Tax big companies in Seattle? Depends. Also, we are a big company in Seattle. Eleven large employers in Seattle say they are willing to pay a business tax to fund affordable housing, mental health, and public safety in King County. They don’t quite endorse a bill in the state legislature that would allow King County to tax large businesses with high earners, however. Rather, they say any tax should be “imposed at a reasonable level with accountability for results in homelessness and affordable housing.”