Tax Withholding Per Paycheck
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Tax withholding is the portion of income tax your employer deducts from your paycheck and sends directly to the tax authority on your behalf, spreading your estimated annual tax liability evenly across each pay period rather than requiring one lump payment at year-end.

It typically applies an estimated tax rate (or a rate derived from your annual income and filing situation) to your gross pay for the period, giving an approximate amount withheld from that specific paycheck.

Actual employer withholding calculations use official tax withholding tables or formulas that account for filing status, number of dependents, additional withholding elections, and progressive tax brackets — all more detailed than a simplified estimate can fully replicate.

If too much is withheld, you'll typically receive a refund when you file your annual tax return; if too little is withheld, you may owe additional tax and potentially a penalty. Adjusting your withholding elections with your employer can help bring the total withheld closer to your actual tax liability.

Yes, since withholding calculations are generally based on the pay for that period annualized, a higher paycheck (from a raise, bonus, or overtime) in a given period can result in a higher withholding rate applied to that specific check, even if your overall annual tax rate doesn't change.