Last updated: April 30, 2026

How to Start a Private Investigator Business in Washington State (2026)

The single most important thing every Washington private investigator needs to internalize before taking a client is that RCW 9.73.030 makes Washington a strict all-party consent recording state. Recording a private conversation, phone call, or electronic communication without the consent of every participant is a criminal offense – civil and criminal liability both attach, and any recording obtained in violation is inadmissible at trial under RCW 9.73. This is materially stricter than the federal one-party consent baseline and stricter than Texas, Florida, North Carolina, Michigan, and most of the country. PI work in Washington has to be designed around this rule from day one.

The licensing structure under Chapter 18.165 RCW separates two licenses: an individual Private Investigator license for working PIs (any qualifying adult with a clean background and a pre-assignment training credential) and a Private Investigator Agency license for the business entity that employs PIs (3 years of qualifying investigative experience OR exam, plus a $10,000 surety bond or $25,000 liability insurance). To carry a firearm on the job, you need a separate Firearms Certificate from the Washington State Criminal Justice Training Commission (WSCJTC) and an Armed PI endorsement on your DOL license. Workers’ comp must come from the L&I monopolistic state fund – private workers’ comp is illegal in Washington.

Washington PI Requirements at a Glance

Requirement	Agency	Cost / Standard	Notes
Individual PI License	WA DOL Private Investigative Agencies Program (RCW 18.165)	Application fee + fingerprint	18+, US citizen or resident alien, clean criminal record, employment by or offer from PI agency, 4-hour pre-assignment training
PI Agency License	WA DOL Private Investigative Agencies Program	Application fee	3 years (6,000 hours) qualifying investigative experience OR pass agency exam
$10,000 Surety Bond OR $25K/$25K GL Insurance	Surety company / Private carrier	$10K bond ~$100-$300/yr surety premium; or $25K/$25K GL (often part of $1M/$2M policy at $700-$2,000/yr)	Mandatory under RCW 18.165
Armed PI License + Firearms Certificate	WA DOL + WSCJTC	WSCJTC Firearms Certificate Program fees + DOL endorsement	Optional. Firearm must be owned by employer/agency
RCW 9.73.030 ALL-PARTY consent recording compliance	State law (criminal statute)	No fee; structural compliance	Felony to record private conversations without all parties’ consent
LLC Certificate of Formation	WA Secretary of State	$200 online + $70 annual report	Same-day online
UBI / Business License Application	DOR Business Licensing Service	$90 + city endorsements	~10 business days
Workers’ comp (monopolistic) – if employees	L&I state fund	Risk class 7605 typical	Private illegal in WA
PFML / WA Cares / UI / Min wage	ESD / WA Cares	1.13% PFML + 0.58% WA Cares + UI on $78,200 + $17.13 (state) or $21.30 (Seattle) min wage	From first employee

How to Start a Private Investigator Business in Washington (Step by Step)

Step 1: Get Your Individual Private Investigator License

Apply through the WA DOL Private Investigative Agencies Program. Eligibility under RCW 18.165.030:

• At least 18 years of age
• US citizen or resident alien
• Submit proof of identity
• Submit fingerprints (WSP + FBI background check)
• No criminal convictions that the Director determines directly relate to capacity to perform PI duties
• Proof of employment by or job offer from a Washington-licensed PI agency
• Pay the nonrefundable application fee
• Complete pre-assignment training – minimum 4 hours

The individual PI license is required for anyone performing investigative work for a fee in Washington. Agency owners typically hold individual PI licenses themselves; if you don’t, you can still operate an agency but cannot personally conduct investigations.

