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City Business Licenses Moving Online

Aug 29, 2019 - The City is pleased to announce that it has partnered with the Washington State Department of Revenue’s Business Licensing Service (BLS) to offer City business licenses online, effective October 10. This convenient, time-saving new service will allow new or expanding businesses to apply for their city license online along with other state and local licenses that already partner with BLS.

This new online option applies only to City Business Licenses; business owners must still send B&O tax returns directly to the City of Mercer Island.
About six weeks before the current expiration date (in approximately mid-November), the State’s Business Licensing Service will send a license renewal letter with instructions on how to renew City of Mercer Island business licenses online.

Fees, which remain $30, may be paid via E-check or credit card. The first license renewal under the online system may be prorated for less than a year’s duration in order to adjust the City's license expiration date to match with the expiration date BLS already has for a business in its statewide system.

For more information, visit the BLS website at or call BLS at 1-800-451-7985.


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