Key Insight: An S-Corp is not a separate legal structure — it's a tax election. An LLC can be taxed as an S-Corp. The real question is whether the tax savings exceed the added administrative costs, which typically happens around $40,000–$50,000 in annual profit.
Understanding the Basics
LLC
A Limited Liability Company is a legal structure that provides personal liability protection with flexible taxation. By default, it is taxed as a pass-through entity (sole proprietorship or partnership).
- Simple to form and maintain
- Flexible ownership structure
- Default pass-through taxation
- No required salary for owners
S-Corporation
An S-Corp is a federal tax election (not a legal structure) that allows profit distributions to avoid self-employment tax. An LLC elects S-Corp status by filing IRS Form 2553.
- Saves self-employment taxes at higher income
- Owner-employees pay themselves a salary
- Distributions avoid 15.3% SE tax
- More compliance and payroll required
The Core Tax Difference
The biggest financial difference between an LLC and S-Corp is how self-employment (SE) tax is applied. SE tax is 15.3% on the first $160,200 of net profit, and 2.9% above that.
Tax Comparison Example: $100,000 Net Profit
Standard LLC (Sole Prop Tax)
LLC Taxed as S-Corp
Full Side-by-Side Comparison
| Feature | LLC | S-Corp Election |
|---|---|---|
| Formation Cost | Low ($40–$500 state fee) | Medium (same + more compliance) |
| Self-Employment Tax | On all net profit (15.3%) | Only on salary, not distributions |
| Annual Maintenance | Minimal — annual report only | More — payroll, corporate minutes |
| Ownership Limits | Unlimited members, any type | Max 100 shareholders, US citizens only |
| Profit Distribution | Flexible — any allocation | Must be proportional to ownership |
| Liability Protection | Full personal liability shield | Full personal liability shield |
| Investors / Funding | Limited VC compatibility | Limited — VCs prefer C-Corps |
| Fringe Benefits | Owner can deduct most benefits | 2%+ shareholders have limits |
| Best For | Starting out, under $40K profit | Established businesses, $40K+ profit |
When Should You Elect S-Corp Status?
The S-Corp election adds administrative costs: payroll setup, quarterly payroll taxes, an additional tax return (Form 1120-S), and potentially a payroll service. These costs typically run $1,500–$3,000 per year.
Consider S-Corp When:
- Net profit consistently above $40,000/year
- You're a service provider (consultant, designer, developer)
- Your business is stable and cash flow is predictable
- Your accountant recommends it based on your numbers
Stick with Standard LLC When:
- Net profit under $40,000/year
- Just starting out or income is inconsistent
- You have non-US-citizen owners or investors
- You plan to seek venture capital investment
How to Elect S-Corp Status for Your LLC
Form your LLC first
You must have a valid LLC before making the S-Corp tax election.
File IRS Form 2553
Submit Form 2553 (Election by a Small Business Corporation) to the IRS. Must be filed within 75 days of formation, or by March 15 for the following tax year.
Set up payroll
You must pay yourself a reasonable salary and run payroll — typically through a service like Gusto, QuickBooks Payroll, or ADP.
File Form 1120-S annually
S-Corps file a separate information return (Form 1120-S) in addition to your personal tax return. Your accountant handles this.
Frequently Asked Questions
Is an S-Corp better than an LLC?
Neither is universally "better." An LLC is simpler and ideal when starting out. The S-Corp election becomes advantageous when your annual net profit consistently exceeds $40,000–$50,000.
Can an LLC be taxed as an S-Corp?
Yes — this is one of the most common tax strategies for small business owners. File IRS Form 2553 to make the election. You keep the LLC's legal structure while gaining S-Corp tax treatment.
What is a "reasonable salary" for an S-Corp?
The IRS requires S-Corp owner-employees to pay themselves a salary comparable to what you'd pay an employee doing the same job. Typically 40–60% of total compensation. Your accountant can help determine the right amount.
Does an S-Corp save on self-employment taxes?
Yes. Only your salary is subject to the 15.3% self-employment tax. Profit distributions above your salary are not. This is how S-Corp owners save $5,000–$15,000+ per year.