The S-Corp is the most misunderstood structure in small business. It's not an entity you "form" — it's a tax election applied to an LLC or corporation you already formed. When it fits, it can save you 15.3% self-employment tax on a meaningful chunk of your profit. When it doesn't, the payroll overhead eats the savings.
First, get the terminology right
- You form an LLC or C-Corp with your state.
- You elect S-Corp status with the IRS, using Form 2553.
- After the election, the entity files an S-Corp tax return (Form 1120-S) instead of a schedule C or Form 1065.
So "starting an S-Corp" really means: form the entity, then file the election.
Who qualifies for S-Corp status
Strict rules apply:
- Max 100 shareholders.
- One class of stock only.
- Shareholders must be US citizens or green card holders. H-1B, L-1, EAD, and ITIN holders are NOT eligible — this is the rule that trips up immigrant founders most. If that's you, an LLC or C-Corp is the path.
- Certain entities (like insurance companies and some banks) are excluded.
How the savings work
Here's the core math. As a sole proprietor or single-member LLC:
- You pay self-employment tax (15.3%) on 92.35% of your net profit.
As an S-Corp:
- You pay yourself a reasonable salary (W-2 wages), and pay FICA (the employee share) + payroll taxes on that salary.
- The remaining profit passes through to you as a distribution with no self-employment tax.
| Profit level | LLC (SE tax) | S-Corp (salary + distribution) |
|---|---|---|
| $40k | ~$5,650 SE tax | Payroll overhead often eats the savings |
| $80k | ~$11,300 SE tax | Real savings once salary is justified |
| $150k | ~$21,200 SE tax | Savings grow as salary plateaus |
The rule of thumb: ~$80k net profit
Below roughly $80k in net profit, the cost of payroll setup, quarterly filings, and W-2 tax prep usually eats the savings. Above it, the S-Corp election starts paying you back every year.
Industry salary benchmarks to stay audit-safe:
- Software consultants: 40–50% of net profit
- Freelance designers: 45–55%
- Real estate agents: 30–40% (commission-heavy)
- Doctors / dentists: 60–70% (specialist salaries are high)
The timeline
- Form your LLC (or corporation) — usually in your home state.
- File Form 2553 — must be filed by the 15th day of the 3rd month of the tax year you want the election to begin. For a new business, that's usually mid-March.
- Run payroll — register with the IRS and your state, set up payroll processing for your W-2 salary.
- File Form 1120-S — annual S-Corp tax return.
- Distribute profit — as dividends/distributions, free of SE tax.
Miss the Form 2553 deadline? You can file late with a reasonable-cause explanation, but don't count on it — plan the election at formation.
What it costs to run an S-Corp
| Item | Ongoing cost |
|---|---|
| Payroll service | ~$30–$100/month |
| S-Corp tax return | $500–$1,500/year (vs. a simple schedule C) |
| State franchise tax (some states) | Varies |
| CPA strategy review | Worth it annually |
Common questions
Is an S-Corp the same as an LLC? No. The LLC is the entity; S-Corp is the election on top of it. You can have an "S-Corp LLC" or an "S-Corp C-Corp" (usually the latter is just called an S-Corp).
Can I switch from LLC to S-Corp later? Yes — file Form 2553 when the election makes sense (profit above ~$80k). This is the most common path.
Do I have to pay myself a salary? Yes — you must run payroll and pay yourself a reasonable W-2 wage. You can't take everything as distributions.
What happens if I leave the company? S-Corp status is per-company, not per-person. The company keeps its election; the new shareholder must qualify.
I'm on a work visa — what should I do instead? Form an LLC or C-Corp as a shareholder. Talk to a CPA about how the entity's income interacts with your visa status. See our visa guides.
Ready to start?
Form your LLC or C-Corp, then elect S-Corp when the math makes sense. We file the entity and include a CPA review of your salary and timing so you don't leave money on the table.