2006 Federal Tax Brackets
The official IRS tax brackets for tax year 2006, frozen as filed — for amended returns, back taxes and research. 6 rates from 10% to 35%; standard deduction $5,150 single / $10,300 joint.
In 2006, federal income tax rates were 10%, 15%, 25%, 28%, 33%, 35%. The top rate applied above $336,550 (single).
- Rates10% · 15% · 25% · 28% · 33% · 35%
- Std. deduction (single / joint)$5,150 / $10,300
- Personal exemption$3,300
- SourceTax Foundation historical dataset (adjacent years verified vs. Rev. Procs.)
Source: Tax Foundation historical dataset (adjacent years verified vs. Rev. Procs.).
Enter taxable income (after deductions). Ordinary-income brackets only — capital gains, credits, AMT and phase-outs are separate.
2006 brackets — all filing statuses
Single
| Rate | 2006 taxable income |
|---|---|
| 10% | $0 – $7,550 |
| 15% | $7,551 – $30,650 |
| 25% | $30,651 – $74,200 |
| 28% | $74,201 – $154,800 |
| 33% | $154,801 – $336,550 |
| 35% | $336,551 and up |
Married filing jointly
| Rate | 2006 taxable income |
|---|---|
| 10% | $0 – $15,100 |
| 15% | $15,101 – $61,300 |
| 25% | $61,301 – $123,700 |
| 28% | $123,701 – $188,450 |
| 33% | $188,451 – $336,550 |
| 35% | $336,551 and up |
Head of household
| Rate | 2006 taxable income |
|---|---|
| 10% | $0 – $10,750 |
| 15% | $10,751 – $41,050 |
| 25% | $41,051 – $106,000 |
| 28% | $106,001 – $171,650 |
| 33% | $171,651 – $336,550 |
| 35% | $336,551 and up |
Married filing separately
| Rate | 2006 taxable income |
|---|---|
| 10% | $0 – $7,550 |
| 15% | $7,551 – $30,650 |
| 25% | $30,651 – $61,850 |
| 28% | $61,851 – $94,225 |
| 33% | $94,226 – $168,275 |
| 35% | $168,276 and up |
Standard deduction & exemption
| Filing status | Standard deduction |
|---|---|
| Single | $5,150 |
| Married filing jointly | $10,300 |
| Head of household | $7,550 |
| Married filing separately | $5,150 |
Personal exemption: $3,300 per person.
The 2006 brackets in today’s dollars
Adjusted with the CPI-U (2006 annual average → May 2026), a factor of ×1.66. Useful for comparing bracket creep across eras.
| Single-filer threshold | 2006 dollars | Today’s dollars |
|---|---|---|
| 15% bracket started at | $7,551 | ≈ $12,600 |
| 25% bracket started at | $30,651 | ≈ $51,000 |
| 28% bracket started at | $74,201 | ≈ $123,300 |
| 33% bracket started at | $154,801 | ≈ $257,300 |
| 35% bracket started at | $336,551 | ≈ $559,500 |
← 2005 bracketsAll years2007 brackets →
Frequently asked questions
What were the federal tax brackets in 2006?
There were 6 rates in 2006: 10%, 15%, 25%, 28%, 33%, 35%. For single filers the top 35% rate applied to taxable income over $336,550.
What was the standard deduction in 2006?
$5,150 for single filers, $10,300 married filing jointly, $7,550 head of household; the personal exemption was $3,300.
Marginal vs. effective rate — what's the difference?
Your marginal rate is the tax on your last dollar (your bracket). Your effective rate is total tax divided by taxable income — always lower, because earlier dollars fill the lower brackets first. The calculator above shows both.
Why would I need 2006 brackets now?
Filing or amending a 2006 return, negotiating back taxes for that year, checking an audit figure, or research. Brackets never change retroactively once the year closes.
Sources & methodology
Sources: Tax Foundation historical dataset (adjacent years verified vs. Rev. Procs.) · All years: Tax Foundation historical brackets.
Figures transcribed from the primary source listed and cross-checked against the Tax Foundation and Tax Policy Center datasets. Not tax advice.