“Just form an LLC” is the single most common piece of startup advice on the internet. It’s also incomplete. The LLC is the right default for most early-stage founders — but at some point in the growth curve, a single tax election can cut your tax bill by thousands of dollars a year without changing your legal structure at all. That election is S-Corp status. Most founders never run the numbers. Here’s how to do it.
First, Clear Up the Confusion
The LLC vs. S-Corp comparison trips people up because they’re comparing different things. An LLC is a legal structure. An S-Corp is a tax election — you can be an LLC that’s taxed as an S-Corp, which is exactly what most small business owners mean when they say “I have an S-Corp.” Almost nobody forms a true S-Corp corporation from scratch anymore.
What’s actually happening: by default, a single-member LLC files taxes on Schedule C and pays self-employment tax on all its net profit. The S-Corp election tells the IRS to treat your LLC like an S-Corp for tax purposes — which unlocks a split between salary (subject to payroll taxes) and distributions (not subject to payroll taxes). That split is where the savings live.
The Self-Employment Tax Problem
Self-employment tax is the part of the tax code that hurts more than founders expect. In 2026, it’s 15.3% on the first $184,500 of net self-employment income — 12.4% for Social Security and 2.9% for Medicare — with 2.9% continuing beyond that threshold (plus an additional 0.9% Medicare surcharge above $200,000 for single filers).
A regular W-2 employee pays half that rate (7.65%), because the employer pays the other half. When you’re self-employed, you’re both the employer and employee, so you pay the full 15.3%.
On $100,000 of net profit as a single-member LLC, your SE tax is approximately $14,100. That’s a meaningful number, and it scales directly with revenue — there’s no deduction, no phase-out, no planning opportunity within the LLC structure itself.
What S-Corp Election Actually Does
When you elect S-Corp status, the IRS requires that you pay yourself a reasonable salary for the work you do. That salary gets hit with normal payroll taxes (same 15.3%, split between employer and employee, but functionally the same). Everything above that salary — what’s called a distribution — is not subject to self-employment or payroll tax.
The math in plain terms: you’re converting some taxable-for-FICA income into non-FICA income. You still pay income tax on all of it. The only tax you’re actually cutting is the 15.3% on the distribution portion.
A Real Example at $100K Net Profit
| Scenario | SE / Payroll Tax |
|---|---|
| Single-member LLC (default) | ~$14,100 on all $100K |
| S-Corp, $60K salary + $40K distribution | ~$9,200 on $60K salary |
| Annual savings | ~$4,900 |
Deduct $2,500–$3,000 in added compliance costs (payroll processing, additional tax prep), and the net savings land around $2,000–$2,400 at $100K in profit. That’s real money — but not enormous.
The savings grow significantly as profit increases:
- $150K profit / $80K salary / $70K distribution → net savings after costs: ~$5,500–$6,000/year
- $200K profit / $90K salary / $110K distribution → net savings after costs: ~$9,000–$10,000/year
Above $200K, the math becomes more nuanced because SE tax already stops applying at $184,500 for the Social Security portion, so the advantage narrows on the Medicare-only portion. The cleanest benefit window is roughly $80K–$200K in net profit.
The Compliance Cost You Can’t Ignore
The S-Corp election isn’t free. You’re taking on real obligations:
- Payroll processing. You must run actual payroll — quarterly deposits, W-2s, 941 filings. A payroll service (Gusto, ADP, QuickBooks Payroll) typically runs $500–$1,200/year for a one-person company.
- Additional tax prep. Your accountant now files a separate S-Corp return (Form 1120-S) in addition to your personal return. Expect to pay $1,000–$2,500 more per year.
- State fees and returns. Many states charge S-Corps extra — California is the starkest example, adding an $800 minimum franchise tax plus a 1.5% net income tax on the S-Corp itself.
- Formalities. You need to run payroll on schedule, keep the salary reasonable and documented, and file the election itself (Form 2553) with the IRS by the deadline.
Total added burden: roughly $2,000–$3,500/year for most solo founders outside California. That’s the hurdle your FICA savings need to clear before the election makes sense.
The Breakeven Point
Based on current self-employment tax rates and typical compliance costs, the S-Corp election starts saving money at approximately $75,000–$80,000 in net profit for most founders. Below that, the compliance costs erase the FICA savings.
California founders face a higher threshold. The combination of the $800 franchise tax, the 1.5% S-Corp net income tax, and higher accountant fees typically pushes the California breakeven to $100,000–$120,000 in net profit. Some California founders at $100K are better off staying as a single-member LLC.
