How to Complete and File Oregon Form OR-706: Deadlines and Elections

Oregon Form OR-706 is the state estate transfer tax return that an executor or personal representative files with the Oregon Department of Revenue after a death, and it is required whenever the decedent’s gross estate reaches $1 million. The return, along with all federal Form 706 schedules and supporting documents, goes to the Department of Revenue in Salem within 12 months of the date of death, and any tax owed is due on that same deadline. Because Oregon’s $1 million threshold sits far below the roughly $15 million federal exemption, many estates that owe nothing to the IRS still owe Oregon a return, and often a check.

Who Has to File

ORS 118.160 requires a return whenever the gross estate equals or exceeds $1 million. Gross estate means the total fair market value of everything the decedent owned or had an interest in at the moment of death: real estate, bank and brokerage accounts, retirement accounts, life insurance proceeds, business interests, before any subtraction for debts, mortgages, or expenses. If the total hits $1 million, the return is required even when the final tax calculation comes out to zero.

For Oregon residents, gross estate includes worldwide assets. Nonresidents must file if they owned real estate or tangible personal property physically located in Oregon and their total estate, including out-of-state property, meets the $1 million threshold. Nonresident estates apportion the tax on Part 2 of the form so Oregon taxes only the in-state share.¹

Oregon does not impose a gift tax, and lifetime gifts are not pulled back into the Oregon gross estate the way certain gifts are recaptured federally. Strategic lifetime giving can legitimately reduce the taxable estate for state purposes, which matters most for estates hovering near the $1 million line.

How Much the Estate Will Owe

Oregon’s tax is graduated, starting at 10 percent on the first dollar above $1 million and topping out at 16 percent above $9.5 million. The rate schedule from ORS 118.010 works like income tax brackets: each rate applies only to the portion of the taxable estate within that band.²

$1,000,000 to $1,500,000: 10.0% (no base tax)
$1,500,000 to $2,500,000: $50,000 plus 10.25% of the amount over $1.5 million
$2,500,000 to $3,500,000: $152,500 plus 10.5% of the amount over $2.5 million
$3,500,000 to $4,500,000: $257,500 plus 11.0% of the amount over $3.5 million
$4,500,000 to $5,500,000: $367,500 plus 11.5% of the amount over $4.5 million
$5,500,000 to $6,500,000: $482,500 plus 12.0% of the amount over $5.5 million
$6,500,000 to $7,500,000: $602,500 plus 13.0% of the amount over $6.5 million
$7,500,000 to $8,500,000: $732,500 plus 14.0% of the amount over $7.5 million
$8,500,000 to $9,500,000: $872,500 plus 15.0% of the amount over $8.5 million
$9,500,000 and above: $1,022,500 plus 16.0% of the amount over $9.5 million

A $2 million taxable estate falls in the second bracket. The tax is $50,000 plus 10.25 percent of the $500,000 above $1.5 million, totaling $101,250.

What to Gather Before You Start

Oregon does not have its own asset schedules. The instructions direct you to attach the federal Form 706 schedules, Schedules A through I and any supplements, even if the estate is not required to file a federal return.¹ In practice, you prepare a complete federal Form 706 as a pro-forma document and attach its schedules to the Oregon return. Federal forms are available at irs.gov or by calling 800-829-3676.

Pull these together before opening the form:

Decedent information: Social Security number, legal name, date of death, last known address, state of domicile.
Executor information: name, address, phone, and taxpayer identification number.
Real property: deeds, appraisals or comparable sales, and mortgage statements. Fair market value as of the exact date of death is the standard.
Financial accounts: date-of-death statements for bank, brokerage, and retirement accounts (IRAs, 401(k)s, pensions).
Life insurance: Form 712 (Life Insurance Statement) from each insurer for any policy the decedent owned or had incidents of ownership in. If you are excluding a policy from the gross estate, include Schedule D and Form 712 anyway with an explanation.
Business interests: partnership and unincorporated business interests on federal Schedule F (or Schedule E if jointly owned); closely held or inactive corporation stock on Schedule B with full details.
Trusts: a copy of the trust instrument if the decedent was a grantor or beneficiary.
Deductions: documentation for funeral expenses, attorney and executor fees, appraisal costs, debts owed by the decedent, and charitable bequests.

