Does Oregon recognize the federal S-corporation election?

Yes. Oregon follows the federal S election, and no separate state election form is required — filing federal Form 2553 with the IRS is enough. The corporation does still file Form OR-20-S (Oregon S Corporation Tax Return).

Which Oregon return does an S corporation file?

Form OR-20-S (Oregon S Corporation Tax Return).

S-corp election · OR

Oregon S-Corporation Election

By Edmond Hui · Facts verified July 29, 2026 against primary state sources

Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.

Oregon follows the federal S election. Filing IRS Form 2553 is enough — there is no separate Oregon election form. Oregon is one of 43 states that follow the federal election with no state form of their own.

State treatmentFollows the federal election

Separate state formNot required

State corporate income taxYes

Does Oregon recognize the federal S election?

State treatment of the S election

Follows the federal election	Yes
Separate state election form	None required
State return	Form OR-20-S (Oregon S Corporation Tax Return)

No separate state election to file: the federal election on IRS Form 2553 carries over. That is the election only — the corporation still files Form OR-20-S. Of the 50 states, 43 follow the federal election with no state form of their own, and 1 more — New York — recognizes S status but requires an election of its own as well.

What an S corporation still owes Oregon

Yes, a floor applies. S corporations that are excise-tax filers pay the $150 minimum excise tax whether or not they are profitable (income-tax filers pay calculated tax only, no minimum). S corporations are also subject to the Corporate Activity Tax if their Oregon commercial activity exceeds $1,000,000.

Franchise or gross-receipts tax

Two separate items. (1) Corporate minimum excise tax (ORS 317.090), tiered on Oregon sales of the filing group, C corporations only: under $500,000 = $150; $500,000-$999,999 = $500; $1M-$1.99M = $1,000; $2M-$2.99M = $1,500; $3M-$4.99M = $2,000; $5M-$6.99M = $4,000; $7M-$9.99M = $7,500; $10M-$24.99M = $15,000; $25M-$49.99M = $30,000; $50M-$74.99M = $50,000; $75M-$99.99M = $75,000; $100M and above = $100,000. S corporations pay a flat $150 minimum excise tax. (2) Corporate Activity Tax (CAT, ORS ch. 317A), a separate gross-receipts tax: $250 plus 0.57% of taxable Oregon commercial activity above $1,000,000; registration required within 30 days of exceeding $750,000 of Oregon commercial activity; return required only above $1,000,000.

Oregon corporation vs Oregon LLC

State filing charges only. Corporate income tax and franchise tax are excluded because both depend on income or net worth, so no flat figure exists for either entity.

	Corporation	LLC
Formation filing fee	$100	$100
Report cadence	Every year	Every year
Report fee	$100	$100
Entity-level tax on the LLC side	—	Corporate Activity Tax (CAT)

Both entities cost $100 to file in Oregon, so the filing fee is not a reason to pick one over the other.

Full Oregon LLC cost breakdown · LLC vs C-corp explained · LLC vs S-corp explained

How Oregon compares

State treatment of the federal S election	States
Follows the federal election, no state form needed	43
No corporate income tax, so no state election exists	4
Has a corporate income tax and does not follow the election — the corporation is taxed like a C corporation	2
Follow the election but still impose some entity-level tax on the S corporation — California, Illinois, New York, Massachusetts and Delaware among them	—
Require a separate state election form as well	1

Compare all 50 states · LLC vs S-corp · S-corp salary and savings calculator

Frequently Asked Questions

: Yes. Oregon follows the federal S election, and no separate state election form is required — filing federal Form 2553 with the IRS is enough. The corporation does still file Form OR-20-S (Oregon S Corporation Tax Return).
: Yes, a floor applies. S corporations that are excise-tax filers pay the $150 minimum excise tax whether or not they are profitable (income-tax filers pay calculated tax only, no minimum). S corporations are also subject to the Corporate Activity Tax if their Oregon commercial activity exceeds $1,000,000.
: Form OR-20-S (Oregon S Corporation Tax Return).

Where these numbers come from

This page covers how Oregon treats the federal S-corporation election and what an S corporation still owes the state. Every figure was checked against Oregon's own published sources on July 29, 2026— the state business filing agency's fee schedule, the governing statute, and where a state tax applies, the state Department of Revenue. Commercial formation-service pages were used as leads only and are never cited. Anything the review could not confirm from an official source is left blank on this page rather than filled with an estimate.

Corporate income tax and franchise tax are quoted as the state publishes them, as rate schedules and thresholds, and are excluded from every dollar total here. They depend on income or net worth, so there is no flat figure that would be true for every corporation.

Primary sources: