Federal Income Tax Guide: Brackets, Deductions, Credits & Calculators
Calculators & Tools (12)
Guides & Articles (9)
Understanding how federal income tax works is the foundation of every financial decision. Whether you're optimizing withholding, choosing between standard and itemized deductions, or figuring out if you owe AMT, the tools and guides in this hub will give you clarity and confidence.
How Federal Income Tax Works
The US uses a progressive marginal tax system: each dollar of income is taxed at a rate that depends on which bracket it falls into — not a flat rate on your total income.
For 2026 (OBBBA rates):
| Rate | Single | Married Filing Jointly |
|---|---|---|
| 10% | Up to $11,925 | Up to $23,850 |
| 12% | $11,926–$48,475 | $23,851–$96,950 |
| 22% | $48,476–$103,350 | $96,951–$206,700 |
| 24% | $103,351–$197,300 | $206,701–$394,600 |
| 32% | $197,301–$250,525 | $394,601–$501,050 |
| 35% | $250,526–$626,350 | $501,051–$751,600 |
| 37% | Over $626,350 | Over $751,600 |
Standard Deduction vs. Itemizing
For 2026, the standard deduction is $15,000 (single), $30,000 (married filing jointly), plus a new $6,000 senior deduction for taxpayers 65+. Most taxpayers benefit from taking the standard deduction.
Itemizing makes sense only when your total deductible expenses (mortgage interest, state taxes up to $10,000, charitable contributions, medical expenses over 7.5% of AGI) exceed the standard amount.
Key Tax Credits
Child Tax Credit
Up to $2,200 per qualifying child (under 17) for 2026. Partially refundable. Phases out above $200,000 (single) or $400,000 (joint).
Earned Income Tax Credit (EITC)
One of the most valuable refundable credits for low-to-moderate income workers. Worth up to $7,830 for families with 3+ children. Requires earned income.
No Tax on Overtime (2025–2028)
A temporary deduction of up to $12,500 for overtime pay, potentially saving up to $4,625. Phase-outs apply above $150,000 (single) or $300,000 (joint). Must be W-2 overtime compensation.
Alternative Minimum Tax (AMT)
The AMT is a parallel tax system that eliminates many deductions. You pay the higher of your regular tax or your AMT. The 2026 exemptions are $137,000 (single) / $220,000 (married), with a 50% phase-out rate — making the effective top phase-out income much higher than prior years.
Common AMT triggers: Incentive Stock Options, high state tax deductions, large depreciation, and tax-exempt bond interest.
Withholding and Estimated Taxes
Getting your withholding right avoids both underpayment penalties and interest-free loans to the IRS:
- W-4 controls federal withholding from paychecks
- Safe harbor: Withhold at least 100% of last year's tax (110% if AGI > $150,000) to avoid penalties
- Quarterly estimates: Required if you expect to owe $1,000+ from non-wage income
2026 Tax Law Changes (OBBBA)
The One Big Beautiful Bill Act made significant changes to federal tax law, including new senior deductions, modified QBI rules, changes to SALT cap treatment, and expanded child tax credits. Our complete guide covers every provision.
Paycheck & Withholding
Understanding what your paycheck looks like after taxes is essential for budgeting and financial planning. The Paycheck After-Tax Calculator shows exactly how federal withholding, FICA taxes, and state taxes combine to reduce your gross pay to take-home pay.
Modified Adjusted Gross Income (MAGI) is a key figure used throughout the tax code — it starts with AGI and adds back specific deductions (student loan interest, IRA deductions, foreign earned income exclusions, and others depending on the context). MAGI determines your eligibility for Roth IRA contributions, the premium tax credit, the NIIT, and many other phaseouts. Use the MAGI Calculator to compute your MAGI for specific purposes.
Related Hubs
- Capital Gains Tax Hub — How investment gains interact with ordinary income
- Retirement Planning Hub — Reducing income through retirement contributions
- Business & Self-Employment Hub — QBI deduction, self-employment tax, and business credits
- State Tax Hub — State taxes layered on top of federal liability
- Education Savings Hub — Education credits and their interaction with AGI limits
- Payroll Tax Hub — Paycheck calculations, FICA, and bonus withholding