Missed the S corp deadline? How late election relief works

The normal deadline, and what missing it means

The Form 2553 instructions say an election can be made at any time during the tax year before it is to take effect, or no more than 2 months and 15 days after the beginning of the tax year it is to take effect. For a calendar-year business that wants S status from 1 January 2027, that means filing by 15 March 2027.

A late election does not simply fail. The instructions say a late election generally takes effect for the tax year following the one entered on line E of the form. So an owner who meant to be an S corporation for 2026 and files in, say, June 2026 without asking for relief would generally become one for 2027 instead, and 2026 would be taxed the old way.

Relief when there was reasonable cause

Relief is available if the business can show the failure to file on time was due to reasonable cause. The explanation goes on line I of Form 2553 or on an attached statement, and it has to cover two things: why the form was not filed before the due date, and the diligent steps taken to correct the mistake once it was discovered.

1. 1.The corporation intended to be an S corporation from the date entered on line E.
2. 2.It fails to qualify from that date solely because Form 2553 was not filed by its due date.
3. 3.It had reasonable cause for the late filing and acted diligently once the mistake was discovered.
4. 4.Form 2553 is filed within 3 years and 75 days of the line E date.
5. 5.Every person who was a shareholder between the line E date and the filing date provides a statement that they reported their income consistently with S status for the affected years. Signing the shareholder's consent statement in column K of the form meets this requirement.

The second route, after 3 years and 75 days

A corporation that meets the first three conditions but is past the 3-years-and-75-days window can still ask for relief on Form 2553 if all of the following are true:

• The corporation and all its shareholders reported their income consistently with S status for the intended first year and every year since.
• At least 6 months have passed since the corporation filed its return for the first year it intended to be an S corporation.
• Neither the corporation nor any shareholder was notified by the IRS of a problem with its S status within 6 months of the date the first Form 1120-S was timely filed.

Where neither route fits, the instructions say the corporation generally has to request a private letter ruling and pay a user fee. Revenue Procedure 2013-30 itself states that user fees do not apply to corrective actions under that revenue procedure.

LLCs that meant to be S corporations

Most small S corporations in Massachusetts are LLCs that elected S status. An LLC that files a timely Form 2553 is treated as a corporation from the effective date of the election and does not need to file Form 8832 separately.

When the Form 2553 is late, the LLC has effectively missed two elections: the classification as a corporation and the S election. The instructions provide relief for both at once, within 3 years and 75 days of the line E date, if the entity is an eligible entity, intended to be an S corporation from that date, failed to qualify as a corporation solely because the classification election was not timely, and shows reasonable cause. The same consistency statements from shareholders apply.

How the late form is marked and filed

Revenue Procedure 2013-30 is specific about presentation. The details below come from the revenue procedure and the Form 2553 instructions.

• Write "FILED PURSUANT TO REV. PROC. 2013-30" at the top of the form.
• Include the reasonable-cause and diligence explanation on line I or an attached statement.
• Collect the shareholder consent statements covering everyone who owned shares during the affected period.
• Send the original form to the IRS service center listed in the instructions, or fax it; if faxed, keep the original with the corporation's permanent records.
• Where the corporation has filed every Form 1120-S since the intended effective date, the revenue procedure allows the election form to be attached to the current-year Form 1120-S, if that return is filed within 3 years and 75 days of the effective date.
• Keep proof of when and how it was sent. The IRS generally responds within 60 days; if you hear nothing within 2 months, the instructions say to follow up by calling 1-800-829-4933.

An illustrative timeline

Illustrative dates for a calendar-year LLC that intends S status from 1 January 2027. Count your own dates precisely from the date on line E.

What happens to the returns already filed

Relief requires that the shareholders reported consistently with S status. That condition is easy to meet when the business already filed Forms 1120-S and issued K-1s, believing the election was in place, and only later discovered the election was never accepted. It is harder when the business kept filing as a sole proprietorship or partnership. In that case the returns for the affected years may need to be revisited before relief can be requested, and that is a facts question worth working through before anything is filed.

Penalties for late S corporation returns are separate from the election itself. The Form 1120-S instructions set a late-filing penalty per shareholder per month, up to 12 months: $255 in the 2025 instructions, and $260 for returns required to be filed in 2027.

Massachusetts follows the federal result

The Department of Revenue says entities that are S corporations for federal purposes are S corporations for Massachusetts purposes, with an exception for security corporations. There is no separate Massachusetts election to chase. Once federal relief is granted, the Massachusetts side follows: the business files Form 355S with Schedule S and SK-1s, and it owes at least the $456 minimum excise for each year it is an S corporation. If Massachusetts returns for the affected years were filed on a different basis, they need to line up with the federal outcome.

Nothing on this page predicts whether the IRS will grant relief in a particular case. Reasonable cause depends on the facts, and the explanation should be accurate and specific rather than generic.

Where we come in

We prepare Form 1120-S and Form 355S, and we can go through the paperwork trail with you: what was filed, when, on what basis, and which route, if any, fits. We explain IRS notices about the election in plain terms. We give you a scope and a price in writing before anything starts.