Federal tax classification

How is an LLC taxed?

Last updated: 2026-05-20

The short version. An LLC is a creature of state law, and "LLC" is not a federal tax classification the IRS recognizes. Every LLC is taxed federally as one of four things: a disregarded entity, a partnership, an S-corporation, or a C-corporation. Disregarded-entity and partnership treatment are the defaults — what you get if you do nothing. S-corp and C-corp treatment require filing Form 2553 or Form 8832 by a specific deadline. The choice has six-figure consequences for any LLC that grows beyond hobby-level income, and the most common mistake is not making one.

Why an LLC has four possible tax treatments

The Limited Liability Company is a state-law construct. Wyoming invented the modern LLC in 1977; the IRS spent a decade after that figuring out how to classify the thing for federal income tax purposes. The compromise, formalized in the "check-the-box" regulations issued in 1996, was to let LLC owners pick the federal tax classification that fits the business. Default rules apply if no election is made.

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The four classifications are the same four available to most other business entities:

  1. Disregarded entity. The LLC does not exist for federal income tax purposes. Income and expenses appear directly on the owner's personal return.
  2. Partnership. The LLC files an informational return; members report their share on personal returns.
  3. S-corporation. The LLC is treated as a corporation that has elected pass-through status. Owners draw a reasonable salary subject to payroll taxes; remaining profit flows through as distributions not subject to self-employment tax.
  4. C-corporation. The LLC is treated as a standard corporation. The LLC itself owes federal income tax on profit; owners owe additional tax on dividends received.

The default depends on how many members the LLC has. The election departs from the default by filing a specific IRS form by a specific deadline.

Default 1: the single-member disregarded entity

If your LLC has exactly one owner and you have not filed any election form, the IRS treats it as a disregarded entity. "Disregarded" is the literal regulatory term — the LLC is disregarded as separate from its owner for federal income tax purposes.

Practically, this means:

The disregarded-entity treatment is the right answer for most solo founders with annual profit under roughly $60,000. The compliance burden is minimal — Schedule C plus Schedule SE on the personal return — and there is no separate entity-level return to prepare, file, or pay for.

One important non-tax wrinkle: a single-member LLC with at least one non-US owner of 25% or more must still file Form 5472 + a pro-forma Form 1120 every year, even though it is a disregarded entity for income-tax purposes. Form 5472 is an information return, not an income return, and its $25,000 minimum penalty for non-filing is one of the most expensive compliance traps in the federal tax code. See our Form 5472 guide for the full mechanics.

Default 2: the multi-member partnership

If your LLC has two or more members and you have not filed any election form, the IRS treats it as a partnership.

Partnership taxation has three moving parts:

  1. Form 1065. The LLC files an informational return showing its total income, deductions, and credits. The LLC itself does not owe federal income tax.
  2. Schedule K-1. The LLC issues one K-1 to each member showing that member's distributive share of every line item from the 1065.
  3. Personal returns. Each member reports their K-1 figures on Form 1040 (Schedule E Part II) and pays tax at personal rates.

Members who actively participate in the business are generally subject to self-employment tax on their distributive share of ordinary business income. Members who qualify as limited partners under §1402(a)(13) may exclude their distributive share from SE tax, though the IRS has been increasingly aggressive about contesting limited-partner status for LLC members who perform substantial services.

Partnership taxation has flexibility that no other classification has: allocations of income, loss, and credits do not have to follow ownership percentages, as long as the allocations have "substantial economic effect" under §704(b). Partners can also receive guaranteed payments for services (treated like wages but reported on Schedule K-1) and special allocations of specific items. This makes the partnership classification powerful for businesses with multiple investor classes, sweat-equity partners, or staged capital contributions.

The compliance burden is higher than disregarded-entity treatment: Form 1065 must be filed by March 15 (one month before personal returns are due), partner basis must be tracked annually, and the K-1 preparation requires a CPA for any non-trivial business. Typical CPA cost for a multi-member LLC 1065 + K-1 prep is $1,500–$4,000/year depending on complexity.

