How the S-Corp Election Actually Works (and When It's Worth It)

#What the S-corp election actually does

By default, single-member LLCs are taxed as sole proprietorships. Multi-member LLCs are taxed as partnerships. Both pass through every dollar of business income to the owner’s personal return. Every dollar of that net income gets hit with the 15.3% self-employment (SE) tax (12.4% Social Security + 2.9% Medicare, with limits).

When you file Form 2553 to elect S-corporation tax treatment, the math changes. The business pays you a salary. That salary is subject to payroll tax, the same 15.3% effective rate, split between employer and employee. Anything above the salary comes out as a distribution. Distributions are not subject to SE tax.

It is not the whole picture. Moving income from a sole proprietorship to wages also lowers the QBI deduction. Some states tax S-corps. These numbers are before other costs. A salary also lowers your QBI deduction, and some states tax S-corps. We model your full picture before you decide. The wider the gap between net business income and reasonable salary, the bigger the S-corp savings.

#When the math works

The break-even threshold is typically around $80K–$100K of net business income. Below that, the cost of running payroll (Gusto + accountant fees + state unemployment registration) eats up most of the SE tax savings. Savings rise until your salary reaches the Social Security limit, then they grow slowly.

Rough math at a few income levels (gross payroll-tax savings before costs, income-tax effects and Additional Medicare; assumes reasonable comp per row):

These are rough. The actual reasonable comp number is what drives the savings. Too low, and you create IRS audit risk. Too high, and you are paying SE tax you did not need to.

#How to elect: Form 2553

Form 2553 is one page. It tells the IRS you want S-corporation tax treatment. The filing rules:

1. New entities: file within 2 months and 15 days of formation
2. Existing LLCs: file by March 15 of the tax year you want the election effective for
3. Late election (Section 1362(b)(5)): file up to 3 years and 75 days after the intended effective date, with reasonable-cause language

For #3, the late election, that is the move most CPAs miss. Say you formed your LLC in 2024, and your CPA never raised the S-corp election. You can usually file a late election in 2026, effective retroactive to January 2026 (or in some cases earlier). The IRS has a simple late-election process (Rev. Proc. 2013-30). You must show three things. You meant to be an S-corp. You have good reason for being late. And you have filed taxes as if the election were in place. File within 3 years and 75 days of the date you want it to start.

#What has to come with it

The S-corp election is not a paperwork-only move. The IRS expects the structure to actually function as an S-corporation:

1. Payroll has to run. Officer / owner salary paid on a regular cadence (we use monthly or semi-monthly). Through Gusto, Run by ADP, or a similar payroll provider.
2. Reasonable comp has to be documented. Industry benchmark, job description, comparable wage data. Not a number you picked.
3. The accountable plan has to be set up. Home office, vehicle, phone, internet: reimbursed from the S-corp tax-free, deducted at the entity level. Without this, you’re missing deductions.
4. Distributions have to be on a different schedule from payroll. Don’t pay yourself reasonable comp on the 15th and a distribution on the 16th. Distributions follow earnings; comp follows the payroll calendar.
5. A separate business bank account is non-negotiable. Co-mingling personal and business funds destroys the corporate veil and gives the IRS reason to disregard the entity.

#When the S-corp election is the WRONG move

We turn away S-corp election requests in three cases:

1. Net business income under ~$80K. Math doesn’t work. Schedule C is fine.
2. Real estate rental held in the entity. Rentals usually do not belong in an S-corp. An S-corp adds cost and takes away tax tools, and rent is not subject to SE tax anyway. Distribution rules and loss-passthrough mechanics are wrong for rentals.
3. Multiple owners with materially different operating roles. S-corps require pro-rata distributions to all owners. If two owners do different amounts of work, the S-corp structure forces awkward compensation gymnastics, partnership taxation handles this more cleanly.

#What we do when you engage

If you engage ETS for an S-corp election, the standard 30-day workflow:

• Day 1: Discovery call. We model your numbers, confirm S-corp is the right move, and quote.
• Day 2–3: Form 2553 prepared and filed (with reasonable-cause language if late).
• Day 4–10: Reasonable comp benchmarked + documented. Memo lives in your Basecamp portal.
• Day 10–14: Gusto payroll setup. Federal + state tax registrations. First payroll calendared.
• Day 14–21: Accountable plan built. Home office, vehicle, phone, internet templates delivered.
• Day 21–30: Distribution policy documented. Banking sub-accounts (via Relay) configured for payroll vs. operating vs. distribution.

By day 30, the structure is operational. Going forward it runs without you thinking about it.

#Common questions

Can I elect S-corp on my LLC without becoming a corporation? Yes. The LLC stays an LLC for state-law purposes (operating agreement, ownership, liability protection). The S-corp election is a federal tax election only.

What if I miss the March 15 deadline? File a late election under Section 1362(b)(5). The IRS approves the vast majority. We’ve never had one denied for a client.

Can I revoke the S-corp election later? Yes, but with consequences. Revocation triggers a 5-year wait before re-electing. Usually only worth it if the business has fundamentally changed (e.g., taking on outside investors who need C-corp treatment).

Do I need an EIN before filing? Yes. The S-corp election requires an EIN. If you don’t have one, we apply during the engagement (takes ~15 minutes).

What about state S-corp election: is that separate? Most states accept the federal S election. New York needs a separate form (CT-6). California and New Jersey follow the federal election, but California still charges a 1.5% tax. Check your state.

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If you’re clearing $80K+ in net business income and the S-corp election hasn’t been raised, the Discovery call is the right next step. We model your specific numbers and quote the engagement.