Washington Department of Revenue

Apr 9, 2026

Access the Washington Department of Revenue here.

The Washington Department of Revenue is the state agency responsible for administering and enforcing tax laws in the state of Washington. They work to ensure compliance with state tax regulations and provide resources and support to taxpayers to help them understand and fulfill their tax obligations.

Agency Accounts

Washington Unified Business Identifier (UBI)

Access your online accounts:

The Washington Unified Business Identifier (UBI) allows you to set up and manage the following information:

  • Unified Business Identifier (UBI)

Zero payroll penalties, zero distractions.

More from the blog

Learn how to keep your business compliant in all 50 states across payroll, HR, Secretary of State, and tax.

Multistate Compliance Mistakes You're Still Making

Most businesses are managing modern compliance requirements with tools built for a different era. Ten years ago, spreadsheets and email reminders could handle multistate compliance. Multistate compliance mistakes were rare because state payroll was simpler. Employees worked from offices. State compliance requirements changed slowly. And companies expanded more deliberately, usually one state at a time. But that world no longer exists. Today’s compliance management landscape is constantly shifting. Remote employees scattered across state lines overnight. Regulations update continuously. And what used to be manageable for employers has become a tangled knot of requirements that outdated tools simply can’t manage.

Paul Boynton | Sep 10, 2025

Professional Limited Liability Company Explained

Licensed professionals looking to open their own office, firm, or practice have several options for a company structure. Some professionals opt for a LLP (limited liability partnership) or a PC (professional corporation). A PLLC, meaning a professional limited liability company, is a possible consideration when making the important decision of how to structure your business. A PLLC (if permitted in your state) can be a solution if you meet the eligibility criteria. Here’s what you should consider before making any major business decisions surrounding the company structure that will work best for you.

Kaitlin Edwards | Feb 24, 2024

HR to Employee Ratio: How To Make Sure Your Team Is Supported

Most HR professionals juggle recruitment, compliance, benefits, and more, but one key metric often goes unnoticed: the HR-to-employee ratio. It tells you whether your HR team has the capacity to support your workforce effectively or if cracks are forming under the pressure. For businesses operating across multiple states or managing remote teams, the stakes are even higher. A poorly balanced HR-to-employee ratio not only compromises efficiency but also opens the door to compliance risks, dissatisfied employees, and missed opportunities for strategic growth.

Gabrielle Sinacola | Dec 5, 2024

Ready to get started?

Schedule a free consultation to see how Mosey transforms business compliance.