Schedule C, 1099 and LLC: the tax words a US solo founder files with

What to take away

Why a solo founder meets four different tax words before April

A founder registers an LLC in Texas, opens a bank account, invoices a client in California, and by February holds three documents that use three different words for the same money. None of those words is the word "income" in the everyday sense. That gap is where filing mistakes start.

The vocabulary splits along two axes. One axis is who pays tax: you, or the entity. The other is who reports the payment: you, or the payer. Schedule C, Form 1099-NEC, Form 1065 and Form 1120 sit at different points on those axes, which is why they look unrelated until you line them up.

A useful habit is to keep revenue and profit apart in your own bookkeeping before the IRS does it for you. The distinction between revenue against income is the same one that decides what lands on line 1 of Schedule C and what lands on line 31.

State registration adds noise. A Massachusetts LLC, an Illinois LLC and a Washington LLC are all state creatures. Federal tax treatment ignores the state certificate and looks at how many owners you have and what elections are on file.

The four words arrive in a fixed order each year. Payments come in during the year. Information returns arrive first, with the 1099-NEC recipient copy due January 31. Partnership and S corporation returns follow on March 16. Your personal return lands on April 15. Knowing the order tells you which document to chase first.

Here is that order as dates, for the 2025 tax year filed in 2026:

A due date that falls on a weekend or a federal holiday moves to the next business day. Confirm the current year at the IRS before you rely on any single date.

Schedule C and the sole proprietor: lines, categories and self-employment tax

Schedule C (Form 1040) is where a sole proprietor reports business profit or loss. It is a two page form attached to your personal return, not a separate business return. One owner, no election, no separate entity: this is the default landing spot.

The form works as a subtraction. Gross receipts go on line 1. Returns and allowances come off. Cost of goods sold comes off. Expenses are grouped by category, and each category has its own line on the form.

The categories are not free-form. The Instructions for Schedule C (Form 1040) (2025) | Internal Revenue Service spell out what belongs in each line and which lines require a separate statement. Meals sit at 50 percent. Home office uses a simplified method or actual expenses. A car uses standard mileage or actual costs, never both.

Line 31 is net profit. That number does three things at once. It flows to Schedule 1 of Form 1040 as business income. It becomes the base for self-employment tax on Schedule SE. It becomes the figure that quarterly estimated payments are built around.

Self-employment tax is the part most founders underprice. The Self-employment tax (Social Security and Medicare taxes) | Internal Revenue Service explains that it funds Social Security and Medicare for people who do not have an employer withholding those amounts. You pay both halves, the employee share and the employer share.

A worked example makes the arithmetic concrete. Suppose net profit on line 31 is 60,000 dollars. Schedule SE multiplies that figure by 92.35 percent, which gives 55,410 dollars. The 15.3 percent rate then applies: 12.4 percent for Social Security and 2.9 percent for Medicare.

Social Security tax stops at the wage base, which is 176,100 dollars for 2025. A net profit of 60,000 dollars stays under that cap, so the full 55,410 dollars is taxed. The bill is about 8,478 dollars.

Two deductions soften the hit. You deduct half of the self-employment tax itself. You may also deduct health insurance premiums and retirement contributions in the right circumstances. Both land on the personal return, not on Schedule C.

Recordkeeping carries the real weight. The IRS wants support for every line, and a bank statement alone rarely proves business purpose. A separate business account, a category for each expense type, and a note on each unusual transaction will do more for you than any software subscription.

A short checklist before you file:

Form 1099-NEC against Form 1099-MISC: who issues which, and when

A 1099 is an information return. It does not calculate your tax. It tells the IRS what someone paid you, so the agency can check your Schedule C against a third party record. Getting one does not mean you owe tax on it, and not getting one does not mean the payment is invisible.

Form 1099-NEC reports nonemployee compensation. A client uses it for payments to an unincorporated contractor for services in a trade or business. The threshold is 600 dollars for the year. Box 1 holds the amount. There is no withholding box for the ordinary case.

Form 1099-MISC reports other categories. Rent, prizes and awards, other income payments, medical and health care payments, crop insurance proceeds, and payments to attorneys appear there.

The General Instructions for Certain Information Returns (2025) | Internal Revenue Service list the payment types and the boxes they belong in, along with the deadlines for sending and filing copies.

The practical difference for a solo founder is the box. If the money was for your labor as a contractor, it is NEC. If it was rent for a room you own, or a prize, it is MISC. The same payer can send you both in one year.

Deadlines matter more than most people expect. A payer must furnish the Form 1099-NEC copy to the recipient by January 31 and file it with the IRS by the same date, on paper or electronically. Form 1099-MISC recipient copies are due January 31 for most boxes.

The IRS copy of Form 1099-MISC is due February 28 on paper or March 31 electronically. If you have not received an expected form by mid February, ask the client. Corrections are routine, but they are easier before you file.

Some payments are outside the system. Payments made through a third party network may be reported on a different form. Payments to a corporation are generally excluded, with exceptions. Reimbursed expenses handled under an accountable plan are not compensation.

Your own filing duty runs the other way. If you hire a contractor for your business, you may have to issue a 1099-NEC yourself. That requires collecting a W-9 before you pay, not after. Chasing a taxpayer identification number in January is the slowest way to run this.

How the IRS classifies an LLC, and when an EIN becomes necessary

The Limited liability company (LLC) | Internal Revenue Service states the position plainly: an LLC is a business structure created under state law, and federal tax law does not recognize it as a separate tax classification. The IRS looks through the LLC to the owners.

