S-Corp Election in Oregon (Form 2553) (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

You make an S-corp election in Oregon by filing IRS Form 2553 no later than 2 months and 15 days after the start of the tax year the election should take effect. Oregon follows the federal election automatically — there is no separate state form — but the S corporation still files Oregon Form OR-20-S and owes at least the $150 corporation minimum excise tax.

What an S-Corp Election Is

An "S corporation" is not a type of entity you form with the state — it is a federal tax election. You first have a corporation or a limited liability company, then you ask the IRS to tax it under Subchapter S of the Internal Revenue Code. Making the election changes how profits are taxed: instead of the entity paying corporate income tax (a C corporation) or the owner paying self-employment tax on all profit (a default LLC), income passes through to owners, who can be paid a salary plus distributions. For the broader comparison, see S-Corp vs LLC and our business tax hub.

The election is made on IRS Form 2553. Every shareholder (or LLC member) must consent. Because the S election is federal, the same Form 2553 works whether your entity is organized in Oregon or another state. Oregon's role is limited: it recognizes the federal election and taxes the entity as an S corporation for state purposes. This guide explains eligibility, the deadline, and the Oregon obligations that continue after you elect, including the minimum excise tax and the separate Corporate Activity Tax.

It helps to understand what you are electing away from. By default, a single-member LLC is a disregarded entity and a multi-member LLC is a partnership, so all net profit is subject to self-employment tax on the owners' returns. A corporation that makes no election is a C corporation, taxed at the entity level and again when profits are distributed as dividends — the classic "double taxation." The S election is the middle path: a single layer of federal tax, income passing through to owners, and the ability to characterize part of an owner-employee's return as wages and part as distributions. That distinction is where the potential employment-tax savings comes from, and it is the reason owners weigh the extra payroll and filing work.

Eligibility Requirements for S-Corp Status

To qualify for an S election, the entity must be a domestic corporation or LLC and meet strict shareholder rules. It may have no more than 100 shareholders, and all shareholders must be eligible — generally U.S. citizens or resident individuals, certain trusts, and estates. It may not have nonresident alien shareholders, and it may have only one class of stock (differences in voting rights are allowed, but not differences in distribution or liquidation rights). Partnerships and corporations generally cannot be shareholders.

An LLC can elect S status if it meets these tests; the check-the-box rules treat the Form 2553 as also electing corporate classification, so a separate Form 8832 is usually not required. Before electing, confirm your ownership structure fits the rules, and make sure your entity is in good standing with the Oregon Secretary of State Corporation Division. You can verify status with the Oregon business entity search and review operating agreement mechanics if you own the business alone. New filers can start with how to form an LLC in Oregon.

How to Make the Election, Step by Step

1. Confirm eligibility. Check the shareholder count, eligible-owner, and one-class-of-stock tests above so the IRS does not reject the election.
2. Get an EIN. The entity needs a federal EIN before filing; the number and entity details go on Form 2553.
3. Complete and file Form 2553. Enter the effective date, the tax year, and every shareholder's name, ownership, and signed consent. File by mail or fax to the IRS service center for your state within the deadline.
4. Address Oregon treatment. No separate Oregon election is needed. Going forward, file Oregon Form OR-20-S, pay at least the $150 minimum excise tax, and keep the entity's annual report current with the registered agent on file.
5. Set up payroll. Put owner-employees on payroll at a reasonable salary, withhold and remit employment taxes, and document how distributions are handled.

Keep a copy of the accepted election (the IRS sends a CP261 notice) with your records. If you missed the deadline, the IRS provides late-election relief under Revenue Procedure 2013-30 when you had reasonable cause and have otherwise acted as an S corporation.

The Form 2553 Deadline

Timing is the most common trap. To take effect for the current tax year, Form 2553 must be filed no later than 2 months and 15 days after the beginning of that tax year. For a calendar-year business starting January 1, that puts the deadline around March 15. You may also file at any time during the preceding tax year for an election effective the following year. A newly formed entity's tax year begins when it first has shareholders, acquires assets, or begins doing business — whichever is earliest — so new owners should calendar the deadline immediately after formation.

Miss the window and the entity is taxed under its default rules for the year unless it qualifies for relief. Late-election relief lets many businesses still obtain the intended effective date by attaching a reasonable-cause statement to a properly completed Form 2553. Because the consequences of a rejected or late election are real, confirm the current instructions on the IRS Form 2553 page before filing.

