Solopreneurs often have questions on how to incorporate a business, from which entity to choose to what it will cost and when the tax benefits begin. This guide walks through the full process step by step: choosing an entity type, picking a state, filing formation documents, getting an EIN, handling the setup after filing, and making the S-Corp tax election. It explains why forming an LLC and choosing how it's taxed are two separate decisions, breaks down real state-by-state costs, and shows where the S-Corp election fits to turn a new entity into actual tax savings.
Most solopreneurs incorporate for the wrong reason, or at least an incomplete one. They hear "liability protection," file an LLC online in about nine minutes, and assume the tax part takes care of itself. It does not. Forming an entity and choosing how that entity is taxed are two separate decisions, made with two separate agencies, on two separate timelines. Getting the first one right and ignoring the second is how people end up with a legal shell and the same tax bill they had as a sole proprietor.
This guide is for one-person businesses that are ready to form an entity and want to understand the full sequence before they start. Most of the filing is simple enough to handle yourself, and we'll show you how. The tax side is where DIY tends to break down: which election to make, when to make it, and what salary to set. That's where we'll point out when an expert is worth the call.
Here is the distinction that clears up most of the confusion.
Formation is a state matter. You file paperwork with the Secretary of State, and a legal entity comes into existence. That entity is separate from you, which is where liability protection comes from.
Tax classification is a federal matter. The IRS does not have an "LLC" category. Per IRS guidance on LLC classification, an LLC is classified for federal tax purposes as a corporation, a partnership, or a disregarded entity. A single-member LLC defaults to disregarded entity status, meaning you report the business on Schedule C of your personal return exactly as you did before, and pay self-employment tax on every dollar of net profit. A multi-member LLC defaults to partnership treatment.
So "I incorporated" tells you almost nothing about someone's tax situation. The entity is the container. The election determines what happens inside it.
One useful wrinkle: even a disregarded single-member LLC is treated as a separate entity for employment tax purposes and must use its own EIN for payroll filings. The disregard stops at income tax.
Not everyone does, and not everyone does yet.
The two honest reasons to form one:
Reasons that sound good but are usually not decisive on their own: looking more legitimate, opening a business bank account (a sole proprietor with an EIN can do that), or writing off expenses (a Schedule C sole proprietor can deduct ordinary and necessary business expenses, too).
If neither reason applies yet, "not yet" is a valid answer. If the second reason applies, keep reading, because the sequencing matters.
For a solopreneur, the realistic shortlist is short.
LLC. Flexible, cheap to form in most states, minimal formalities, and it can be taxed four different ways. This is the default choice for the vast majority of one-person service businesses.
Corporation. More formality: bylaws, a board, minutes, stock. A corporation is automatically taxed as a C-corp unless it elects S-Corp status. For a solo consultant with no outside investors, the added formality rarely buys anything an LLC does not already provide.
Professional entity (PLLC or PC). Required in some states for licensed professions such as medicine, law, accounting, and architecture. Check your state's rules before filing anything.
The thing to internalize: choosing "LLC" does not commit you to a tax outcome. An LLC can be taxed as a disregarded entity, a partnership, a C-corp, or an S-Corp. You are choosing a container, and you can change what happens inside it later. For a deeper comparison, see how to choose the right business structure.
Every year, thousands of solopreneurs form a Wyoming or Delaware LLC after reading a blog post about it, then discover the catch.
If you form in one state and actually operate in another, your home state generally requires you to register as a foreign entity there anyway. That means a second filing fee, a second registered agent, and a second set of annual reports for one business. Delaware's own Division of Corporations is transparent about its fee structure, and none of it makes a case for a single-owner consulting practice in Ohio to incorporate in Delaware.
Delaware is genuinely useful if you are raising institutional venture capital, because investors expect Delaware corporate law. Nevada and Wyoming pitch privacy and no state income tax, but you still owe income tax where you live and work. For a one-person business serving clients from your home state, form in your home state.
The filing itself is the easy part.
Free, fast, and directly from the IRS on the IRS EIN page. The IRS is blunt about this: "You never have to pay a fee for an EIN." Online applications are issued immediately once approved.
Three things that trip people up:
The state approved your filing. You are not done.
One item you can now cross off: reporting beneficial ownership information. After several years of shifting deadlines under the Corporate Transparency Act, FinCEN finalized a rule, effective August 14, 2026, exempting U.S.-formed companies from BOI reporting. Per Treasury's announcement, U.S. companies "are no longer required to file BOI reports." Foreign entities registered to do business in a U.S. state still have obligations. Check FinCEN's BOI page for current status before you rely on it.
This is the step that moves money, and the one most people either skip or mistime.
Absent an election, your single-member LLC is a disregarded entity, and you owe self-employment tax on 100% of net profit. Electing S-Corp treatment splits your income into a reasonable salary (subject to payroll taxes) and distributions (not subject to self-employment tax). The savings sit in that second bucket.
Mechanics, straight from the IRS Form 2553 instructions:
Once elected, you have payroll obligations. Shareholder-employees must receive reasonable compensation as W-2 wages, which means Form 941 quarterly (or Form 944 annually if the IRS approves it for very small liabilities) and Form 940 for federal unemployment tax each year. This is real administrative weight, and it is the reason the election is not automatically right at every income level.
Also worth knowing before you model the decision: the Section 199A qualified business income deduction, worth up to 20% of qualified business income for pass-through owners, was made permanent by the 2025 tax law rather than expiring after 2025, and a new minimum deduction of $400 applies for taxpayers with at least $1,000 of QBI beginning in 2026. That changes the arithmetic on the incorporate-or-not question for many solo owners.
State filing fees vary more than people expect, and the recurring costs matter more than the one-time ones.
The short answer: For a single-member LLC formed in your home state, expect roughly $100 to $500 in year one if you act as your own registered agent, and $0 to $300 a year after that in most states. Add $100 to $300 a year for a commercial registered agent. The big exceptions are California, where year one runs about $890 once you add the $800 franchise tax, and New York, where the publication requirement can push the total well past the filing fee.
For most solo owners, the filing fee is the smallest number on this list, so budget for what your state charges every year after.
Three habits separate owners who get value from the entity from owners who just pay fees.
Keep the money separate. Every dollar in and out of the business goes through the business account. Reimburse yourself deliberately rather than swiping the business card at the grocery store.
Keep the entity current. Annual reports, franchise taxes, registered agent, state accounts. Administrative dissolution for a missed report is more common than it should be, and it takes away the liability protection.
Treat tax as a year-round activity. The election is not the finish line. Paying yourself a reasonable salary, quarterly payroll filings, estimated taxes, and retirement contributions all have to be set and adjusted throughout the year. Deciding all of it in March, for a year that already ended, is how the savings evaporate.
*State fees for a single-member LLC, as of September 2026. Excludes registered agent fees, New York newspaper costs, expedited processing, and S-Corp payroll.