OpenChainGraph Suite · ART-338 · US Payroll Compliance

Federal Withholding Calculator

Federal income tax withholding via the IRS Publication 15-T (2025) percentage method, Worksheet 1A, for a 2020-or-later Form W-4. Supports single/MFS, married filing jointly, and head of household, plus Step 3 dependents credit and Step 4(a)/(b)/(c) adjustments. Feeds ART-339 Gross-to-Net Payroll Calculator.

IRS Pub 15-T (2025) Worksheet 1A Percentage Method Federal Only

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⚠ Federal withholding only. Not tax advice. State and local withholding are out of scope for this tool. The Form W-4 Step 2 multiple-jobs checkbox withholding table is not implemented in v1 — results assume the box is not checked.

Pay & Filing Status

Gross wages this pay period ($)

Pay frequency

Filing status (Form W-4 Step 1(c))

Form W-4 Steps 3 & 4 (optional)

Step 3: dependents credit ($/yr)

Step 4(a): other income ($/yr)

Step 4(b): deductions ($/yr)

Step 4(c): extra withholding ($/period)

Worksheet 1A Detail

Execution Hash (SHA-256)