Do LLCs File Tax Returns? Forms, Deadlines, and Penalties

Yes, LLCs do file tax returns, but the IRS does not have an “LLC return.” Instead, every LLC files under one of four classifications: a single-member LLC reports on Schedule C of the owner’s Form 1040, a multi-member LLC files Form 1065 as a partnership, and an LLC that has elected corporate treatment files either Form 1120 (C corporation) or Form 1120-S (S corporation). Which return you owe depends on how many members the LLC has and whether it has made an election to be taxed as a corporation.1Internal Revenue Service. Limited Liability Company (LLC)

Single-Member LLCs

A single-owner LLC that has not elected corporate treatment is a “disregarded entity” for federal income tax. The IRS treats the owner and the business as the same taxpayer, so there is no separate business return. You report gross receipts, cost of goods sold, and operating expenses on Schedule C, and the net profit or loss carries to your Form 1040.2Internal Revenue Service. Single Member Limited Liability Companies

On top of income tax, you owe self-employment tax on the net earnings. The rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare. You calculate it on Schedule SE and can deduct half of the self-employment tax on your Form 1040.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)

Multi-Member LLCs

An LLC with two or more members that has not elected corporate treatment is classified as a partnership and files Form 1065, U.S. Return of Partnership Income. The 1065 is informational. The LLC itself does not pay income tax on it; the return reports total income, deductions, and credits, and allocates each member’s share.4Internal Revenue Service. LLC Filing as a Corporation or Partnership

Each member receives a Schedule K-1 showing their portion of profits, losses, and credits based on the operating agreement, and reports those amounts on their personal return. Active members owe self-employment tax on their share of net earnings at the same 15.3% rate.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)

LLCs Taxed as Corporations

An LLC can elect out of its default classification. Filing Form 8832 elects C corporation treatment. Filing Form 2553 elects S corporation treatment and is itself treated as an election to be a corporation, so no separate 8832 is required.5Internal Revenue Service. Entities 3

C Corporation

An LLC taxed as a C corporation files Form 1120. The business pays a flat 21% federal corporate income tax on its taxable income, and distributions to members are generally taxed again on their personal returns as dividends.6Internal Revenue Service. 2025 Instructions for Form 1120 Attach a copy of the Form 8832 election to the Form 1120 for the year the election takes effect.

S Corporation

An LLC taxed as an S corporation files Form 1120-S. Like the partnership return, it is informational; income passes through to members on Schedule K-1.7Internal Revenue Service. Instructions for Form 1120-S Members who work in the business must be paid a reasonable salary, on which the corporation withholds payroll taxes. Profits distributed beyond that salary are not subject to self-employment tax.8Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues The IRS reviews these salaries closely, and can reclassify distributions as wages if compensation is set too low.

To make the S election effective for the current tax year, Form 2553 must be filed no later than two months and 15 days after the beginning of that year, or any time during the preceding tax year.9Internal Revenue Service. Publication 509 (2026), Tax Calendars

Filing Deadlines

For calendar-year LLCs, the deadlines break down by return:

Six-month extensions are available. Individual filers use Form 4868, which moves the deadline to October 15.10Internal Revenue Service. Application for Automatic Extension of Time to File U.S. Individual Income Tax Return Partnerships, S corporations, and C corporations use Form 7004.11Internal Revenue Service. About Form 7004, Application for Automatic Extension of Time to File Certain Business Income Tax, Information, and Other Returns An extension gives you more time to file, not more time to pay. Any tax owed is still due on the original date, and interest accrues on the unpaid balance.

Quarterly Estimated Payments

LLC income is generally not subject to withholding, so most owners have to send estimated payments during the year. You owe them if you expect to owe at least $1,000 for the year after withholding and refundable credits. For 2026, payments are due April 15, June 15, September 15, and January 15, 2027. You can skip the January payment if you file your full 2026 return and pay any balance by February 1, 2027.12Internal Revenue Service. Form 1040-ES (2026), Estimated Tax for Individuals

To avoid the underpayment penalty, pay at least 90% of the current year’s tax or 100% of the prior year’s tax. The prior-year figure rises to 110% if your adjusted gross income exceeded $150,000.13Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty

Penalties for Missing the Deadline

The penalty for a late partnership or S corporation return is $255 per month (or partial month) for each partner or shareholder, for up to 12 months. A four-member LLC that files its 1065 three months late faces $3,060 ($255 × 4 × 3). The penalty does not apply if the LLC shows reasonable cause.14Internal Revenue Service. Failure to File Penalty15Office of the Law Revision Counsel. 26 U.S. Code 6698 – Failure to File Partnership Returnp>

For individual returns (including a single-member LLC’s Schedule C), the failure-to-file penalty is 5% of unpaid tax per month, capped at 25%. If the return is more than 60 days late, the minimum penalty is the lesser of $525 or 100% of the unpaid tax.14Internal Revenue Service. Failure to File Penalty

The failure-to-pay penalty is separate: 0.5% of unpaid tax per month, up to 25%, dropping to 0.25% per month if you have an approved IRS payment plan.16Internal Revenue Service. Failure to Pay Penalty

Two Situations Worth Flagging

If the sole owner of a single-member LLC is a non-U.S. person, the LLC has an extra return to file even though it is a disregarded entity. It must file Form 5472 attached to a pro forma Form 1120 to report transactions with the foreign owner.17Internal Revenue Service. Instructions for Form 5472 Missing this filing costs $25,000 per form, with another $25,000 added for each 30-day period the failure continues after IRS notice, with no cap.18Internal Revenue Service. International Information Reporting Penalties

Federal filings are also only half the picture. Most states require LLCs to file annual or biennial reports and may charge separate franchise or privilege taxes. Deadlines and fees vary, so check with your state’s secretary of state office.