How to Start a Specialty Contractor Business in Washington: 63 L&I Specialties, $15,000 Bond and What Each Can Do

A specialty contractor in Washington does one defined kind of work, such as painting, pressure washing, or another registered trade, and state law holds you to that scope. Before you bid your first job, you need an L&I contractor registration backed by a $15,000 bond and liability insurance, plus the right business entity, name, and state business license. This guide covers the steps in the order most new owners complete them, with the fees and timelines we can verify.

This article is informational content, not legal or tax advice. Contractor scope, bonding and insurance requirements, and tax treatment depend on your specific work. Confirm details with the named agency, and consult a qualified attorney or CPA for complex situations.

What You Need Before You Start

Gather these items before you begin. Most of them are needed at more than one step.

• A specialty that matches the work you will actually perform, selected from the 63 L&I specialties
• A business name and a decision on structure: sole proprietorship, general partnership, LLC, or corporation
• A registered agent with a physical street address in Washington (PO boxes and private mailbox addresses are not accepted)
• A $15,000 contractor bond from a surety
• Liability insurance with a $250,000 combined single limit
• Funds for the $150.20 L&I registration fee, which covers two years
• Funds for the $180 formation filing if you form an LLC or corporation, plus the $50 Business License Application processing fee
• Access to the Corporations and Charities Filing System (CCFS) and the Department of Revenue Business Licensing Service (BLS) online portal

Step 1: Pick Your Specialty Under WAC 296-200A-016

L&I registers 63 specialties under WAC 296-200A-016, and each carries its own scope. A specialty contractor may work only within its specialty and may subcontract only incidental work (RCW 18.27.010). A painting firm that also wants to take on carpentry or roofing is not operating within one specialty, so build your registration around the work you will actually bid.

Several common service categories need no L&I registration, and some have specific rules. The table below summarizes what L&I has confirmed.

Work	Registration status
Painting and wall covering	Registered specialty. Includes prep washing.
Pressure washing	Its own specialty, defined as cleaning and preparing surfaces for a protective, decorative or functional treatment. For stand-alone cleaning jobs, ask L&I Contractor Registration which category applies.
Janitorial final cleaning	Exempt
Murals and commissioned art	No registration needed
Window washing	No registration needed
Pruning	No registration needed
Lawn care	No registration needed
Gutter cleaning	No registration needed

For the full list of the 63 specialties and their scope language, read WAC 296-200A-016. Confirm any borderline job with L&I before you advertise it. Stand-alone cleaning work is the category to check first.

Step 2: Choose a Business Structure

Your structure decides whether you file with the Secretary of State at all. Sole proprietors and general partnerships do not file with the Secretary of State. An LLC or corporation does, and that filing is the first step for those entities.

• LLC: File a Certificate of Formation with Initial Report through CCFS. The filing fee is $180.
• Corporation: File Articles of Incorporation with Initial Report. The filing fee is $180.

Both entities owe a $70 annual report, due by the last day of the month in which the entity was originally formed or registered. You may file up to 180 days early. A late filing carries a delinquency fee, for a total of $95. Washington has no franchise tax and no corporate income tax, but nearly every business pays the state business and occupation (B&O) tax, covered in Step 6.

LLC names must include Limited Liability Company, Limited Liability Co., L.L.C., or LLC under RCW 23.95.305. The name must be distinguishable from every other business name on record with the Secretary of State. It may not contain bank, banking, banker, trust, cooperative, any combination of industrial and loan, or any combination of two or more of building, savings, loan, home, association and society. Search existing names on the Secretary of State business search before you commit.

Every business must designate a registered agent in Washington under RCW 23.95.415. The agent must consent to serve, supply an email address, and have a physical Washington street address. You can serve as your own agent, or you can use a commercial agent registered with the Secretary of State. There is no fee to change the registered agent or registered office. If you need time to finish paperwork, you can reserve a name for 180 days for $30. Expedited service costs $100 per business entity and is generally processed within three business days. It is available online at checkout or by mail with the envelope marked EXPEDITE. The Secretary of State does not publish a standard turnaround for online filings.

Step 3: Register a Trade Name If You Use One

If you operate under any name other than your full legal name, you need a trade name registration. Washington registers trade names through the Department of Revenue's Business Licensing Service, not the Secretary of State and not your county. The fee is $5 for each trade name, plus the non-refundable BLS processing fee: $50 to open or reopen a business, or $10 when the filing is for another purpose, such as adding a trade name to an existing business. Start at the Department of Revenue trade name page.

