For US W-2 employees
Check the money move
before you make it.
Simple calculators for confusing paycheck, tax, debt, and work benefit decisions. No uploads. No accounts. Clear estimates and next steps.
Browser-local calc IRS-sourced data Estimates only
Live preview - Bonus Withholding Calculator
Was my bonus withholding rate reasonable?
$8,500
$1,870
Effective withholding rate
IRS flat supplemental rate: 22%
22.0%
Matches flat rate. Withholding is not final tax; your return reconciles the difference.
No document uploads required
Numbers stay in your browser
Official sources linked on every page
Estimates, not advice
First-stage tools
Paycheck
Paycheck Change Checker
Compare two paychecks, annualize the change, and see the paystub lines most worth checking.
Previous net payCurrent net payWhat changed
Bonus
Bonus Withholding Calculator
Compare bonus federal withholding with IRS supplemental wage flat-rate references.
Bonus amountFederal withheld
Debt & savings
Emergency Fund vs Credit Card Debt Checker
Check whether starter emergency savings, high-interest debt payoff, or a split may make sense.
Card APREmergency savingsMonthly expenses