A single-member LLC does not automatically save you taxes. The IRS taxes a single-member LLC identically to a sole proprietorship by default — both report income on Schedule C and pay the full 15.3% SE tax. The LLC gives you liability protection and credibility. Tax savings only come through an S-Corp election, which is a separate decision that only makes sense at higher income levels.
The real differences
| Factor | Sole Proprietor | Single-Member LLC |
|---|---|---|
| Formation cost | $0 — automatic when you start working | $35–$500 state filing fee (avg. $132) |
| Ongoing costs | $0 | $50–$300/year (annual report + registered agent) |
| Paperwork | None — no state filings required | Articles of Organization + operating agreement |
| Liability protection | ❌ None — personal assets at risk | ✅ Business debts/lawsuits can't touch personal assets |
| Federal taxes (default) | Schedule C — SE tax on all net profit | Identical — Schedule C, same SE tax |
| S-Corp election available | ❌ No | ✅ Yes — enables SE tax savings at higher income |
| Business bank account | Available but often harder to open without LLC | Cleaner separation, easier to open business accounts |
| Client credibility | Some clients prefer or require LLC status | "LLC" in your name signals business formality |
| Business credit | Can build business credit under EIN | Stronger foundation for business credit building |
Liability protection — what it actually means
The LLC's defining advantage is the liability shield. As a sole proprietor, you and your business are legally the same entity — if a client sues your business for $200,000, they're suing you personally. Your personal bank accounts, car, and home are theoretically exposed.
An LLC creates a legal separation. Business liabilities stay with the business. Your personal assets are protected from most business claims — with important exceptions.
One critical caveat: the liability shield only works if you maintain clean separation between business and personal finances. Mixing money, paying personal bills from the business account, or operating informally can allow courts to "pierce the corporate veil" — meaning the protection disappears. An LLC only protects you if you actually run it like a separate entity. That means a dedicated business bank account, separate accounting, and an operating agreement on file.
Taxes — what changes and what doesn't
This is where most online articles mislead solo operators. Here is the accurate picture:
Default LLC taxation is identical to sole proprietor. A single-member LLC is a "disregarded entity" for federal tax purposes — the IRS treats it as if the LLC doesn't exist, and all income flows to your personal Schedule C. You pay the exact same self-employment tax (15.3% on 92.35% of net profit) and income tax as a sole proprietor. Forming an LLC does not reduce your SE tax bill.
The only way to reduce SE tax through your entity structure is the S-Corp election. An LLC can elect to be taxed as an S-Corp — this is a separate IRS election (Form 2553) that changes how the business income is taxed. With an S-Corp, you pay yourself a salary (subject to payroll tax) and take remaining profits as distributions (not subject to SE tax). At high enough income levels, this saves meaningful money. See the S-Corp election guide for the full breakdown.
What an LLC actually costs in 2026
Formation fees vary significantly by state. The cheapest states are Montana ($35), Kentucky ($40), Arkansas ($45), and several states at $50. The most expensive are Massachusetts ($500), Nevada ($425), Tennessee ($300), and Texas ($300). Form in your home state — not in a "cheaper" state — unless you're comfortable maintaining two state filings (a domestic LLC where you live plus a foreign qualification in the cheaper state).
| Cost Item | DIY | Northwest Registered Agent |
|---|---|---|
| State filing fee | $35–$500 (your state) | $35–$500 (same state fee) |
| Formation service | $0 | $39 |
| Registered agent (Year 1) | $0 (be your own) | Included in $39 |
| Registered agent (Year 2+) | $0 (if you're your own RA) | $125/year |
| Operating agreement | $0 (use a template) | Included |
| EIN from IRS | $0 (always free at IRS.gov) | $0 |
DIY filing takes 15–30 minutes at your state's Secretary of State website. Northwest Registered Agent charges $39 for LLC formation plus your state filing fee, with registered agent service included in Year 1 and renewing at $125/year. Never pay a third party for an EIN — it's always free at IRS.gov.
When to form an LLC — the honest answer
After you form the LLC — what actually needs to happen
Forming the LLC is step one. The liability protection only works if you follow through with the operational requirements.
- Open a dedicated business bank account — Mercury or Relay, in the LLC's name. All business income goes here. No personal expenses ever come out of it.
- Get an EIN — free at IRS.gov, takes 5 minutes. Use the EIN (not your SSN) for all business tax documents and bank accounts.
- File your operating agreement — even for a single-member LLC. Keep it on file. Some states and some banks require it.
- File annual reports — most states require an annual report and fee. Miss it and your LLC can be administratively dissolved. Set a calendar reminder.
- Update all client contracts — invoices, agreements, and W-9s should now show your LLC name. Clients paying you should make checks or transfers to the LLC.
- Never mix personal and business money — this is the most common mistake that pierces the liability shield. Every dollar that comes into the business goes to the business account. Pay yourself via a transfer, not by spending business funds directly on personal items.