Step 2: Build Qualifying Experience or Pass the Agency Exam

To get the Agency license that lets you own and operate a PI business in Washington, RCW 18.165.050 requires EITHER:

1. Three years of qualifying investigative work experience – calculated as 2,000 compensated hours = 1 year, so 6,000 total hours. Qualifying experience includes:
   • Employment as a Washington-licensed PI
   • Law enforcement (city/county/state police, sheriff’s deputies)
   • Federal agent (FBI, DEA, HSI, USSS, ATF, USPIS, IRS-CI)
   • Military criminal investigator (Army CID, NCIS, OSI, CGIS)
   • Attorney’s investigator (employed by a law firm doing investigative work)
   • Insurance SIU (Special Investigations Unit)
2. OR pass the Washington PI Agency examination – written test administered by DOL covering relevant statutes, rules, ethics, and operational competencies

Step 3: Form Your LLC and Get Your UBI

File a Certificate of Formation with the Secretary of State CCFS portal: $200 online or $180 paper. $70 annual report. Get a free EIN. File the DOR Business License Application ($90) for your UBI.

Step 4: File the $10,000 Surety Bond or $25,000 Liability Insurance

RCW 18.165 requires every PI agency to file with the DOL Director either:

• A $10,000 surety bond – typical surety premium $100-$300/year if your credit is acceptable. Bond is in favor of the State of Washington and protects against agency misconduct.
• OR a Certificate of Insurance showing comprehensive general liability with at least $25,000 bodily/personal injury coverage AND $25,000 property damage coverage

Most operators choose the insurance route because the $25K minimums are well below the $1M/$2M general liability that commercial clients typically require anyway, so the policy serves double duty. A typical PI GL policy runs $700-$2,000/year.

Step 5: Apply for Your PI Agency License

Submit your agency license application to WA DOL Private Investigative Agencies. Required:

• Application form and fee
• Proof of qualifying experience or exam pass
• Surety bond or insurance certificate
• Background check + fingerprint
• Business entity documentation (LLC certificate, EIN, UBI)
• Agency name (cannot use “police,” “law enforcement,” or imply government affiliation)

Approval timeline typically 60-120 days. Once licensed, your agency can hire other licensed individual PIs to work under your agency license.

Step 6: Operate Within Washington’s All-Party Consent Recording Law (RCW 9.73.030)

This is the single most important compliance area for WA PIs. Washington’s RCW 9.73.030 makes it a criminal offense to intercept or record any private telephone call, in-person conversation, or electronic communication without the consent of all parties. This is materially stricter than the federal one-party consent baseline and dramatically stricter than states like Texas, Florida, NC, MI, GA, IL, OH, and most others.

What Counts as Consent

Per RCW 9.73.030, “consent shall be considered obtained” if one party tells all of the others, in a reasonably effective way, that the communication or conversation is going to be recorded. So a clear opening statement on a recorded call (“This call is being recorded for quality and training purposes”) followed by continued participation generally constitutes consent under the deemed-consent provision.

Limited Exceptions

• Communications conveying threats of extortion, blackmail, bodily harm, or other unlawful demands
• Anonymous, repeated, or extremely-inconvenient-hour calls
• Communications by a hostage holder or barricaded person
• Law enforcement officers acting under judicial authorization with one-party consent + probable cause of a felony

Civil PIs do NOT qualify for any of these exceptions in routine work. If a client wants you to record a meeting, phone call, or surveillance audio, you must either obtain consent from all parties or refuse the assignment.

Practical PI Compliance Approaches

• Video without audio – silent video surveillance of public spaces is not a “private communication” under RCW 9.73.030. Audio is the trigger.
• One-party consent in interstate calls – if your client is in Washington but the other party is in a one-party state, federal courts have generally held WA’s all-party rule still applies if the recorder is in WA. The conservative approach is to assume WA’s rule controls when in doubt.
• Subpoena and discovery – records, communications, and documents obtained through proper legal process bypass RCW 9.73.030 entirely.
• Non-private settings – public statements, business meetings recorded openly, or communications with no reasonable expectation of privacy fall outside RCW 9.73.030.

