Oregon Estate Tax Rates, Exemptions, and the $1 Million Threshold

Your parent's home in Portland is worth $650,000. Add a retirement account, a car, and a small savings account, and the estate is over $1 million. Most families do not expect a state tax bill at that level — but Oregon's estate tax applies to estates above $1 million, the lowest threshold of any state in the country. That gap between what families expect and what Oregon actually taxes trips up executors and heirs every year.

This guide explains how Oregon's estate tax works, what the rate schedule looks like at every asset level, and why the no-portability rule makes planning especially important for married couples.

Oregon's $1 Million Threshold

The federal estate tax exemption is $13.61 million per person in 2026. Oregon's threshold has been $1 million since 2012, with no inflation adjustment. These two numbers live in completely separate systems: an estate that owes nothing to the IRS may owe tens of thousands of dollars to Oregon.

Oregon estate tax is imposed on the estate itself — the legal entity that holds and distributes assets after death — not on the individual heirs. The executor calculates the tax, files Oregon Form OR-706 (the Oregon Estate Transfer Tax Return), and pays from estate funds before distributing anything to beneficiaries.

Roughly 5% of Oregon estates trigger the tax. In the Portland metro area and other high-value regions, that number is higher, because moderate homes plus accumulated retirement savings cross $1 million without any particularly extraordinary wealth.

What the Oregon Estate Tax Rate Schedule Looks Like

Oregon taxes only the amount above $1 million. The first $1 million of an Oregon estate is exempt. Amounts above that face a graduated rate:

A practical example: an estate worth $1.4 million after allowable deductions has $400,000 above the threshold. At 10%, that is $40,000 owed to Oregon before a single dollar goes to heirs. An estate of $2 million taxable would owe roughly $115,000.

What Goes Into the Oregon Gross Estate

Oregon follows the federal gross estate definition under IRC Section 2031. The gross estate — the starting point for calculating the tax — is broad:

Real property at full fair market value, not equity. A home worth $700,000 with a $200,000 mortgage counts as $700,000 in the gross estate. The mortgage is a deductible debt, but it does not reduce the gross estate figure used to determine whether a return must be filed.

Financial accounts: bank accounts, brokerage accounts, money market funds, certificates of deposit.

Retirement accounts: IRAs and 401(k)s are fully included in the Oregon gross estate even though beneficiaries will pay income tax on distributions later. This effective double tax (estate tax plus eventual income tax) is a known feature of Oregon's system.

Life insurance: Proceeds from policies the decedent owned or had incidents of ownership over are included in the gross estate, even if they pass directly to a named beneficiary and never touch probate.

Business interests: Ownership in LLCs, S-corporations, partnerships, or sole proprietorships at fair market value as of the date of death. Business interests often require formal business valuation appraisals.

Jointly owned property: Generally half for married couples; potentially more for other joint owners depending on contribution evidence.

Personal property of value: art, jewelry, collectibles, vehicles (though vehicles themselves are modest in most estates).

What Can Be Deducted

The Oregon taxable estate is the gross estate minus:

Debts: Mortgages, credit cards, medical bills, personal loans outstanding at the date of death.

Administration expenses: Executor fees, attorney fees, court costs, appraisal fees, and accounting fees paid during estate administration are deductible — but only when actually paid, not when estimated.

Funeral and burial expenses: Reasonable costs are deductible.

The unlimited marital deduction: Property that passes outright to a surviving U.S. citizen spouse is fully deductible. This often drives the Oregon estate tax to zero at the first death — but at a cost, discussed below under portability.

Charitable deductions: Property passing to qualifying charitable organizations reduces the taxable estate.

After deductions, the taxable estate is what the rate schedule applies to. An estate with a $1.5 million gross estate and $300,000 in deductible debts has a $1.2 million taxable estate — $200,000 above the threshold, taxed at 10%.

The Marital Deduction and the No-Portability Trap

The unlimited marital deduction is Oregon's most powerful deduction and its most dangerous planning trap.

When the first spouse dies, everything can pass to the surviving spouse tax-free — the marital deduction wipes out the Oregon estate tax entirely. Families breathe a sigh of relief. But what they have done is combine both spouses' assets in the surviving spouse's estate, which now only has the surviving spouse's own $1 million Oregon exemption to work with.

The federal estate tax solved this problem with portability: the surviving spouse can "inherit" the unused portion of the first spouse's federal exemption by filing a timely federal estate tax return after the first death. This allows married couples to effectively shield $27.22 million from federal tax.

Oregon has no portability. Oregon's $1 million exemption cannot be transferred between spouses. The first spouse's exemption disappears at death if unused. The surviving spouse's estate gets one $1 million Oregon exemption, period.

The planning solution is a bypass trust (credit shelter trust). Instead of leaving everything to the surviving spouse outright, the first spouse's estate plan directs up to $1 million into a bypass trust at death. The bypass trust can still benefit the surviving spouse — income distributions and even principal distributions under defined standards — but the trust assets are not included in the surviving spouse's estate. At the surviving spouse's death, each person's $1 million Oregon exemption has been used, protecting $2 million from Oregon estate tax.

Without a bypass trust and without timely filing to preserve planning options at the first death, a married couple may pay significant Oregon estate tax at the second death that could have been avoided.

The Nine-Month Deadline for Form OR-706

If the gross estate exceeds $1 million, Form OR-706 must be filed and any tax paid within nine months of the date of death. No exceptions, no automatic extensions for payment.

A six-month extension of time to file the return is available — but it is only an extension to file the paperwork, not to pay the tax. Estimated tax must still be paid by the nine-month deadline to avoid interest charges. Interest begins accruing from the original due date on any unpaid amount.

Given how long it takes to value real property, get business appraisals, open probate, and gather account statements, nine months can feel tight. Executors should start the process within weeks of the death, not months.

Oregon's Separate QTIP and Natural Resource Provisions

Oregon allows a state-only QTIP election on Form OR-706 under ORS 118.016. This is meaningful because it can be made independently of the federal QTIP election, allowing the estate to optimize differently at the state and federal levels.

Oregon also provides an estate tax exemption for qualifying natural resource property — farms, timberlands, and commercial fishing operations — under ORS 118.140. The exemption requires an affirmative election on OR-706 and is subject to recapture if heirs sell or convert the property within a specified period.

Both elections are made on the return and cannot be made retroactively.

Nonresident Estates With Oregon Property

Estates of people who lived outside Oregon but owned Oregon real estate or business interests owe Oregon estate tax on those Oregon-sited assets. The tax is calculated by determining the full estate tax on the worldwide estate, then multiplying by the ratio of Oregon assets to total assets. The result is Oregon's proportional share of the total estate tax.

This means that a California resident who owned an Oregon vacation home could trigger an Oregon estate tax filing even if California has no estate tax.

Getting to the Right Number

Oregon estate tax is one of the larger financial obligations in settling a sizable estate. Getting the gross estate calculation right, identifying every allowable deduction, and making the correct elections on OR-706 are the three levers that determine the actual tax owed. Missing a deduction costs real money. Missing an election like the QTIP cannot be fixed after the return is filed.

The Oregon Final Tax & Estate Tax Guide covers the full Oregon estate tax calculation, Form OR-706 preparation, and the planning elections available on the return — organized for executors managing an Oregon estate from initial inventory through final tax payment.

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