Use this Washington guide to identify the responsible licensing agency, put business setup tasks in a workable order, and reach the official state pages for registration, taxes, permits, and employer accounts. Sources were reviewed on .
Washington startup snapshot
- Contractor authority
- Department of Labor & Industries (L&I)
- Official state links tracked
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- Personalized roadmap
- Available free on this Washington page
Answer five questions. Get your Washington startup path.
This free first pass organizes the business, L&I registration, bond, insurance, trade-license, employee, and first-job steps that apply to what you select.
Washington contractor license requirements
Washington registers construction contractors through L&I. Unlike Oregon, there is no pre-license training or exam to register as a general or specialty contractor: you file the registration, post the bond, and carry insurance. Electrical and plumbing work are separate licensed trades with their own exams and bonds. Start with the Department of Labor & Industries (L&I). Confirm the exact credential for your trade, project size, and location before bidding.
Licensing, bond, and insurance details
| Requirement | Detail | Source |
|---|---|---|
| L&I contractor license | $150.20 registration fee for a two-year construction contractor registration (general or specialty), effective July 1, 2026. Confirm the current fee with L&I before filing. | L&I |
| Pre-license training & exam | No state exam or pre-license training is required to register as a general or specialty construction contractor. Electrical and plumbing are separately licensed and do require certification. | L&I |
| Surety bond | $30,000 surety bond for a general contractor, or $15,000 for a specialty contractor registered in a single specialty. These amounts took effect July 1, 2024 and apply at your next registration or renewal. Plumbing and electrical specialties post separate statutory bonds. | RCW source |
| General liability insurance | General liability insurance of at least $200,000 for injury or death to more than one person, $100,000 for injury or death to one person, and $50,000 for property damage, per RCW 18.27.050. | RCW source |
Taxes
Washington has no personal or corporate income tax but levies a Business & Occupation (B&O) tax on gross receipts and requires most contractors to collect and remit retail sales tax on construction services. Register through the Department of Revenue Business License Application.
Contractor licensing sources
These are the state pages used for the licensing summary and verified figures above. The weekly Contractor Lane source checker watches every URL for moves or outages:
How to start a contracting business in Washington
Use this order as a planning path. Open each official state link and confirm what applies to your entity, trade, project size, and job location.
Choose the business structure
Compare the entity options available in Washington before you file. Your structure affects registration, taxes, ownership records, and the documents a licensing agency may request.
Open the official Washington Department of Revenue open a business
Register the business
Use the official Washington filing system to form or register the entity and confirm whether a separate business name filing is needed.
Set up state tax accounts
Check the state revenue agency for business tax registration, sales or marketplace tax rules, withholding, and any industry-specific accounts that apply to your work.
Confirm the contractor credential
Start with Department of Labor & Industries. Match the license, registration, classification, or local requirement to the exact trade and scope you plan to sell.
Open the official Department of Labor & Industries contractor licensing
Check permits and local rules
State registration does not replace city, county, building-department, or trade-permit rules. Confirm the job address and scope before bidding or starting work.
Register before hiring
If you will have employees, confirm employer registration, withholding, unemployment, workers compensation, and workplace-safety responsibilities with the responsible agencies.
Open the official Washington Employment Security Department employer taxes
Official Washington business and contractor agencies
These government pages cover business formation, taxes, permits, employer setup, and contractor licensing. A source link is an entry point, not proof that every rule applies to every contractor.
- Washington Department of Revenue open a businessstartup guide, entity formation, business structure, business tax
- Washington business license applicationlicenses and permits, permit assistance
- Washington marketplace fairness guidancesales and marketplace tax
- Washington Employment Security Department employer taxesemployer resources, small business employer
- Washington contractor registrationlicenses and permits
What to verify before you bid
- Match the credential to the work. General building, residential work, electrical, plumbing, HVAC, roofing, public work, and specialty trades can follow different rules.
- Check the project location. A state registration never replaces city or county contractor registration, permits, bond requirements, or local business licensing.
- Set up the business first when required. Confirm the entity name, tax account, workers' compensation status, and insurance certificate match the name used on the license application and contracts.
- Confirm money and deadlines directly. Fees, financial limits, bonds, insurance minimums, renewal dates, notice rules, and lien deadlines are deliberately omitted unless they were checked against the responsible agency or statute.
Free Washington contractor resources
Browse Contractor Lane's complete 86-topic startup floor plus any additional trades identified by Washington official classifications. Open the Washington contractor resource library.
Common Washington contractor startup questions
Does Washington require a contractor license?
Washington registers construction contractors through L&I. Unlike Oregon, there is no pre-license training or exam to register as a general or specialty contractor: you file the registration, post the bond, and carry insurance. Electrical and plumbing work are separate licensed trades with their own exams and bonds.
Where do I start the contractor application?
Start with Department of Labor & Industries (L&I). Confirm the classification and application path for your exact work before relying on a general summary.
Can a city or county require something separate?
Yes. Local business licensing, contractor registration, trade permits, building permits, and bonding rules can apply even when the state does not issue a general-contractor license. Check the job location before bidding.
Is the free Washington roadmap available?
Yes. Use the free questionnaire on this page to create a first-pass Washington startup roadmap.
Getting the order right matters more than any single number. The free Washington builder above turns your answers into an ordered first pass, then keeps endorsement-specific decisions flagged for official confirmation.
Where Contractor Lane comes in
A list of requirements tells you what Washington asks for. The interactive roadmap puts those requirements in order for your trade and situation, then connects them to banking, payments, Google, pricing, and first-job setup.
General educational information for people starting a contracting business in Washington. Fees, amounts, and deadlines change. Contractor Lane is not a law firm or tax advisor.