Personal property tax is due on most property used in conducting business. In Washington State, personal property refers to assets used in conducting a business, other than real estate.Personal property tax is due April 30th. Business owners operating a business in Kitsap County must report their assets to the Kitsap County Assessor. I am currently looking into a Washington State business license. Do I need to use my home address if I do not have a storefront? Some personal property is excluded from taxation. In Washington State, the listing of business personal property is a self-reporting system. Washington State provides the following exemptions from personal property tax (RCW 84.36). • Household goods and personal effects, unless used in a business.