Agency Duties & Limited Dual Agency in WA: What RCW 18.86 Requires

RCW 18.86 is the agency-duty statute — and it got an update

Agency in Washington is statutory, not just custom. RCW 18.86 spells out the duties every licensee owes, and it was updated in 2024 by SB 5191. Whether you are representing a buyer, a seller, or both, the statute is the floor — your duties do not depend on a handshake or on which side pays the commission. They attach the moment you start acting on someone's behalf.

Every licensee owes a baseline set of duties to all parties: reasonable skill and care, honesty and good faith, disclosure of material facts you know that the other party could not reasonably discover, accounting for money and property, and a duty to provide the agency-relationship pamphlet. Layered on top of that baseline, the party you actually represent is owed the heightened duties most agents think of as fiduciary: loyalty, putting that client's interests first, full disclosure of conflicts, confidentiality of negotiating position, and acting on lawful instructions.

The distinction that trips people up is this: you can owe honesty and material-fact disclosure to someone you do not represent, while still owing undivided loyalty to your own client. Knowing exactly where that line sits — and being able to say so out loud at intake — is what keeps you out of a complaint to the Department of Licensing.

Buyer-agency agreements before showing — a process change, not just a form

Since the August 2024 NAR settlement took effect, a written buyer-agency agreement is required before you tour a buyer through a home. Treat this as a workflow change, not a piece of paper you backfill later. The signature has to happen before the showing, which means your intake conversation now front-loads the representation discussion that used to happen somewhere around the offer.

Practically, that reshapes the first call. Before you unlock a door, the buyer needs to understand who you represent, what your compensation is and who pays it, and that buyer-side compensation is now a negotiable term rather than something automatically covered by the seller. None of that is hard, but it has to be deliberate and documented. The agents who handle this smoothly built it into a repeatable intake script instead of improvising it per buyer.

This is exactly the kind of step that is easy to remember on a quiet Tuesday and easy to skip when a buyer wants to see a listing in twenty minutes. Build the checkpoint into your process so it fires every time, regardless of how rushed the showing request is.

Limited dual agency — written consent of both parties under RCW 18.86.060

Washington permits limited dual agency, but only with the written consent of both parties. RCW 18.86.060 governs it: when one firm — or one licensee — ends up representing both the buyer and the seller in the same transaction, you cannot proceed on assumed consent. Both sides have to agree in writing, and that agreement has to be informed, meaning each party understands what they are giving up before they sign.

What dual agency changes is the loyalty and confidentiality piece. As a dual agent you can no longer advocate one client's price or terms against the other, and you cannot disclose one party's negotiating position or confidential information to the other. The baseline duties — honesty, reasonable care, material-fact disclosure, accounting — still apply in full to both. Spell that limitation out in plain language at the moment consent is captured, not buried in a stack of closing documents the client skims.

Document it specifically: who consented, to what, and when, captured before you act in the dual-agency capacity. The same logic applies when two different licensees in the same firm represent opposite sides — depending on how your firm structures supervision, that can still trigger the firm-level dual-agency rules. When the stakes or the structure are unusual, that is a question for your designated broker or a WA-licensed attorney before you proceed, not after.

The designated-broker supervision link — why the firm is accountable

Agency duties do not stop at the individual licensee. Under RCW 18.85 and WAC 308-124, the firm's designated broker is responsible for supervising the licensees in the office, which means a representation or disclosure failure is rarely just one agent's problem — it reaches the broker who is charged with oversight.

That is why your brokerage cares how you handle agency consent and dual-agency disclosure: the designated broker carries supervisory accountability for the firm's transactions. It is also why 'I forgot to get consent in writing' is not a minor paperwork miss — it is a compliance gap that can implicate the whole firm. When you are unsure whether a situation has tipped into dual agency, the supervision structure is precisely why you loop in your broker early rather than deciding alone.

A disclosure-and-consent checklist to run at intake

Build a short, repeatable intake routine so the agency mechanics happen the same way every time. First, deliver the agency-relationship pamphlet and confirm the client understands who you represent. Second, get the written buyer-agency agreement signed before any showing, with compensation terms spelled out and the fact that buyer-side compensation is negotiable made explicit.

Third, identify dual-agency risk early: are you or anyone in your firm already representing the other side of this deal? If yes, capture informed written consent from both parties under RCW 18.86.060 before you act in that capacity, and state the loyalty and confidentiality limits in plain terms. Fourth, log the material facts you are obligated to disclose and keep that record with the file. Fifth, when the situation is genuinely ambiguous or high-stakes, escalate to your designated broker before proceeding.

This is where keeping a clean, timestamped record pays off. SENTINEL can log intake notes and retrieve supported RCW or NWMLS form references with their source context. The goal is fewer dropped steps and a reviewable trail, not a substitute for the current form, executed agreement, or your broker's judgment.