Income Information

Your tax filing status
Your current taxable income after deductions
Bonus, side income, or other additional income
401(k), IRA, or other deductible amount

Marginal Tax Rate Analysis

Enter your income information to see your marginal tax rate analysis.

Tax Planning Scenarios

Additional Income Impact

Additional Income:
Enter amount to see tax impact

Deduction Tax Savings

Deduction Amount:
Enter amount to see tax savings

Roth Conversion Analysis

Conversion Amount:
Enter amount to see tax cost

Understanding Marginal Tax Rates

What is Marginal Tax Rate?

Definition: The tax rate applied to your last dollar of income
Progressive System: Higher income brackets have higher rates
Planning Tool: Critical for tax planning decisions
Not Total Rate: Different from your effective tax rate

Tax Planning Applications

Income Timing: Defer income to lower-rate years
Deduction Value: Deductions save taxes at marginal rate
Retirement Contributions: Immediate savings at marginal rate
Roth Conversions: Pay taxes at current marginal rate

Common Strategies

Bracket Management: Stay within lower brackets
Income Smoothing: Spread income over multiple years
Deduction Timing: Accelerate deductions in high-rate years
Tax-Loss Harvesting: Offset gains with losses

Advanced Considerations

State Taxes: Add state marginal rates to federal
FICA Taxes: Additional 7.65% on earned income
Net Investment Income: 3.8% surtax on high earners
Phase-outs: Deduction and credit limitations

Important Information

This calculator provides estimates based on 2025 federal tax brackets and rates. Actual marginal tax rates may vary based on specific circumstances, state taxes, FICA taxes, and other factors. The calculator uses simplified calculations and may not account for all tax situations including phase-outs, alternative minimum tax, or net investment income tax. Always consult with a qualified tax professional for personalized advice and comprehensive tax planning.