Key Takeaways
- Washington does NOT clearly extend charging-order-as-exclusive-remedy protection to single-member LLCs — RCW 25.15.256
- Washington does not legally require a written operating agreement, but you should have one anyway
- Washington applies its general alter-ego doctrine to LLCs via RCW 25.15.061, using the ordinary test — domination and control such that the entity has no separate identity, used to violate a duty or work a fraud or injustice. No Washington case specifically holding single-member LLCs to a heightened piercing standard has been confirmed for this guide, so treat piercing risk here as standard rather than elevated, while still following clean formalities given the ambiguity around the state's foreclosure language.
- Washington has no general personal income tax on wages. It does have a capital gains excise tax — 7% on long-term capital gains between roughly $250,001 and $1 million, 9.9% above $1 million, with the first $250,000 exempt annually — upheld by the Washington Supreme Court, which could apply if you ever sell your LLC interest or the underlying business assets, though it does not apply to ordinary pass-through operating income.
- Same-day single-member LLC formation and a solo-owner operating agreement available through LLC Attorney, at no markup on state fees
A single-member LLC is the most common way solo owners in Washington structure their business — but Washington's charging-order statute is genuinely ambiguous on how easily a creditor can force a foreclosure, a nuance most "no income tax state" marketing skips entirely.
This guide covers exactly how a Washington single-member LLC works in 2026 — the RCW 25.15.256 foreclosure question, whether you need a written operating agreement, alter-ego risk, and how the LLC is taxed, including Washington's B&O tax and capital gains excise tax.
What Is a Washington Single-Member LLC?
A single-member LLC (SMLLC) is a limited liability company with exactly one owner. It's formed the same way as any other Washington LLC — same Articles of Organization, same registered agent requirement — the only difference is ownership structure. By default, the IRS treats a single-member LLC as a "disregarded entity," meaning its income passes through to the owner's personal tax return rather than being taxed at the entity level.
Does Washington Protect Single-Member LLCs From Charging Orders?
A charging order limits a creditor of an LLC member (a personal creditor, not a business creditor) to collecting distributions from that member's interest — rather than letting the creditor seize LLC assets outright or force a sale. Many states extend this protection to multi-member LLCs without question, but treat single-member LLCs differently since there's no other member to protect from an unwanted co-owner.
Ambiguous, and worth flagging rather than assuming the best case. RCW 25.15.256(5) states the charging order is "the exclusive remedy" a judgment creditor has against a member's interest. But subsection (2) allows a court to order a foreclosure upon the transferable interest subject to the charging order "at any time" — without the explicit "reasonable time" evidentiary showing that gates foreclosure in Utah, Vermont, and Wisconsin's RULLCA-family statutes. Read literally, Washington's foreclosure trigger may be broader and more discretionary than even those weaker states, though no distinction is drawn in the statute between single- and multi-member LLCs specifically. Treat this as needing direct confirmation against the official RCW text before relying on it for a specific asset-protection plan.
Do I Need an Operating Agreement for My Washington SMLLC?
No. RCW 25.15.006(8) defines a limited liability company agreement as oral, implied, in a record, or any combination — no explicit "sole member" language appears in the core definition (a genuine contrast with Tennessee, Texas, Utah, Vermont, Virginia, and Wisconsin, all of which name sole members directly). A written operating agreement is still worth having as your clearest evidence the LLC is a genuinely separate entity.
A Washington operating agreement can name a successor member and include transfer-on-death language, letting your LLC interest pass to an heir without going through Washington probate — worth including even though Washington doesn't require the document itself.
Is a Washington Single-Member LLC Easier to Pierce?
Courts everywhere apply the corporate veil doctrine to LLCs, but with only one member, there's no second owner's independent conduct to point to as evidence the company is a genuinely separate entity — which is why single-member LLCs face more practical scrutiny than multi-member LLCs even where the legal test is identical on paper.
Washington applies its general alter-ego doctrine to LLCs via RCW 25.15.061, using the ordinary test — domination and control such that the entity has no separate identity, used to violate a duty or work a fraud or injustice. No Washington case specifically holding single-member LLCs to a heightened piercing standard has been confirmed for this guide, so treat piercing risk here as standard rather than elevated, while still following clean formalities given the ambiguity around the state's foreclosure language.
Formalities to maintain: keep a dedicated business bank account and never commingle personal and LLC funds, sign every contract and check in the LLC's name (not your own), maintain a written operating agreement even though it isn't required, keep basic records of major decisions and distributions, and adequately capitalize the LLC for the business it actually runs.
How Is a Washington Single-Member LLC Taxed?
