S Corp Election Deadline: How and When to File Form 2553

For an existing business on a calendar year, the S Corp election deadline is March 15. If you file Form 2553 by then, your election can take effect January 1 of the same year. For a new business, however, the clock starts on the first day of its first tax year, not January 1.

This guide explains how the deadline works, how to complete and file Form 2553, what happens after you file, and what to do if you missed the window.

When is the S Corp election deadline?

The IRS requires you to file Form 2553 no more than 2 months and 15 days after the beginning of the tax year you want the election to cover. Alternatively, you can file any time during the tax year before it (IRS Form 2553 instructions). When the deadline falls on a weekend or federal holiday, it generally moves to the next business day.

To keep the election deadline and your other key filing dates in one place, download Collective’s free tax calendar.

For an existing business

If your LLC has already been operating for a full tax year, the math is straightforward. For a calendar-year business, the deadline is March 15 for an election that starts January 1. In addition, you can file at any point during the current year to set a January 1 effective date for next year.

Already past March 15? Our guide to switching to an S Corp mid-year walks through your options for the current year.

For a new business

A newly formed LLC or corporation starts its first tax year on the earliest of three dates: when it first has owners, when it first has assets, or when it begins doing business. The 2-month-and-15-day window then runs from that date. As a result, a business formed mid-year can elect S Corp status for its very first tax year, as long as it files within that window. Keep in mind that a new business can’t file before its first tax year begins.

Here’s how the deadline works in practice, using examples from the IRS instructions:

If you formed your LLC late in the year, our guide to forming an LLC or S Corp at year-end covers whether the timing still makes sense.

What Form 2553 is and who files it

Form 2553, “Election by a Small Business Corporation,” is the one-time form that asks the IRS to tax your business as an S Corp. Eligible LLCs and corporations file it once; after that, the election stays in place until you revoke it or it ends. An LLC that files a valid Form 2553 generally doesn’t need a separate entity classification form, because the IRS treats it as a corporation from the election’s effective date.

Before you file, make sure the election fits your business. If you’re still deciding, see what an S Corp is and whether an S Corp is worth it. If tax savings are the main motivator, the election makes sense when the savings potential is greater than the cost of the extra work, including payroll, bookkeeping and a business tax return.

How to complete Form 2553

For most solopreneurs, Form 2553 comes down to one page, Part I. Here’s what it asks for.

Business details and effective date

• Name and address: Use your LLC’s legal name exactly as it appears on your formation documents and IRS records.
• EIN: Enter your business’s EIN. If you’ve applied but haven’t received it yet, the instructions let you write “Applied For” and the application date.
• Effective date (item E): Enter the first day you want the election to apply. For an existing calendar-year business, that’s usually January 1. For a new business, it’s the start of its first tax year.
• Tax year (item F): Most solopreneurs choose a calendar year. Choosing a fiscal year instead requires Part II.

Signatures and owner consents

An authorized officer signs the form, and every owner consents in the shareholder section. As of 2026, a wet signature is required on this specific tax form and the IRS will reject elections made with digital signatures. In addition, if an owner’s spouse has a community property interest in the business, that spouse also needs to consent. If you file after your effective date, anyone who owned the business at any point between that date and the filing date must consent, too.

Parts II through IV

Most solopreneurs can skip the rest. Part II applies only if you request a fiscal tax year, and Parts III and IV cover certain trusts and late entity classification elections.

How to file Form 2553 and what happens next

The IRS doesn’t charge a fee to file Form 2553. To submit it, mail or fax the form to the IRS service center listed in the instructions for your state. Then, keep proof that you filed, such as a certified mail receipt or fax confirmation, along with a copy of the signed form.

After you file, the IRS generally responds within 60 days. If you don’t hear back within 2 months, the IRS instructs filers to call the listed phone number to follow up. Once your acceptance letter arrives, keep it with your permanent business records.

Meanwhile, don’t wait for that letter to start operating as an S Corp. From your effective date forward, you need to run payroll and pay yourself a reasonable salary, keep S Corp-ready books, and plan for your first S Corp business tax return. For the full setup, see how to convert an LLC to an S Corp and our S Corp payroll guide.

What if you missed the S Corp election deadline?