Other states with entity-level taxes on pass-through businesses (New York, Massachusetts, New Jersey) similarly shift the threshold upward.
The “Reasonable Compensation” Requirement
This is the part the IRS watches carefully. The whole savings mechanism depends on the salary-to-distribution split — so there’s an obvious temptation to set your salary to $1 and take everything as a distribution. The IRS explicitly prohibits this.
Your salary must reflect what you’d pay someone else to do your job. The IRS looks at:
- What comparable roles pay in your market
- How much time you spend in the business
- The company’s revenue and profitability
- Your experience and qualifications
There’s no bright-line rule, but CPAs generally use 40–60% of net profit as a reasonable starting range for a working owner. Setting a $40K salary on a $200K business invites scrutiny. Getting caught paying unreasonably low wages means back payroll taxes, penalties, and interest — which can wipe out several years of savings in one audit.
When to Elect (and How)
The mechanics are straightforward. You file Form 2553 with the IRS, signed by all members. To have the election apply to the current tax year, you must file it by the 15th day of the third month of that tax year (March 15 for a calendar-year entity). If you miss that, it applies to the following year, or you can file for late relief if you have a qualifying reason.
Make the election when:
- Net profit is consistently above $80K (not just one good quarter).
- You have a CPA who handles S-Corps and can set up payroll correctly.
- You’re outside California or have confirmed the math works in your state.
- The savings are recurring — one-time high-revenue years don’t justify the permanent overhead.
For deeper reading on how tax structure fits into overall wealth building, Tom Wheelwright’s Tax-Free Wealth is the best-written argument for why founders should treat tax strategy as a core business function, not an afterthought left to an accountant once a year.
What S-Corp Election Doesn’t Change
A common misconception: electing S-Corp status doesn’t change your liability protection, your operating agreement, or how the business is managed. You’re still an LLC. The change is purely on your tax return. Your bank accounts, contracts, and legal structure stay exactly the same.
It also doesn’t change your income tax rate. You’re still paying ordinary income tax on your salary and distributions. The only tax you’re cutting is the payroll/SE portion.
A Simple Decision Framework
Step 1: Estimate your annual net profit (revenue minus business expenses, before owner compensation).
Step 2: Run the FICA savings: (net profit − reasonable salary) × 15.3%.
Step 3: Get a quote from your CPA for the added cost of S-Corp (payroll + extra return).
Step 4: Check your state for entity-level taxes.
Step 5: If step 2 minus step 3 minus step 4 is positive and persistent, the election makes sense.
If you’re not sure what “reasonable compensation” is for your role, look at Bureau of Labor Statistics occupational wage data or what a role equivalent to yours pays in your area. That’s what the IRS looks at.
FAQ
Can I convert my LLC to an S-Corp mid-year?
Yes, but the election only takes effect at the start of a tax year unless you file within 75 days of formation or the start of the year. If you file Form 2553 after the 75-day window, the election will typically apply to the following calendar year. Late-election relief is available in some cases if you can show you intended to file on time.
Do I need to pay myself a salary right away?
Once the S-Corp election takes effect, yes. If you’re an active owner providing services to the business, the IRS requires reasonable compensation to be paid through payroll. You can’t wait until year-end and do it as a retroactive adjustment.
What happens if my profit drops below the breakeven?
Nothing catastrophic — you’ll just be paying compliance costs without saving enough to cover them. If your profit drops significantly and stays low, you can revoke the election, but there are restrictions on re-electing later. Don’t elect S-Corp status speculatively based on projected income; wait until the profit is real and consistent.
Is an S-Corp the same as a C-Corp?
No. A C-Corp is a separate legal and tax structure with its own tax rate (21% federal flat rate in 2026) and the double-taxation issue — profits taxed at the corporate level, then again as dividends at the shareholder level. The S-Corp election is a pass-through structure: all income flows to your personal return, taxed once. The two are not interchangeable, and most small business owners and founders should not default to C-Corp unless they’re on a venture track that specifically benefits from C-Corp treatment (institutional VC investment, stock options at scale, Delaware incorporation for preferred stock rounds).
What’s the deadline to elect S-Corp status for 2027?
For a calendar-year business, you need to file Form 2553 by March 15, 2027 for the election to take effect in 2027. File it in January or February to give yourself a margin. Your CPA can file it for you and attach it to an existing S-Corp return if you’re already operating.
The LLC vs. S-Corp question isn’t about which structure is better in the abstract — it’s arithmetic. Run your numbers, confirm your state’s costs, and make the election when the savings clearly outpace the overhead. For more on how founders manage cash and structure compensation, explore the finance section on FutureSharks.
