Deras v. Dept. of Rev.

Oregon Tax Court·Decided April 6, 2026·No. TC 5477·Unpublished

Opinion

IN THE OREGON TAX COURT

REGULAR DIVISION

Income Tax

WARREN C. DERAS, )

)

Plaintiff, ) TC 5477 (Control); TC 5483 v. )

)

DEPARTMENT OF REVENUE, ) State of Oregon, )

)

Defendant. ) ORDER ON SUMMARY JUDGMENT

I. INTRODUCTION

In these consolidated personal income tax cases, Plaintiff argues that Oregon is prohibited from including federally taxable social security benefits or the interest on federal debt obligations when setting the threshold level of income that is used to “phase out” a taxpayer’s eligibility for certain personal income tax subtractions and credits.

As to the inclusion of social security benefits, Plaintiff relies on Article IX, Section 9 of the Oregon Constitution, which provides:

“Benefits payable under the federal old age and survivors insurance program or benefits under section 3(a), 4(a) or 4(f) of the federal Railroad Retirement Act of 1974, as amended, or their successors, shall not be considered income for the purposes of any tax levied by the state or by a local government in this state. Such benefits shall not be used in computing the tax liability of any person under any such tax. Nothing in this section is intended to affect any benefits to which the beneficiary would otherwise be entitled. This section applies to tax periods beginning on or after January 1, 1986.”

Or Const, Art IX, § 9 (Article IX, Section 9) (emphasis added). 1

1 Unless otherwise indicated, (1) references to the Oregon Constitution and the Oregon Revised Statutes (ORS) are to the 2023 editions; and (2) references to the “IRC,” or to the “Code,” are to the Internal Revenue Code of 1986, as amended and in effect for 2023.

ORDER ON SUMMARY JUDGMENT TC 5477 (CONTROL); TC 5483 Page 1 of 49

As to the inclusion of interest on federal debt obligations, Plaintiff relies on a federal statute that provides:

“(a) Stocks and obligations of the United States Government are exempt from taxation by a state or political subdivision of a state. The exemption applies to each form of taxation that would require the obligation, the interest on the obligation, or both, to be considered in computing a tax, except--

“(1) a nondiscriminatory franchise tax or another nonproperty tax instead of a franchise tax, imposed on a corporation; and

“(2) an estate or inheritance tax.

“(b) The tax status of interest on obligations and dividends, earnings, or other income from evidences of ownership issued by the Government or an agency and the tax treatment of gain and loss from the disposition of those obligations and evidences of ownership is decided under the Internal Revenue Code of 1986 (26 U.S.C. 1 et seq.). An obligation that the Federal Housing Administration had agreed, under a contract made before March 1, 1941, to issue at a future date, has the tax exemption privileges provided by the authorizing law at the time of the contract. This subsection does not apply to obligations and evidences of ownership issued by the District of Columbia, a territory or possession of the United States, or a department, agency, instrumentality, or political subdivision of the District, territory, or possession.”

31 USC § 3124 (the federal exempt interest statute) (emphasis added).

Defendant argues that including social security benefits and the interest on federal debt obligations in Oregon’s phase-out thresholds does not violate either provision. The court is not aware of any Oregon cases on point as to either issue. The parties have stipulated to the relevant facts and present the issues on cross-motions for summary judgment.

The court agrees with Plaintiff. For each of the tax years 2023 and 2024, Plaintiff had social security benefits and interest on federal debt obligations that were included in his adjusted gross income (AGI) under federal law. He was affected by three of Oregon’s statutes that use AGI as a component of formulas to phase out subtractions 2 and credits. See ORS 316.695(3)

2 Oregon law uses the term “subtraction” in the same way federal tax law uses the term “deduction”: to describe allowable reductions of taxable income. See IRC § 161 (allowance of deductions); ORS 316.680 (“There shall be subtracted from federal taxable income [lists subtractions].”).

