LLC vs sole proprietorship comes down to liability and admin. A sole proprietorship is automatic and simple, but you're personally liable for business debts. An LLC is a separate legal entity that usually protects your personal assets. By default, a single-member LLC is taxed the same way as a sole proprietorship.
If you're starting a business in the US, you're a sole proprietor by default the moment you start selling. You don't file anything to become one. An LLC is the step up that most founders ask about next. Here's what really changes when you make that move, and when it's worth doing.
The one big difference
A sole proprietorship isn't separate from you. The business's debts are your debts, and if someone sues the business, they're suing you. An LLC, or limited liability company, is a separate legal entity created under state law. In most situations, its debts and legal claims stay with the company, which helps protect your home, savings and other personal assets.
That protection has limits. You're still personally responsible for your own negligence, for any loan you personally guarantee, and for taxes you owe. Courts can also look past an LLC if you mix business and personal money or treat the company as a piggy bank. Keeping things separate is what makes the shield hold.
Side by side
| Sole proprietorship | LLC | |
|---|---|---|
| How you form it | Automatic once you start trading | File articles of organization with your state |
| Personal liability | Unlimited | Limited, if you keep the business separate |
| Default federal tax | Profit on Schedule C of your personal return | Same for a single-member LLC, unless you elect otherwise |
| Self-employment tax | On all profit | On all profit by default; an S corp election can change this |
| Ongoing paperwork | Light | Annual reports and state filings in most states |
| Business name | Your own name, or a DBA | The LLC's registered name |
| Raising money or adding partners | Hard | Easier, with an operating agreement |
Tax: less different than people think
Here's the bit that surprises most people. By default, the IRS treats a single-member LLC as a disregarded entity, which means you report the profit on your own tax return exactly as a sole proprietor would. Forming an LLC doesn't, by itself, lower your tax bill.
The tax conversation changes when an LLC elects to be taxed as an S corporation. Then you pay yourself a reasonable salary through payroll and may take the rest as distributions, which can reduce self-employment tax once profits are high enough. It also adds payroll, extra filings and accountant time, so it's a decision to make with a tax professional, not a default.
When staying a sole proprietor makes sense
- You're testing an idea and aren't sure it'll last.
- Your work carries low risk of someone suing you, such as writing, design or bookkeeping for a handful of clients.
- You have good business insurance and few business debts.
- You want the least admin possible while you find your feet.
When an LLC is worth it
- You sign contracts, lease space or take on debt in the business's name.
- Your work has real liability risk, such as physical products, events, home services or advice that clients act on.
- You're bringing in a partner and want ownership written down.
- You want a business bank account, a separate identity and a cleaner story for clients, lenders and future buyers.
How to move from sole proprietor to LLC
- Pick your state. Most small businesses form in the state where they operate, which avoids registering in two places.
- Check the name is available with your secretary of state and that you can get a matching domain.
- File articles of organization and appoint a registered agent.
- Write an operating agreement, even if you're the only member.
- Get a free EIN from the IRS and open a business bank account in the LLC's name.
- Move contracts, payment processors and licences over to the LLC.
- Diary the annual report deadline for your state.
If you live outside the US, the process is a little different, and I explain it in how to set up a US LLC as a non-US resident. And whichever structure you choose, protecting your name is a separate job, so read how to trademark a business name.
Habits that keep the protection working
Forming an LLC is the easy part. Treating it as a separate business is what makes the liability shield count if anything goes wrong.
- Pay every business cost from the business account, and move money to yourself as a clear owner's draw.
- Sign contracts in the LLC's name, with your title, rather than in your own name.
- Keep the LLC in good standing by filing its annual report and keeping the registered agent current.
- Make sure there's enough money in the business to cover its normal obligations.
- Keep business insurance in place. The LLC protects your personal assets, while insurance pays claims against the business itself.
What about the UK?
The UK doesn't have LLCs. The equivalent choice is between being a sole trader and setting up a limited company with Companies House. The trade-offs are similar, with different tax rules, and I've covered them in sole trader vs limited company.
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My take
Start as a sole proprietor if you're testing an idea and the risk is low. Form an LLC once you're signing real contracts, taking on risk or bringing in partners. Then keep the business money in its own account, because that's what makes the protection count.
Frequently asked questions
Do I need an EIN as a sole proprietor?
Not always. A sole proprietor without employees can usually use their Social Security number, though many get a free EIN anyway to keep it off invoices and forms. An LLC with employees, or with more than one member, needs an EIN.
Is an LLC better than a sole proprietorship?
An LLC is better for protecting your personal assets and adding partners. A sole proprietorship is simpler and has less admin. For low-risk, early-stage businesses, a sole proprietorship is often enough.
Does an LLC save you tax?
Not by default. A single-member LLC is taxed like a sole proprietorship unless it elects to be taxed as an S corporation, which can reduce self-employment tax once profits are high enough.
Can I switch from a sole proprietorship to an LLC later?
Yes. Form the LLC with your state, get an EIN, open a business bank account and move your contracts and payment tools over to the LLC.
Does an LLC protect me from everything?
No. You're still responsible for your own negligence, any debts you personally guarantee and your taxes. Mixing business and personal money can also weaken the protection.
Do I need a lawyer to form an LLC?
No, many founders file themselves through their state's website. A lawyer or accountant is worth it for multi-member LLCs, complex operating agreements or tax elections.
