Illinois publishes no flat bonus rate, so bonuses here use the aggregate method.
State & Date
Earnings
Estimates for informational purposes — not tax or legal advice.
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State by StateState-specific estimates
Uses Your Check DateRates for the date you enter
Estimates OnlyFor planning purposes
Aggregate Bonus Calculators by State
Aggregate-method bonus calculations by state
ALAlabamaAKAlaskaAZArizonaARArkansasCACaliforniaCOColoradoCTConnecticutDEDelawareFLFloridaGAGeorgiaHIHawaiiIDIdahoILIllinoisINIndianaIAIowaKSKansasKYKentuckyLALouisianaMEMaineMDMarylandMAMassachusettsMIMichiganMNMinnesotaMSMississippiMOMissouriMTMontanaNENebraskaNVNevadaNHNew HampshireNJNew JerseyNMNew MexicoNYNew YorkNCNorth CarolinaNDNorth DakotaOHOhioOKOklahomaOROregonPAPennsylvaniaRIRhode IslandSCSouth CarolinaSDSouth DakotaTNTennesseeTXTexasUTUtahVTVermontVAVirginiaWAWashingtonWVWest VirginiaWIWisconsinWYWyomingDCDistrict of Columbia
Frequently Asked Questions
Common questions about payroll tax calculations
Your employer adds the bonus to the regular wages paid in the same pay period, figures withholding as if the total were one paycheck, then subtracts what was already withheld on the regular wages. Because the combined amount looks like a bigger paycheck, withholding on the bonus can be higher than with the flat method.
If a bonus is paid together with regular wages and the two amounts aren't listed separately, withholding is figured on the total as one payment. It's also used when no income tax was withheld from your regular wages this year or last, and employers can choose it for a bonus paid separately.
Not in the end. Withholding on a bonus can look high, but it's a prepayment: your tax for the year is settled on your tax return, where a bonus is taxed like any other wages.
Yes. A bonus is wages for Illinois income tax, so Illinois tax is withheld from it too. The calculator estimates Illinois withholding for the check date you enter.
Not necessarily. Results are estimates for planning purposes. The Tuxelo payroll engine looks up rates for the check date you enter, but your actual paycheck can differ because of employer-specific payroll settings, benefits, year-to-date wages, and local rules. Check important numbers with your employer or a tax professional.