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A US federal income tax calculator estimates tax liability based on filing status, taxable income, and the progressive marginal tax bracket system updated annually.
공식
US Federal Tax = Σ (income in bracket × bracket rate); Standard deduction 2024: $13,850 (single), $27,700 (married)
- AGI
- Adjusted Gross Income ($)
- t
- Tax bracket rate (%)
- TD
- Total tax due ($)
단계별 가이드
- 1Tax is calculated progressively — only income within each band is taxed at that rate
- 2Standard deduction 2024: $14,600 (single), $29,200 (married filing jointly)
- 3Taxable income = Gross income − Deductions − Exemptions
- 4Effective tax rate = Total tax / Gross income
풀어진 예시
입력
$75,000 income, single filer, standard deduction 2024
결과
Taxable = $60,400; Tax = $1,160×10% + $33,550×12% + $25,690×22% ≈ $9,669
자주 묻는 질문
How do tax brackets work?
Progressive: each bracket applies only to income in that range. Earning more never results in lower net income.
What's the difference between tax rate and effective rate?
Marginal = your highest bracket. Effective = total tax / total income. Effective always lower in progressive system.
Should I claim deductions or standard deduction?
Claim the higher amount. Standard deduction 2024: $13,850 (single), $27,700 (MFJ). Itemize if > standard.