Where an LLC owner reports profits and losses depends entirely on how the IRS classifies the LLC. A single-member LLC reports on Schedule C attached to the owner’s Form 1040. A multi-member LLC files its own Form 1065 and issues each owner a Schedule K-1, which the owner then reports on Schedule E of Form 1040. An LLC that has elected corporate treatment files either Form 1120-S (S-corporation) or Form 1120 (C-corporation), with different downstream consequences for the owner’s personal return.
Single-Member LLCs: Schedule C on Your 1040
The IRS classifies a single-member LLC as a “disregarded entity,” which means the agency ignores the LLC structure for federal income tax purposes and treats the owner as a sole proprietor.1Internal Revenue Service. Single Member Limited Liability Companies The LLC files no separate federal income tax return. All business income and expenses flow directly onto the owner’s personal return.
For most single-member LLCs, that reporting happens on Schedule C (Profit or Loss From Business), attached to Form 1040.2Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship) Schedule C captures gross revenue, subtracts allowable business expenses, and produces a net profit or loss. That bottom-line number then appears on Form 1040 as income, or as a loss that may offset other income.
Two activities take a different schedule. If the LLC’s main function is holding rental real estate, the owner reports income and expenses on Schedule E (Supplemental Income and Loss).3Internal Revenue Service. About Schedule E (Form 1040) If the LLC runs a farming operation, the owner uses Schedule F (Profit or Loss From Farming).4Internal Revenue Service. About Schedule F (Form 1040), Profit or Loss From Farming
Multi-Member LLCs: Form 1065 and Schedule K-1
An LLC with two or more owners is automatically classified as a partnership for federal tax purposes unless it elects otherwise.5Internal Revenue Service. LLC Filing as a Corporation or Partnership Reporting works in two steps: the LLC files an informational return, then each owner reports an individual share.
The LLC Files Form 1065
The LLC files Form 1065 (U.S. Return of Partnership Income), reporting all the business’s income, deductions, gains, and losses for the year.6Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income Form 1065 is informational only. The LLC itself does not pay federal income tax. The return calculates the total pool of profits or losses that will be split among the owners.
Owners Report Their K-1 on Schedule E
The LLC issues each owner a Schedule K-1, showing that owner’s allocated share of income, deductions, and credits based on the operating agreement.6Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income The owner then takes the K-1 figures and reports them on Schedule E, Part II of their personal Form 1040.
Each partner must separately account for their share of capital gains, charitable contributions, foreign taxes, and ordinary business income, because each category gets different treatment on the personal return.7Office of the Law Revision Counsel. 26 USC 702 – Income and Credits of Partner
You Owe Tax on Your Share Even If No Cash Was Distributed
Partnership taxation catches people off guard here. You owe tax on your full distributive share of the LLC’s profits whether or not the LLC actually distributed any cash to you. If the LLC earned $200,000 and your share is 50%, you owe tax on $100,000 even if every dollar stayed in the business bank account. The tax code looks at your allocated share, not what you physically received.7Office of the Law Revision Counsel. 26 USC 702 – Income and Credits of Partner Well-drafted operating agreements address this by requiring minimum distributions to cover each owner’s tax bill.
LLCs That Elect S-Corporation Status
An LLC can opt out of its default classification by filing Form 8832 (Entity Classification Election) to be taxed as a corporation, or Form 2553 to specifically elect S-corporation treatment.8Internal Revenue Service. About Form 8832, Entity Classification Election To take effect for the current year, Form 2553 must generally be filed within two months and 15 days of the start of the tax year.
An S-corporation LLC files Form 1120-S (U.S. Income Tax Return for an S Corporation), due March 15 for calendar-year filers.9Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation10Internal Revenue Service. Starting or Ending a Business 3 Like a partnership, the S-corp itself doesn’t pay federal income tax. It issues a Schedule K-1 to each owner, who reports the income on Schedule E, Part II of Form 1040.
What changes is how active owners are compensated. The IRS requires owner-employees who perform substantial services to receive “reasonable compensation” through W-2 wages, subject to normal payroll taxes.11Internal Revenue Service. S Corporation Employees, Shareholders and Corporate Officers Remaining profits distributed through the K-1 are not subject to self-employment tax. That split between salary and distributions is the main reason LLCs elect S-corp treatment. Setting the salary artificially low to maximize tax-free distributions is the most common audit trigger for S-corps, and the IRS weighs factors like comparable pay for similar roles, the time and effort you devote, and your training and experience.
LLCs That Elect C-Corporation Status
An LLC that elects C-corporation status files Form 1120 (U.S. Corporation Income Tax Return) and becomes a separate taxpaying entity.12Internal Revenue Service. About Form 1120, U.S. Corporation Income Tax Return The corporation pays federal income tax on its profits at a flat 21% rate.13GovInfo. 26 USC 11 – Tax Imposed Profits and losses do not pass through to the owner’s personal return at all.
