Income Tax
Federal and state income tax obligations for individuals and businesses in the United States.
The United States imposes a progressive federal income tax system with rates ranging from 10% to 37% for the highest earners. Tax residents are taxed on worldwide income, while non-residents are taxed only on US-source income. State and local taxes may also apply depending on your jurisdiction.
🧮 Calculators
3 Tools AvailableFederal Income Tax Calculator
🔥 Top ToolEstimate your federal income tax liability based on current IRS tax brackets.
State Income Tax Calculator
Compare state income tax rates and estimates across major US states.
Effective Tax Rate Calculator
Calculate your effective tax rate and understand your true tax burden.
📘 Tax Guides & Explanations
9 ArticlesHow to File Your Income Tax Return
Step-by-step guide to filing your US federal income tax return, including form selection, deadlines, and common mistakes to avoid.
US Tax Brackets 2026: Federal Rates & Income Slabs
2026 federal income tax brackets and rates (10% to 37%). Calculate taxable income thresholds for Single, Married Joint, and Head of Household.
Itemized Deductions vs Standard Deduction
Compare standard and itemized deductions to determine which option reduces your taxable income more effectively.
Employee FICA Deductions & W-2 Withholding Guide
Understanding employee FICA taxes, Social Security wage base thresholds, 0.9% Additional Medicare Tax, and claiming excess FICA credits on Form 1040.
Self-Employment Tax & Schedule C Filing Guide
Complete guide to Schedule SE, calculating the 15.3% self-employment tax, claiming the 50% above-the-line deduction, and paying quarterly estimated taxes on Form 1040-ES.
Pass-Through Entity Tax Guide for Individuals
How Sole Proprietorships, Single-Member LLCs, Partnerships, and S-Corps pass income through to individual Form 1040, plus the Section 199A QBI deduction.
Personal Capital Gains Tax Guide: Rates & NIIT
Individual investor rules: short-term vs long-term rates (0%, 15%, 20%), the 3.8% Net Investment Income Tax (NIIT), and Schedule D reporting.
Primary Residence Property Sale Tax Guide
IRC Section 121 capital gains exclusion for homeowners ($250,000 single / $500,000 married), the 2-out-of-5-year rule, and Form 8949 reporting.
Inheritance & Beneficiary Income Tax Guide
Tax guidance for heirs and beneficiaries: Section 1014 step-up in basis, inherited IRA 10-year distribution rules, and lifetime cash gift income tax status.
❓ Frequently Asked Questions
🌐 Related Tax Categories
Payroll Tax
Employer and employee payroll tax obligations including FICA and self-employment taxes.
Corporate Tax
Federal corporate income tax and business entity taxes.
Capital Gains Tax
Tax on profits from the sale of investments and property.
Estate & Inheritance Tax
Federal estate tax and state inheritance taxes.
IRS Support & Resources
IRS phone numbers, online tools, filing help, and taxpayer assistance resources.
Tax Planning Strategies
Year-round tax planning tips, strategies to reduce taxes, and optimization techniques.
Finsiva researches tax rules and calculation parameters using official government sources and reviews financial content for accuracy, methodology, and statutory changes.