Oregon LLC Tax Guide — Complete Overview

Understanding your tax obligations as an Oregon LLC owner is essential for compliance and financial planning. Oregon's tax landscape is unique: the state has no sales tax (one of only five states), but does impose a personal income tax with rates up to 9.9% and a Corporate Activity Tax (CAT) on higher-revenue businesses. This page covers all tax obligations for Oregon LLCs. For formation, see our Oregon LLC guide.

Oregon LLC Tax Summary

How Oregon LLCs Are Taxed by Default

Oregon LLCs are "pass-through" entities by default — the LLC itself does not pay income tax. Instead:

• Single-member LLCs: All income/loss flows to the member's Oregon personal income tax return (Form OR-40). Reported on federal Schedule C, then carried to the Oregon return.
• Multi-member LLCs: The LLC files an informational federal return (Form 1065), issues K-1s to each member, and each member reports their share on their Oregon personal return.
• No entity-level Oregon income tax for pass-through LLCs — unless the LLC elects to be taxed as a C-corp.

This is governed by Oregon's conformity to federal partnership/disregarded entity classification rules.

Oregon State Income Tax (Members)

Oregon has a graduated personal income tax that applies to LLC income passing through to members:

For married filing jointly, brackets are approximately doubled. Oregon's top rate of 9.9% is among the highest in the nation. See our detailed state income tax page for filing procedures and strategies.

No Sales Tax — What This Means for Your LLC

Oregon is one of only five states (along with Montana, New Hampshire, Delaware, and Alaska at the state level) with zero sales tax. This means:

• You never collect, track, or remit sales tax on Oregon transactions
• No sales tax permit/registration is needed for Oregon sales
• Your retail prices are what customers actually pay — no tax added at checkout
• Significantly reduced compliance burden compared to states with sales tax

Important: If you sell to customers in OTHER states, you may still need to collect those states' sales taxes under economic nexus rules. Oregon's no-sales-tax advantage applies to transactions occurring in Oregon. See our detailed sales tax page for interstate implications.

Corporate Activity Tax (CAT)

The Oregon Corporate Activity Tax took effect in 2020 and applies to all business entities (including LLCs) with Oregon "commercial activity" exceeding $1 million:

• Tax rate: $250 flat + 0.57% of commercial activity over $1 million
• Commercial activity = gross revenue from Oregon customers (with limited subtractions for cost of goods sold or labor costs, capped at 35% of activity)
• Filing threshold: Must register with DOR if commercial activity exceeds $750,000; must file and pay if over $1 million
• Due date: April 15 (calendar year) or the 15th day of the 4th month after fiscal year end
• Estimated payments: Required quarterly if CAT liability exceeds $5,000

Most small LLCs won't owe CAT. It only kicks in at $1 million in Oregon commercial activity. But fast-growing e-commerce businesses, tech companies, and service firms should be aware of this threshold. See our detailed CAT guide.

Federal Tax Obligations

All Oregon LLCs have federal tax obligations regardless of state tax treatment:

• Single-member LLC: Report on Schedule C of Form 1040 (or Schedule E for rental income)
• Multi-member LLC: File Form 1065 (partnership return), issue K-1s to members
• S-corp election: File Form 1120-S, issue K-1s — members save self-employment tax on distributions
• C-corp election: File Form 1120 — double taxation but potential benefits for retained earnings

See our federal tax guide and tax elections page for details.

Estimated Tax Payments

If you expect to owe $1,000 or more in Oregon income tax, you must make quarterly estimated payments:

• Due dates: April 15, June 15, September 15, January 15
• Penalty for underpayment: Interest charges on each underpaid quarter
• Safe harbor: Pay 100% of prior year's Oregon tax liability (110% if income over $150K) to avoid penalties
• Payment method: Oregon Revenue Online at revenueonline.dor.oregon.gov

Local Taxes (Portland Metro / Multnomah County)

Oregon's no-income-tax-at-entity-level rule doesn't extend to some local jurisdictions:

• Multnomah County Business Income Tax: 2.0% on net income for businesses operating in Multnomah County (Portland area). Files on Form MCC-1.
• Metro Supportive Housing Tax: 1% on taxable income above $125,000 (single) / $200,000 (joint) for individuals in the Portland Metro boundary. Applies to LLC pass-through income if the member lives/works in the Metro district.
• Portland Arts Tax: $35/year flat tax per resident adult — not specific to LLCs but applies to Portland-resident members

Key Deadlines

FAQ

Does my Oregon LLC pay state income tax?

Not at the entity level (for pass-through LLCs). LLC income passes through to members, who pay Oregon personal income tax at rates from 4.75% to 9.9%. If the LLC elects C-corp taxation, it pays the corporate excise tax at 6.6%-7.6%.

What is the Corporate Activity Tax and does it affect my LLC?

The CAT is a separate tax on commercial activity (gross revenue from Oregon customers) over $1 million. Small LLCs under $1 million in Oregon revenue do not owe it. Above that threshold, the rate is $250 + 0.57% on activity over $1 million.

Since Oregon has no sales tax, do I have any collection obligations?

Not for Oregon sales. However, if you sell to customers in states that DO have sales tax, you may owe those states' sales taxes if you exceed their economic nexus thresholds (typically $100,000 in sales or 200 transactions per year in that state).

Can I reduce my Oregon tax burden by electing S-corp?

Potentially. S-corp election allows you to split income between salary (subject to self-employment tax) and distributions (not subject to self-employment tax), saving up to 15.3% on the distribution portion. However, you must pay yourself a "reasonable salary" and the S-corp must file its own tax return. See our tax elections guide.