How to Report LLC Income: Forms, Deadlines, and Classifications

To report LLC income to the IRS, you file based on how your LLC is classified for tax purposes: a single-member LLC reports on Schedule C attached to the owner’s Form 1040, a multi-member LLC files Form 1065 and issues Schedule K-1s to each member, and an LLC that has elected corporate treatment files Form 1120 (C-corp) or Form 1120-S (S-corp).1Internal Revenue Service. Limited Liability Company (LLC) The IRS does not have a separate tax category for LLCs, so your filing path, deadline, and additional obligations all trace back to that classification.

Figure Out Your LLC’s Tax Classification First

A single-member LLC is treated as a “disregarded entity.” The IRS looks past the LLC and taxes the owner directly.2Internal Revenue Service. Single Member Limited Liability Companies An LLC with two or more members defaults to partnership status.3Internal Revenue Service. LLC Filing as a Corporation or Partnership

Either type can opt out of the default. Filing Form 8832 elects C-corporation treatment; filing Form 2553 elects S-corporation treatment.4Internal Revenue Service. About Form 8832, Entity Classification Election Once made, an election generally locks in for 60 months.5Internal Revenue Service. Form 8832 Entity Classification Election If you have not filed either form, you are on the default track and should file accordingly.

Before you touch any return, pull together gross income records and documentation for every deductible expense. Supporting documents must show the payee, amount paid, date, and business purpose.6Internal Revenue Service. What Kind of Records Should I Keep You will also need your EIN, your LLC’s legal name and address, and your six-digit NAICS code for the top of the return.7Internal Revenue Service. Publication 583, Starting a Business and Keeping Records Verify the EIN against your original IRS confirmation letter; mismatches delay processing.

Single-Member LLC: Schedule C on Your Personal Return

As the sole owner, you report the LLC’s income directly on your Form 1040 using Schedule C, Profit or Loss from Business.2Internal Revenue Service. Single Member Limited Liability Companies There is no separate business return. Schedule C is where you list gross receipts, subtract expenses, and arrive at net profit or loss.

That net figure moves to Schedule 1 of Form 1040 and then into your total income. The income is taxed at your personal rates, which for 2026 run from 10% to 37%.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Underreporting income or overstating deductions can trigger an accuracy-related penalty of 20% of the underpayment.9Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments

Multi-Member LLC: Form 1065 and Schedule K-1s

A multi-member LLC files Form 1065, an informational return. The LLC itself pays no tax on it. Form 1065 reports the business’s total income, deductions, and credits.3Internal Revenue Service. LLC Filing as a Corporation or Partnership

The LLC then issues each member a Schedule K-1 showing that member’s share of profits, losses, and deductions. Each member carries the K-1 amounts to Schedule E of their personal Form 1040. Allocations usually follow ownership percentages, though the operating agreement can specify different splits.

K-1s must reach members by the 15th day of the third month after the tax year ends, which is March 15 for a calendar-year LLC. Filing Form 1065 late costs $255 per partner for each month the return is overdue, up to 12 months.10Internal Revenue Service. Failure to File Penalty A five-member LLC racks up $1,275 for every month of delay. Multi-member LLCs get caught here often because owners assume that no entity-level tax means no urgency. The penalty schedule says otherwise.

If You Elected Corporate Tax Treatment

C-Corporation (Form 1120)

An LLC that elected C-corp status on Form 8832 files Form 1120.4Internal Revenue Service. About Form 8832, Entity Classification Election The LLC pays the flat 21% federal corporate rate on its net income. Profits distributed to members as dividends are taxed again on the members’ personal returns.

