To transfer a sole proprietorship to an LLC, you file a formation document with your state, get a federal tax ID, and then move your business assets, contracts, licenses, insurance, and bank accounts into the new entity’s name. State filing fees run from about $35 to $500, and most conversions can be completed within a few weeks. The point of the whole exercise is to put a legal wall between your personal assets and your business debts, so the details of how you handle the handoff matter as much as the filing itself.
File the Formation Paperwork With Your State
Start with a name. Every state requires the LLC’s name to include a designator such as “LLC,” “L.L.C.,” or “Limited Liability Company,” and a few states also accept shortened forms like “LC” or “Limited Company.”1U.S. Small Business Administration. Choose Your Business Name The name has to be distinguishable from any other entity already on file with your Secretary of State, so check availability before you commit to signage, a website, or business cards.
Next, designate a registered agent. This is the person or company authorized to receive legal documents and government notices for the LLC, and they must have a physical street address in your state. You can serve as your own agent, but many owners hire a service to keep their home address out of public records and to make sure someone is available during business hours to accept service of process.
Then file the document that actually creates the LLC. It’s usually called the Articles of Organization, though some states call it a Certificate of Formation. You file it with your state’s business registration agency, typically the Secretary of State. The form asks for the LLC’s name, its principal address, the registered agent’s details, and whether the LLC will be managed by its members or by designated managers. Most states let you file online. Once the state approves the filing, you’ll get a stamped copy or a certificate of existence. Keep it with your formation records.
A handful of states also require you to publish a notice of the LLC’s formation in a local newspaper, which adds cost and time.2Accounting Today. Which States Have Publication Requirements for Business Entities Check whether your state has one before assuming the filing step is finished.
While you’re at it, draft an operating agreement. It’s the internal rulebook covering how the LLC is managed, how profits are divided, and what happens if a member leaves. Most states don’t require you to file it, but a few require every LLC to adopt one, and even for a single-member LLC it reinforces the separation between you and the business.3U.S. Small Business Administration. Basic Information About Operating Agreements Without one, your state’s default LLC rules govern by default.
Get an EIN for the LLC
An Employer Identification Number is a federal tax ID issued by the IRS. Whether you strictly need a new one depends on your setup: if your single-member LLC will be taxed as a disregarded entity, won’t have employees, and won’t owe excise taxes, you can keep using your sole proprietor Social Security number or existing EIN. If the LLC will have employees, elect corporate or S-corporation tax treatment, or owe excise taxes, you need a new EIN.4Internal Revenue Service. When to Get a New EIN
In practice, most owners get a new EIN anyway. Banks typically require one to open a business account in the LLC’s name, and a separate tax ID keeps business and personal finances cleanly apart. The application is free, takes about ten minutes on the IRS website, and you receive the EIN immediately.5Internal Revenue Service. Get an Employer Identification Number Ignore third-party sites that charge for it. The IRS never does.
Move Your Assets and Accounts Into the LLC
Filing creates the entity. It doesn’t move your business into it. That part is on you.
Formally transfer your sole proprietorship’s assets to the LLC: equipment, inventory, intellectual property, customer lists, and anything else the business runs on. Use a bill of sale for tangible property and assignment agreements for intangibles like trademarks or domain names. If you’re transferring real estate, you’ll need a new deed recorded with your county.
Real estate deserves extra caution. Some jurisdictions treat a transfer to your own LLC as a change of ownership that triggers transfer taxes or a property tax reassessment. If the property carries a mortgage, the transfer could technically trip the due-on-sale clause and give the lender the right to demand full repayment. Lenders don’t always enforce this for transfers to single-member LLCs, but talk to yours before recording the deed.
Then open a dedicated bank account in the LLC’s name and route all business income and expenses through it starting the day the LLC exists. This isn’t just tidy bookkeeping. Mixing personal and business funds is the fastest way to lose the liability protection you just paid to set up.
Update Contracts, Licenses, and Insurance
Your existing contracts, leases, and vendor agreements were signed by you personally. They don’t automatically follow you into the LLC. Go through each one and either assign it to the LLC, if the contract allows assignment, or renegotiate a new agreement in the LLC’s name. From this point forward, sign every contract as a representative of the LLC, not in your personal capacity.
Business licenses and permits are issued to a specific entity, so contact your city, county, and state licensing agencies to update or reapply under the LLC. If you hold professional licenses, check whether your licensing board allows the LLC to hold the license or whether it has to stay in your personal name.
Insurance policies need the same treatment. Have your general liability, professional liability, and any other business coverage reissued or endorsed to name the LLC as the insured. A policy in your personal name won’t necessarily cover a claim against the LLC, and that gap is expensive to discover after a loss.
How Taxes Change After the Conversion
For most sole proprietors forming a single-member LLC, federal income tax barely changes. The IRS treats a single-member LLC as a “disregarded entity” by default, meaning it ignores the LLC for income tax purposes. You continue reporting business income on your personal return using Schedule C, just as you did as a sole proprietor.6Internal Revenue Service. Limited Liability Company – Possible Repercussions Because the IRS doesn’t recognize the LLC as separate from you, transferring assets from yourself to your single-member LLC is generally not a taxable event.
Self-employment tax works the same way. As the owner of a disregarded single-member LLC, you pay self-employment tax on your net business earnings just as you did before.6Internal Revenue Service. Limited Liability Company – Possible Repercussions
You aren’t stuck with disregarded status. An LLC can file Form 8832 to elect to be taxed as a corporation.7Internal Revenue Service. About Form 8832, Entity Classification Election Or it can file Form 2553 to elect S-corporation tax treatment, which can reduce self-employment tax for owners who pay themselves a reasonable salary and take the rest of the profit as distributions. For a new LLC, Form 2553 must be filed within two months and 15 days of the date the LLC begins its first tax year.8Internal Revenue Service. Instructions for Form 2553 The S-corp election adds payroll obligations and extra filings, so it’s a decision worth running through with a tax professional before you check the box.
Keep Your Liability Protection Intact
The whole reason for converting is liability protection. That protection isn’t automatic and it isn’t permanent. Courts can “pierce the veil” of an LLC and hold you personally liable if you run the business as an extension of yourself. The usual mistakes:
- Commingling funds: paying personal expenses from the business account, depositing business revenue into a personal account, or moving money back and forth without documentation.
- Undercapitalization: forming the LLC without putting enough money or assets into it to cover foreseeable operating costs and liabilities.
- Skipping formalities: no operating agreement, no records of major business decisions, no separation between business and personal bookkeeping.
- Using LLC assets personally: paying for vacations, personal vehicles, or home expenses through the business without documentation and a real business purpose.
One limit catches many new owners off guard. Converting to an LLC does not shield you from debts or legal claims that arose while you were a sole proprietor. The liability shield only applies to obligations the LLC takes on after it’s properly formed. If you’re converting because you already face significant debts or a potential lawsuit, the LLC won’t help with those existing claims.
Ongoing State Obligations
After formation, most states require LLCs to file periodic reports to stay in good standing. These are usually annual, though some states require them every two years. The reports confirm basic details such as the LLC’s address, registered agent, and members or managers. Fees vary, and missing a deadline can bring penalties or even administrative dissolution.
Some states also charge a franchise tax or privilege tax on LLCs, calculated on revenue, net worth, or as a flat fee. Factor those recurring costs into your budget before you convert. They’re an ongoing expense you didn’t carry as a sole proprietor, and they’re part of the real price of the liability protection you’re buying.