OAR 150-314-0205
Substantial Understatement Penalty (SUP)

(1) The department will assess a penalty if a substantial understatement of net tax exists for any taxable year. The penalty is equal to 20 percent of the amount of any underpayment of net tax attributable to the understatement. A substantial understatement exists only if incurred on the return of the individual, corporation, or reporting entity required to file a return and pay tax.
(2) Net Tax. In determining if a substantial understatement of net tax exists, net tax equals the total tax as calculated in accordance with the applicable provisions of ORS chapters 314, 315, 316, 317, and 318, reduced by nonrefundable and refundable credits.
(3) Substantial Understatement of Net Tax. An understatement of net tax is substantial if the understatement exceeds $3,750 for corporations (other than S corporations, as defined in section 1361 of the Internal Revenue Code, or a personal holding company, as defined in section 542 of the Internal Revenue Code), or exceeds $2,550 for individuals and all other taxable entities.
(4) Penalty. The substantial understatement penalty is equal to 20 percent of the amount of the understatement of net tax.
(a) The total understatement of net tax is the amount of net tax due as determined by the department, minus:
(A) Net tax as reported on the return by the taxpayer for the taxable year,
(B) The tax attributable to any item for which there is or was substantial authority, and
(C) The tax attributable to any item for which the relevant facts affecting the item’s tax treatment are adequately disclosed on the return or in a statement attached to the return, and there is a reasonable basis for the tax treatment of the item by the taxpayer.
(b) Net tax as reported on the return is the amount of net tax reported by the taxpayer and determined before the taxpayer was first notified by the department concerning their tax liability. If the return shows no net income tax, the amount of net tax shown on the return is considered to be zero. In all cases, net tax as reported is computed without regard to:
(A) Withholdings;
(B) Estimated tax paid by the taxpayer; or
(C) The state surplus refund pursuant to ORS 291.349 (Revenue estimate).
(5) The department will not impose a penalty under ORS 314.402 (Understatement of net tax) unless a return has been filed.
(6) The following table shows threshold amounts used by the department to compute the substantial understatement penalty.

Source: Rule 150-314-0205 — Substantial Understatement Penalty (SUP), https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=150-314-0205.

