LLC vs S-Corp — What's the Difference and When to Switch
An LLC and an S-corp are not competing entity types — an LLC can be taxed as an S-corp. When people say "LLC vs S-corp," they almost always mean: should my LLC elect S-corp tax treatment with the IRS? The LLC stays an LLC legally; only the federal tax classification changes. S-corp election makes sense when your LLC earns roughly $40,000+ in net annual profit, because it lets you take part of your income as a distribution (not subject to self-employment tax) rather than all of it as earned income (fully taxed for Social Security and Medicare).
What an S-Corp Actually Is
An S-corp is not a business entity type — it's a federal tax election filed with the IRS using Form 2553. When your LLC elects S-corp status:
- Your LLC's legal structure stays the same — you still have an operating agreement, membership units, and all the standard LLC protections
- The IRS treats your business as an S corporation for tax purposes — you file Form 1120-S instead of Schedule C or Form 1065
- As a shareholder-employee, you pay yourself a reasonable salary subject to payroll taxes, and take additional profits as distributions that are not subject to self-employment tax
This distinction is the core of the S-corp tax benefit.
How the Tax Math Works
Without S-corp election, an LLC owner typically pays self-employment tax (15.3%) on all business net profit:
| Scenario | Net Profit | SE Tax Rate | SE Tax Owed |
|---|---|---|---|
| Single-member LLC (default) | $80,000 | 15.3% | $12,240 |
| With S-corp election | $80,000 | Only on salary | Depends on salary |
With S-corp election on $80,000 net profit:
- Owner pays themselves $45,000 reasonable salary → payroll taxes apply: ~$6,885
- Remaining $35,000 taken as distribution → no self-employment tax
- Estimated savings: ~$5,300/year (varies based on actual salary, state, other factors)
The break-even point is typically around $40,000–$50,000 in annual net profit. Below that, the cost of S-corp compliance (separate tax return, payroll processing, accountant fees) often exceeds the tax savings.
When S-Corp Election Makes Sense
Good candidates for S-corp election:
- LLC earning $40,000+ in net annual profit consistently
- Solo owner or small number of owners (all U.S. citizens/residents)
- Owner actively works in the business (so they can receive reasonable salary)
- Business does not plan to raise venture capital or take on corporate investors
S-corp election is NOT appropriate if:
- Net profit is below ~$40,000/year — compliance costs often exceed savings
- You have or plan to have non-U.S. owners (S-corps require all U.S. shareholders)
- You have or plan to have more than 100 owners
- You plan to raise venture capital (VCs won't invest through S-corps)
- You want to create different classes of stock (S-corps allow only one class)
- Your LLC has another company or LLC as a member (S-corps can only have individual owners)
How to Elect S-Corp Status
The election is made by filing IRS Form 2553 (Election by a Small Business Corporation):
Filing Deadlines
| Situation | Deadline |
|---|---|
| New LLC formed in current year | Within 75 days of formation date |
| Existing LLC wanting S-corp status for current tax year | March 15 of that year |
| Existing LLC wanting S-corp status for next tax year | Any time before Dec 31 of current year |
Missing these deadlines delays your S-corp election by a full year. The IRS does allow late elections if you can show "reasonable cause" — consult a CPA if you've missed the deadline but want to pursue this.
Step-by-Step: Filing Form 2553
- Download Form 2553 from irs.gov
- Complete Part I — business name, EIN, address, state of formation, date formed, fiscal year end (most LLCs use December 31 — calendar year)
- Choose the effective date — the date you want S-corp status to begin. For new LLCs this is typically your formation date. For existing LLCs, usually January 1 of the current or next year.
- Part II: Shareholder consent — each owner must sign the form. For single-member LLCs there's only one signature.
- Mail or fax to the IRS — the filing address depends on your state (listed in the Form 2553 instructions)
- Wait for IRS confirmation — the IRS sends a confirmation letter within 60–90 days. Keep this letter with your business records.
ZenBusiness offers S-corp designation filing for LLCs formed through ZenBusiness:
- Within 30 days of your LLC formation purchase: free
- After 30 days: $200
- Must be filed within 3 years and 75 days from the start of the target tax year
- Only available for LLCs formed by ZenBusiness (not corporations, not businesses formed elsewhere)
- Contact our support team to place this order — it's not available online
Ongoing S-Corp Requirements
S-corp election comes with additional compliance obligations beyond what a standard LLC requires:
Tax and Payroll
- Reasonable salary: You must pay yourself a salary that the IRS considers reasonable for the work you do. "Reasonable" is generally what you'd pay someone else to do your job. Taking a $1 salary to avoid payroll taxes is a red flag the IRS audits.