Working Through the Form

OR-706 is organized into three parts. Part 1 collects identifying information about the decedent and executor and asks a series of yes-or-no questions about the estate, including whether an Oregon QTIP or OSMP election is being made, whether special-use valuation applies, and whether the estate includes trust or insurance interests. Part 2 is the tax computation: enter the federal taxable estate, apply Oregon adjustments, calculate tax using the rate table above, and determine the net amount payable, including apportionment for nonresidents. Part 3 covers additional questions about estate composition and elections.

If assets sit outside Oregon, lines 6 through 8 of Part 2 handle apportionment. Divide the gross value of Oregon property by the total gross estate to get the Oregon fraction, then apply that fraction to the computed tax.¹ Only Oregon’s share of the tax is owed.

If you used estimated values for marital or charitable deduction property on the federal return under Treasury Regulation 20.2010-2(a)(7)(ii), Oregon requires a separate schedule listing each asset by schedule letter, item number, and estimated value. Missing this schedule is a common processing-delay trigger.¹

Assemble the return in the order specified on page 9 of the instructions. The Department warns that processing is delayed when required documents are missing or the return is out of order. The executor must sign under penalties of false swearing, and a paid preparer must also sign.

Oregon-Specific Elections and Credits That Change the Bill

No Portability Between Spouses

The federal system lets a surviving spouse inherit any unused portion of the deceased spouse’s exemption. Oregon does not. Each person gets exactly the $1 million threshold, and if the first spouse to die does not use it, that room disappears. A married couple who simply leaves everything to the survivor loses the first spouse’s Oregon exclusion. This is the single biggest planning difference between the state and federal systems.

State-Only QTIP and OSMP Elections

Oregon allows an executor to make a state-only qualified terminable interest property (QTIP) election, claiming a different QTIP amount on the Oregon return than on the federal return. The purpose is to shelter property from Oregon tax at the first spouse’s death by routing it through a marital trust while still using the federal unified credit fully.³

Oregon also created Oregon Special Marital Property (OSMP), which applies to trusts or property interests where only the surviving spouse can receive income or principal during their lifetime.⁴ You elect OSMP on the return by identifying the specific assets, schedule, and item number along with the amount or fractional interest included. When the surviving spouse later dies, the QTIP or OSMP property is included in their Oregon gross estate. For a nonresident surviving spouse, only Oregon-located real and tangible personal property is pulled back in.

Natural Resource Credit for Farm, Forest, and Fishing Estates

Oregon offers a substantial credit under ORS 118.140 for estates that include property used in farming, forestry, or fishing.⁵ All four conditions must be met:

The total adjusted gross estate cannot exceed $15 million.
Natural resource property must be at least 50 percent of the total adjusted gross estate located in Oregon.
The natural resource property must pass to a family member.
The decedent or a family member must have operated the farm, forestry, or fishing business using the property for at least five of the eight years ending on the date of death.

The credit equals the tax otherwise owed multiplied by a fraction: the numerator is the lesser of the natural resource property value claimed or $7.5 million, and the denominator is the total adjusted gross estate. An additional operating allowance can be claimed but cannot exceed the lesser of $1 million or 15 percent of the total natural resource property value (excluding the operating allowance itself). For a family farm, the credit can wipe out most or all of the tax.

Deadline, Extensions, and What Happens If You Miss It

The return and full tax payment are due 12 months after the date of death.⁶ The due date is the day in the 12th calendar month that corresponds numerically to the day of death. Death on March 15 means the return is due the following March 15. If the decedent died on the 31st and the 12th month has only 30 days, the last day of that month is the deadline.⁷

Need more time? File Form OR-706-EXT before the original due date for an automatic six-month extension. It’s granted automatically as long as the application is received or postmarked by the deadline. If you miss the window for the automatic extension, you can still apply within six months of the original due date, but you must include a written statement showing good and sufficient cause.⁸ Executors out of the country may apply for an extension beyond the automatic six months. When you eventually file the return with an approved extension, include only the approval letter, not a copy of Form OR-706-EXT.

