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Editorial 7 MIN READ

The single-member LLC, a decade in: what a solo founder actually buys

Ten years after the Delaware exemplar, the SMLLC is still the default, and the reasons have narrowed rather than expanded

The Editors
Staff, Incorporator.org
7 min read Updated
Contents 7 sections
  1. What the SMLLC actually is, for tax and for liability
  2. Where the shield has failed: Olmstead and its echo
  3. The 199A deduction and why the SMLLC still wins on tax
  4. The new federal filing: beneficial ownership under the CTA
  5. The 1099-K threshold keeps moving, and it matters for solo founders
  6. When the SMLLC is the wrong default
  7. Sources

single-member LLC (SMLLC) in 2024 is still the default vehicle for a solo founder, and the reasons are narrower than the marketing suggests. You get a federal tax treatment that is identical to a sole proprietorship, a liability shield that works in most states and has been punctured in one, and a new federal filing obligation that did not exist ten years ago.

The Delaware formation guide we wrote in April 2016 treated the SMLLC as a footnote to the C-corp conversation. A decade of operating experience has made the footnote worth its own article.

What the SMLLC actually is, for tax and for liability

The SMLLC is a creature of state law that the federal government has decided not to see. Under Treas. Reg. § 301.7701-3(b)(1)(ii), a domestic eligible entity with a single owner is disregarded as an entity separate from its owner unless it elects otherwise. The "check the box" rules have been in force since 1997, and the default has not moved. The owner reports business income on Schedule C of Form 1040, computes self-employment tax on Schedule SE, and pays it with the rest of the 1040 liability. An S-corp election (Form 2553) or C-corp election (Form 8832) is available if the founder has a reason; most do not in the first two years.

The liability shield is where state law does the work. File a certificate of formation, keep the entity capitalized, do not commingle, and in most jurisdictions the veil holds against ordinary contract and tort claims reaching the owner's personal assets. The case law on piercing is largely imported from corporate doctrine, with the wrinkle that charging-order protection (a creditor of a member can reach distributions but not the membership interest itself) is a native LLC concept.

Where the shield has failed: Olmstead and its echo

The single-member context is where the shield is weakest, because the charging-order logic assumes there is a non-debtor member to protect. In a one-member LLC there is no one else.

Florida took the point to its conclusion in Olmstead v. Federal Trade Commission, 44 So. 3d 76 (Fla. 2010). The FTC had obtained a judgment against Shaun Olmstead for deceptive marketing and moved to reach his interests in several single-member Florida LLCs. Olmstead argued the charging order was the creditor's exclusive remedy. The Florida Supreme Court disagreed. Because a single member holds all of the management and economic rights, the court reasoned, a creditor stepping into those rights does not impair any other member, and the policy basis for limiting the creditor to a charging order evaporates. The court ordered Olmstead to surrender his full membership interests. The Florida legislature later codified a rule that aligns with Olmstead: for a single-member LLC, the charging order is not the exclusive remedy.

Most states still treat the charging order as exclusive, and the Uniform Limited Liability Company Act says so in the states that adopted it. But Olmstead is the case every asset-protection attorney cites when a founder with real creditor exposure asks whether a one-member LLC is enough. The common workaround is a two-member structure with a spouse or family trust as the second member, which carries its own drafting risk around sham-member attacks.

The 199A deduction and why the SMLLC still wins on tax

The 2017 tax law (the Tax Cuts and Jobs Act) created Internal Revenue Code § 199A, a deduction of up to 20 percent of qualified business income for owners of pass-through entities. The SMLLC, as a disregarded entity, is squarely inside the population the section was written for.

For the 2024 tax year, the threshold amounts at which the 199A limitations begin to phase in are $191,950 for single filers and $383,900 for married filing jointly, per Rev. Proc. 2023-34, § 3.27. Below those thresholds, a qualifying solo founder gets the full 20 percent deduction on QBI with no wage or qualified-property tests to pass. Above the thresholds, the specified-service-trade-or-business (SSTB) limitation begins to bite, and consultants, lawyers, and financial advisers start losing the deduction as income rises. The deduction is scheduled to sunset after 2025 unless Congress extends it.