ORDER ON SUMMARY JUDGMENT TC 5477 (CONTROL); TC 5483 Page 2 of 49

(subtraction for federal tax liability); ORS 316.693(3) (subtraction for medical expenses); ORS 316.085(5) (“personal exemption” credit). As a result, Plaintiff had greater Oregon personal income tax liability than he would have had if his social security benefits and interest on federal debt obligations had not been included in AGI.

The court concludes that the inclusion of social security benefits in these three statutes violates the plain text of the second sentence of Article IX, Section 9 (emphasized above) by “us[ing]” the benefits in “computing” Plaintiff’s “tax liability.” This interpretation is consistent with uses of the same key terms in other statutes as of the 1986 passage of Article IX, Section 9, and with the United States Supreme Court’s then-recent interpretation of the similar provision in the federal exempt interest statute. The court finds no inconsistency with the May 1986 voter pamphlet and a contemporaneous newspaper editorial, because neither of those sources of context addresses the inclusion of social security benefits in phase-outs or other formulas. Those materials address only the subtraction of social security benefits from federal taxable income, which is not at issue in this case. The same is true of the legislative history of the 1985 resolution and bill that, respectively, referred and implemented what became Article IX, Section 9; the court has found no mention of the prohibition against using social security benefits in computing tax liability.

As further context, at least eight other statutory formulas referring to AGI (or directly to social security benefits) to potentially increase or decrease Oregon tax liability were in place in 1985 when the legislature voted on the referral, and because there was no special session during the 1985-87 biennium, those same formulas were in place in 1986 when the voters approved Article IX, Section 9. Legislators are deemed to have been aware of these formulas, and a colloquy in the legislative history of a wide-ranging 1985 “reconnect” bill indicates that

ORDER ON SUMMARY JUDGMENT TC 5477 (CONTROL); TC 5483 Page 3 of 49 legislators were specifically aware that including social security benefits in AGI could affect tax liability, although nothing in the colloquy addresses whether or how the potential referral and passage of Article IX, Section 9 would affect that inclusion. While the pre-existing formulas and the colloquy are some evidence that the legislature itself may have believed that the second sentence of Article IX, Section 9 does not prohibit the inclusion of social security benefits in phase-out formulas, the court finds any such belief to be in conflict with the plain text. And even if legislators had that belief, the court sees no basis to impute it to the voters. Voters may have read the plain text of Article IX, Section 9 as a prohibition against new phase-outs that increase tax liability based on social security benefits, and as a directive to undo existing ones. The fact that the legislature, in the 1987 session and in later years, went on to enact more such phase-outs is not relevant as context to discern the intention of the voters in May 1986. Overall, what context exists either supports the court’s reading of the plain text, is neutral, or deserves little weight compared to the text.

As to the inclusion of interest on federal debt obligations in the three AGI-based phase-

Free access — add to your briefcase to read the full text and ask questions with AI

Deras v. Dept. of Rev., (Or. Super. Ct. 2026).

Deras v. Dept. of Rev. (Deras v. Dept. of Rev.) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

Related

American Bank & Trust Co. v. Dallas County
463 U.S. 855 (Supreme Court, 1983)
State v. Kellar
247 P.3d 1232 (Oregon Supreme Court, 2011)
State v. Gaines
206 P.3d 1042 (Oregon Supreme Court, 2009)
Schwinden v. Burlington Northern, Inc.
691 P.2d 1351 (Montana Supreme Court, 1984)
Borg v. Department of Revenue
774 P.2d 1099 (Oregon Supreme Court, 1989)
Deras v. Myers
535 P.2d 541 (Oregon Supreme Court, 1975)
Blanchana, LLC v. Bureau of Labor and Industries
318 P.3d 735 (Oregon Supreme Court, 2014)
State v. Sagdal
343 P.3d 226 (Oregon Supreme Court, 2015)
State v. Lane
355 P.3d 914 (Oregon Supreme Court, 2015)
AAA Oregon/Idaho Auto Source, LLC v. State
423 P.3d 71 (Oregon Supreme Court, 2018)
Con-Way Inc. & Affiliates v. Department of Revenue
302 P.3d 804 (Oregon Supreme Court, 2013)
State v. Link
482 P.3d 28 (Oregon Supreme Court, 2021)