How federal tax brackets really work
The U.S. uses a progressive system. That means different slices of your taxable income are taxed at different rates — not that your entire income jumps to the top rate when you cross a threshold.
Marginal vs. effective rate
- Marginal rate — the rate on your next dollar of ordinary income.
- Effective rate — total tax ÷ total income. Almost always lower than your marginal rate.
Example: if you land partly in the 22% bracket, only the dollars above the 12% cap are taxed at 22%. Earlier slices still pay 10% and 12%.
2026 federal income tax brackets
Ordinary income rates for Tax Year 2026 (returns filed in 2027). Thresholds are taxable income ranges.
| Rate |
Single |
Married filing jointly |
Head of household |
| 10% | $0 – $12,400 | $0 – $24,800 | $0 – $17,700 |
| 12% | $12,401 – $50,400 | $24,801 – $100,800 | $17,701 – $67,450 |
| 22% | $50,401 – $105,700 | $100,801 – $211,400 | $67,451 – $105,700 |
| 24% | $105,701 – $201,775 | $211,401 – $403,550 | $105,701 – $201,775 |
| 32% | $201,776 – $256,225 | $403,551 – $512,450 | $201,776 – $256,200 |
| 35% | $256,226 – $640,600 | $512,451 – $768,700 | $256,201 – $640,600 |
| 37% | $640,601+ | $768,701+ | $640,601+ |
2026 standard deduction
- Single or married filing separately: $16,100
- Married filing jointly: $32,200
- Head of household: $24,150
Figures follow IRS inflation adjustments for 2026. Always confirm on IRS.gov before filing.
Standard deduction vs. itemizing
Most filers take the standard deduction — a fixed amount based on filing status (and sometimes age or blindness). For 2026 that starts at $16,100 (single) or $32,200 (joint). You only itemize on Schedule A if your qualified expenses add up to more than that standard amount.
Common itemized categories
- Medical expenses above 7.5% of AGI
- State and local taxes (SALT), federally capped (commonly $10,000)
- Home mortgage interest (subject to loan limits)
- Charitable contributions (with percentage limits)
High property taxes + mortgage interest + charity can tip the scale in high-cost areas — but the SALT cap means many dual-income households still take the standard deduction.
Self-employment tax in plain English
If you earn net profit from a trade or business (freelancing, gig work, sole prop), you generally pay self-employment (SE) tax — roughly Social Security and Medicare for people who don’t have an employer withholding FICA.
- SE tax is calculated on 92.35% of net profit.
- Combined rate is about 15.3% (12.4% Social Security + 2.9% Medicare), with Social Security only up to the annual wage base ($184,500 for 2026).
- You can usually deduct half of SE tax when figuring AGI.
- W-2 wages in the same year share the Social Security wage base with SE income.
SE tax is separate from income tax. Budget for both if you’re a 1099 contractor.
Why you get a refund (or owe)
A refund isn’t a “bonus” from the IRS — it’s usually the difference between what you already paid (withholding and estimates) and your final tax after credits.
- Too much withheld → larger refund, smaller paychecks during the year.
- Too little withheld → balance due (and possibly underpayment penalties).
- Credits (like the Child Tax Credit) can reduce tax and sometimes create a refundable amount.
Adjusting Form W-4 or estimated payments mid-year can smooth the surprise at filing time.
Short-term vs. long-term capital gains
Assets held one year or less usually produce short-term gains taxed at ordinary income rates. Assets held more than one year often qualify for preferential long-term rates of 0%, 15%, or 20%, depending on taxable income.
Higher-income investors may also face the Net Investment Income Tax (NIIT) — not modeled in our simple calculator.
Reading your paycheck deductions
Typical employee withholdings include federal income tax, Social Security (6.2% up to the wage base), Medicare (1.45%), and often state tax. Pre-tax benefits like traditional 401(k) and HSA contributions reduce taxable wages for federal income tax (rules differ for FICA).
