S Corp Election Deadline March 15, 2027: File Form 2553 Now

If your LLC runs on a calendar year and you want it taxed as an S corporation for 2027, the deadline to file Form 2553 is March 15, 2027. But here is the part most guides bury: you do not have to wait until March. The IRS lets you file any time during the tax year before the one you want the election to start — which means the window for 2027 is already open, right now, in November 2026. Filing early gets your acceptance letter back before January, gives you time to set up payroll properly, and keeps you out of the March rush when every accountant in the country is buried.

This is not a “file it and forget it” form, though. An S corp election only saves money above a certain profit level, it comes with payroll and a second tax return, and the “reasonable salary” rule is the most audited part of the whole arrangement. Below is the deadline math, the break-even table worked from real 2026 numbers, the filing steps, and the rescue route if you already missed a deadline.

The deadline, stated plainly

The IRS rule is short: file Form 2553 no more than 2 months and 15 days after the start of the tax year the election should take effect — or at any time during the tax year immediately before it. For a calendar-year business, 2 months and 15 days after January 1 lands on March 15. (Rho’s complete Form 2553 guide walks the same deadline math with worked examples.)

So for 2027 S corp treatment, you have two windows that lead to exactly the same result:

That last row is the expensive one. File on March 16 and you do not get a partial year of S corp treatment — the election slips a full year, to 2028, unless you qualify for the late-election relief explained near the end of this article.

One common mix-up to clear up: March 15 is the deadline for an existing business electing for the following year. A brand-new LLC plays by a different clock — 2 months and 15 days from the start of its first tax year, which begins on the earliest of the day it first has owners, first acquires assets, or starts doing business. Form an LLC and open its bank account with a first deposit on February 10, 2027, and your deadline to elect from day one is April 24, 2027 — not March 15. Form it in November 2026 and want S corp treatment from the start, and your window closes in late January 2027.

Why filing in November beats waiting until March

Most owners treat March 15 as the date to aim for. I think that is backwards, for four practical reasons:

1. The acceptance letter takes about 60 days. When the IRS accepts your election it sends a CP261 notice. File in mid-November and that letter usually lands in mid-January — before your first 2027 payroll run. File on March 14 and you are running payroll in January, February, and March on an election the IRS has not confirmed yet. It almost always works out, but you are building on an assumption instead of a letter.

2. Payroll needs setup time, and January is the worst month to do it. An S corp owner must be on payroll. That means choosing a payroll provider, getting an employer payroll account with your state, and setting up quarterly filings. Doing that in November, when your accountant actually answers the phone, beats doing it in the January crush.

3. You get a clean decision window. Filing now forces the real question — does this election save you money? — while there is still time to run the numbers with your CPA, rather than in a March panic where the answer is “just file it and hope.”

4. There is no downside to filing early. The election does not take effect until January 1, 2027 either way. Filing in November changes nothing about your 2026 taxes. It only moves the paperwork out of the busy season.

The math: when the election actually saves you money

Here is the whole reason the election exists. A single-member LLC taxed as a sole proprietorship pays self-employment tax — 15.3% — on its net profit. An S corp splits the same profit into two buckets: a W-2 salary, which carries payroll tax, and distributions, which do not carry self-employment tax at all. The savings live entirely in the gap between your profit and your salary.

The 2026 numbers, verified against IRS and SSA figures: self-employment tax is 15.3% — 12.4% Social Security plus 2.9% Medicare — applied to 92.35% of net earnings. The Social Security portion stops at the 2026 wage base of $184,500 (up from $176,100 in 2025); Medicare has no cap. On the S corp side, payroll tax on your salary runs at the same 15.3% combined rate (7.65% employee share, 7.65% employer share), but only on the salary — not on distributions.

Worked examples, using a $2,700-a-year compliance cost (payroll service plus the extra Form 1120-S preparation) as a realistic middle estimate:

Read that table twice, because it kills the most common piece of bad advice on the internet. At $40,000 of net profit, the election costs you money — the payroll and tax-prep overhead eats the entire saving and then some. Around $60,000 you are roughly at break-even. The election starts paying for itself clearly at about $75,000 to $100,000 of net profit, and the case gets stronger as profit rises. That matches what working CPAs say in practice: the commonly cited break-even band is roughly $50,000 to $80,000 in net profit, depending on your salary level and your local compliance costs.

