When business owners start comparing entity structures, the phrase 'double taxation' surfaces quickly, usually as a reason to avoid a C corporation. The reality is more layered than the label suggests, and the mechanics are worth understanding precisely because the stakes at tax time are real.
Under the 2025 Form 1120 instructions, unless exempt under section 501, every domestic corporation must file an income tax return whether or not it has taxable income and generally must file Form 1120 unless required or electing to file a special return. Form 1120 reports corporate tax items and figures the corporation's income tax liability. A corporation uses Form 1120 to figure its income tax liability. For an LLC classified as a C corporation, the LLC is taxed on taxable income, and distributions to members are includible in their gross income to the extent of earnings and profits; Publication 3402 describes this as double taxation.
LLCs work differently by default. The IRS states that a domestic LLC with at least two members is classified as a partnership for federal income tax purposes unless it files Form 8832 and affirmatively elects corporate status. Generally, a single-member LLC is disregarded as an entity separate from its owner and reports its income and deductions on its owner's federal income tax return unless it files Form 8832 and elects to be treated as a corporation. In the default cases, the LLC does not file Form 1120: a single-member LLC reports its income and deductions on its owner's return, while a partnership generally does not pay federal income tax on its income but passes profits or losses through to its partners. Instead, a multi-member LLC files Form 1065, which is an information return. As the 2025 Instructions for Form 1065 explain, a partnership generally does not pay tax on its income; it passes profits or losses through to its partners, who then report those items on their own returns. That is the core of pass-through taxation.
How Double Taxation Plays Out When an LLC Elects Corporate Status
Consider Marcus, who operates a consulting business through a two-member LLC. He and his co-owner have been filing Form 1065 each year and reporting their shares of income on their personal returns. A potential investor suggests restructuring to attract outside capital, and the owners consider electing C corporation status by filing Form 8832.
If the Form 8832 election takes effect, the domestic LLC is classified as an association taxable as a corporation and, for 2025 returns, generally files Form 1120 unless required or electing to file a special return. If classified as a C corporation, it is taxed on its taxable income. If the owners later distribute those after-tax profits to themselves, those distributions are includible in their gross income to the extent of the corporation's earnings and profits — the double-taxation dynamic described in Publication 3402. Under their prior partnership treatment, the partnership generally did not pay federal income tax on its income and instead passed profits or losses through to the partners, so the C-corporation distribution layer described in Publication 3402 did not apply. Electing C-corporation status changes the entity's federal income-tax treatment and can cause distributions to be included in members' gross income to the extent of the corporation's earnings and profits.
A domestic LLC with more than one owner is generally treated as a partnership for federal income-tax purposes unless it elects corporate status, so no Form 8832 classification election is required for the default treatment; the LLC generally must still file Form 1065. Electing away from that default, however, requires filing Form 8832. According to the IRS, an election specifying an LLC's classification generally cannot take effect more than 75 days before the date the election is filed, nor more than 12 months after it. Late election relief may be available in certain circumstances, but it is not guaranteed. When an LLC elects to be treated as an association taxable as a corporation and files Form 1120, it must also attach a copy of Form 8832 to that return for the year of the election.
A point worth noting about federal versus state rules: the IRS's classification framework — the rules under Regulations section 301.7701-3 that determine whether an LLC is a partnership, corporation, or disregarded entity — is strictly a federal income tax construct. Publication 3402 makes explicit that it covers only federal income, employment, and excise tax information and does not address state law governing LLC formation, operation, or termination, nor any state taxes. Publication 3402 does not address state law or state taxes, so owners should separately check applicable state requirements rather than assume the federal classification determines state treatment.
LLC Default Classification and the Form 8832 Election Mechanics
Suppose a three-member LLC is formed in a state that calls it an LLC under its own statutes. None of the members file any federal election forms. For federal income tax purposes, the entity is automatically classified as a partnership — it files Form 1065 as an information return and its members report their allocable shares of income, gain, loss, and deduction on their own returns. Generally, the partnership does not pay federal income tax on its income but passes profits or losses through to its partners.
Now suppose the members decide they want the entity taxed as a C corporation. They file Form 8832, Entity Classification Election, electing association-taxable-as-corporation status. For 2025 returns, the elected association generally files Form 1120 unless required or electing to file a special return. If classified as a C corporation, it is taxed on taxable income, and distributions are includible in members' gross income to the extent of earnings and profits. Under the IRS rule reflected on the page updated May 29, 2026, a classification election generally cannot take effect more than 75 days before filing or more than 12 months afterward, and late-election relief may be available in certain circumstances. For a 2025 Form 1120 election-year return, a copy of Form 8832 must be attached to Form 1120 or the applicable return.
So which structure tends to favor a given business from a tax standpoint? When owners are distributing most profits out of the business each year, pass-through treatment generally avoids the second layer of tax. For the distribution-level rule described in Publication 3402, retaining rather than distributing earnings can defer member inclusion until a later distribution, to the extent of earnings and profits. The supplied rules do not establish which structure produces the lower overall tax result.
Tax classification is only one dimension of this decision. Liability protection, governance requirements, ownership flexibility, and investor expectations all factor in, and those considerations vary by entity type and state. Getting the structure right at formation — and revisiting it when the business's economics shift — is the kind of planning where working with a tax advisor early tends to pay for itself many times over.