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WA · SERVICE-AGMT · Updated July 2026 · Free

Washington Service Agreement

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Washington at a glance: Default Interest: 12% per year (RCW § 19.52.010) · Governing Law: Washington Revised Code Title 19

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Overview

Service Agreements in Washington

Washington service agreements are governed by Title 19 of the Revised Code of Washington. Late fees must comply with the 12% statutory cap unless written (RCW § 19.52.010).
Key Facts

Washington Service Agreement — Quick Reference

RequirementWashington Rule
Default Interest12% per year (RCW § 19.52.010)
Governing LawWashington Revised Code Title 19
Legal Requirements

Washington Legal Requirements

  • Late fees exceeding 12% per year must be in writing to be enforceable.
Governing Laws

Washington Governing Laws

RCW § 19.52.010
Legal Rate of Interest
Defines contract default interest rates.

Read the full text of these laws at Cornell Law School's Washington legal resources or your state legislature's official website.

Questions & Answers

Washington Service Agreement — Frequently Asked Questions

What is the default contract interest rate in Washington?

The default rate is 12% per annum.