S-Corp Election Timing: Form 2553 Deadlines, Late Elections, and When to Wait
The S-Corp election is not automatic. A business owner must file Form 2553 (Election by a Small Business Corporation) with the IRS to elect S-Corp status. The timing of the filing determines when the election takes effect, and missing the deadline can delay the election by an entire year (costing thousands in unnecessary self-employment tax). Understanding the deadlines and the late-election relief options is essential for business owners considering the S-Corp structure.
For an existing business (already operating as a sole proprietor or single-member LLC), Form 2553 must be filed by March 15 of the year the election is to take effect. An election filed by March 15, 2026 is effective for the entire 2026 tax year. An election filed on March 16, 2026 is effective for the 2027 tax year (unless late-election relief is granted). For a newly formed entity, Form 2553 must be filed within 2 months and 15 days (75 days) of the entity’s formation date. Late-election relief is available under Rev. Proc. 2013-30 if the entity had reasonable cause for missing the deadline, the election is filed within 3 years and 75 days of the intended effective date, and the entity has been reporting consistently as an S-Corp. The most common reasonable cause: the business owner was unaware of the requirement to file Form 2553, or relied on a tax preparer who failed to file it.
What are the exact deadlines?
Existing business electing S-Corp for the current year:
- File Form 2553 by March 15 of the current year
- The election is effective January 1 of that year
- Example: Form 2553 filed February 20, 2026 = effective January 1, 2026
New LLC formed during the current year:
- File Form 2553 within 75 days of the LLC formation date
- Example: LLC formed April 10, 2026. Deadline: June 24, 2026. Election effective April 10, 2026.
Election for next year:
- File Form 2553 anytime from January 1 to March 15 of the next year
- OR file anytime after March 15 of the current year (the election automatically applies to the next year)
What if the deadline is missed?
When should a business wait to elect S-Corp?
Not every business should elect S-Corp immediately. Reasons to wait:
Net profit is too low. The S-Corp saves SE tax, but the S-Corp has costs (payroll processing, corporate tax return, reasonable salary documentation). Below $50,000-$60,000 in net profit, the costs may exceed the savings.
The business is new and income is uncertain. A new business in its first year may not know whether income will be high enough to justify S-Corp status. Electing S-Corp and then revoking is possible but messy.
The business has losses. S-Corp losses are limited by the shareholder’s basis (stock basis + loan basis). A sole proprietor can deduct business losses against other income without this limitation. If the business expects losses in Year 1, staying as a sole proprietor allows the full loss deduction.
The Business Assessment is a fixed $250. You get a written, CPA-reviewed S-Corp analysis including the optimal election timing, the salary calculation, and the breakeven analysis for your business.
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Yarik Yarosh, CPA. "S-Corp Election Timing: Form 2553 Deadlines, Late Elections, and When to Wait." Blue Cloud CPA, September 5, 2026. https://bluecloudcpa.com/guides/scorp-election-timing-form-2553
This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.