Election 1: S-corporation status

The S-corp election is the most common departure from the default rules. It is filed on Form 2553, signed by every owner, and effective for the tax year specified on the form.

S-corp taxation differs from default treatment in two specific ways:

The self-employment tax savings are the entire point of the election. Suppose a single-member LLC nets $150,000 of profit. As a disregarded entity, the owner pays self-employment tax of roughly $20,500 (after the deduction for half of SE tax). As an S-corp with a $70,000 reasonable salary, the owner pays payroll tax on the $70,000 (roughly $10,700) and no SE tax on the remaining $80,000 of distributions — saving roughly $12,000 of payroll-related tax per year. The savings widen as profit grows.

The election has costs that erode the savings. Payroll administration adds $40–$100/month (ADP, Gusto, OnPay, or QuickBooks Payroll). The 1120-S return adds $800–$2,500/year to CPA cost. Owner-employees must file Form W-2 wages on their personal return rather than the cleaner Schedule C. And the IRS has been increasingly aggressive about challenging unreasonably low salaries — Rev. Rul. 74-44 and a long line of cases establish that the salary must reflect what a comparable employee would earn for the same work in the same industry.

The rule of thumb: the S-corp election starts paying for itself around $40,000–$60,000 of profit above a reasonable salary. Below that range, the compliance overhead exceeds the SE-tax savings. We have a longer breakdown in the LLC vs S-corp guide, including the reasonable-salary math and a state-by-state look at where the election makes the most sense.

The Form 2553 deadline (and the most common mistake)

Form 2553 must be filed by the 15th day of the third month of the tax year the election is to take effect. For a calendar-year LLC that wants the election effective January 1, 2026, the deadline is March 15, 2026. Late-election relief is available under Rev. Proc. 2013-30 if you can show reasonable cause for the late filing — most CPAs can secure relief if you file within three years and three months of the intended effective date, but you should not rely on this as a default.

The most common mistake is forming the LLC in November, intending to operate as an S-corp from January 1, and then forgetting to file Form 2553 until April. Even with relief, the missed deadline costs a CPA fee and creates audit exposure that a timely filing avoids.

Election 2: C-corporation status

The C-corp election is rare for LLCs. It is filed on Form 8832 and converts the LLC to a standard corporate taxation regime: the entity owes federal income tax at the 21% flat rate, and owners owe additional tax on dividends received.

The double taxation has been the C-corp's defining feature since 1913. The same dollar of profit is taxed twice — once at the entity level at 21%, then again at the shareholder level when distributed as a dividend (qualified-dividend rates of 0%/15%/20% depending on bracket). A 100% qualified-dividend distribution of after-tax profit results in an effective combined federal tax rate of roughly 36.8% on the original dollar of profit.

The election makes sense in a small number of specific situations:

For most solo founders and small businesses, the C-corp election is the wrong answer. The double taxation is real, the QSBS benefits require a multi-year holding period, and the compliance overhead is substantial.

How to actually make an election

The two forms have different mechanics:

Form 2553 (S-corp election)

Form 8832 (entity classification election)

A single-member LLC that wants S-corp treatment files Form 2553 alone — the IRS treats the 2553 filing as both the entity-classification election (from disregarded entity to association taxable as a corporation) and the S-corp election. A multi-member LLC doing the same thing files Form 2553 alone for the same reason.

How states treat LLC tax classification

State tax classification mostly follows federal, but several states diverge in ways that matter:

State franchise tax is separate from state income tax. Many states impose a flat or graduated franchise tax on every LLC regardless of profit or classification — Delaware ($300 flat), Wyoming ($60 minimum), Arkansas ($150 minimum), Connecticut ($250 flat — repealed for tax years starting on or after 2024, verify current status), Alabama ($100 minimum), and others. Federal tax classification does not change what the state charges for the privilege of existing as an LLC in that state.