Step 7: Optional – Get an Armed Private Investigator License

To carry a firearm during PI work in Washington, you need both:

1. Firearms Certificate from the Washington State Criminal Justice Training Commission (WSCJTC) – issued through the WSCJTC Firearms Certificate Program for Private Security, Private Investigators, and Bail Bond Recovery Agents. Includes a training course and qualification with the firearm.
2. Armed Private Investigator License endorsement on your DOL license under RCW 18.165.040 and RCW 18.165.060.

Critical detail under RCW 18.165.060: all firearms carried while armed must be owned by the employer (the agency), not by the individual PI. If required by law, firearms must be registered with the proper government agency. Personal firearms cannot be used on duty.

Armed PI work is uncommon in routine civil investigations (surveillance, infidelity, asset searches, skip tracing). It’s more relevant for executive protection, security-adjacent investigations, and high-risk subject contact.

Step 8: Set Up Tax, Payroll Stack, and Insurance

PI services tax treatment: Washington PI services are taxed under Service & Other Activities B&O at 1.5% (gross under $1M), 1.75% ($1M-$5M), 2.1% ($5M+). NOT subject to retail sales tax – you don’t charge clients sales tax on investigative services. (Reimbursable expenses like out-of-pocket costs may have different treatment – track them separately.)

If you employ other PIs:

• L&I workers’ comp through the monopolistic state fund (private illegal). Risk class 7605 typical for security/PI services. Per-hour rates moderate.
• UI through ESD on $78,200 wage base (2026)
• PFML 1.13% (employer share 28.57% if 50+ employees)
• WA Cares 0.58% withheld from employee wages
• Minimum wage $17.13 statewide; $21.30 Seattle (no small/large split)
• Overtime 1.5x after 40 hours/week

Insurance: Carry $1M/$2M general liability (not just the $25K minimum), errors & omissions / professional liability for investigative work, commercial auto for any vehicles used in surveillance, and inland marine for surveillance/recording equipment.

Washington PI Market: Where the Work Is

• Family law / divorce / custody investigations: Largest segment statewide. Seattle, Bellevue, Tacoma, and Spokane family law firms regularly engage PIs for custody investigations, asset searches, and surveillance. Note that all-party consent recording law constrains how audio is obtained.
• Insurance defense / fraud investigations: Insurance carriers and TPAs across the state engage PI firms for surveillance of suspected workers’ comp fraud, disability claims, and bodily injury fraud. L&I monopolistic system means workers’ comp fraud surveillance is a steady niche.
• Corporate / due diligence: Seattle’s tech corridor (Amazon, Microsoft, F5, Tableau, Expedia) generates demand for executive protection, due diligence, M&A pre-acquisition investigations, and IP/trade secret theft cases.
• Legal investigations: Civil litigation discovery support, witness location, service of process (combined with separately-licensed Process Server work), criminal defense investigation. Closely tied to the Washington State Bar Association attorney population.
• Skip tracing and asset recovery: Reasonable steady demand statewide.
• Bail bond recovery: Limited – Washington has restricted commercial bail bond recovery practices since 2018.
• Background screening: Often handled by FCRA-regulated CRAs rather than PI firms, but PI agencies sometimes pivot here as supplementary revenue.

Cost to Start a PI Business in Washington

Item	Solo PI / Single-Member LLC	3-PI Agency
LLC + UBI + EIN	$290	$290
Individual PI License (per PI)	$200-$300 application + fingerprint	x 1-3 PIs
PI Agency License application	$200-$400	$200-$400
$10K Surety Bond OR $25K/$25K GL insurance	$100-$300 surety; or $700-$2,000 GL	Same
$1M/$2M comprehensive GL + E&O	$1,200-$3,000/year	$2,500-$6,000/year
L&I workers’ comp (per FTE)	$0 if owner-only	$1,500-$3,500/year per FTE
Surveillance equipment (cameras, GPS, comms, computer)	$3,000-$10,000	$10,000-$30,000
Database subscriptions (TLO, IRB, Tracers, LexisNexis)	$200-$800/month	$500-$2,500/month
Vehicle (if dedicated for surveillance)	$0-$15,000	$15,000-$60,000
Software (case management, billing)	$30-$100/month	$100-$400/month
Marketing / website	$500-$2,500 first year	$2,000-$8,000 first year
First-year out-of-pocket	~$8,000-$25,000	~$40,000-$120,000+

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Frequently Asked Questions

Do I need a license to be a private investigator in Washington?