The default rule depends on headcount. A single member LLC is disregarded, meaning the owner files as a sole proprietor on Schedule C. A multi member LLC is treated as a partnership by default and files Form 1065. Neither default requires an election form.

An election changes the default. Filing the entity classification election moves an LLC to corporation treatment, either C or S. That single filing rewrites which return you file, whether you run payroll, and how profit reaches your personal return.

State and federal language often collide here. A Colorado LLC that is disregarded for federal tax may still owe state fees, annual reports and a state level business tax. The federal classification is a tax answer, not a compliance answer.

The EIN question comes up next. The IRS page on getting an EIN for solo founder sets out when a number is required, including having employees or filing certain returns. A single member LLC with no employees is not always required to have one. Most founders still get one for practical reasons.

Banks ask for it. Payment processors ask for it. Clients who need to issue a 1099-NEC prefer it over a Social Security number. Getting one is free and takes minutes through the IRS online application.

The online application asks for a responsible party with a valid taxpayer identification number and issues the EIN at the end of the session. Form SS-4, sent by mail or fax, takes several weeks. The IRS charges no fee, and a site that charges one is not the IRS.

A short table of the common positions:

One caution on the word owner. Spouses in a community property state can fall into a different default than spouses elsewhere. State law, not preference, decides.

Form 1065 for partnerships and Form 1120 for C corporations, side by side

Form 1065 is the partnership return. The partnership itself generally pays no federal income tax. It reports income, deductions, credits and separately stated items, then allocates each partner's share on Schedule K-1.

Each partner puts the K-1 figures on their own return. Ordinary business income goes to Schedule E. Self-employment tax applies to a general partner's distributive share, which surprises people who assumed the entity structure removed that tax.

Form 1120 is the C corporation return. Here the entity is the taxpayer. The corporation pays tax on its taxable income, and shareholders pay tax again on dividends. That second layer is the reason the structure is rare for a one person consulting shop.

A C corporation does get a flat federal rate rather than graduated personal brackets, and it can deduct certain fringe benefits that a sole proprietor cannot. It also brings payroll, formal minutes, and a separate set of state filings. The tradeoff is real in both directions.

Timing differs too. Form 1065 and Form 1120-S are due March 16 for a calendar year entity, with the personal return following on April 15. A calendar year Form 1120 is due April 15 as well. Extensions move the date, not the liability.

Separately stated items are the vocabulary trap. A K-1 does not hand you one number. It hands you a page of numbers, each with its own rule, and each landing in a different place on your personal return. Reading only the first box is a common error.

If you are comparing structures, the useful question is not which one saves tax this year. It is which one matches how you take money out, how many owners you have, and how much administrative work you will actually do.

The labels on a K-1 recur in any profit and cash discussion, so a best business vocabulary tools 2027 covers the overlap between filing words and everyday bookkeeping.

S corporation election and the vocabulary that changes with it

The S corporation election is a tax election, not a state business structure. You form an LLC or corporation under state law, then ask the IRS to treat it as an S corporation for federal tax. The entity keeps its state identity.

The election has eligibility rules. A limited number of shareholders, all of them US residents or citizens, one class of stock, and no ineligible owners such as certain trusts or corporations. Miss one and the election fails.

The filing is Form 2553, Election by a Small Business Corporation. A calendar year company must file it by March 15 of the year the election takes effect, or at any point during the prior tax year. Miss the date and the election generally waits until the next tax year unless you request late relief.

What changes is the vocabulary. You become an employee of your own company and take a salary. Payroll taxes are withheld from that salary. The remaining profit passes through to your personal return on a K-1 and is generally not subject to self-employment tax.

That last sentence is where the planning lives. The IRS expects reasonable compensation for the work you actually do. Set the salary too low and you invite a challenge. Set it high and you give back much of the saving in payroll tax.

New obligations arrive with the election. You run payroll, file payroll returns, issue yourself a W-2, and file Form 1120-S with a K-1 for each shareholder. The return is shorter than a C corporation return but the calendar is tighter.

Revoking the election is possible but not instant, and there are limits on how soon you can re elect. Treat the decision as a multi year commitment, not a one year calculation.

A second vocabulary shift concerns distributions. A distribution from an S corporation is not wages and is not a dividend. It reduces your basis in the stock, and once basis is exhausted, it becomes taxable gain. Basis tracking is the part founders neglect.

Before you sign anything, read the business glossary template for teams that will accompany the election, particularly the payroll service contract and the engagement letter from whoever prepares the return. Those documents carry the recurring cost of the structure.

Where SBA guidance and IRS filing language differ

The U.S. Small Business Administration writes for someone choosing a business form. Its pages cover liability, control, taxation and registration. The IRS writes for someone filing a return, in defined terms aimed at a computation. Both are correct, and they answer different questions.

The split shows up in the word partner. In business writing, a partner is anyone you work with. On a K-1, a partner is an owner with a distributive share and a self-employment tax position. Using the everyday sense in a tax conversation causes real errors.

Read SBA and Small Business Development Center material to choose a structure. Read IRS instructions to file it. IRS Publication 334 gathers the sole proprietor rules in one place and uses the same vocabulary as the forms.

Finally, learn the acronyms before a lender or an accountant uses them at you. A working command of the business acronyms every entrepreneur meets on a first return keeps a conversation moving instead of stalling it.

Reading a return is a separate skill from preparing one. The three statements in your bookkeeping answer different questions than the tax return does, and knowing which document answers which question is what makes the vocabulary usable rather than decorative.

Common questions