon Property

If you live in another state but own real property or tangible personal property in Oregon, your estate may still owe Oregon tax on that property. The state prorates the bill: it calculates what the full tax would be if the entire estate were taxable, then multiplies by the ratio of Oregon-situated property to total estate value.² A coastal vacation home held by an out-of-state owner is the classic example. Intangible property like stocks and bonds is not taxed for nonresidents.

How the Tax Is Calculated

Oregon taxes the “Oregon taxable estate,” which is the gross estate minus allowable deductions. Common deductions include debts, funeral costs, and administrative expenses of settling the estate.² Property passing to a surviving spouse qualifies for an unlimited marital deduction, and gifts to qualified charities qualify for a charitable deduction. Either can wipe out the taxable amount entirely.

The tax on the remaining amount is progressive. The first dollar above $1 million is taxed at 10%, and the top rate of 16% applies to amounts above $9.5 million:

$1,000,000 to $1,500,000: 10% on the amount over $1 million
$1,500,000 to $2,500,000: $50,000 plus 10.25% on the amount over $1.5 million
$2,500,000 to $3,500,000: $152,500 plus 10.5% on the amount over $2.5 million
$3,500,000 to $4,500,000: $257,500 plus 11% on the amount over $3.5 million
$4,500,000 to $5,500,000: $367,500 plus 11.5% on the amount over $4.5 million
$5,500,000 to $6,500,000: $482,500 plus 12% on the amount over $5.5 million
$6,500,000 to $7,500,000: $602,500 plus 13% on the amount over $6.5 million
$7,500,000 to $8,500,000: $732,500 plus 14% on the amount over $7.5 million
$8,500,000 to $9,500,000: $872,500 plus 15% on the amount over $8.5 million
$9,500,000 and above: $1,022,500 plus 16% on the amount over $9.5 million

Here’s how the math plays out on a $2 million Oregon taxable estate. The first $500,000 above the threshold is taxed at 10%, producing $50,000. The next $500,000 is taxed at 10.25%, producing $51,250. Total Oregon estate tax: $101,250.²

The Married Couple Problem

Federal law lets a surviving spouse claim the deceased spouse’s unused estate tax exemption, a feature called portability. Oregon does not. Each spouse gets one $1 million exemption, and if the first spouse to die doesn’t use it, that exemption vanishes.

Consider a couple with a combined $2 million estate, split equally. The first spouse dies and leaves everything to the survivor. No tax is due at that point because the marital deduction zeros out the taxable estate. But the first spouse’s $1 million exemption is now gone. When the surviving spouse dies with the full $2 million, only one exemption applies, and the estate owes tax on everything above $1 million.

A bypass trust (also called a credit shelter trust) at the first death solves this. The first spouse’s $1 million exemption shelters $1 million of assets in the trust, and the surviving spouse dies with only $1 million in their own name, at or below the exemption. Total tax across both deaths: zero. Without planning, the bill on the same estate could be $101,250. That difference makes professional estate planning worth the cost for Oregon couples with combined assets anywhere near $2 million.

Relief for Farms, Forestry, and Fishing Operations

Oregon offers a natural resource property credit under ORS 118.140 for estates built around farming, forestry, or commercial fishing. The credit can substantially cut the tax bill so families don’t have to sell working land to cover it.

To qualify, the estate must meet all of the following:

The total adjusted gross estate is $15 million or less.
At least 50% of the Oregon adjusted gross estate consists of natural resource property.
The decedent or a family member operated the business for at least five of the eight years before death.
The property stays in farm, forestry, or fishing use for at least five of the eight years after death.
The property passes to a family member.

The credit equals the estate tax before the credit multiplied by a ratio: the lesser of the natural resource property value or $7.5 million, divided by the total adjusted gross estate.² Violating the continued-use requirement during the eight years after death can trigger recapture taxes. Oregon also offers a separate natural resource property exemption under ORS 118.145 with different thresholds, so qualifying families should look at both.

Filing Deadline and What Late Costs

The personal representative files Oregon Form OR-706, the Oregon Estate Transfer Tax Return. Both the return and the tax payment are due within 12 months of the date of death. If a federal estate tax return was also filed, a copy goes in with the Oregon form.³

You can request a six-month extension to file, but the extension doesn’t push back the payment deadline. The extension request has to be submitted before the original 12-month due date.³

Miss the deadline and the penalties add up fast. If no return is filed by the due date, Oregon assesses an immediate 5% penalty on the tax owed. If the return is still not filed three months later, an additional 20% penalty applies, bringing the total to 25% of the tax due.²

Interest also accrues from the original due date, at a default statutory rate of 10% per year on a simple daily basis. That runs regardless of any filing extension, since an extension to file doesn’t pause interest on unpaid tax. On a $100,000 tax bill, 10% annual interest works out to roughly $27 a day.

How Oregon Compares to the Federal Estate Tax

The gap between Oregon and the federal government has never been wider. For 2026, the federal basic exclusion amount is $15 million per person, following the One, Big, Beautiful Bill Act signed into law on July 4, 2025.⁴ Oregon’s exemption is still $1 million. Most Oregon estates that owe state tax owe nothing federally.

The two taxes are calculated independently. An estate large enough to owe both pays both, though the federal tax allows a deduction for state estate taxes paid. Because most Oregon estates won’t file a federal return, common federal planning tools like portability elections and QTIP elections aren’t available by default, which puts more weight on Oregon-specific planning for estates in the $1 million to $15 million range.²

1
Oregon Department of Revenue. Estate Transfer and Fiduciary Income Taxes
2
Oregon State Legislature. Oregon Revised Statute Chapter 118 – Estate Tax
3
Oregon Department of Revenue. 2025 Form OR-706 Oregon Estate Transfer Tax Return Instructions
4
Internal Revenue Service. What’s New – Estate and Gift Tax