The five most common LLC tax-classification mistakes

  1. Forming an LLC and never thinking about federal classification at all. The default is fine for many businesses but is rarely the optimal choice once profit exceeds $60K–$80K.
  2. Filing Form 2553 late. The 75-day deadline is short. Late-election relief is available but creates audit exposure.
  3. Paying yourself an unreasonably low S-corp salary. The IRS has been winning these cases consistently. A reasonable salary is roughly 30%–50% of profit for most service businesses, higher for owner-operators in skilled trades.
  4. Forgetting that a multi-member LLC needs a partnership return (Form 1065) by March 15. One month earlier than personal returns. Late penalties accrue at $245 per partner per month.
  5. Switching classifications without understanding the 60-month rule. Once you elect a non-default classification, you cannot change again for five years without IRS consent.

When to consult a CPA

The classification decision is one of the few LLC topics where professional advice is usually worth the cost. The factors that argue for a CPA consult:

A one-time consultation runs $300–$700 with a CPA who specializes in small-business taxation. The cost is recovered within the first year of correct classification for any LLC that the consultation pushes toward an S-corp election with $60K+ of profit above a reasonable salary.

Bottom line

Every LLC is taxed federally as a disregarded entity, partnership, S-corp, or C-corp. The first two are defaults; the other two require Form 2553 or Form 8832 by a deadline most founders miss. Below $60K of solo profit, staying default is usually the right call. Once profit clears $80K, the S-corp election starts to pay for the payroll and compliance overhead. Multi-member LLCs need a CPA before the first Form 1065 is due. C-corp treatment is the right answer for a small number of cases, mostly involving outside investors.

Frequently asked questions

How is a single-member LLC taxed by default?

As a disregarded entity. The IRS treats the LLC as if it doesn't exist for income tax purposes — all business income, expenses, and net profit flow onto Schedule C of the owner's personal Form 1040. Net profit is also subject to self-employment tax (15.3% on the first $176,100 of 2026 SE earnings, then 2.9% Medicare plus a 0.9% Additional Medicare surcharge above $200,000 single / $250,000 joint). The LLC itself does not file a federal income tax return. The owner pays quarterly estimated taxes throughout the year.

How is a multi-member LLC taxed by default?

As a partnership. The LLC files Form 1065 informational return and issues Schedule K-1 to each member showing their distributive share of income, deductions, and credits. Members report their K-1 figures on their personal Form 1040. The LLC itself owes no federal income tax — the partnership is a pass-through. Members owe self-employment tax on their distributive share of ordinary business income unless they qualify as limited partners under §1402(a)(13).

When does an S-corp election save money?

When the LLC has net profit comfortably above the IRS reasonable-salary requirement for the owner's role — typically $40,000–$60,000 of distributable profit above a reasonable-salary baseline. The election converts a portion of profit from self-employment income (subject to 15.3% SE tax) to distributions (not subject to SE tax). Below that profit threshold, the SE-tax savings don't cover payroll, tax prep, and compliance overhead. See our full breakdown in the LLC vs S-corp guide.

How do I elect S-corp or C-corp tax treatment for my LLC?

Form 2553 elects S-corp. Form 8832 elects C-corp (or back to default). Form 2553 must be filed within 75 days of the start of the tax year you want the election to take effect (or any time during the prior year). Form 8832 can be filed for a future effective date up to 12 months ahead or a retroactive date up to 75 days back. Late-election relief is available under Rev. Proc. 2013-30 if you can show reasonable cause. File via mail or fax — neither form has an online filing option.

Do all states follow the federal tax classification?

Most do, but several diverge. California imposes its $800 minimum franchise tax on every LLC regardless of federal classification, plus an additional gross-receipts fee above $250,000. Texas treats LLCs as taxable entities for the margin tax above the no-tax-due threshold ($2.47M of total revenue in 2026). New Hampshire and Tennessee tax LLC income at the entity level. Most other states pass through following the federal classification — but state tax rules change, so verify with your state revenue agency before assuming pass-through treatment.

Can I switch tax classifications later?

Yes, but with friction. You can switch from default to S-corp by filing Form 2553. You can switch from default to C-corp by filing Form 8832. Once you elect a non-default classification, you cannot change again for 60 months without IRS consent, except in limited circumstances. Revoking an S-corp election is possible but requires shareholder consent and the same 60-month wait before re-electing. Plan the initial classification carefully — switching costs time and compliance overhead.

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