Which Business Entity Is Right for Your Startup?
Answer five questions to identify a starting point for your entity discussion. Compare the tax, ownership, and financing tradeoffs below.
This interactive tool is a decision gateway. For the full substantive explainer, see LLC vs. C-Corp for Startups.
Entity Types Side by Side
This table compares a C corporation, an LLC using its default federal tax treatment, an eligible entity electing S corporation taxation, and a sole proprietorship. An LLC can also elect corporate taxation. State-law entity, tax classification, and state of formation are separate choices.
| Factor | C corporation | LLC (default taxation) | S corporation taxation | Sole Proprietorship |
|---|---|---|---|---|
| What it is | A state-law corporation taxed under Subchapter C. Delaware is common for venture-backed companies; other states are available. | A state-law entity: usually disregarded with one owner, or partnership-taxed with multiple owners. | A federal tax election for an eligible corporation or LLC. It can be effective from the start or later, subject to filing rules. | An individual operating without a separate entity. |
| Personal liability protection | Generally yes; guarantees and personal misconduct can still create liability. | Generally yes; guarantees and personal misconduct can still create liability. | Depends on the underlying corporation or LLC. | No entity liability shield. |
| Income taxation | Corporate tax on taxable income. Dividends can create a second shareholder-level tax. Retaining profits does not itself defer corporate tax. | Owners generally report business income whether distributed or retained. Loss deductions are subject to limits. | Income generally passes through, even without distributions. Some entity-level taxes can apply. | Owner reports business income on the individual return. |
| Outside investment | Common for venture funds and preferred-stock financings. Individual investors may consider other structures. | Can accept investors. Many venture funds prefer or require conversion before investing. | Generally incompatible with conventional VC financing. An investment does not automatically terminate S status, but an ineligible shareholder or a second class of stock can; preferred economics often create that second class. A partnership or corporate investor generally cannot be a shareholder. | Cannot issue separate equity interests; adding an owner changes the structure. |
| Equity compensation / ISOs | ISOs for eligible employees if §422 is satisfied; NSOs, restricted stock, and RSUs also available. | No ISOs under default taxation. Partnership-taxed LLCs can use profits interests, capital interests, and other arrangements. | If the issuer is a corporation that has elected S status, ISOs may be available if §422 is satisfied and awards preserve S eligibility. An LLC taxed as an S corporation remains an LLC under state law and does not have corporate stock on which to grant ISOs; its equity tools differ from partnership-taxed LLC awards as well. | Cannot issue stock or LLC interests. |
| QSBS / Section 1202 | Potentially eligible for qualifying C-corporation stock; C status alone is insufficient. For stock acquired after July 4, 2025, the per-issuer dollar limitation generally begins at $15 million or uses the 10× adjusted-basis limitation, with the applicable statutory mechanics; older stock remains under the prior $10 million dollar-limit regime. See the dates, limits, and requirements below. | Interests in an LLC under default taxation are not QSBS. A later incorporation may create qualifying stock prospectively. | Its own stock is not QSBS while the issuer is an S corporation. | No qualifying stock. |
| Employment / self-employment taxes | Employee wages generally carry payroll taxes. Shareholder dividends are not self-employment income. | Self-employment tax may apply to an owner’s business earnings; treatment depends on classification, activity, and applicable exceptions. | Shareholder-employees generally must receive reasonable compensation subject to payroll taxes; qualifying S-corporation distributions generally are not subject to self-employment tax. | Net self-employment earnings generally carry self-employment tax, subject to applicable rules and exceptions. |
| Foreign owners | Generally permitted, subject to other applicable laws and tax reporting. | Generally permitted; withholding and reporting can add complexity. | Nonresident alien shareholders are generally ineligible. Foreign citizenship alone does not disqualify a U.S. tax resident. | No shareholders; an individual’s tax and other legal status must be considered. |
| Multiple jurisdictions | Registration, tax nexus, payroll, and international rules require review. | Same issues; pass-through ownership can add owner-level filings and withholding. | Same underlying entity issues; state recognition of S treatment varies. | Licensing, tax nexus, and cross-border rules still apply. |
| Ownership classes | Common and preferred stock can have different economic and voting rights. | Flexible economic and voting rights under the operating agreement, subject to tax rules. | One economic class. Differences in voting rights are permitted. | Not applicable. |
| Tax-deferred acquisition | Some transactions qualify under §368; transaction requirements must be satisfied. | Not directly a corporate §368 reorganization under default taxation; other contribution or restructuring rules may be relevant. | Some transactions qualify under §368; S status does not itself bar a reorganization. | No corporate stock; other contribution or restructuring rules may be relevant. |
| Administration | Corporate approvals, equity records, annual filings, and corporate tax returns; Delaware adds its own fees and taxes. | Operating agreement and state filings; a multi-owner LLC generally files Form 1065. | Election requirements, corporate tax return, shareholder eligibility, and payroll where applicable. | Fewer entity formalities, but business records, licenses, and tax filings remain necessary. |
| Often worth considering for | Venture-backed and other high-growth businesses; companies expecting institutional financing, conventional startup equity compensation, or potentially valuable QSBS eligibility. | Owner-operated businesses, flexible ownership, regular distributions, and many real estate businesses. | Eligible businesses where modeled employment-tax savings justify payroll and compliance costs. | One-person activities after weighing liability exposure and the cost of forming an entity. |
QSBS dates and limits
QSBS is conditional. Qualifying stock acquired after July 4, 2025 can receive a 50%, 75%, or 100% exclusion after 3, 4, or 5 years. The per-issuer eligible-gain limit generally uses the greater of $15 million or 10 times qualifying basis; prior exclusions and other rules matter. The $15 million amount is indexed after 2026. Earlier acquisitions use the older rules, including the $10 million dollar-limit regime and a holding period of more than five years.
C corporation status, original issuance, gross assets, business activity, and shareholder requirements need review. The holding period generally begins with acquisition of qualifying stock, not merely formation of the entity; vesting, §83(b), and tacking rules can affect timing. Incorporating an LLC later can start prospective qualification, but LLC ownership time generally does not count.
Sources: IRS LLC classifications · IRS S corporation eligibility · IRS reasonable compensation · Section 422 (ISOs) · Section 11 (corporate tax) · Section 1361 (S corporations) · Section 368 (reorganizations). Reviewed September 14, 2026.
Joe Wallin is a startup and technology attorney licensed in Washington State. Schedule a consultation →