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Marginal Tax Rate Calculator

Understand how every dollar you earn is taxed. Optimize your income strategy for 2025 and 2026.

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Quick Answer
Your marginal tax rate is the rate you pay on your last dollar of taxable income, not on your whole income. Federal brackets for 2025 and 2026 run from 10% to 37%, and only the income inside each bracket is taxed at that bracket's rate. Enter your income, filing status, and deductions below to see your marginal rate, effective rate, and estimated federal tax.

Example figures, replace with yours

$150,000
$0$250k$500k$750k$1M+
$
Marginal Rate
24.0%

Rate on your next dollar

Estimated Fed Tax
$24,734

Total ordinary income tax

Effective Rate
16.5%

Average rate overall

Taxable Income
$133,900

Gross minus deductions

Strategic Insight

Your taxable income of $133,900 puts you in the 24.0% bracket. This bracket starts at $105,700. Every dollar you shift via pre-tax retirement contributions, S-Corp distributions, or deductions saves you 24.0% in federal income tax immediately.

Book your free 30-minute tax fit call to talk through your next steps.

Tax planning slots are limited before year-end.

Worked example

A single filer with $150,000 of ordinary income in 2026

These are the calculator's prefilled defaults: tax year 2026, single, $150,000 of gross ordinary income, and the standard deduction.

Inputs

Worked example inputs
Tax year2026
Filing statusSingle
Ordinary income (gross)$150,000
DeductionStandard ($16,100)

Calculator output

Worked example calculator output
Taxable income$133,900
Marginal rate24.0%
Bracket starts at$105,700
Estimated federal income tax$24,734
Effective rate (tax / gross income)16.5%

Taxable income of $133,900 fills the 10%, 12% and 22% brackets and puts the last $28,200 in the 24% bracket. So the next $1,000 of deductions saves $240 of federal income tax, while the average rate on the whole $150,000 is 16.5%.

Methodology

How this calculator works

The calculator subtracts your deduction from gross ordinary income and runs the result through the federal brackets for the year and filing status you pick.

Formulas

  • Taxable income = gross ordinary income minus the standard deduction (2026: $16,100 single or married filing separately, $32,200 married filing jointly, $24,150 head of household) or the itemized amount you enter, not below 0.
  • Tax = the sum of each bracket's rate x the taxable income inside that bracket.
  • Marginal rate = the rate of the bracket that holds your last dollar of taxable income. Effective rate = tax / gross income.

Assumptions

  • All income is ordinary income (wages, business, interest, retirement distributions).
  • The itemized amount you enter is already net of the SALT cap and other limits.
  • 2025 uses the 2025 brackets and standard deductions; 2026 uses the 2026 figures.

What it ignores

  • Long-term capital gains and qualified dividends, which use the 0%, 15% and 20% rates.
  • Self-employment tax, Additional Medicare tax, NIIT, AMT and state income tax.
  • Above-the-line deductions, the QBI deduction, the additional standard deduction for age 65 or blind, and credits.

Sources

Primary sources

  1. IRS Rev. Proc. 2025-32: 2026 inflation adjustments: 2026 tax rate tables (section 4.01) and standard deductions (4.14)
  2. IRS: tax inflation adjustments for tax year 2026: summary of the 2026 brackets and standard deduction
  3. IRS Rev. Proc. 2024-40: 2025 inflation adjustments: 2025 tax rate tables
  4. 26 U.S. Code Section 1: tax imposed: the 10% to 37% rate structure
  5. 26 U.S. Code Section 63: taxable income defined: standard deduction, including the 2025 amounts as amended in 2025
  6. IRS: federal income tax rates and brackets: how marginal brackets apply
  7. IRS Topic 551: standard deduction

Written by Bryan Martin, CPA, Managing Partner and Founder of Taxstra. Last reviewed October 20, 2026. Taxstra is a CPA firm serving 1,000+ clients in all 50 states.

Educational, not individualized tax advice.

Marginal vs. Effective Rate: Why the Difference Matters

Most people confuse their marginal rate with their effective rate. The effective rate is your average, total tax divided by total income. The marginal rate is the rate on the last dollar earned. These two numbers can differ substantially.

The marginal rate is the number that matters for planning decisions. If you're in the 32% bracket, every $1,000 you can deduct through a Solo 401(k) contribution saves you $320 in federal income tax. Every $1,000 of ordinary income you convert to long-term capital gains saves you $320 minus whatever the capital gains rate is. The marginal rate is your planning leverage ratio.

What This Calculator Doesn't Show

This tool covers federal ordinary income tax only. For a complete picture of your tax burden, you also need to account for self-employment tax (up to 15.3% on net business income), the Net Investment Income Tax (3.8% on investment income above threshold), the Additional Medicare Tax (0.9%), state and local income taxes, and the preferential rates on qualified dividends and long-term capital gains.