By default, the IRS disregards a single-member LLC for federal tax purposes — you report business income on Schedule C of your personal return, and you'll owe self-employment tax (Social Security and Medicare) on net earnings. You can elect corporate taxation instead by filing Form 8832 (C-corp) or Form 2553 (S-corp) if that fits your situation better — but unlike a multi-member LLC, a single-member LLC can never elect partnership taxation, since that requires more than one owner.
Washington has no general personal income tax on wages. It does have a capital gains excise tax — 7% on long-term capital gains between roughly $250,001 and $1 million, 9.9% above $1 million, with the first $250,000 exempt annually — upheld by the Washington Supreme Court, which could apply if you ever sell your LLC interest or the underlying business assets, though it does not apply to ordinary pass-through operating income.
Washington LLCs owe a $70 annual report fee (rising to $95 if delinquent, including a $25 late penalty), due by the LLC's anniversary month. Washington also has a separate Business & Occupation (B&O) tax — a gross-receipts-based entity-level tax that applies regardless of profitability, distinct from the annual report fee.
Does My Washington SMLLC Need an EIN?
Technically, a single-member LLC with no employees can use the owner's SSN for federal tax filing purposes. In practice, get an EIN anyway (it's free and instant from the IRS) — nearly every Washington bank requires one to open a business account, and using an EIN instead of your SSN keeps your personal information off business paperwork and vendor forms.
The exact reading of RCW 25.15.256's foreclosure trigger — "at any time" versus a "reasonable time" evidentiary gate — needs one more verification pass against the official RCW text; this guide flags it as a real open question rather than a settled fact, and it should be confirmed before relying on Washington for asset-protection planning specifically.
How to Set Up Your Washington Single-Member LLC
If You Do It Yourself
Step 1 — File your Articles of Organization.
Form your LLC the same way any other Washington LLC is formed — the state doesn't use a different form or process for single-member LLCs.
Step 2 — Appoint a registered agent.
Washington calls this role a "Registered Agent" — you can serve as your own if you have a physical in-state address, or use a commercial service for privacy and reliability.
Step 3 — Draft an operating agreement built for a solo owner.
No. RCW 25.15.006(8) defines a limited liability company agreement as oral, implied, in a record, or any combination — no explicit "sole member" language appears in the core definition (a genuine contrast with Tennessee, Texas, Utah, Vermont, Virginia, and Wisconsin, all of which name sole members directly). A written operating agreement is still worth having as your clearest evidence the LLC is a genuinely separate entity. A Washington operating agreement can name a successor member and include transfer-on-death language, letting your LLC interest pass to an heir without going through Washington probate — worth including even though Washington doesn't require the document itself.
Step 4 — Understand your charging-order exposure.
Ambiguous, and worth flagging rather than assuming the best case. RCW 25.15.256(5) states the charging order is "the exclusive remedy" a judgment creditor has against a member's interest. But subsection (2) allows a court to order a foreclosure upon the transferable interest subject to the charging order "at any time" — without the explicit "reasonable time" evidentiary showing that gates foreclosure in Utah, Vermont, and Wisconsin's RULLCA-family statutes. Read literally, Washington's foreclosure trigger may be broader and more discretionary than even those weaker states, though no distinction is drawn in the statute between single- and multi-member LLCs specifically. Treat this as needing direct confirmation against the official RCW text before relying on it for a specific asset-protection plan.
Step 5 — Maintain formalities to avoid alter-ego risk.
keep a dedicated business bank account and never commingle personal and LLC funds, sign every contract and check in the LLC's name (not your own), maintain a written operating agreement even though it isn't required, keep basic records of major decisions and distributions, and adequately capitalize the LLC for the business it actually runs.
Step 6 — Get an EIN and open a business bank account.
Technically, a single-member LLC with no employees can use the owner's SSN for federal tax filing purposes. In practice, get an EIN anyway (it's free and instant from the IRS) — nearly every Washington bank requires one to open a business account, and using an EIN instead of your SSN keeps your personal information off business paperwork and vendor forms.
Step 7 — Handle ongoing state compliance.
Washington LLCs owe a $70 annual report fee (rising to $95 if delinquent, including a $25 late penalty), due by the LLC's anniversary month. Washington also has a separate Business & Occupation (B&O) tax — a gross-receipts-based entity-level tax that applies regardless of profitability, distinct from the annual report fee. Washington has no general personal income tax on wages. It does have a capital gains excise tax — 7% on long-term capital gains between roughly $250,001 and $1 million, 9.9% above $1 million, with the first $250,000 exempt annually — upheld by the Washington Supreme Court, which could apply if you ever sell your LLC interest or the underlying business assets, though it does not apply to ordinary pass-through operating income.
Step 8 — Watch for Washington-specific SMLLC traps.
The most common Washington-specific mistake is assuming the state's "no income tax" reputation translates into strong asset protection generally. Washington's charging-order foreclosure trigger reads more permissive than most other states' (no clear "reasonable time" evidentiary gate), it has no series LLC option, and its LLC Act contains no sole-member-specific statutory language at all — three separate gaps worth understanding rather than assuming away.
