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Second Job Tax Calculator

Calculate the incremental after-tax value of a second job rather than taxing it in isolation.

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Editable assumptionsU.S.-first planning toolReviewed August 2026

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What this tool can tell you

Uses simplified 2026 federal brackets and payroll tax. Withholding can differ from final liability; Form W-4, credits, deductions, state tax, and multiple-employer Social Security adjustments matter.

Important: This is a general educational planning tool, not payroll, tax, benefits, employment, investment, or legal advice. It does not create an entitlement, determine classification or enforceability, calculate a filing position, or replace current government guidance, plan documents, written agreements, or qualified advice for your facts and jurisdiction.

Primary reference: IRS Tax Withholding Estimator. Rules, rates, programs, thresholds, and forms can change; verify them before acting.