A two-member LLC files federal taxes based on how the IRS classifies it. By default that classification is a partnership, which means the LLC files Form 1065, issues each member a Schedule K-1, and each member reports their share of the income on their personal Form 1040. The members can instead elect to have the LLC taxed as an S-corporation or a C-corporation, which changes the forms and the way members are paid. For most two-person LLCs, the real decision is partnership versus S-Corp, and it comes down to self-employment tax.
The Default: Filing as a Partnership
The IRS automatically treats a domestic LLC with two or more members as a partnership.1Internal Revenue Service. LLC Filing as a Corporation or Partnership You don’t file anything to accept the default. It’s the simplest option and the one most two-member LLCs stick with.
Each year the LLC files Form 1065, U.S. Return of Partnership Income.2Internal Revenue Service. 2025 Instructions for Form 1065 – U.S. Return of Partnership Income This is an informational return. The partnership itself pays no federal income tax. Form 1065 calculates the LLC’s total income, deductions, and credits, then passes everything through to the members.
Each member receives a Schedule K-1 (Form 1065) showing their share of income, losses, deductions, and credits. Shares are allocated according to the LLC’s operating agreement — if the agreement gives Member A 60% and Member B 40%, the K-1s reflect that split. When the agreement is silent on allocation, most states default to equal shares.
Each member then takes their K-1 figures and reports them on Schedule E (Form 1040), Supplemental Income and Loss, as part of their personal tax return.3Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040) – Introductory Material The income is taxed once, at the member’s individual rate.
Married Couples in Community Property States
If the two members are spouses in a community property state, they have an extra option. Under IRS Revenue Procedure 2002-69, a husband and wife who wholly own an LLC as community property can treat it as a disregarded entity instead of a partnership.4Internal Revenue Service. Revenue Procedure 2002-69 – Classification of Certain Business Entities Each spouse then reports their share directly on Schedule C with no Form 1065 and no K-1s. Both spouses still pay self-employment tax on their respective shares. The community property states are Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin.
Electing S-Corporation Treatment
If partnership treatment doesn’t suit the business, the members can file IRS Form 2553, Election by a Small Business Corporation, to have the LLC taxed as an S-Corp.5Internal Revenue Service. About Form 2553, Election by a Small Business Corporation Income still passes through to the members’ personal returns with no entity-level tax, but active members split their compensation between W-2 wages and distributions. That split can reduce self-employment tax, which is the main reason to make the election.
An LLC that has elected S-Corp status files Form 1120-S, U.S. Income Tax Return for an S Corporation, instead of Form 1065.6Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation Members still receive a K-1 (this time Schedule K-1 of Form 1120-S) and still report that income on Schedule E of their 1040.
Timing matters. Form 2553 must be filed no later than two months and 15 days after the start of the tax year the election takes effect, which is March 15 for a calendar-year LLC.7Internal Revenue Service. Instructions for Form 2553 You can also file it anytime during the prior tax year. Miss the window and you’re stuck with partnership treatment for the current year unless you qualify for late-election relief.
Eligibility rules also apply. The LLC can have no more than 100 shareholders, all shareholders must be U.S. citizens or residents (no partnerships or corporations as owners), and the entity can have only one class of stock.8Internal Revenue Service. S Corporations These limits rarely cause problems for a two-person LLC, but check them before filing.
Reasonable Compensation
Once the S-Corp election is in place, any member who works for the business must receive a salary paid as W-2 wages before the LLC distributes any remaining profits.9Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues That salary must be “reasonable compensation” — what a comparable business would pay someone with similar training, duties, and experience.
The IRS looks at where the company’s revenue comes from. If most of the gross receipts come from the shareholder’s personal services, most of the income should be classified as wages. Setting an artificially low salary to dodge employment taxes is the fastest way to draw an audit; the IRS has authority to reclassify distributions as wages and assess back taxes plus penalties.
A C-Corp election is also available on Form 8832, but it creates double taxation — the entity pays corporate income tax and members pay again on distributions — and few small LLCs choose it.10Internal Revenue Service. Form 8832 Entity Classification Election
Self-Employment Tax: Why the Classification Matters
This is where the choice hits hardest. The self-employment tax rate is 15.3% — 12.4% for Social Security and 2.9% for Medicare.11Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) The Social Security portion applies to net earnings up to $184,500 in 2026; the Medicare portion has no cap.12Social Security Administration. Contribution and Benefit Base
When the LLC is taxed as a partnership, each member’s entire share of ordinary business income is generally subject to that 15.3% self-employment tax.13Internal Revenue Service. Entities 1 Members calculate it on Schedule SE (Form 1040) using the net earnings from their K-1.
