Washington licenses private investigators through the Department of Licensing (DOL) under RCW 18.165 — with one defining quirk: you need the job first. You must already be employed by (or hold an offer from) a licensed agency before DOL will process your individual license. There's no experience requirement and no exam for the individual PI — just 4 hours of training.
Washington flips the usual order: you get hired by a licensed agency, then DOL licenses you.
Line up employment (or a written offer) from a licensed agency, then apply: 18+, a fingerprint background check, and 4 hours of pre-assignment training. No experience and no exam.
Run an agency by being its principal: meet one of three years (6,000 hours) of investigative experience OR pass the agency exam, maintain a physical Washington location, and file a $10,000 bond or qualifying liability insurance.
DOL sets these baseline criteria (RCW 18.165).
The individual license needs no experience — just a short training course. Experience only enters when you want your own agency.
For the individual PI license, you complete 4 hours of pre-assignment training from a licensed certified trainer — covering legal powers, evidence, report writing, courtroom testimony, and privacy/civil law. There is no experience requirement and no exam.
For your own agency, the principal must either document three years of investigative experience (counted as 2,000 compensated hours per year, so 6,000 total) or pass the DOL agency exam — an experience-or-exam choice — plus carry a bond or insurance.
The individual license is inexpensive; the agency tier adds higher fees plus a bond or insurance. Confirm current figures on the DOL fee page.
| Item | Typical | Notes |
|---|---|---|
| Individual PI — new | $220 | Renewal $193/year. |
| Fingerprints | ~$32 | Via IdentoGO; varies. |
| 4-hour training | varies | Through a licensed certified trainer. |
| Agency — new | $640 | Unarmed principal; renewal $385. |
| Agency bond OR insurance | $10,000 / $25k+$25k | Surety bond, or liability insurance ($25k bodily injury / $25k property). |
Figures from the DOL fee pages; fingerprint and training costs are third-party and variable. The agency picks a bond or insurance, not both. No continuing-education requirement is stated by DOL. Licenses renew annually.
Secure employment or a written offer — this must come before you apply.
Take pre-assignment training from a licensed certified trainer.
Get your application number, then complete the state/FBI background check.
Submit your DOL application and the $220 fee.
Build the 6,000 hours toward an agency license (or plan to take the agency exam).
Become the agency principal with experience-or-exam, a physical location, and a bond/insurance.
A license lets you work — it does not lift the privacy laws that bind every investigator. These are the lines that get people in trouble, license or not.
The federal Driver's Privacy Protection Act (DPPA) restricts motor-vehicle records, and recording laws govern when you can capture a conversation. Before you record anyone or pull personal data, read our recording-consent guide — it applies to a licensed investigator exactly as written.
In Washington, the entry path is structural: get hired, then get licensed.
Land the job first. Because DOL won't license you without agency employment, your first move is to get hired by a licensed agency — then the license and the 4-hour course follow.
Build toward the agency exam-or-experience. Either bank the 6,000 hours or prepare for the agency exam when you're ready to run your own shop.
Market reality. Pay varies widely by specialty and client base — consult the U.S. Bureau of Labor Statistics for current figures rather than any single number.
The rule we never bend: no state requires an LLC to be a private investigator — not Washington, not anywhere. An LLC is liability protection, not a licensing requirement.
You can work as an employee under someone else's licensed company without any entity of your own — the LLC question only arises if you operate independently or run your own firm.
When you do go independent, what some states require is a registered business behind the agency — and that can be an LLC, a corporation, or (sometimes) a sole proprietorship. The requirement is "a registered business," not "an LLC specifically." Choose an entity for liability protection, not because PI work demands it.
For the honest version of when forming one actually helps a solo operator, see our breakdown of when an LLC is worth it.
This guide is general information, not legal advice. Fees and rules change — confirm current requirements with the Department of Licensing, and consult a Washington attorney for advice specific to your situation. Smoothquill points you to the real authorities; it doesn't replace them.
Washington's job-first rule makes employment your starting line. Start with what the work actually looks like.
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