The owner only reports corporate income personally when the corporation actually pays it out. A salary generates a W-2, taxed as ordinary income with standard payroll taxes. Dividends paid from the corporation’s after-tax profits generate a Form 1099-DIV and are taxed again at the owner’s qualified dividend rate. This double taxation is the defining downside: the corporation pays 21% on the profits, then the owner pays a second layer (typically 15% or 20%) when receiving those profits as dividends.
Losses generated by a C-corporation stay trapped at the entity level. They cannot offset the owner’s personal wages, investment income, or other earnings on Form 1040. The corporation can carry those losses forward to offset its own future profits, but the owner gets no immediate personal tax benefit.
Self-Employment Tax by Classification
The reporting form determines the self-employment tax exposure. Net profit from Schedule C triggers self-employment tax at a combined rate of 15.3%: 12.4% for Social Security on net earnings up to $184,500 in 2026, and 2.9% for Medicare on all net earnings with no cap.14Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings for Social Security15Internal Revenue Service. Schedule SE (Form 1040) – Self-Employment Tax The IRS first reduces net profit by 7.65% before applying these rates. Half of the calculated self-employment tax is then deductible as an adjustment to income on Schedule 1.
High earners face an additional 0.9% Medicare surtax on self-employment income above $200,000 for single filers or $250,000 for married couples filing jointly, calculated on Form 8959.16Internal Revenue Service. Topic No. 560, Additional Medicare Tax
Rental income reported on Schedule E generally escapes self-employment tax because the IRS treats rental activity as passive. In a multi-member LLC, an active member’s share of ordinary business income counts as self-employment income at the same 15.3% rate, and guaranteed payments for services also trigger it. Federal tax law provides an exception for limited partners, whose distributive share (other than guaranteed payments for services) is excluded from self-employment tax.17Office of the Law Revision Counsel. 26 USC 1402 – Definitions The IRS has not issued final regulations defining who qualifies as a “limited partner” in an LLC context, so aggressive positions here invite audit risk.
Loss Limitations Can Delay the Deduction
When an LLC loses money, owners naturally want to deduct those losses against their other income. Several layers of federal rules can delay or limit that deduction, applied in a specific order: basis first, then at-risk, then passive activity.
You can only deduct LLC losses up to your adjusted basis in the LLC. For a partnership-taxed LLC, basis starts with what you contributed, increases with your share of profits and additional contributions, and decreases with distributions and loss deductions. If the LLC allocates you $50,000 in losses but your basis is only $30,000, you can deduct $30,000 this year. The remaining $20,000 is suspended and carries forward until your basis increases.18Office of the Law Revision Counsel. 26 USC 704 – Partner’s Distributive Share
Even with sufficient basis, the at-risk rules prevent you from deducting losses beyond the amount you actually stand to lose financially, which matters when the LLC carries nonrecourse debt. The passive activity rules then prevent owners who don’t materially participate from deducting passive losses against active income like wages or Schedule C profits. Passive losses can generally only offset passive income; unused passive losses carry forward indefinitely and are fully released when you sell your entire interest in the LLC.
State Filings Sit Alongside the Federal Ones
Federal reporting is only half the picture. Most states impose their own income tax filing requirements on LLCs and their owners, and these requirements don’t always mirror the federal system. Several states require a separate partnership return even for LLCs that are disregarded entities federally, and some require filings from out-of-state LLCs when a member resides in the state or income is sourced there.
Many states also charge an annual fee, franchise tax, or registration renewal fee for the privilege of operating within their borders, often regardless of whether the LLC earned a profit. State LLC fees and franchise taxes are deductible as ordinary business expenses on the LLC’s federal return (Schedule C for single-member LLCs, Form 1065 for multi-member LLCs). They are business deductions, not personal itemized deductions, so the $10,000 state and local tax cap on Schedule A does not apply to them.
Filing Deadlines by Form
Missing a filing deadline triggers penalties and interest that compound quickly, and for multi-member LLCs, late penalties are multiplied by the number of owners. Deadlines for calendar-year filers:
- Form 1065 (partnership): March 15, with a six-month extension available to September 15.19Internal Revenue Service. Instructions for Form 1065
- Form 1120-S (S-corporation): March 15, with a six-month extension to September 15.10Internal Revenue Service. Starting or Ending a Business 3
- Form 1120 (C-corporation): April 15, with a six-month extension to October 15.
- Form 1040 (personal return with Schedule C, E, or K-1 income): April 15, with a six-month extension to October 15.20Internal Revenue Service. Publication 509 (2026), Tax Calendars
The sequencing is deliberate. Partnership and S-corp returns are due a full month before personal returns so the LLC can issue K-1s in time. When an LLC extends its Form 1065 or 1120-S, its owners often need to extend their personal returns too, because Schedule E cannot be finalized without the K-1. Estimated tax payments remain due on the original deadlines even when a return is extended.