S-Corporation (Form 1120-S)

An LLC that elected S-corp status on Form 2553 files Form 1120-S and issues K-1s to members, who then report their share on their personal returns, similar to partnership treatment.11Internal Revenue Service. About Form 2553, Election by a Small Business Corporation To take effect for the current year, Form 2553 must be filed no later than two months and 15 days after the tax year begins, or any time during the preceding tax year.12Internal Revenue Service. Instructions for Form 2553

If you work in your S-corp LLC, you must pay yourself a reasonable salary before taking additional distributions. Courts have held that an owner performing services for the S-corp must receive wages subject to employment taxes, regardless of what the payments are called.13Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers

Self-Employment Tax

Income tax is only part of what LLC owners owe. Most also owe self-employment tax, which funds Social Security and Medicare, at a combined 15.3% rate: 12.4% for Social Security and 2.9% for Medicare.14Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) The tax kicks in when your net self-employment earnings hit $400 for the year.15IRS.gov. Instructions for Schedule SE (Form 1040)

The Social Security portion applies only to the first $184,500 of combined wages and self-employment income for 2026.16Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings The Medicare portion has no cap. You calculate the tax on Schedule SE and attach it to Form 1040. You can deduct half of your SE tax when computing adjusted gross income, which lowers your income tax.

SE tax applies to single-member LLC owners filing Schedule C and to members of multi-member LLCs taxed as partnerships. S-corp owners handle Social Security and Medicare through payroll on their salary instead, which is one reason higher earners sometimes make the S-corp election.

Quarterly Estimated Tax Payments

LLC owners generally have no employer withholding tax from their pay, so the IRS expects payment as income is earned. You need to make estimated quarterly payments if you expect to owe $1,000 or more when you file.17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty

For 2026, the due dates are:18IRS.gov. Form 1040-ES – Estimated Tax for Individuals

  • April 15, 2026 (Q1)
  • June 15, 2026 (Q2)
  • September 15, 2026 (Q3)
  • January 15, 2027 (Q4)

You can skip the January payment if you file the full 2026 return and pay the balance by February 1, 2027. To avoid the underpayment penalty, pay at least 90% of the current year’s tax or 100% of last year’s, whichever is less. If your prior-year AGI exceeded $150,000 ($75,000 if married filing separately), the prior-year safe harbor rises to 110%.17Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty

The Qualified Business Income Deduction

LLC owners whose income passes through to their personal returns may qualify for a deduction of up to 20% of qualified business income under Section 199A. The deduction was originally set to expire after 2025 but has been permanently extended.19Internal Revenue Service. Qualified Business Income Deduction It applies to sole proprietorships, partnerships, and S-corporations, which covers all three pass-through paths an LLC can take.

The full deduction is available below certain taxable income thresholds. Above those thresholds, limits based on W-2 wages the business pays and the value of qualified property phase in, and service businesses like law, accounting, and consulting face additional restrictions at higher income levels.19Internal Revenue Service. Qualified Business Income Deduction The deduction is taken on your personal return and reduces taxable income, not adjusted gross income, so it does not shrink your self-employment tax.

If Your LLC Paid Contractors

If your LLC paid any non-employee $600 or more for services during the year, you must issue Form 1099-NEC to the recipient and file a copy with the IRS by January 31.20Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Payments to attorneys require a 1099-NEC even if the attorney is incorporated. Payments to a corporation, including an LLC that elected C-corp or S-corp treatment, generally do not require one. That is why contractors routinely ask for a W-9 before getting paid.

Deadlines and Extensions

Assuming a calendar tax year:

Partnerships and S-corps file earlier because members need their K-1s to complete their personal returns. Business returns (Forms 1065, 1120, and 1120-S) use Form 7004 for an automatic six-month extension.24Internal Revenue Service. About Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns Individual returns use Form 4868 for the same six months. An extension buys time to file, not time to pay. If you owe and do not pay by the original due date, interest and late-payment penalties start running even with a valid extension.

How to Submit the Return

Most LLC owners e-file through an IRS-authorized provider or commercial tax software. You sign electronically with a five-digit PIN; the IRS authenticates you by matching your date of birth and prior-year adjusted gross income.25Internal Revenue Service. Self-Select PIN Method for Forms 1040 and 4868 Modernized e-File (MeF) Electronic returns typically process in about 21 days. Paper filing remains available; the correct mailing address depends on your state and whether a payment is enclosed, and processing runs six weeks or longer. Sending paper by certified mail with a return receipt gives you proof of the filing date if a deadline is close.