Yes. Washington requires both an individual PI License for working investigators (18+, US citizen or resident alien, clean background, employed by or job offer from a WA PI agency, 4-hour pre-assignment training) AND a PI Agency License for the business that employs PIs (3 years/6,000 hours qualifying investigative experience OR pass the agency exam, plus a $10,000 surety bond OR $25K/$25K liability insurance). Both are administered by the Washington Department of Licensing under RCW 18.165.

What experience qualifies for a Washington PI agency license?

You need 3 years (6,000 hours) of qualifying investigative work experience, where 1 year = 2,000 compensated hours. Qualifying experience includes employment as a WA-licensed PI, law enforcement (city/county/state), federal agent (FBI/DEA/HSI), military criminal investigator (CID/NCIS/OSI/CGIS), attorney’s investigator, or insurance SIU. Alternative path: pass the Washington PI Agency examination administered by DOL. You must hold the individual PI license alongside.

Is Washington a one-party or all-party consent state for recording?

Washington is an ALL-PARTY consent state under RCW 9.73.030. Recording any private conversation, phone call, or electronic communication without the consent of every party is a criminal offense, and any recording made in violation is inadmissible at trial under RCW 9.73. This is dramatically stricter than the federal one-party consent baseline and stricter than Texas, Florida, North Carolina, Michigan, Georgia, Illinois, and most of the country. Limited exceptions exist (threats of extortion/blackmail, hostage situations, judicially-authorized law enforcement intercepts), but routine PI work doesn’t qualify. “Deemed consent” applies if one party announces in a reasonably effective way that the conversation is being recorded.

Do I need an armed PI license in Washington?

Only if you’ll carry a firearm during PI work. To get an Armed PI license you need both: (1) a Firearms Certificate from the Washington State Criminal Justice Training Commission (WSCJTC) through the WSCJTC Firearms Certificate Program for Private Security, Private Investigators, and Bail Bond Recovery, and (2) an Armed Private Investigator License endorsement on your DOL license under RCW 18.165.040 and .060. Critically, all firearms carried while armed must be owned by the employer/agency, not the individual PI. Personal firearms cannot be used on duty.

What is the bond requirement for a Washington PI agency?

Under RCW 18.165, you must file with DOL either a $10,000 surety bond (surety premium $100-$300/year typical) OR a certificate of insurance showing $25,000 bodily/personal injury + $25,000 property damage liability coverage. Most operators choose the insurance path because the $25K minimums are well below typical $1M/$2M GL coverage that commercial clients require, so the policy does double duty. PI GL policies typically run $700-$2,000/year.

Are PI services taxable in Washington?

PI services are taxed under Service & Other Activities B&O at 1.5% (under $1M), 1.75% ($1M-$5M), 2.1% ($5M+). NOT subject to retail sales tax – you don’t collect sales tax from clients on investigative services. Reimbursable expenses (mileage, third-party database fees, court filing fees) may have different treatment – track them separately and consult DOR or a CPA.

Is workers’ comp required for a Washington PI agency?

Yes if you have W-2 employees. Workers’ comp must come from the L&I monopolistic state fund – private workers’ comp is illegal in Washington. Risk class 7605 typical for security/PI services. Sole proprietors and single-member LLC owners with no employees are exempt but may opt in. Premiums are calculated per worker hour and adjust by experience modifier after about three years of claims history.