Step 4: Get Your Statewide Business License (UBI)

Washington runs one statewide Business License Application through the BLS. It issues the 9-digit Unified Business Identifier (UBI) and handles city, county and state endorsements in the same application. You need this license if any of the following apply:

• You need city, county or state endorsements
• You operate under a name other than your full legal name
• You plan to hire employees within 90 days
• You sell anything subject to sales tax
• You have gross income of $12,000 per year or more
• You owe any tax or fee to the Department of Revenue
• You buy or process specialty wood products
• You meet nexus thresholds

Most contractors will meet at least one of these tests, so plan on applying. If you are an LLC, LLP, partnership or corporation, file with the Secretary of State first, then submit the BLS application. The processing fee is $50 to open a business, plus separate endorsement fees. Online applications take about 10 business days. Add 2 to 3 weeks when city or state endorsements need approval. Mailed applications can take up to six weeks. Apply at the Department of Revenue business license page.

Step 5: Register With L&I as a Specialty Contractor

This registration is what makes you a contractor in Washington. Each of the 63 specialties carries the same core requirements under RCW 18.27.040:

• A $15,000 bond
• $250,000 combined single limit liability insurance
• A $150.20 fee, covering two years

Handle the application through L&I Contractor Registration at lni.wa.gov. Before you submit, ask L&I to confirm the application steps, the bond form, the insurance certificate format, and any documents it needs from your entity. The legal name on your bond and insurance should match the name on your registration and your UBI.

If You Work on Pre-1978 Homes or Child-Occupied Facilities

Renovation work on pre-1978 homes and child-occupied facilities needs a separate certification. The Department of Commerce certifies renovation firms for this work, not L&I. The certification costs $25 (WAC 365-230-260) and runs for a 5-year term (WAC 365-230-360). Do not assume your L&I registration covers this work, and confirm with Commerce whether any other federal certification also applies to your job.

Step 6: Handle Local Licenses, B&O Tax and Employees

State registration is only part of the picture. Washington has no corporate income tax and no personal income tax on wages, so the B&O tax is the main tax to plan for. Work through these items:

• Cities and counties: Many jurisdictions require their own business license or endorsement. Washington has 39 counties and 281 incorporated places, so check the city and county where you will work. Use the BLS endorsement step where it applies.
• B&O tax: The state B&O tax is a gross receipts tax with more than 50 activity classifications and no deduction for labor, materials or other costs. About 54 cities add their own B&O tax, which the Department of Revenue does not administer. Confirm your classification with the Department of Revenue at dor.wa.gov.
• Sales tax: The state rate is 6.5%. Whether a particular service or material is taxable depends on the transaction, so confirm with the Department of Revenue.
• Health district permits: Check with your local health district whether your work requires a permit.
• Employees: If you plan to hire within 90 days, you need the BLS license. Confirm your workers' compensation and unemployment insurance obligations with L&I and the Employment Security Department before your first hire.

Common Mistakes to Avoid

• Registering the wrong specialty. Bidding work outside your specialty is the fastest way to create a problem with L&I. Subcontract only incidental work.
• Filing a trade name with the Secretary of State or your county. Trade names are registered through the BLS.
• Using a PO box as your registered agent. PO boxes and private mailbox addresses are not accepted.
• Missing the annual report. A late LLC or corporation annual report carries a total cost of $95, and the due date is the last day of the formation month every year.
• Starting the BLS application before the entity exists. LLCs and corporations must file with the Secretary of State first.
• Ignoring city endorsements. They can add weeks to your license timeline.
• Assuming a no-registration service has no rules. Window washing, pruning, lawn care and gutter cleaning need no L&I registration, but a city may still have its own requirements.

Expected Results and Timelines

A complete, matching set of filings often helps avoid rework and delay. Based on published timelines, you could expect the following. These are estimates, not guarantees.

• An expedited LLC or corporation filing is generally processed within three business days. Standard online filings have no published turnaround.
• An online BLS application takes about 10 business days, and may take 2 to 3 weeks longer when endorsements are needed. Mailed applications can take up to six weeks.
• L&I processing time depends on the bond and insurance documents you submit. Confirm the current timeline with L&I before you schedule your first job.

Where to Get Help

The Washington Small Business Development Center offers business advising across the state. The SBA Seattle district page lists Washington resources. For bonding and insurance questions, speak with a licensed surety agent or insurance broker. For entity structure and tax questions, consult an attorney or CPA.

This article is informational only and is not legal or tax advice. Verify all fees, deadlines and requirements with the agency that administers them before you file.