Oregon Tax Treatment of an S Corporation

Oregon conforms to the federal S election: an entity with a valid federal S election is treated as an S corporation for Oregon tax purposes, with no separate state election form. The S corporation files Oregon Form OR-20-S with the Department of Revenue and owes at least the Oregon corporation minimum excise tax of $150. Income then passes through to shareholders, who report their shares on their own Oregon personal income tax returns. Resident shareholders pay Oregon tax on their full share; nonresident shareholders are taxed on their Oregon-source share, and the S corporation may have withholding or estimated-payment duties for them.

A separate tax can also apply. The Oregon Corporate Activity Tax (CAT) is not an income tax — it is a tax on Oregon commercial activity, and it generally applies only to businesses with more than $1 million in Oregon commercial activity. An S corporation with high Oregon receipts may owe CAT in addition to filing OR-20-S. Oregon also offers a pass-through entity elective (PTE-E) tax that some owners use as a workaround to the federal cap on state-and-local-tax deductions. See Oregon LLC tax filing and Oregon LLC cost for the entity-level fees, and confirm current thresholds on the Department of Revenue pages before filing.

Reasonable Salary and Payroll Obligations

The tax advantage of an S corporation comes from splitting an owner-employee's pay between a salary and distributions. Only the salary is subject to Social Security and Medicare (payroll) taxes; distributions are not subject to self-employment tax. To prevent abuse, the IRS requires that S-corporation shareholder-employees be paid reasonable compensation for the services they perform before taking distributions. Paying an artificially low salary to avoid payroll tax is a frequent audit target.

Practically, that means running real payroll: registering as an employer, withholding income and FICA taxes, filing federal Forms 941 and 940, issuing a W-2, and meeting Oregon withholding requirements. These added costs are why an S election usually makes sense only once profits comfortably exceed a reasonable salary. Use our self-employment tax calculator to model the break-even, and compare with a plain Oregon LLC before you elect. As a rough guide, many advisors want net profit well above a market salary before the payroll and filing overhead pays for itself, and clean records protect the election if the IRS reviews compensation. If you later wind the business down, see how to dissolve an LLC in Oregon.

Frequently Asked Questions

Does Oregon require a separate state S-corp election?

No. Oregon automatically recognizes a corporation or LLC that has a valid federal S election. There is no separate Oregon S-election form; the entity files Oregon Form OR-20-S with the Department of Revenue as an S corporation for state purposes.

What is the deadline to file Form 2553 for an Oregon business?

File no later than two months and 15 days after the beginning of the tax year the election should take effect, or any time during the preceding tax year. Late elections may qualify for relief under Revenue Procedure 2013-30.

Does an Oregon S corporation still owe a minimum tax?

Yes. An S corporation files Form OR-20-S and owes at least the Oregon corporation minimum excise tax of $150. Pass-through income is then taxed to shareholders on their Oregon personal income tax returns.

What is the Oregon Corporate Activity Tax?

The Corporate Activity Tax is a separate tax on Oregon commercial activity above $1 million, not an income tax. An S corporation with high Oregon receipts may owe CAT in addition to filing Form OR-20-S.

Can an Oregon LLC elect S-corp status?

Yes. An LLC that meets the eligibility rules can elect S-corporation taxation by filing Form 2553. The LLC keeps its Oregon legal form and its ongoing annual report obligations with the Secretary of State.

Related

• S-corp election (cluster hub)
• S-Corp vs LLC
• How to get an EIN
• Business tax basics
• How to form an LLC in Oregon
• S-corp election in Delaware (sibling)
• S-corp election in Massachusetts (sibling)

Sources

1. IRS — About Form 2553 (Election by a Small Business Corporation).
2. IRS — Instructions for Form 2553 (deadline, consents).
3. IRS — S Corporations (overview and eligibility).
4. IRS — S Corporation Employees, Shareholders and Officers (reasonable compensation).
5. IRS — About Form 1120-S (S corporation income tax return).
6. IRS — Get an Employer Identification Number.
7. IRS — Rev. Proc. 2013-30 (late S-election relief).
8. Oregon Department of Revenue — S Corporation / Form OR-20-S.
9. Oregon Department of Revenue — Corporation Minimum Excise Tax ($150).
10. Oregon Department of Revenue — Corporate Activity Tax (CAT).
11. Oregon Department of Revenue — Pass-Through Entity Elective (PTE-E) Tax.
12. Oregon Secretary of State — Corporation Division — register a business.
13. Oregon Revised Statutes — ORS Chapter 314 (income taxation, pass-through).
14. Cornell LII — 26 U.S.C. § 1361 (S corporation defined).
15. Cornell LII — 26 U.S.C. § 1362 (election, revocation, termination).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the IRS and the Oregon Department of Revenue and Secretary of State before acting.