Under S-Corp treatment, only the W-2 wages are subject to FICA (the employer and employee each pay 7.65%, totaling the same 15.3%). The remaining K-1 distributions escape self-employment tax entirely. For an LLC earning $300,000 where two members each take $60,000 in salary and $90,000 in distributions, the S-Corp election saves roughly $13,770 per member compared to partnership treatment, before accounting for the extra payroll costs and tax preparation the S-Corp requires.
The math gets less attractive as income drops. If total LLC income is under roughly $80,000 to $100,000, payroll administration, additional preparation fees, and reasonable-compensation constraints tend to eat up the savings. Partnership taxation is usually the simpler and better option at that level.
What Each Member Owes Personally
Quarterly Estimated Tax Payments
Because LLC income passes through and no one withholds taxes from distributions or K-1 income, each member has to make quarterly estimated payments covering both income tax and self-employment tax. Underpaying triggers a penalty.
Payments are due four times a year:14Internal Revenue Service. Estimated Tax
- April 15, covering January through March
- June 15, covering April through May
- September 15, covering June through August
- January 15 of the following year, covering September through December
You can avoid the underpayment penalty by paying at least 90% of the current year’s total tax liability or 100% of the prior year’s tax, whichever is less. If your adjusted gross income exceeded $150,000 in the prior year ($75,000 if married filing separately), the prior-year threshold rises to 110%.15Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Members who also hold a W-2 job elsewhere can sometimes cover the shortfall by increasing withholding at that other employer instead of writing quarterly checks.
Qualified Business Income Deduction
Members may qualify for a deduction worth up to 23% of their qualified business income under Section 199A, as extended and expanded by the One Big Beautiful Bill Act for tax years beginning in 2026. The deduction is claimed on the member’s personal return, not on the LLC’s return, and it applies whether the LLC is taxed as a partnership or an S-Corp.16Internal Revenue Service. Qualified Business Income Deduction
The full deduction is available to single filers with taxable income below $200,000 and married-filing-jointly filers below $400,000. Above those thresholds, it phases out, particularly for service-based businesses such as law firms, medical practices, and consulting companies. The phase-out range runs to $275,000 for single filers and $550,000 for joint filers; beyond those amounts, service businesses lose the deduction entirely. Check eligibility each year — the thresholds adjust for inflation.
Deadlines, Extensions, and Late-Filing Penalties
Both Form 1065 (partnership) and Form 1120-S (S-Corp) are due by March 15 for calendar-year LLCs.17Internal Revenue Service. Starting or Ending a Business 3 The LLC must furnish each member’s K-1 by the same date so members can file their personal returns by April 15.
Filing Form 7004 grants an automatic six-month extension, pushing the LLC’s deadline to September 15.18Internal Revenue Service. Instructions for Form 7004 That extends the filing deadline only, not the time to pay. Any taxes the members owe based on the LLC’s income are still due by their individual deadlines, and interest accrues on unpaid amounts.
Missing the deadline without an extension gets expensive fast. For partnership returns due after December 31, 2025, the IRS charges $255 per partner for each month or partial month the return is late, up to 12 months.19Internal Revenue Service. Failure to File Penalty For a two-member LLC that’s $510 a month, even if the LLC owes no tax. One day late counts as a full month. The penalty for a late 1120-S works the same way — $255 per shareholder per month, up to 12 months.20Internal Revenue Service. Instructions for Form 1120-S (2025) A two-member S-Corp six months late without an extension faces $3,060 in penalties before interest or any tax-due penalties.
Other Requirements
Employer Identification Number
A two-member LLC needs its own EIN from the IRS, whether it’s taxed as a partnership or an S-Corp. You can apply for free on the IRS website and receive the number immediately. The EIN goes on every return the LLC files and is required before the LLC can open a business bank account or hire employees.
Electronic Filing
Partnerships that file 10 or more total returns during the tax year — counting income, employment, excise, and information returns combined — must file Form 1065 and related schedules electronically.2Internal Revenue Service. 2025 Instructions for Form 1065 – U.S. Return of Partnership Income A two-member LLC with employees can easily hit that threshold once W-2s, 1099s, and quarterly payroll filings are counted. Most tax software and preparers file electronically by default even if you’re under the threshold.
State Filings
Federal filing is only half the picture. Most states require LLCs to file an annual or biennial report and pay a filing fee, and many impose their own income or franchise taxes on the entity or its members. These state-level costs and deadlines vary widely and are separate from the federal return. Check with your state’s secretary of state and department of revenue early in the year.