Private Investigator License Requirements in Washington

Yes — to operate a private investigator business in Washington, you need a Washington Private Investigator License (Individual / Agency) from Washington State Department of Licensing (DOL) - Private Investigator Program. The license costs approximately ~$110 individual license; ~$550 agency license + fingerprint fees and renews every 1 year. Key requirements include: Be at least 18 years old (21 for armed endorsement) and Pass the Washington DOL private investigator examination.

Washington Private Investigator License at a Glance

• License: Washington Private Investigator License (Individual / Agency)
• Regulator: Washington State Department of Licensing (DOL) - Private Investigator Program
• Estimated fee: ~$110 individual license; ~$550 agency license + fingerprint fees
• Renewal period: 1 year
• Processing time: 2-6 weeks
• Last verified: 2026-07-17

Key Requirements

• Be at least 18 years old (21 for armed endorsement)
• Pass the Washington DOL private investigator examination
• Pass fingerprint-based background check
• Agency principals must document 3 years of investigative experience
• Agencies must carry a $10,000 surety bond or equivalent insurance
• Work for a licensed agency if holding an individual license

How to Apply for a Private Investigator License in Washington

1. Pass the Washington DOL private investigator examination
2. Complete fingerprinting and the background check
3. Apply for the individual license under a licensed agency (or qualify as agency principal with 3 years of experience)
4. For agencies, post the $10,000 bond or equivalent insurance
5. Renew your license annually

Frequently Asked Questions

Do I need a license to run a private investigator business in Washington?

Yes. Private Investigator businesses in Washington need a Washington Private Investigator License (Individual / Agency) issued by Washington State Department of Licensing (DOL) - Private Investigator Program before operating. Operating without it can result in fines, business closure, and legal liability.

How do I get a private investigator license in Washington?

To obtain a private investigator license in Washington, you must: Be at least 18 years old (21 for armed endorsement), Pass the Washington DOL private investigator examination, Pass fingerprint-based background check. The license is issued by Washington State Department of Licensing (DOL) - Private Investigator Program and typically costs ~$110 individual license; ~$550 agency license + fingerprint fees.

How much does a private investigator license cost in Washington?

A private investigator license in Washington costs approximately ~$110 individual license; ~$550 agency license + fingerprint fees. This fee covers the initial application. Renewal occurs every 1 year.

How long does it take to get a private investigator license in Washington?

Processing time for a Washington private investigator license is typically 2-6 weeks. Processing times may vary based on application completeness and background check requirements.

Who regulates private investigator businesses in Washington?

Private Investigator businesses in Washington are regulated by Washington State Department of Licensing (DOL) - Private Investigator Program. They oversee licensing, compliance, and enforcement for this industry.