Two honest footnotes on the math. First, the employer half of payroll tax (7.65% of your salary) is a deductible business expense, which trims the cost slightly in the S corp’s favor — the table above ignores that to keep the comparison conservative. Second, the election changes your Qualified Business Income deduction: for a sole proprietor it is calculated on net income, but for an S corp it is calculated on distributions only, not salary. A bigger salary shrinks your QBI deduction, so the saving is a little smaller than the simple table suggests. Run your own numbers with a CPA before you file — the direction is right, the exact dollars are yours.

The reasonable-salary rule is where people get hurt

The IRS does not let you pay yourself a $10,000 salary and take $90,000 in distributions. Your salary has to be “reasonable compensation” for the work you actually do — what a similar business would pay someone else to do your job. There is no IRS formula and no safe percentage, which is exactly why this is the most audited part of S corp taxation.

The cautionary tale every CPA knows is David Watson, a CPA in Iowa who paid himself a $24,000 salary while his S corp earned far more and took the rest as distributions. The IRS reclassified the distributions as wages, and the courts backed the IRS. The lesson is not that $24,000 is always too low — it is that the salary has to be defensible on its own facts.

What the IRS actually looks at, in practice:

• What the job pays in the open market. A freelance developer billing $150 an hour cannot credibly claim a $30,000 salary. Check Bureau of Labor Statistics wage data or salary surveys for your role and region, and keep the printout.
• Your training and experience. Ten years in the trade supports a higher salary than year one.
• What comparable businesses pay. If you hired someone to do your exact job, what would the offer letter say?
• The business’s own economics. A company earning $200,000 with one working owner looks very different from a company earning $60,000.
• How you document it. A written memo in your files — “salary set at $X based on [source], reviewed annually” — is worth more than a verbal shrug if questions ever come.

A practical approach many owners use: set the salary at roughly 50–60% of net profit for a solo service business, then sanity-check it against market wages for the role. If the market wage is higher than that percentage, use the market wage. And remember the salary is a floor you must defend, not a number to minimize — every dollar you shave off the salary to save 15.3% is a dollar the IRS can reclassify later, with penalties and interest attached.

How to file Form 2553, step by step

The form itself is short — two pages for most filers — but every line matters because a mistake can invalidate the election.

1. Confirm you are eligible. The business must be a domestic entity, have no more than 100 shareholders, have only eligible shareholders (individuals, certain trusts and estates — no partnerships, corporations, or nonresident aliens as shareholders), and have only one class of stock. An LLC with two members where one is a nonresident alien, for example, cannot elect.

2. Pick the effective date. For 2027 treatment, that is January 1, 2027. Put it on the form exactly.

3. Get every shareholder’s signature. Every person who owns stock on the date you file must sign the consent section. Miss one signature and the election is invalid. In community-property states, a spouse may also need to sign.

4. Choose the tax year. Most small businesses use the calendar year. Picking a fiscal year triggers extra requirements in Part II of the form — do not do it casually.

5. Mail or fax the original to the IRS service center for your state. The Form 2553 instructions list the center by state; for example, California filers send it to Ogden, Utah. The IRS wants the original, not a photocopy. There is no online filing for Form 2553.

6. Wait for the CP261, and keep proof you filed. The IRS usually processes the form within about 60 days. Keep a copy of the signed form and your fax confirmation or certified-mail receipt. If you file late and the IRS never sends the notice, that paper trail is your evidence.

One filing shortcut worth knowing: an LLC does not need to file Form 8832 first. A timely Form 2553 is treated as the LLC also electing to be taxed as a corporation, so one form does the whole job.

If you are already running an LLC and want the full comparison before you decide, our LLC vs S corp breakdown for freelancers walks through the same choice from the freelancer’s side, and how to pay yourself as an LLC owner covers the owner’s-draw mechanics you will be leaving behind.

Who should not elect — at least not yet

The election is a poor fit more often than the internet admits. Skip it, or wait a year, if any of these describe you:

• Your net profit is under about $60,000. The table above is blunt: at that level the compliance cost eats the saving. Spend the year growing the business instead.
• Your income is lumpy or falling. The election locks you into payroll every month, in good months and bad. A business that nets $120,000 one year and $45,000 the next gets the worst of both worlds.
• You are in a state that taxes S corps separately. California charges S corps a 1.5% tax on net income with an $800 minimum franchise tax; New York wants a separate Form CT-6. In those states the break-even profit level is higher — run state-specific numbers.
• You need every dollar of QBI deduction. If you are near the QBI income thresholds, shifting income from distributions to salary can shrink the deduction enough to erase the payroll-tax saving.
• You will not run payroll properly. Missing payroll tax deposits triggers penalties fast. If you will not use a payroll service, do not elect.

