Services3 min read
Best LLC for consultants: S-corp math and professional liability
Consulting is advice, and advice can be wrong in ways that cost a client money. The entity keeps that away from your house; it does nothing to stop the claim, and for some professions it is not even the entity you are allowed to use.
The short answer
A single-member LLC, with the S-corp election modelled at roughly $90,000 of profit and professional indemnity cover from the first engagement. Check whether your profession is one your state restricts.
Published
Consulting has the cleanest structural answer of any service business and the most commonly misunderstood one, because people expect the LLC to do a job that insurance does.
The short answer
A single-member LLC, disregarded. Elect S-corp status when net profit is durably past roughly $90,000 — the worked arithmetic, including the reasonable-compensation constraint, is in the freelancer guide, and it applies unchanged here.
What the entity does and does not do
| Risk | Does the LLC help? |
|---|---|
| A client sues over advice that cost them money | It keeps the claim away from your personal assets. It does not prevent or pay the claim. |
| Your own negligence | Limited. A member can generally still be liable for their own wrongful acts — the entity is not a personal shield for what you did. |
| A subcontractor's error | Yes, meaningfully. This is one of the clearer cases for having an entity. |
| A client refusing to pay | No. That is a contract question. |
Some professions cannot use an ordinary LLC
If your work requires a state licence — accountancy, law, engineering, architecture, medicine, and others depending on the state — you may be required to use a professional limited liability company or professional corporation rather than a standard LLC, and ownership may be restricted to people holding the relevant licence.
"Consultant" covers both licensed and unlicensed work, so this is worth checking rather than assuming. The detail is in the licensed professional practice guide.
The contract is where consulting engagements fail
- Scope, in writing, with deliverables. Scope creep is the most common way a profitable engagement becomes an unprofitable one.
- Limitation of liability capped at fees paid. The single most valuable clause in a consulting agreement, and the one clients most often try to strike.
- Payment terms and a late-payment provision. Enforceable because agreed in advance, not because asserted afterwards.
- Who owns the deliverable, and what you retain the right to reuse. Your frameworks and templates are your business; the client's specific output is theirs.
- Non-solicitation and confidentiality, in both directions.
Classification cuts the other way here
A consultant working full-time hours for a single client, using their systems, under their direction, over a long period, starts to look like an employee. The exposure sits mainly with the client, which is why large organisations insist their consultants have an entity, insurance and other clients — and why a portfolio of clients is a structural improvement rather than just a commercial one.
If you are not a US person
- No S-corp election — Section 1361 bars non-resident alien shareholders, which removes the main tax lever on this page.
- Form 5472 with a pro-forma Form 1120 annually, $25,000 penalty for failure to file.
- Whether your income is effectively connected turns on where the work is performed. Advice delivered from abroad to a US client is a different position from advice delivered on site in the United States, and consultants travel. Track your days.
- Provide a W-8BEN to US clients so they do not withhold at the default rate.
When to revisit
| Trigger | What to reconsider |
|---|---|
| Net profit approaching $90,000 | Model the S-corp election. |
| First subcontractor | Insurance scope, and a contract that flows your obligations down. |
| One client above 70% of revenue | Classification and concentration risk. |
| Working on site in the US as a non-resident | Day counting, and the ECI analysis. |
| Productising the advice | It starts becoming a different business — see the course guide. |
Look like the business you are
Founders 8 forms the entity and holds the filings and deadlines, so client onboarding has something to verify.
Build your workspaceFounders 8 does not provide tax advice. Tax residency depends on facts and rules specific to each jurisdiction — review your position with a qualified adviser.