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LLC or Sole Proprietor: What Changes for a Small Service Business?
Forming an LLC mainly changes who is on the hook for business debts and how much paperwork you keep; for a one-owner business, federal income tax stays the same unless you choose otherwise.
General information, not legal/tax/financial advice; talk to a licensed professional about your situation.
For a single-owner service business, the main difference between an LLC and a sole proprietorship is liability: a sole proprietor can be held personally liable for the business's debts, while an LLC protects the owner from personal liability in most instances, according to the SBA. Federal income tax does not change by default, because the IRS treats a one-member LLC as disregarded from its owner, so profit still goes on Schedule C and still owes self-employment tax at 15.3%.
What changes and what stays the same
| Question | Sole proprietorship | Single-member LLC (default) |
|---|---|---|
| Personal liability for business debts | Unlimited; business and personal assets are not separate | Owner generally not personally liable, with exceptions (personal guarantees, your own negligence, mixing funds) |
| Federal income tax | Schedule C on the owner's Form 1040 | Same: Schedule C, unless the LLC elects to be taxed as a corporation |
| Self-employment tax | 15.3% on net earnings of $400 or more | Same |
| Payroll if you hire | Owner's name and EIN | LLC's own name and EIN for employment taxes |
| Setup cost | Usually none beyond local licenses and a trade name filing | State filing fee; the SBA says registration usually costs under $300, varying by state |
| Ongoing state cost | Usually none | Varies widely; California charges every LLC organized or doing business there an $800 annual tax |
| Paperwork to keep | Business licenses, separate bank account recommended | Operating agreement, separate bank account, annual state report where required |
| Federal ownership report (BOI) | Not required | Not required for domestic companies; FinCEN made the exemption final in 2026 |
A checklist before you file
- List what could go wrong. A home trades or cleaning business that works in customers' homes faces different risks from an online coach; general liability and professional liability insurance cover many risks an LLC does not, since an LLC does not shield an owner from their own negligence.
- Check your state's fees. Look up the formation fee and any annual fee or report; in California the $800 annual tax applies even in a year with no income.
- Plan to keep money separate. Liability protection depends on treating the LLC as a separate business, with its own bank account and no personal spending from it.
- Read your personal guarantees. Many leases, equipment loans and supplier accounts ask the owner to sign personally, which the LLC does not undo.
- Ask about tax elections separately. An LLC can elect to be taxed as a corporation with IRS Form 8832, or as an S corporation; whether that saves money depends on profit and payroll, so it is a question for a tax professional rather than a reason on its own to form an LLC.
- Update the paperwork. Move contracts, the bank account, licenses and your payment processor into the LLC's name once it exists.
Why it works
The self-employment tax rate of 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare, applies to a sole proprietor and a default single-member LLC alike, with the Social Security part capped at the first $184,500 of combined earnings in 2026, so the choice of entity on its own does not lower that bill. Keeping the two questions apart, liability first and tax second, stops owners from paying state fees for a tax saving that the default LLC does not deliver.
Sources
- U.S. Small Business Administration. Choose a business structure.
- Internal Revenue Service. Single member limited liability companies and Limited liability company (LLC).
- Internal Revenue Service. Self-employment tax (Social Security and Medicare taxes).
- Social Security Administration. Contribution and benefit base.
- California Franchise Tax Board. Limited liability company.
- Financial Crimes Enforcement Network. Beneficial Ownership Information Reporting.
Email hello@osnovaops.com about your business to set up the contracts, accounts and systems that go with your new structure.
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