Oregon Estate Tax: Rates, Exemption, and Filing OR-706

Most families settling an estate in Oregon get blindsided by one fact: while the federal estate tax exemption sits at $15,000,000 for 2026, Oregon's kicks in at just $1,000,000 — and that threshold has never been adjusted for inflation.

A Portland home, a retirement account, and a modest life insurance policy can push a perfectly ordinary middle-class estate over the line. If that happens, the personal representative has exactly 12 months from the date of death to file Form OR-706 and pay any tax owed.

What Triggers Oregon's Estate Tax

Oregon imposes a state-level Estate Transfer Tax under ORS Chapter 118. If the gross value of the decedent's estate meets or exceeds $1,000,000, the estate must file Form OR-706 with the Oregon Department of Revenue.

The critical word here is gross. This calculation includes every asset the decedent owned or had an interest in at death — not just assets passing through probate. That means:

• The fair market value of the family home
• Retirement accounts (IRAs, 401(k)s, state pensions)
• Life insurance death benefits
• Bank accounts with payable-on-death designations
• Assets held in a revocable living trust

A family with a $500,000 Portland home, a $350,000 retirement account, and a $200,000 life insurance policy hits $1,050,000 before accounting for vehicles, savings, or personal property. The estate owes state tax even though it would owe nothing at the federal level.

Oregon Estate Tax Rates

Once the estate exceeds $1,000,000, only the value above the threshold is taxed. The rate is graduated:

For a $1.2 million estate, the taxable amount is $200,000. At 10%, that's a $20,000 state tax bill — before any accounting or professional fees.

The Oregon Estate Tax Exemption and Portability

Oregon's $1,000,000 exemption is per decedent. Unlike the federal estate tax, Oregon does not offer portability — a surviving spouse cannot absorb their deceased spouse's unused exemption. Each spouse has their own $1,000,000 threshold, used or lost.

There is a marital deduction: property passing outright to a surviving spouse is generally deductible from the taxable estate. But that only defers the tax — it doesn't eliminate it. The surviving spouse's estate will face the same $1,000,000 threshold upon their death, often with the combined assets of both spouses.

Oregon also allows a deduction for property passing to a qualified charity. Estates with significant charitable bequests may reduce or eliminate the tax liability through careful planning.

As of 2026, the Oregon legislature has considered raising or indexing the exemption multiple times, including Senate Bill 1511 and subsequent ballot initiative efforts, but the $1,000,000 floor remains in place.

Filing Form OR-706: Deadlines and Requirements

Deadline: Form OR-706 must be filed and all taxes paid within 12 months of the decedent's date of death for deaths occurring on or after January 1, 2022.

Extension to file: A personal representative can request a six-month extension to file the paperwork using Form OR-706 EXT. Critically, this extension applies to the filing deadline only — not the payment deadline. Estimated taxes are still due at the 12-month mark. Failing to pay on time triggers interest and substantial penalties.

What to include: OR-706 requires a complete schedule of all assets and their fair market values at date of death, including non-probate assets. This means life insurance, retirement accounts, joint tenancies, and trust assets all get reported and valued. Professional appraisals are typically required for real estate and closely held businesses.

If you're managing an estate that may approach $1,000,000 in gross value, engage a CPA as early in the process as possible. The valuation work, asset discovery, and document gathering needed to file OR-706 accurately can take several months.

Oregon vs. Federal Estate Tax: Key Differences

The federal return (Form 706) is only required if the estate exceeds $15,000,000, so the vast majority of Oregon families who file OR-706 will not owe federal estate tax. The two returns are filed separately — one with Oregon DOR, one with the IRS.

Oregon repealed its separate inheritance tax for deaths after January 1, 2012. Beneficiaries do not owe an additional state tax on the specific assets they inherit, provided the estate has settled the transfer tax.

Fiduciary Income Tax: A Second Filing Obligation

Beyond the estate tax, the personal representative may need to file Form OR-41 — the Oregon Fiduciary Income Tax return. If estate assets continue generating income during the settlement period (rental income, dividends, interest), that income is taxable to the estate as a separate legal entity. For estates operating on a calendar year, the OR-41 for 2025 income was due April 15, 2026.

What to Do If the Estate Is Close to $1 Million

If you're uncertain whether the gross estate hits the threshold, don't guess. The cost of a preliminary valuation with a CPA is far less than the penalties for a late or incorrect OR-706. Document the value of every asset at the date of death — use official appraisals for real estate, account statements as of death for financial accounts, and Blue Book valuations for vehicles.

The Oregon Department of Revenue can and does audit OR-706 returns. Understating the gross estate is one of the most common errors personal representatives make, often because they only value assets going through probate and ignore non-probate transfers.

If you're administering an Oregon estate and navigating the state's estate tax rules, the Oregon Estate Settlement Guide walks through the OR-706 timeline, the asset inventory process, and the mandatory notifications to state agencies — in plain English, in the right sequence.

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