- Payroll taxes: Your salary is subject to federal income tax withholding, Social Security (6.2%), Medicare (1.45%), and FUTA. Your S-corp also pays the employer's share of Social Security and Medicare.
- Quarterly payroll deposits: You must make payroll tax deposits (usually quarterly or semi-weekly) and file Form 941 each quarter.
- Form 1120-S: Annual S-corp tax return due March 15 (not April 15 like personal returns).
- Schedule K-1: Issued to each shareholder showing their share of S-corp income — you use this on your personal return.
- Estimated taxes: As an S-corp shareholder, you pay estimated quarterly income taxes on your share of profits.
Corporate Formalities
S-corps must maintain the same formalities as C-corporations:
- Keep separate business bank accounts (never mix personal and business funds)
- Document decisions with written resolutions or meeting minutes
- Maintain a corporate record book with ownership records
Maintaining Eligibility
S-corp status automatically terminates if you violate IRS rules:
- Adding a shareholder who is not a U.S. citizen/resident
- Exceeding 100 shareholders
- Bringing in a corporate or LLC shareholder
- Creating a second class of stock
Inadvertent termination is treated as a reversion to C-corp taxation, which can create significant unexpected tax liability. Work with a CPA who understands S-corps.
LLC vs S-Corp: Quick Comparison
| Standard LLC | LLC with S-Corp Election | |
|---|---|---|
| Legal structure | LLC | LLC (unchanged) |
| Tax classification | Disregarded entity or partnership | S corporation |
| Self-employment tax | On all net profit | Only on salary (not distributions) |
| Payroll required | No | Yes — must pay yourself salary |
| Annual tax return | Schedule C or Form 1065 | Form 1120-S (due March 15) |
| Complexity | Low | Moderate–High |
| Owner requirements | Flexible | Max 100, all U.S. citizens/residents |
| Best for profit level | Any | $40,000+ net profit |
| Compliance cost | Low | Higher (payroll, accountant, etc.) |
Frequently Asked Questions
Does S-corp election change my LLC into a corporation?
No. Your LLC remains an LLC in every legal sense — you still have operating agreements, membership units, and LLC liability protections. S-corp is only a federal tax classification. Your state still sees you as an LLC. Your contracts, bank accounts, and business relationships are all unchanged.
How much does S-corp election actually save?
The savings depend on your net profit and the salary you set. A rough estimate: you save roughly 15.3% (the self-employment tax rate) on the portion of profit you take as distributions rather than salary. On a $30,000 distribution, that's approximately $4,590 in SE tax savings. However, this needs to be weighed against increased compliance costs — payroll processing ($500–2,000/year), an accountant who can handle S-corp returns ($1,000–3,000/year), and your time. Net savings are usually meaningful only above $40,000–50,000 in annual profit.
Can I convert back from S-corp to regular LLC taxation?
Yes. You can revoke your S-corp election by filing a written statement with the IRS. The revocation is effective either on the date you specify or the first day of the next tax year. Once revoked, you generally cannot re-elect S-corp status for 5 years.
My LLC is multi-member. Can we still do S-corp election?
Yes, if all members are U.S. citizens or residents and your total membership count is 100 or fewer. Each member must sign Form 2553. Multi-member S-corps are more complex because the IRS scrutinizes salary allocation more closely — each member who works in the business must receive reasonable compensation.
Do I need an EIN to elect S-corp status?
Yes — your EIN is required on Form 2553. If you don't have one yet, get it first at irs.gov/ein (free, instant online). See What Is an EIN for details.
What states don't recognize S-corp elections?
Most states honor the federal S-corp election automatically. Exceptions: California imposes a 1.5% franchise tax on S-corp income. New York City ignores S-corp status and taxes S-corps as C-corps. Illinois, New Jersey, and Minnesota impose additional fees. If you operate in these states, factor in state-level S-corp costs when calculating your net savings.
Get started: Contact ZenBusiness support to add S-corp designation to your LLC formation, or consult a CPA to determine if S-corp election makes sense for your specific profit level and situation.