The Brief Washington single residents now need over $109K annually to live comfortably, ranking the state 7th highest in the U.S. Families consisting of two adults and two kids need $278K to live comfortably in 2025, the SmartAsset study said. Keep reading to learn more about the study and how much a working family of four needs to live comfortably in Washington. Regional comparison, trendsWhy you should care:Of the 50 states, Washington’s single-adult income need trails only Hawaii, Massachusetts, California, New York, New Jersey and Maryland. Nationwide, singles must earn $5,844 more than a year ago, while families need an extra $9,360 to keep pace with rising costs.