Washington Computer, Software, and SaaS Tax Guide

Prepared by Sales Tax Helper

Table of Contents

1. Introduction
2. Nexus Considerations
3. General Rules and Compliance Considerations
4. Specific Exemptions
5. Sourcing Rules
6. Audit Considerations
7. Voluntary Disclosure Agreements (VDAs)
8. Conclusion
9. References & Resources

1. Introduction

For software companies, SaaS providers, and technology firms conducting business in
Washington, the state's sales and use tax rules present unique challenges. Unlike some states that exempt electronically delivered software or cloud-based services, Washington generally taxes prewritten software regardless of delivery method and has specific provisions for digital products and remote access software. Washington's tax treatment of software and technology-related services depends on multiple factors, including whether software is prewritten or custom, how it's delivered, and how services are classified.

Purpose of This Guide

This guide is designed to help businesses navigate Washington's sales and use tax rules related to software and technology services. It focuses on:

• Nexus Considerations: Understanding when businesses must register and collect
  Washington sales tax due to physical or economic presence.
• Taxability of Software & Services: Clarifying the tax treatment of prewritten vs. custom
  software, cloud computing services, and related technology offerings.
• Sourcing Rules: Determining how and where transactions are taxed based on customer
  location and method of software delivery.
• Audit Considerations: Identifying common tax audit triggers and best practices for
  compliance.
• Voluntary Disclosure Agreements (VDAs): Explaining the process for businesses to
  rectify past noncompliance while mitigating penalties and limiting back-tax liability.

Why This Matters for Technology Companies

Washington's sales tax laws impact software companies, SaaS providers, and technology firms in multiple ways:

• Broad Taxability: Washington generally taxes prewritten software regardless of how it's
  delivered (physically or electronically), which differs from many other states that exempt
  electronically delivered software.
• Cloud Computing & SaaS Complexity: Washington treats remotely accessed prewritten
  software (SaaS) as taxable, creating compliance challenges for cloud-based businesses.
• Exemption Documentation: Proper documentation of exempt transactions, including
  custom software development and specific business exemptions, is crucial to avoiding tax
  assessments.
• Compliance Risks: Failure to correctly assess and collect sales tax can result in
  significant penalties, interest, and extended audit exposure.

This guide will walk through Washington's specific sales tax rules governing software, SaaS, and technology-related services while referencing applicable statutes, administrative rules, and Washington Department of Revenue guidance. Throughout the guide, official Washington
Department of Revenue sources will be linked for further reference.
For more information on Washington's retail sales tax generally, visit Washington Department of Revenue's Retail Sales Tax page.

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