Missed the deadline? The late-election rescue still works

Missing March 15 is not the end of the story, thanks to Revenue Procedure 2013-30. The IRS will treat a late election as timely if four conditions hold: the business intended to be an S corp from the effective date, the failure was due to reasonable cause (not willful neglect), the business and all shareholders filed returns consistent with S corp status for the affected years, and the request comes within 3 years and 75 days of the intended effective date.

Practically, that means: write “FILED PURSUANT TO REV. PROC. 2013-30” at the top of Form 2553, attach a short statement explaining the reasonable cause — the explanations the IRS routinely accepts include relying on a tax professional who failed to file, and not knowing the election was a separate filing — and file it with your first Form 1120-S. There is no IRS fee for this relief. The expensive fallback, a private letter ruling, costs $12,600 and is only needed if you fall outside the Rev. Proc. 2013-30 conditions — for example, if you already filed a partnership or C corp return for the year in question.

The window is generous but not infinite. An election meant to start January 1, 2025 can still be rescued until roughly March 16, 2028. An election meant for January 1, 2024 closes around March 17, 2027 — just four months from now. If you meant to elect for a past year and never did, check the calendar before that window closes.

And one warning: the relief is for genuine mistakes, not retroactive tax planning. You cannot decide in 2027 that 2025 would have been a better S corp year and file for it. The IRS requires that you intended the election all along and behaved like an S corp — filing 1120-S returns and reporting K-1 income — in the meantime.

The decision, in one paragraph

If your calendar-year LLC will net roughly $75,000 or more in 2027, filing Form 2553 now — in November, while the window is open and your accountant has time — is one of the highest-value pieces of paperwork you will do all year: it can save several thousand dollars annually, it costs nothing to file early, and the acceptance letter will be in your hands before your first 2027 payroll run. If you will net less than that, the honest answer is to wait, grow the business, and revisit the election next November. Either way, the deadline is March 15, 2027 — and the smart move is to decide in November, not in March.

This article is general information about federal tax rules, not professional tax advice for your situation. Tax law changes, and the right entity choice depends on your numbers, your state, and your circumstances. Talk to a CPA or enrolled agent before filing Form 2553.

Frequently Asked Questions

What is the S corp election deadline for 2027?

For a calendar-year LLC or corporation, Form 2553 must be filed no later than March 15, 2027 — 2 months and 15 days after the tax year begins. You can also file any time during 2026, the year before the election takes effect. A new LLC’s deadline is 2 months and 15 days from the start of its first tax year instead.

Can I file Form 2553 in November 2026 for 2027?

Yes. The IRS accepts the election at any time during the tax year before the one it applies to, so filing in November or December 2026 for 2027 treatment is fully valid. Filing early is the better move: the CP261 acceptance notice usually arrives within about 60 days, so you will have it before your first 2027 payroll run.

How much profit do I need for an S corp election to save money?

Roughly $50,000 to $80,000 in annual net profit is the break-even band, depending on your salary and compliance costs. At $60,000 of net profit the election is about break-even; at $100,000 it saves roughly $3,000 a year after payroll and tax-prep costs; at $150,000 it saves roughly $7,000. Below $50,000, the election usually costs more than it saves.

What is a reasonable salary for an S corp owner?

There is no IRS formula. A reasonable salary is what you would pay someone else to do your job — based on market wages for the role, your experience, and your region. Many solo service businesses use roughly 50–60% of net profit as a starting point, then check it against salary data. Paying an artificially low salary is the most common way S corp owners get in trouble; the IRS can reclassify distributions as wages, with penalties and interest.

What happens if I miss the March 15 deadline?

The election takes effect the following year instead — unless you qualify for late-election relief under Revenue Procedure 2013-30. That relief lets you file up to 3 years and 75 days after the intended effective date, at no IRS fee, if you had reasonable cause and filed returns consistent with S corp status. Write “FILED PURSUANT TO REV. PROC. 2013-30” at the top of Form 2553 and attach a reasonable-cause statement.

Do I need to file Form 8832 before Form 2553?

No. An LLC that timely files Form 2553 is treated as having also elected corporate tax classification, so Form 8832 is unnecessary. One form does the whole job.