Missing March 15 doesn’t always mean waiting a year. Instead, you have two main paths.

Request late election relief

Under Rev. Proc. 2013-30, the IRS can accept a late election if you meet its requirements. In general:

• Your business intended to be an S Corp and missed qualifying only because the election was late.
• You have reasonable cause for filing late, which you explain on the form or an attached statement.
• You and your business reported income consistently with S Corp status.
• You request relief within 3 years and 75 days of the intended effective date.

To request relief, complete these additional parts of Form 2553:

• Page 1, top margin: Write “FILED PURSUANT TO REV. PROC. 2013-30.”
• Page 1, line I: Explain your reasonable cause for filing late and the steps you took to correct it once you found the issue. Alternatively, you can attach a separate statement.
• Page 2, shareholder consents: Every owner signs the consent statement. For a late election, that signature also declares that each owner reported income consistently with S Corp status for the years involved.

You can file the form on its own or, in some cases, attach it to your S Corp business tax return.

Keep in mind that late relief comes with catch-up work. You may need to run payroll for the backdated period and rebuild your books to S Corp standards from the effective date. For a deeper look, see switching to an S Corp mid-year, retroactive S Corp elections, or our recap of the late S Corp election webinar.

Elect for next year instead

Alternatively, you can file Form 2553 now with a January 1 effective date for next year. As a result, you avoid catch-up work and can use the rest of the year to set up payroll and bookkeeping before the election starts.

To compare a timely election, late relief and a future effective date side by side, see switching to an S Corp mid-year.

How states handle the S Corp election

Form 2553 is a federal filing, so your state may have its own requirements. Most states follow the federal election automatically. However, some require a separate state election or form, and a few states and cities don’t recognize S Corp status at all.

In addition, states vary on which business returns they require, what fees or entity-level taxes apply, and how you register for state payroll accounts. Before you file, check your state’s rules with your state tax agency or a local tax professional. For state-specific detail, see Collective’s comparisons for California, New York, New York City, Texas, Florida and Georgia.

Common Form 2553 mistakes to avoid

Small errors can delay your election or, in some cases, make it invalid. Watch for these:

1. Using an electronic or typed signature. Sign Form 2553 by hand, with a wet ink signature, for both the officer signature and every owner’s consent. Electronic or typed signatures are one of the most common reasons S Corp elections get delayed or rejected.
2. Filing too late, or too early. Missing the 2-month-and-15-day window pushes the election to the following year unless you qualify for relief. Similarly, a new business can’t file before its first tax year begins.
3. Missing a signature or consent. An unsigned form doesn’t count as timely, and every required owner must consent.
4. Mismatched business details. A name or EIN that doesn’t match IRS records can slow processing.
5. Choosing the wrong effective date. For a new business, the effective date should match the start of its first tax year, not necessarily January 1.
6. Not keeping proof of filing. Without a certified mail receipt or fax confirmation, it’s harder to show you filed on time.
7. Waiting on the IRS to start payroll. Your S Corp obligations begin on the effective date, so payroll should start then, too.

Questions about the S Corp election deadline

For more, our S Corp FAQ answers 50 of the most common questions.

Do I need a new EIN to file Form 2553?

No. Your LLC keeps its existing EIN when it elects S Corp status.

Can a single-member LLC file Form 2553?

Yes. A single-member LLC can elect S Corp status, as long as it and its owner meet the IRS eligibility rules. In fact, many S Corps are one-person businesses.

What happens if the IRS doesn’t accept my S Corp election?

The IRS sends a letter explaining why it didn’t accept the election. In many cases, the fix is correcting the form, such as adding a missing signature or consent, and refiling. However, if the correction pushes you past the deadline, you may need to request late election relief.

File on time, with a plan for what comes next

Ultimately, the S Corp election comes down to timing: file Form 2553 within the window for the year you want, with every required signature, and keep proof that you filed. After that, the real work begins, from running payroll to keeping S Corp-ready books.

Generally, businesses of all types can elect S Corp status, as long as they meet the eligibility rules. Collective is built specifically for single-owner businesses, handling the S Corp election along with payroll, bookkeeping and tax filings for Business-of-One owners. Learn more about Collective.

This content is for educational purposes only and does not constitute legal, financial, or tax advice.