Washington Bonus Tax Calculator:

No. Washington does not impose a state personal income tax on wages, so employers generally do not withhold Washington state income tax from bonus payments. However, bonuses are still treated as taxable wages for federal payroll tax purposes and may also be subject to Washington-specific payroll deductions.

When a bonus is paid, federal withholding, Social Security, Medicare, Additional Medicare, Washington Paid Family & Medical Leave, and WA Cares Fund deductions may apply. You can use the calculator above, powered by Beyond HCM, to estimate federal withholding, Washington payroll deductions, and take-home pay for bonus payments. The calculator uses 2026 federal payroll assumptions and current Washington payroll contribution estimates.

How to Calculate Bonus Tax in Washington

Supplemental wages—including bonuses, commissions, overtime pay, back pay, and certain additional wage payments—are generally treated as wages for withholding purposes.

For Washington withholding:

– Washington does not impose state personal income tax on wages
– No Washington state income tax withholding is applied in this calculator
– Washington does not have a separate state bonus income tax rate
– Washington employees may be subject to Washington Paid Family & Medical Leave premiums
– Washington employees may also be subject to WA Cares Fund deductions
– Washington does not have a statewide employee Temporary Disability Insurance (TDI) contribution included in this calculator

For federal withholding:

– 22% applies to most supplemental wages
– 37% applies to supplemental wages above $1 million in a calendar year

Key Information on Washington Bonuses

How Are Bonuses Paid in Washington?

Employers may issue bonuses through:

– Check
– Direct deposit
– Pay card

How Do Bonuses Work?

Bonuses are treated as taxable compensation. They are generally subject to:

– Federal income tax withholding
– Social Security tax
– Medicare tax
– Additional Medicare tax, when applicable
– Washington Paid Family & Medical Leave, when applicable
– WA Cares Fund deductions, when applicable

They are typically reported on the employee’s Form W-2 at year-end.

What Is the Washington Bonus Tax Rate?

Washington does not have a state bonus tax rate because Washington does not impose state personal income tax on wages. As a result, bonus payments are generally not subject to Washington state income tax withholding.

For 2026:

– No Washington state income tax withholding is applied to bonus payments
– Federal supplemental withholding generally applies to bonus payments
– FICA taxes, including Social Security and Medicare, generally apply
– Washington Paid Family & Medical Leave may apply to bonus wages, up to the 2026 Social Security wage cap
– WA Cares Fund deductions may apply and are not capped by the Social Security wage base

Are Bonuses Taxed Differently Than Standard Pay?

At the Washington level, bonuses are generally not subject to state income tax withholding because Washington does not impose state personal income tax on wages.

However, bonuses may still be treated as wages for Washington payroll contribution purposes, including Washington Paid Family & Medical Leave and WA Cares Fund deductions, depending on the employee’s wages, year-to-date earnings, exemptions, and payroll setup.

At the federal level, bonuses may be taxed using the supplemental wage method, typically 22% when paid separately, subject to the higher $1 million rule.

How Much Tax Is Taken Out of a Bonus?

For most bonus payments in Washington, estimated withholding may include:

– 22% federal supplemental withholding in most cases
– Social Security tax
– Medicare tax
– Additional Medicare tax, if applicable
– Washington Paid Family & Medical Leave, if applicable
– WA Cares Fund deductions, if applicable

The exact amount taken from a bonus may vary depending on the employer’s payroll setup, the employee’s year-to-date wages, federal thresholds, Washington payroll contribution rules, exemptions, and how the bonus is processed.

Important

This calculator is provided for informational and estimation purposes only. Actual payroll tax withholdings and deductions may vary based on an employee’s tax elections, payroll setup, federal withholding rules, Washington Paid Family & Medical Leave rules, WA Cares Fund rules, and how the bonus is processed. Employers should consult a qualified tax, legal, or payroll professional for official calculations.

If you need help with payroll processing, withholding setup, or tax compliance in Washington, the Beyond HCM team is available to help.

Estimate only — not legal or tax advice. Need help managing Washington payroll more confidently? Contact Beyond HCM for support.