You can use Washington's child support economic table to find the total support obligation. Then calculate your share based on the proportion of income you contribute compared to your spouse. Typically payments will last until a child reaches age 18 or graduates from high school.How long to recieve first child support check?
It can take anywhere from two weeks to two months for the child support order to make it's a way through the agency and for them to begin sending you child support. Some agencies are able to do this quicker than others due to having fewer cases.