If LLC Attorney Does It for You
- Submit your business details at llcattorney.com — LLC name, registered agent, and ownership information.
- LLC Attorney forms your Washington single-member LLC and drafts a solo-owner operating agreement, including transfer-on-death provisions to keep your business out of probate.
- Receive your finished formation documents, EIN, and operating agreement, plus access to flat-fee attorney consultations (no retainer) for asset-protection questions as your business grows.
When Should You Talk to an Attorney About Your Washington Single-Member LLC?
Talk to an attorney before finalizing your Washington single-member LLC's structure if asset protection from personal creditors is a primary goal and you want the RCW 25.15.256 foreclosure language independently confirmed, if you're weighing the B&O tax and capital gains excise tax against forming in a neighboring no-income-tax state instead, or if you were hoping to use a series structure for multiple properties (Washington doesn't offer one).
Is Washington a State Where SMLLC Asset Protection Matters More?
Washington is worth extra scrutiny for a single-member LLC owner specifically because its charging-order statute doesn't clearly gate foreclosure behind the "reasonable time" showing found in most other states' RULLCA-family statutes — the "at any time" language in RCW 25.15.256(2) reads more permissive on its face. Combined with the total absence of series LLC availability or any sole-member-specific statutory language, Washington is one of the states in this guide where the details matter more than the state's general reputation for being business-friendly.
What You Actually Get With LLC Attorney's Washington SMLLC Formation
The part of forming a Washington single-member LLC that generic templates miss is the foreclosure ambiguity in RCW 25.15.256 — most formation services lean entirely on Washington's "no income tax" reputation without examining how the charging-order statute actually reads. LLC Attorney builds your operating agreement with that open question in mind.
- Single-member LLC formation in Washington, starting at $0 + state fees.
- Solo-owner operating agreement with transfer-on-death provisions, starting at $49.
- Charging-order, alter-ego, and tax considerations addressed for your specific state — not a generic multi-state template.
- Access to professionally trained Business Success Advisors at no charge, plus flat-fee attorney consultations (no retainer) for asset-protection questions.
Washington's single-member LLC rules require reading the charging-order statute carefully rather than assuming the best case — LLC Attorney makes sure your operating agreement and formation choices account for that ambiguity from day one.
Ready to Form Your Washington Single-Member LLC?
LLC Attorney forms single-member LLCs in Washington and drafts an operating agreement built for a solo owner, starting at $0 + state fees. See our full pricing for all service tiers.
Frequently Asked Questions
It's ambiguous. RCW 25.15.256(5) calls the charging order the exclusive remedy, but subsection (2) allows foreclosure "at any time" without a clear "reasonable time" showing requirement — a potentially broader foreclosure allowance than states like Utah or Wisconsin. No distinction is drawn between single- and multi-member LLCs in the statute, but the underlying foreclosure trigger itself reads less protective than it first appears.
No, Washington does not legally require a written operating agreement for a single-member LLC, and unlike several other states in this guide, Washington's statute doesn't even use explicit "sole member" language in its operating-agreement definition. A written one is still worth having as evidence of your LLC's legitimacy as a separate entity.
Washington applies its general alter-ego doctrine under RCW 25.15.061, with no confirmed case specifically holding single-member LLCs to a heightened standard. Clean formalities still matter given the ambiguity around the state's charging-order foreclosure language.
No. Washington's LLC Act has no statutory language written specifically for single-member LLCs — a genuine contrast with Tennessee, Texas, Utah, Vermont, Virginia, and Wisconsin, all of which name sole members directly.
No. Partnership taxation requires at least two members. A Washington single-member LLC can only be taxed as a disregarded entity (the default), or elect C-corp or S-corp taxation instead — Washington's lack of a general wage income tax means this election is mostly a federal-tax decision, aside from the state's separate B&O tax and capital gains excise tax.
Technically optional if the LLC has no employees (you can use your SSN instead), but get one anyway — it's free from the IRS, nearly every Washington bank requires it to open a business account, and it keeps your SSN off business paperwork.
Yes. Your operating agreement can name a successor member and include transfer-on-death language, letting your LLC interest pass to an heir outside of Washington's probate process — even though Washington doesn't require the operating agreement itself.
Given the ambiguity in Washington's foreclosure language applies regardless of member count, adding a nominal second member wouldn't clearly change your charging-order exposure the way it might in Utah, Vermont, or Wisconsin, where the weaker rule is explicitly limited to sole members. Talk to an attorney before adding a member for asset-protection reasons here — the underlying legal question needs independent confirmation first.
Yes. LLC Attorney forms single-member LLCs in Washington, including a solo-owner operating agreement, starting at $0 + state fees.