Pass-Through Entity Income Tax

1. General Principles of Pass-Through Taxation

• Pass-through entities (PTEs) include partnerships, S corporations, LLCs taxed as partnerships or S corporations, and certain trusts. These entities generally do not pay income tax at the entity level. Instead, their income, deductions, credits, and other tax items "pass through" to the owners, who report and pay tax on their share of the entity’s income on their own tax returns .
• States vary widely in their treatment of PTEs. Some conform closely to federal flow-through principles, while others impose entity-level taxes or have unique rules for allocation, apportionment, and compliance .

2. State-Level Pass-Through Entity Taxes (PTETs)

• In response to the federal limitation on the state and local tax (SALT) deduction under IRC § 164(b)(6), many states have enacted elective entity-level income taxes on PTEs. These allow the entity to pay state income tax at the entity level, which is deductible for federal tax purposes, thereby circumventing the SALT cap for individual owners .

3. Elective Entity-Level Tax: Mechanics and Variations

• Election: The entity must affirmatively elect to be taxed at the entity level, usually on an annual basis. The election is often irrevocable for the year and binding on all owners (with some states allowing opt-outs for certain owners) .
• Eligible Entities: Typically, partnerships and S corporations may elect; some states restrict eligibility based on the type of owners (e.g., only individuals, not corporations) .
• Tax Base and Rate: The tax is generally imposed on the sum of the distributive or pro rata shares of income, gain, loss, or deduction attributable to the state. Tax rates vary by state and may change annually .
• Owner Credits: Owners are generally allowed a credit against their own state income tax for their share of the entity-level tax paid. The credit may be nonrefundable or refundable, and may be subject to carryforward provisions .
• Filing and Reporting: Electing entities must file a special return (e.g., MO-PTE in Missouri, OR-21 in Oregon, DR 0106 in Colorado) and issue K-1s or similar statements to owners showing their share of income and credits .

4. Owner Considerations

• Opt-In/Opt-Out: Some states allow individual owners to opt out of the entity-level tax, requiring them to file and pay tax directly. Others require the election to apply to all owners .
• Nonresident Owners: States may relieve nonresident owners of filing obligations if the entity pays the tax at the entity level, or may still require nonresident returns .
• Composite Returns and Withholding: States may allow or require composite returns (entity files and pays on behalf of consenting owners) or impose withholding obligations on the entity for nonresident owners .

5. Credits for Taxes Paid to Other States

• Many states allow owners a credit for their share of similar taxes paid to other states by the entity, subject to limitations and documentation requirements .

6. Conformity to Federal Rules

• Most states generally conform to federal rules for determining distributive/pro rata shares, character, and source of income, but may have specific modifications or anti-abuse provisions .

7. Planning and Compliance Issues

• The choice to elect entity-level taxation can have significant implications for owners, especially those in multiple states or with different types of owners (individuals, corporations, trusts).
• States may have unique rules for apportionment, allocation, and treatment of special allocations or tiered entities .
• Compliance is complex and requires careful attention to election deadlines, owner consents, reporting, and credit claims .

8. Jurisdictional and Nexus Issues

States may assert taxing jurisdiction over nonresident owners based solely on their ownership interest in a PTE doing business in the state, raising constitutional and practical questions 

Summary Table: Selected State PTET Features

State	Election	Eligible Entities	Tax Rate (2025)	Owner Credit	Owner Opt-Out	Nonresident Return
Missouri	Annual	Partnerships, S Corps	4.7%	Yes	Yes	Not required if only MO income
Oregon	Annual	Partnerships, S Corps (individual owners only)	9% up to $250k, 9.9% above	Yes (refundable)	All must consent	Required
Colorado	Annual	Partnerships, S Corps	4.40%	Yes (refundable)	No	Required