Under the threshold, the SMLLC keeps sole-proprietor simplicity, adds the state-law shield, and captures the 199A benefit without S-corp payroll mechanics. Above it, the calculus tips: an S-corp election can split income between a reasonable salary (FICA) and distributions (no self-employment tax), and the payroll overhead starts to pay for itself. The break-even is fact-specific but commonly sits north of $50,000 of net profit.

The new federal filing: beneficial ownership under the CTA

The Corporate Transparency Act, codified at 31 U.S.C. § 5336, is the single biggest change in the compliance life of an SMLLC since the check-the-box rules. As of January 1, 2024, most LLCs (including single-member LLCs) are "reporting companies" and must file a beneficial-ownership information (BOI) report with FinCEN identifying every individual who directly or indirectly owns or controls 25 percent or more of the company, plus any individual who exercises substantial control. For a solo founder the answer is one person: the founder.

FinCEN's implementing rule was published at 87 Fed. Reg. 59498 (Sept. 30, 2022). Entities formed before January 1, 2024 have until January 1, 2025 to file an initial report. Entities formed during 2024 have 90 days from formation. Entities formed in 2025 and after will have 30 days. The report is not an annual return; it is filed once and then updated within 30 days whenever the beneficial-ownership facts change (new address, name change, expired passport used as the identifying document). The filing itself is free.

There is active litigation over the CTA's constitutionality. In March 2024 a district court in Alabama held the statute exceeded Congress's enumerated powers in National Small Business United v. Yellen, but the injunction ran only to the plaintiffs in that case. For every other SMLLC, the filing obligation is live. A founder who formed an entity in 2019 and has not heard of the CTA should hear about it now. The penalty floor for willful non-compliance is steep, and FinCEN has been clear that the bar for "willful" is low when the filing is this simple.

The 1099-K threshold keeps moving, and it matters for solo founders

The reporting landscape for payment-platform income is still in transition. The American Rescue Plan Act of 2021 lowered the 1099-K threshold from the old $20,000-and-200-transaction rule to a flat $600, but the IRS has delayed implementation twice. For tax year 2024, Notice 2023-74 sets the threshold at $5,000 with no transaction minimum, as a "phase-in" toward the statutory $600 figure in a later year.

This is a bookkeeping issue, not a tax-liability issue. An SMLLC owner already owes tax on every dollar of business income regardless of whether a 1099-K arrives. What the threshold change affects is the volume of forms the IRS has on file, and therefore the probability of a mismatch notice. Reconcile the gross reported figure against the books before filing; the 1099-K reports gross receipts, not net, and does not account for refunds, fees, or chargebacks.

When the SMLLC is the wrong default

Three fact patterns push a founder off the SMLLC default.

The first is fundraising. Institutional investors do not invest in LLCs; they invest in C-corporations, usually Delaware ones, because the entire venture apparatus (preferred stock, option pools, qualified-small-business-stock treatment under IRC § 1202) assumes a corporate cap table. A founder who will raise priced equity inside eighteen months should form as a C-corp now and skip the conversion.

The second is Florida residency combined with creditor exposure. Olmstead means a Florida SMLLC is a weaker shield than founders assume, and a multi-member structure or an out-of-state formation with careful foreign-qualification planning is the usual workaround.

The third is a high-profit service business above the 199A thresholds where S-corp payroll mechanics pay for themselves. The election is available from day one, and the conversion later is not free.

For everyone else, and that is most solo founders, the SMLLC in 2024 remains what it has been for a decade: a cheap, clean container for one person's business, with one more federal filing than it used to have and one more deduction to claim while it lasts.

Sources

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