Download our Washington independent contractor agreement so you can explain the services a contractor will perform a for a client. Each contract must be evaluated separately.Outline your terms with an Independent Contractor Agreement. Print and download your customized contract for free. How to fill out the Independent Contractor Guide for Washington State? 1. Read through the entire contractor guidelines carefully before filling out any forms. If you're a Washington business that needs to hire employees, use a Washington employment contract template to outline terms of employment. Work is complete; Who owns the rights to the work; Whether the client's information must be kept confidential. Contract, documents, computer. Next, provide the project description and contract sum.