Employees must be paid for all work performed at the rate agreed upon with their employer. Compensation received as part of the contract of hire must also be included when calculating wages.SmartAsset's Washington paycheck calculator shows your hourly and salary income after federal, state and local taxes. Washington employers must pay unemployment taxes on employee wages in the state. Tax reports or tax and wage reports are due quarterly. Figure out your Washington actual paycheck. Learn how to calculate net pay with explanations of gross income, federal, state and FICA taxes. Use Gusto's hourly paycheck calculator to determine withholdings and calculate take-home pay for your hourly employees in Washington.