Tax Withholding
Last reviewed 2026-05-11 by Asad Ali, Founder & CEO
Amount deducted from employee wages for federal, state, and FICA taxes.
Tax withholding is the portion of employee wages that employers deduct and remit to taxing authorities as a prepayment of the employee's annual tax liability. Federal income tax withholding is calculated using the employee's Form W-4 (filing status, dependents, multiple jobs, additional withholding, other income, deductions) and the IRS percentage or wage-bracket method published in Publication 15-T. FICA withholding is fixed at 7.65% of wages (6.2% Social Security up to the wage base and 1.45% Medicare on all wages), plus 0.9% additional Medicare for wages above $200,000. State income tax withholding follows similar W-4-style forms (e.g., DE-4 in California, IT-2104 in New York) with state-specific rates and brackets; nine states (Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, Wyoming) have no state income tax to withhold. Local withholding (city or county) applies in some jurisdictions (e.g., New York City, Philadelphia, Ohio cities). Employers must deposit withheld amounts on the IRS's schedule (monthly or semi-weekly based on prior-year liability) and report quarterly on Form 941. Withheld trust-fund amounts that are not deposited expose any "responsible person" (owner, officer, bookkeeper) to the Trust Fund Recovery Penalty of 100% personal liability under IRC Section 6672.
Formula
Federal Income Tax Withholding = Based on Form W-4 and IRS Publication 15-T percentage or wage-bracket method. FICA = (6.2% × min(wages, SS wage base)) + (1.45% × wages) + (0.9% × max(0, wages − $200,000) for Additional Medicare).Example
A married employee earning $5,000 per month files a W-4 claiming married filing jointly, two dependents, and no additional withholding. Using IRS Publication 15-T tables: federal income tax withholding ≈ $325. State withholding (California, 4% effective for this income) ≈ $200. FICA = $5,000 × 7.65% = $382.50. Health insurance premium (pre-tax) = $200. 401(k) contribution (pre-tax) = $300. Net pay = $5,000 − $325 − $200 − $382.50 − $200 − $300 = $3,592.50. The employer deposits $325 federal income tax + $382.50 employee FICA + $382.50 employer FICA match = $1,090 to the IRS via EFTPS on the required schedule, plus $200 to California EDD.
Why It Matters for Your Business
As an employer, you are legally responsible for accurate withholding and timely deposits — and withheld amounts are TRUST FUND money that does not belong to the business; the IRS can pierce the corporate veil and assess unpaid amounts personally against any responsible person.
Practical Tips
- •Use payroll software (Gusto, ADP, Paychex, QuickBooks Payroll) that automatically applies IRS Publication 15-T tables — manual withholding calculation is the most common payroll error
- •Have every new hire complete a current-year W-4 — the 2020 redesign eliminated allowances, and using outdated W-4 logic causes systematic under-withholding
- •Deposit withheld taxes on schedule (monthly or semi-weekly based on lookback liability) — late deposits trigger penalties scaling from 2% to 15% plus the TFRP exposure
- •Reconcile Form 941 quarterly totals to year-end W-2/W-3 totals before filing — mismatches trigger IRS and SSA correction notices that take months to resolve
Common Questions About Tax Withholding
How is tax withholding calculated?
The formula is: Federal Income Tax Withholding = Based on Form W-4 and IRS Publication 15-T percentage or wage-bracket method. FICA = (6.2% × min(wages, SS wage base)) + (1.45% × wages) + (0.9% × max(0, wages − $200,000) for Additional Medicare).. See the worked example below for a step-by-step calculation using realistic numbers.
What is an example of tax withholding?
A married employee earning $5,000 per month files a W-4 claiming married filing jointly, two dependents, and no additional withholding. Using IRS Publication 15-T tables: federal income tax withholding ≈ $325. State withholding (California, 4% effective for this income) ≈ $200. FICA = $5,000 × 7.65% = $382.50. Health insurance premium (pre-tax) = $200. 401(k) contribution (pre-tax) = $300. Net pay = $5,000 − $325 − $200 − $382.50 − $200 − $300 = $3,592.50. The employer deposits $325 federal income tax + $382.50 employee FICA + $382.50 employer FICA match = $1,090 to the IRS via EFTPS on the required schedule, plus $200 to California EDD.
Why does tax withholding matter for my business?
As an employer, you are legally responsible for accurate withholding and timely deposits — and withheld amounts are TRUST FUND money that does not belong to the business; the IRS can pierce the corporate veil and assess unpaid amounts personally against any responsible person.
How does FiscalInsights help with tax withholding?
FiscalInsights tracks tax withholding automatically as part of its AI bookkeeping workflow. Connect your bank accounts and the platform handles categorization, reconciliation, and reporting without manual entry.
Related Terms
More Taxes Terms
Tax Deduction
An expense that reduces taxable income.
Estimated Taxes
Quarterly tax payments made by self-employed individuals and businesses.
Form 1099
IRS forms reporting various types of income other than wages.
Form W-2
Annual statement from employers showing employee wages and taxes withheld.
Payroll Tax
Taxes withheld from employee wages for Social Security and Medicare, plus employer-side employment taxes.
Related Taxes Guides
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