An extension to file does not extend the time to pay. Interest accrues on any unpaid balance starting the day after the original 12-month deadline, regardless of any filing extension. A separate request for an extension of time to pay can be made on the same Form OR-706-EXT, but the Department requires security and limits the payment extension to 14 years from the original due date.⁹

Penalties under ORS 118.260 escalate:¹⁰

Late filing or late payment: 5 percent of the unpaid tax. When both failures occur, only one 5 percent penalty is assessed.¹¹
Continued failure to file beyond three months past the due date (or extended due date): an additional 20 percent on top of the 5 percent.

For both penalties, the tax used in the calculation is reduced by any amount paid on or before the original due date (extensions do not count), so paying what you can by the deadline shrinks the penalty base even if the return is not ready.

Interest accrues at 8 percent per year on unpaid tax for interest periods beginning on or after January 1, 2026. If the tax remains unpaid more than 60 days after assessment, an additional 4 percent per year kicks in, bringing the effective rate to 12 percent. Interest is charged only on the tax itself, not on penalties.¹² Even if you need a filing extension, send your best estimate of the tax by the 12-month deadline.

Where to Send the Return and How to Pay

The mailing address depends on whether payment is enclosed:

With payment: Oregon Department of Revenue, PO Box 14555, Salem OR 97309-0940¹
Without payment: Oregon Department of Revenue, PO Box 14110, Salem OR 97309-0910¹³

If you send payment separately from the return, use Form OR-706-V (the estate transfer tax payment voucher) and mail it to PO Box 14950, Salem OR 97309-0950.¹⁴ Do not include Form OR-706-V when you mail the return itself; the voucher is only for standalone payments. Electronic payments are accepted through Oregon Revenue Online at revenueonline.dor.oregon.gov, either from a bank account or by credit card, though service provider fees may apply to credit card transactions.¹⁵

What Happens After You File

The Department of Revenue reviews the reported values, deductions, and elections. If everything checks out, it issues an Estate Tax Release, the document confirming Oregon has no further claim against the estate’s assets. This release is essential for clearing title on real property and transferring large financial accounts to beneficiaries. Without it, title companies and financial institutions will generally refuse to complete the transfer.

If the Department finds discrepancies or missing documents, it issues a request for additional information before the estate can close. Common triggers: missing federal schedules, unsigned returns, omitted trust instruments, and excluded life insurance policies with no explanation for the exclusion.

1
Oregon Department of Revenue. Form OR-706 Instructions
2
Oregon State Legislature. Oregon Revised Statutes Chapter 118 – Estate Tax
3
Legal Information Institute (LII). Or. Admin. Code 150-118-0080 – Elections
4
Oregon Public Law. ORS 118.013 – Taxable Estate Adjustment for Oregon Special Marital Property
5
Oregon Public Law. ORS 118.140 – Credit Based Upon Value of Natural Resource Property
6
Oregon State Legislature. Oregon Revised Statutes Chapter 118 – Estate Tax – Section 118.100
7
Legal Information Institute (LII). Or. Admin. Code 150-118-0090 – Due Dates and Extensions of Time to File
8
Oregon Department of Revenue. Form OR-706-EXT Instructions
9
Oregon State Legislature. Oregon Revised Statutes Chapter 118 – Estate Tax – Section 118.225
10
Oregon Public Law. ORS 118.260 – Penalties for Delinquency, Failure to File and Fraud
11
Oregon Public Law. OAR 150-118-0170 – Penalties and Interest
12
Oregon Department of Revenue. Penalties and Interest for Personal Income Tax
13
Oregon Department of Revenue. Mailing Addresses
14
Oregon Department of Revenue. Form OR-706-V Instructions
15
Oregon Department of Revenue. Make a Payment