Do You Need a New EIN After Electing S Corp Status?
You just elected S corp taxation for your LLC, and now a question pops up: does the IRS expect you to get a brand new EIN?
The short answer is no. Electing S corp status does not create a new business entity, so your existing EIN stays exactly the same.
This is one of the most common points of confusion in small business taxes. Here is the full explanation, plus the situations where a new EIN actually is required.
An S Corp Election Is a Tax Choice, Not a New Company
When your LLC elects S corp status, nothing changes at the state level. You still have the same LLC, the same articles of organization, and the same owners.
All that changes is how the IRS taxes the business. Instead of the default pass-through treatment, the LLC files Form 1120-S and its owners receive K-1s.
Because the legal entity is unchanged, the EIN attached to that entity does not change either. The IRS simply updates its records to reflect the new tax classification.
If you are still weighing the decision, our comparison of LLC versus S corp walks through which structure saves more in taxes at different income levels.
How the Election Actually Works
You make the election by filing Form 2553, Election by a Small Business Corporation, with the IRS. The form asks for your existing EIN right at the top.
That detail alone tells you the answer: the IRS expects you to already have an EIN and to keep using it. You do not apply for a new one as part of the election.
The deadline matters more than most owners realize. For a calendar year business, Form 2553 is generally due by March 15 of the year the election should take effect. Miss it and the election applies to the following year instead.
The IRS page for Form 2553 has the current form, instructions, and where to file based on your state.
For a complete line by line walkthrough, see our guide on how to elect S corp status for your LLC.
What Changes After the Election
Your EIN stays the same, but your filing obligations change. The business now files Form 1120-S each year by March 15 instead of reporting profit on Schedule C or Form 1065.
You also need to put yourself on payroll. S corp owners who work in the business must take a reasonable W-2 salary before taking distributions.
This is where many owners stumble. Our explainer on the S corp reasonable salary rule shows how the IRS evaluates what counts as reasonable.
Your state may also want to know about the election. Some states require a separate S corp election or impose their own entity level taxes, so check your state rules after the federal filing is accepted.
When You Actually Do Need a New EIN
The IRS requires a new EIN when the ownership or structure of the business changes. An S corp election is neither, which is why the number stays.
You would need a new EIN if you converted the LLC into a corporation at the state level. That creates a legally distinct entity, and distinct entities get distinct EINs.
A new EIN is also required if a sole proprietorship incorporates or forms a partnership, or if a partnership incorporates. Bankruptcy and certain ownership changes can trigger one as well.
Things that do not require a new EIN include changing the business name, changing the business address, or changing the responsible party. Those are handled with updated filings, not a new number. The rule of thumb is simple: new entity, new EIN; same entity, same EIN.
The LLC Taxed as S Corp Versus a Real S Corporation
This distinction trips up a lot of owners. An LLC that elects S corp taxation is still an LLC under state law. It is not a corporation.
A corporation that elects S corp status is a corporation under state law that chose pass-through taxation. Both file Form 1120-S, but their legal foundations differ.
Why does this matter for the EIN question? Because converting an LLC into an actual corporation is a structural change that needs a new EIN, while simply electing S corp tax treatment is not.
Our breakdown of the pros and cons of an LLC taxed as an S corp covers the real numbers behind this popular strategy.
The IRS S corporation page lists the eligibility requirements, including the 100 shareholder limit and the one class of stock rule.
Timing Strategy: When to File Form 2553
The election deadline shapes real decisions. For a calendar year business wanting S corp treatment this year, Form 2553 is due by March 15.
New businesses get a friendlier window. If you form the LLC early in the year, you have 2 months and 15 days from the start of the tax year, which for most new LLCs means plenty of time.
Many owners elect late in the prior year for a clean January 1 effective date. Filing in November or December for the coming year avoids mid year payroll headaches and split year accounting.
If you already missed the deadline, do not assume you are stuck. Late election relief under Revenue Procedure 2013-30 is routinely granted when you have reasonable cause and have acted consistently with S corp status.
One more timing consideration: estimated taxes. In your first S corp year, withholding from W-2 wages may not cover your total liability, especially if distributions are large. Review withholding mid year and make estimated payments if needed to avoid underpayment penalties.
Coordinate the election date with your payroll start date. Beginning wages in the same quarter the election takes effect keeps quarterly filings clean and avoids awkward stub periods.
What Else Changes Besides the Tax Return
The EIN stays the same, but the election ripples through how you run the business day to day. The biggest shift is payroll.
Owner employees must receive W-2 wages, which means setting up payroll withholding, filing quarterly Form 941, and issuing annual W-2s. Many owners outsource this to a payroll provider in the first S corp year.
Distributions work differently too. After paying the reasonable salary, remaining profit can be distributed without payroll taxes. Tracking salary versus distributions separately keeps you defensible in an audit.
State treatment deserves its own check. A handful of states do not fully follow the federal S election, and some impose entity level taxes on S corps. Confirm your state’s position before you count the savings.
Retirement planning also shifts. S corp owners can often contribute more to a Solo 401(k) than they could as sole proprietors at the same income, because contributions can be based on W-2 wages. Run the numbers with your accountant.
Watch: Filing Form 2553 Correctly
Frequently Asked Questions
Do I need a new EIN after electing S corp status?
No. The election changes only your tax classification, not your legal entity. Keep using the EIN you already have and enter it on Form 2553.
When is Form 2553 due?
For the election to take effect in the current tax year, file no later than 2 months and 15 days after the start of the tax year. For calendar year businesses that is March 15.
What if I miss the Form 2553 deadline?
You may still qualify for late election relief under IRS Revenue Procedure 2013-30 if you have reasonable cause. Otherwise the election takes effect the following tax year.
Does my state need a separate S corp election?
Some states do. A few require their own election form, and others tax S corps at the entity level regardless of the federal election. Check your state tax agency before assuming the federal filing covers everything.
Can I revoke the S corp election later?
Yes, with the consent of shareholders holding more than half the stock. After revocation you generally must wait five years before electing S corp status again.
Do I need an EIN before filing Form 2553?
Yes. Form 2553 requires an EIN, so apply for one first if you do not have it. The online IRS application issues it immediately.
