← Back to Calculator

Missed the S-Corp Election Deadline? Here's What to Do

Updated March 2026 · 6 min read

If you missed the March 15 deadline to elect S-Corp status for the current tax year, don't panic. The IRS provides a late election relief process that allows most small business owners to still make the election — in some cases up to 3 years and 75 days after the intended effective date.

Here's everything you need to know about your options for filing a late S-Corp election.

The Standard S-Corp Election Deadline

Under normal IRS rules, you must file Form 2553 (Election by a Small Business Corporation) no later than:

• 2 months and 15 days (75 days) after the beginning of the tax year you want the election to take effect, OR
• Any time during the preceding tax year

For calendar-year businesses (which is most LLCs), this means the deadline for a 2026 election was March 16, 2026 (March 15 fell on a Sunday). If you missed it, the standard path would be to wait and file for 2027 instead — but the IRS offers a much better alternative.

Late Election Relief Under Revenue Procedure 2013-30

IRS Revenue Procedure 2013-30 provides simplified late election relief for eligible businesses. This is the most common way business owners fix a missed deadline, and it doesn't require a private letter ruling (which can cost thousands).

Eligibility Requirements

To qualify for late relief, your business must meet ALL of the following conditions:

• The entity intended to be classified as an S-Corp as of the intended effective date
• The entity failed to qualify solely because the election was not timely filed
• The entity has reasonable cause for the late filing
• Less than 3 years and 75 days have passed since the intended effective date
• No inconsistent tax returns were filed (e.g., you didn't file as a C-Corp for years you meant to be an S-Corp)

The 3-Year-and-75-Day Window

This is the key detail most people miss: you don't just have a few months of grace period. The IRS allows late elections filed within 3 years and 75 days of the intended effective date. For a 2026 election (effective January 1, 2026), that means you have until approximately March 2029 to file late.

That said, the sooner you file, the better. Filing promptly strengthens your reasonable cause argument and reduces the complexity of amending any tax returns.

How to File a Late S-Corp Election

The process is similar to a timely filing, with one additional step:

1. Complete IRS Form 2553 — Fill it out exactly as you would for a timely election. Enter the intended effective date (usually January 1 of the desired year).
2. Write a reasonable cause statement — On the form or in an attached statement, explain why the election was late. Common reasons include: relied on a tax professional who failed to file, was unaware of the election requirement, or administrative oversight. The IRS is generally lenient with reasonable cause for small businesses.
3. Reference Rev. Proc. 2013-30 — Write at the top of Form 2553: "FILED PURSUANT TO REV. PROC. 2013-30"
4. Submit to the IRS — Fax or mail to the IRS service center for your state (the same location you'd send a timely election).

What Counts as "Reasonable Cause"?

The IRS accepts a wide range of explanations. Some common reasonable cause statements include:

• The taxpayer was unaware of the S-Corp election requirement
• The taxpayer relied on a tax advisor who failed to file the election
• The election was filed late due to an administrative error or oversight
• The taxpayer's CPA or attorney missed the filing deadline
• The taxpayer experienced a personal hardship that prevented timely filing

The statement doesn't need to be lengthy — a clear, honest explanation of 2-3 sentences is typically sufficient. The IRS approval rate for late elections under Rev. Proc. 2013-30 is very high.

What If You Don't Qualify for Late Relief?

In the rare case you don't qualify under Rev. Proc. 2013-30, you have two alternatives:

• File for the next tax year instead — You can file Form 2553 at any point during 2026 to elect S-Corp status effective January 1, 2027. This is the simplest fallback.
• Request a Private Letter Ruling (PLR) — For complex situations, you can request a ruling from the IRS, but this typically costs $3,000-$10,000+ in IRS fees plus professional fees. This is rarely necessary for simple late elections.

Planning Ahead: Don't Miss It Next Year

The S-Corp election deadline for the 2027 tax year will be approximately March 15, 2027. If you'd like to be reminded, check our S-Corp Election Deadline page for all key dates.

The best approach: calculate your potential savings now and file well ahead of the deadline. Our free calculator can show you exactly how much you'd save in 30 seconds.