High-income professionals, physicians with 1099 income, S-Corp owners, real estate investors, often find their total marginal rate exceeds 50% when all taxes are stacked. The federal income tax bracket is just the starting point. Use the S-Corp calculator to model the self-employment tax component separately.

Tax LayerFederal Income Tax (ordinary)
Rate10%-37%
Who It Applies ToEveryone with taxable income
Tax LayerSelf-Employment Tax
Rate15.3% / 2.9%
Who It Applies ToSole props, partnerships, S-Corp salary
Tax LayerNet Investment Income Tax
Rate3.8%
Who It Applies ToInvestment income above $200K/$250K threshold
Tax LayerAdditional Medicare Tax
Rate0.9%
Who It Applies ToWages/SE income above $200K single/$250K MFJ
Tax LayerState Income Tax
Rate0%-13.3%
Who It Applies ToVaries by state
Tax LayerCapital Gains Tax
Rate0%/15%/20%
Who It Applies ToLong-term gains and qualified dividends

Strategies That Lower Your Marginal Bracket

Understanding your marginal rate is the prerequisite for evaluating deduction strategies. Here are the highest-leverage moves for high-income earners, ranked by typical impact:

  • Solo 401(k) contributions: Up to $72,000 per year (2026) in pre-tax contributions if you have self-employment income through an S-Corp. The employer contribution alone can be up to 25% of W-2 salary from the S-Corp.
  • S-Corp election: Moves distributions out of the self-employment tax base, reducing the combined marginal rate on that income by up to 15.3%.
  • Accountable plan reimbursements: Home office, mileage, cell phone, and travel expenses reimbursed tax-free through your S-Corp don't appear anywhere on your return.
  • Cost segregation / bonus depreciation: For real estate owners, accelerating depreciation can offset significant ordinary income in the year of purchase.
  • Qualified Business Income deduction (Section 199A): Up to 20% deduction on pass-through business income for eligible businesses below phase-out thresholds. See our complete QBI deduction guide for eligibility and SSTB rules.
S-Corp Savings Calculator
Model payroll tax savings
Hiring Kids Calculator
Family income shifting
S-Corp Election Guide
Complete S-Corp guide

Frequently Asked Questions

What is a marginal tax rate?

Your marginal tax rate is the rate you pay on your last dollar of taxable income, the rate that applies to the top slice of income. The U.S. has a progressive tax system: the first dollars you earn are taxed at 10%, then higher brackets apply to successively higher income layers. In 2026, the brackets for single filers range from 10% on income up to $12,400 to 37% on income above $640,600. Only the income within each bracket is taxed at that rate, not your entire income.

What is the difference between marginal and effective tax rate?

The marginal rate is what you pay on the last dollar earned. The effective rate is your total federal income tax divided by your gross income, the average rate across all your income. If you earn $200,000 single in 2026 and take the standard deduction, your federal income tax is about $36,734, an effective rate of 18.4%, even though you are in the 24% marginal bracket. The marginal rate matters most for planning decisions: it tells you how much a deduction is actually worth.

Why does this calculator only show federal ordinary income tax?

Federal ordinary income tax is the foundational layer, but your total tax picture includes self-employment tax (15.3% on net business income), the Net Investment Income Tax (3.8% on investment income above certain thresholds), the Additional Medicare Tax (0.9% on wages and SE income above $200,000/$250,000), state income taxes, and capital gains taxes at preferential rates. This calculator provides the federal ordinary income tax baseline, a starting point for understanding your bracket and planning deductions.

When does itemizing beat the standard deduction?

Itemizing is worth it when your qualifying deductions exceed the standard deduction ($16,100 single / $32,200 MFJ for 2026). Common itemized deductions include mortgage interest, state and local taxes up to the SALT cap ($40,400 for 2026, $20,200 married filing separately, reduced by 30% of modified AGI over $505,000 but not below $10,000), charitable contributions, and qualifying medical expenses above 7.5% of AGI. Most taxpayers take the standard deduction, but high earners with significant mortgage interest, large charitable gifts, or medical expenses may benefit from itemizing.

How can I lower my marginal tax rate?

Several strategies can push income below a bracket threshold: maximizing pre-tax retirement contributions (401(k), SEP-IRA, Solo 401(k)), electing S-Corp status to shift self-employment income, deducting business expenses through an accountable plan, contributing to an HSA, harvesting investment losses to offset gains, and accelerating deductions into the current year. The marginal rate shown in this calculator tells you exactly how much each deduction dollar saves you in federal income tax.

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Your Bracket Is a Planning Opportunity

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Tax planning slots are limited before year-end.