Tax timing
Withholding Catch-Up Calculator
Estimate extra withholding per paycheck needed to close a tax shortfall before year end.
Use this for
- W-2 employees
- year-end tax gap
- RSU and bonus-heavy years
Quick facts
Keep the estimate grounded.
Withholding is often treated as paid evenly through the year.
Extra W-4 withholding can be cleaner than late estimates.
Payroll timing still matters.