Washington Employment Security Department

Please Note

We are a service company that can help you file with the Washington Employment Security Department. We are not associated with this nor any other government agency. We offer paid services and software to help you file. You are not required to purchase our service to file - you may file directly with this agency without using our service.

Contact Information

Mailing address:
PO Box 9046
Olympia, WA 98507

Phone: (888) 836-1900

Web: Home
Email: employeraccounts@esd.wa.gov


We track the following licenses with the Washington Employment Security Department in order to provide compliance services to our clients. As a client, you see this and other Compliance Core™ data in License Manager in-line with your licenses.

A laptop placed on a desk with our License Manager software on display

Washington Professional Employer Organization License

Agency:Washington Employment Security Department

WAC 192-300-210

Initial Registration


Register Your Business


There is not a unique application form to register with the Employment Security Department. Simply apply for a state business license and check the boxes to indicate you have or plan to hire employees.

Required Attachments:

  • Employment Security Number
  • Names and Social Security number of each corporate officer, owner, or limited liability company member
  • Physical address in Washington State where payroll records are available for inspection
  • Signed power of attorney form

Renewal Not Required

Not required

Employment Security Department business registrations do not need to be renewed, however, reporting requirements apply to registered businesses.

Financial Reporting
Quarterly Tax and Wage Report


Pay online using EAMS

Pay by mailing a check
The paper remittance listing(s), labeled "ICESA WASHINGTON REPORTING," will list the nine-digit ES reference number, amount remitted, check number, federal ID number, Unified Business Identifier (UBI) and business name, in that order.

  • Remittance listings will have a maximum of 50 accounts per page and each page will include a total for that page.
  • Include information for one account (nine-digit ES reference number) per line.
  • If submitting more than one report, submit a separate check for each account with the ES reference number for that payment listed in the memo field. The amount of the check must equal the Total payment due and amount remitted fields listed in the T Record (see bulk filing format specifications for details).
  • Put the checks in the same order as the remittance-listing page.
  • Mail each remittance-listing page, with the corresponding checks to:
    • Standard:
      Employment Security Department
      PO Box 34467
      Seattle, WA  98124-1467
    • Priority mail only:
      Employment Security Department
      1109 Pacific Avenue
      Tacoma, WA  98402
Filing Method:

Mail or online.

Agency Fee:



Quarterly by the end of the month following each quarter. When a due date falls on a weekend or state holiday, your report may be postmarked the following business day.


WAC 192-300-210

  • All employers must file a tax and wage report every quarter, including employers who have no payroll for a given quarter. If you fail to submit a report on time, you will be charged a penalty of $25 per report (RCW 50.12.220).
  • You will also have to pay a penalty if you are late on a tax payment, or if you file an incomplete report or file on the wrong form.
  • Other penalties apply for knowing misrepresentation of payroll (see RCW 50.12.220(3)), for failing to keep required records (see RCW 50.12.070(3)), and for knowingly failing to register with us as required (see RCW 50.12.072).
  • File a separate electronic report for each client employer using electronic reporting using EAMS, or UIWebTax
  • You also have the option of filing separate paper reports for each client employer (Forms 5208A and 5208B).
  • If you file separately for each client employer, you also must submit a separate tax payment for each client employer. Payments can be made by check or online.

Supplemental Reporting
Client Company Registration


Client Registration Form


Instructions for Submitting Client Data Electronically to Washington
State Employment Security Department

Agency Fee:



Within 30 days for any client employer registering with the department for the first time and within 30 days of the effective date whenever the professional employer organization and a client employer enter a professional employer agreement.

Required Attachments:

PEOs that have client companies in Washington must provide the department with all of the following information for each client company:

  • Name and address
  • Unified business identifier (UBI Number)
  • Employment Security reference number (current or former)
  • Names and Social Security number of each corporate officer, owner or limited liability company member
  • Physical address in Washington State where payroll records will be available for inspection
  • A signed power of attorney form

Related Government Agencies

Explore other Washington government agencies we can help you stay compliant with:

Order Registered Agent Service

In my opinion, their "Human Touch" element is what really makes this company stand out! I wouldn't go anywhere else!
JanaeLaw Offices of Donald W. Hudspeth, PC
It's awesome to know that Harbor Compliance is looking out for my customers' best interests and will only do what's right for them.