W4 Withholding For 2025. Use the estimator at gov/w4app for the most accurate withholding for this step (and steps 3 and 4) 2. Make sure your number of allowances claimed on your w4 is accurate based on your tax situation.
โ having too little withheld from your paychecks could mean an unexpected tax bill or even a penalty for underpayment. โ it details how much the employer paid you, and how much withholding tax was deducted from your pay during the tax year.