150‑314‑0005
Period of Computation of Taxable Income 150‑314‑0010
Mitigation of Effect of Limitations and Other Provisions 150‑314‑0012
Determination by Agreement 150‑314‑0025
Pollution Control Facilities: Revocation of Certificate 150‑314‑0027
Pollution Control Facilities: Facilities Not Eligible for Tax Credit 150‑314‑0035
Formula for Apportionment of Lobbying Expenses Subject to Proxy Tax 150‑314‑0040
Withholding on Real Property Conveyances 150‑314‑0045
REMIC Filing Requirements 150‑314‑0047
REMIC Income Taxable to Nonresidents 150‑314‑0055
Change in Methods of Accounting or Reporting 150‑314‑0060
Election to Use Alternative Apportionment Weightings by Taxpayers Engaged in Utilities or Telecommunications 150‑314‑0062
Apportionment and Allocation of Income of Financial Organizations and Public Utilities from Business Activities Within and Without Oregon 150‑314‑0064
Definitions 150‑314‑0066
Apportionment and Allocation of Income Generally 150‑314‑0068
Allocation of Income 150‑314‑0070
Apportionment Factors Generally 150‑314‑0072
Apportionment Factors 150‑314‑0074
Modified Factors for Carriers of Freight or Passengers: General Rule 150‑314‑0076
Modified Factors for Carriers of Freight or Passengers: Special Rules — Railroads 150‑314‑0078
Modified Factors for Carriers of Freight or Passengers: Special Rules — Airlines 150‑314‑0080
Modified Factors for Carriers of Freight or Passengers: Special Rules — Trucking Companies 150‑314‑0082
Modified Factors for Companies Engaged in Sea Transportation Service 150‑314‑0084
Modified Factors for Companies Involved in Interstate River Transportation Service 150‑314‑0086
Other Methods: Limited Application 150‑314‑0088
Modified Factors for Financial Institutions 150‑314‑0090
Public Utilities: Sale of Commodities 150‑314‑0100
Disallowance of Certain Intercompany Transactions Involving Intangible Assets 150‑314‑0105
Farm Income Averaging 150‑314‑0110
Allocation of Oregon Modifications to Passive Activity Losses 150‑314‑0115
Interest on Deferred Oregon Tax Liability with Respect to Installment Obligations 150‑314‑0120
Reduction of Tax Attributes after Discharge of Debt 150‑314‑0125
Listed Transaction Reporting Requirement 150‑314‑0130
Definition: Final Determination 150‑314‑0135
Returns When Accounting Period Changed 150‑314‑0140
Information Returns 150‑314‑0142
Brokers’ Information Returns 150‑314‑0150
Requirement to File Returns Electronically (Corporation E-file Mandate) 150‑314‑0152
Requirement to File Returns Electronically 150‑314‑0160
Report of Changes in Federal Taxable Income 150‑314‑0165
Filing Returns of Income: Due date 150‑314‑0167
Filing Returns of Income: Extensions, Chapters 316, 317 and 318 150‑314‑0169
Standards for Substitute Tax Forms 150‑314‑0171
Alternative Filing Methods 150‑314‑0173
Time Limitations Affected by Military Service 150‑314‑0175
Time Limitations for Persons Outside United States 150‑314‑0185
Payment of Tax 150‑314‑0187
Responsibility for Tax Payments 150‑314‑0195
Delinquency Penalty 150‑314‑0197
Failure to File Penalty 150‑314‑0199
Interest on Deficiencies and Delinquencies 150‑314‑0205
Substantial Understatement Penalty (SUP) 150‑314‑0207
Waiver of 20 Percent Substantial Understatement of Net Tax Penalty Imposed under ORS 314.402 150‑314‑0209
Substantial Authority, Adequate Disclosure and Reasonable Basis 150‑314‑0215
Listed Transaction Understatement 150‑314‑0220
Additional Assessments 150‑314‑0222
Five-Year Statute of Limitations 150‑314‑0224
Time Limit to Make Adjustment 150‑314‑0226
Notification of Gain Realized Upon the Sale or Exchange of a Principal Residence 150‑314‑0228
Extension of Period for Assessment 150‑314‑0230
Effect of Federal Extension of Period for Assessment 150‑314‑0240
Refunds Generally 150‑314‑0242
Refunds 150‑314‑0244
Minimum Offset Amount 150‑314‑0246
Interest Computation — Offset 150‑314‑0248
Refund Offset Priority 150‑314‑0250
Refunds 150‑314‑0252
Effect of Federal Extension of Period for Assessment 150‑314‑0254
Separate Refunds When a Joint Return Has Been Filed 150‑314‑0256
Refunds of Tax Overpayments to Spouse or Heirs 150‑314‑0265
Model Recordkeeping and Retention 150‑314‑0267
Requirement to Provide Copies of Documents 150‑314‑0275
Definition: Collection Charge 150‑314‑0277
Payment Secured by Bond, Deposit or Otherwise 150‑314‑0279
Statute of Limitation on Tax Collection 150‑314‑0285
Assessment of Withholding Tax Against Liable Officers 150‑314‑0290
Estimated Tax: When Estimates Are Required 150‑314‑0292
Estimated Tax: When Estimates Are Required For Tax Exempt Corporations 150‑314‑0294
Estimated Tax: Affiliated Corporations 150‑314‑0300
Estimated Tax: Due Dates of Payments for Short-Period Returns 150‑314‑0302
Estimated Tax: Application of Payments 150‑314‑0310
Requirement to Use Electronic Funds Transfer 150‑314‑0315
Corporation Estimated Tax: Delinquent or Underestimated Payment or Both, Constitutes Underpayment 150‑314‑0317
Estimated Tax: Consolidated Return Underpayments 150‑314‑0319
Estimated Tax: Apportioned Returns 150‑314‑0321
Estimated Tax: Application of Net Loss, Annualized Income Exception 150‑314‑0323
Estimated Tax: Interest on Underpayment 150‑314‑0325
Estimated Tax: Computation of Underpayment 150‑314‑0327
Underpayment of Estimated Tax 150‑314‑0335
Apportionable and Nonapportionable Income Defined 150‑314‑0337
Apportionable and Nonapportionable Income 150‑314‑0339
Proration of Deductions 150‑314‑0345
Apportionment and Allocation of Income Generally 150‑314‑0347
Application of ORS 314.610 to 314.667: Allocation 150‑314‑0349
Apportionment and Allocation for a Taxpayer Carrying on a Unitary Business 150‑314‑0351
Two or More Businesses of a Single Taxpayer 150‑314‑0353
Apportionment for Long-Term Construction Contracts 150‑314‑0355
Special Rules: Installment Sales 150‑314‑0357
Modified Factors for Motion Picture and Television Film Producers 150‑314‑0365
Taxable in Another State 150‑314‑0367
Taxable in Another State 150‑314‑0369
Taxable in Another State 150‑314‑0371
Taxable in Another State 150‑314‑0380
Allocation of Interest and Dividends 150‑314‑0385
Apportionment Formula 150‑314‑0390
Property Factor 150‑314‑0392
Property Factor 150‑314‑0394
Property Factor 150‑314‑0396
Property Factor 150‑314‑0398
Property Factor 150‑314‑0400
Property Factor 150‑314‑0402
Property Factor 150‑314‑0404
Property Factor 150‑314‑0406
Property Factor 150‑314‑0415
Payroll Factor 150‑314‑0417
Payroll Factor 150‑314‑0425
Sales Factor 150‑314‑0427
Sales Factor 150‑314‑0429
Sales Factor 150‑314‑0431
Sales Factor 150‑314‑0435
Sales Factor 150‑314‑0437
Gross Receipts Related to Deferred Gain or Loss 150‑314‑0455
Modified Factors for Publishing 150‑314‑0460
Apportionment of Net Loss 150‑314‑0465
Sales Factor for Interstate Broadcasters 150‑314‑0470
Interstate Broadcasters: Net Income Attributable to this State 150‑314‑0475
Consistent Treatment of Partnership Items 150‑314‑0480
Publicly Traded Partnerships Taxed as Corporations 150‑314‑0485
Partnership Information Returns 150‑314‑0487
Partnership Penalty 150‑314‑0495
Corporation Tax Credits — Converting a C Corporation to an S Corporation 150‑314‑0497
Corporation Tax Credits — Converting an S Corporation to a C Corporation 150‑314‑0510
Definitions for Composite Tax Returns and Pass-through Entity Withholding 150‑314‑0515
Oregon Composite Tax Return 150‑314‑0520
Pass-through Entity Withholding Requirements 150‑314‑0525
Exceptions to Pass-through Entity Withholding Requirements 150‑314‑0530
Divulging Particulars of Returns and Reports Prohibited 150‑314‑0535
Information That May Be Furnished 150‑314‑0540
Rewards for Information 150‑314‑0545
Combat Zone Benefits 150‑314‑0733
Partnership Pays Election After Federal Centralized Partnership Audit Adjustments
Last Updated

Jun. 8, 2021

Rule 150-314-0205’s source at or​.us