For the 2017 tax year and earlier, the pre-TCJA tax brackets used seven marginal rates: 10%, 15%, 25%, 28%, 33%, 35%, and 39.6%. Each rate applied only to the income falling within its range, so crossing into a higher bracket never pushed all of your earnings to that rate. Alongside those brackets, filers subtracted a smaller standard deduction and a $4,050 per-person exemption to arrive at the taxable income the rates acted on.
How the Marginal Rates Worked
The seven rates stacked. Your first dollars were taxed at 10%, the next layer at 15%, and so on up the ladder, regardless of your total income. A raise that nudged you into the 28% bracket didn’t reclassify your earlier income; it only meant the new dollars above that threshold were taxed at 28%.
The Tax Cuts and Jobs Act kept seven brackets but changed most of the rates, replacing 15% with 12%, 25% with 22%, 28% with 24%, 33% with 32%, and the top 39.6% with 37%.1Congress.gov. Expiring Provisions in the Tax Cuts and Jobs Act (TCJA, P.L. 115-97)
2017 Bracket Thresholds by Filing Status
The dollar ranges below are the inflation-adjusted thresholds the IRS set for 2017, applied to taxable income after deductions and exemptions.
Single Filers
- 10%: up to $9,325
- 15%: $9,326 to $37,950
- 25%: $37,951 to $91,900
- 28%: $91,901 to $191,650
- 33%: $191,651 to $416,700
- 35%: $416,701 to $418,400
- 39.6%: over $418,400
The 35% band was unusually narrow for singles, covering roughly $1,700 of income before the top rate kicked in.2Internal Revenue Service. Revenue Procedure 2016-55
Married Filing Jointly
- 10%: up to $18,650
- 15%: $18,651 to $75,900
- 25%: $75,901 to $153,100
- 28%: $153,101 to $233,350
- 33%: $233,351 to $416,700
- 35%: $416,701 to $470,700
- 39.6%: over $470,700
Joint filers had wider ranges at most levels.2Internal Revenue Service. Revenue Procedure 2016-55
Head of Household
- 10%: up to $13,350
- 15%: $13,351 to $50,800
- 25%: $50,801 to $131,200
- 28%: $131,201 to $212,500
- 33%: $212,501 to $416,700
- 35%: $416,701 to $444,550
- 39.6%: over $444,550
Head of household sat between single and joint, giving qualifying single parents a meaningful advantage over filing as single.2Internal Revenue Service. Revenue Procedure 2016-55
Married Filing Separately
- 10%: up to $9,325
- 15%: $9,326 to $37,950
- 25%: $37,951 to $76,550
- 28%: $76,551 to $116,675
- 33%: $116,676 to $208,350
- 35%: $208,351 to $235,350
- 39.6%: over $235,350
These thresholds were roughly half the joint amounts, which often left couples who filed separately paying more total tax than they would have jointly.3Internal Revenue Service. 2017 Instruction 1040 Tax Tables
Standard Deductions and Personal Exemptions
Gross income first got reduced by the standard deduction (or itemized deductions) and by personal exemptions to reach the taxable income the brackets acted on. For 2017, the standard deductions were:
- Single or married filing separately: $6,350
- Married filing jointly: $12,700
- Head of household: $9,350
Filers who were 65 or older, or blind, received an additional $1,250, or $1,550 if unmarried and not a surviving spouse.2Internal Revenue Service. Revenue Procedure 2016-55
The personal exemption did the other heavy lifting. Each taxpayer could subtract $4,050 for themselves, for a spouse on a joint return, and for each qualifying dependent. A married couple with two children removed $16,200 through exemptions alone, layered on top of the $12,700 standard deduction, so their first $28,900 of income was fully shielded.4Internal Revenue Service. Publication 501 – Exemptions, Standard Deduction, and Filing Information
Phaseouts That Raised the Real Rate on High Earners
Two provisions pushed effective rates above what the bracket tables suggested. Both used the same income thresholds, and both were repealed by TCJA.
Personal Exemption Phaseout
Once adjusted gross income crossed the threshold for a filing status, personal exemptions were reduced by 2% for every $2,500 of income above the line. The 2017 thresholds and full-elimination points were:
- Single: $261,500 (fully eliminated at $384,000)
- Married filing jointly: $313,800 (eliminated at $436,300)
- Head of household: $287,650 (eliminated at $410,150)
- Married filing separately: $156,900 (eliminated at $218,150)
A single filer earning $384,000 or more got no benefit from personal exemptions at all.4Internal Revenue Service. Publication 501 – Exemptions, Standard Deduction, and Filing Information
Pease Limitation on Itemized Deductions
Itemizers faced a parallel cut. Above the same AGI thresholds, total itemized deductions were reduced by 3% of every dollar over the line, capped at an 80% reduction. A joint filer earning $100,000 above the $313,800 threshold, for example, lost $3,000 of itemized deductions.2Internal Revenue Service. Revenue Procedure 2016-55
Long-Term Capital Gains Rates
Gains on assets held longer than a year were taxed at preferential rates tied directly to the ordinary income brackets:
- 0% for filers in the 10% or 15% ordinary brackets
- 15% for filers in the 25% through 35% brackets
- 20% for filers in the 39.6% bracket
An additional 3.8% net investment income tax applied to filers with modified AGI above $200,000 (single) or $250,000 (married filing jointly). That surtax has been in place since 2013.5Internal Revenue Service. Net Investment Income Tax Before TCJA, the capital gains cutoffs moved with the ordinary income brackets; TCJA split them into a separate schedule.6Internal Revenue Service. Topic No. 409, Capital Gains and Losses
Alternative Minimum Tax
The AMT ran as a parallel calculation. You figured your liability under both the regular rules and the AMT and paid whichever was higher. Two rates applied: 26% on the first slice of AMT income above the exemption and 28% on the rest. The 2017 exemption amounts were:
- Single or head of household: $54,300
- Married filing jointly: $84,500
- Married filing separately: $42,250
Above the exemption, filers recalculated after adding back deductions the AMT disallowed, including state and local taxes, miscellaneous itemized deductions, and some incentive stock option gains.2Internal Revenue Service. Revenue Procedure 2016-55
Child Tax Credit
The pre-TCJA child tax credit was $1,000 per qualifying child under age 17. It began phasing out at $75,000 of AGI for singles and $110,000 for joint filers, dropping by $50 for every $1,000 above the threshold. The refundable additional child tax credit was capped at $1,000 per child and only kicked in once earned income exceeded $3,000.7Congress.gov. The Child Tax Credit: How It Works and Who Receives It
Why the Pre-TCJA Brackets No Longer Apply
Most TCJA individual provisions were originally scheduled to expire after December 31, 2025. Had Congress let them lapse, the 2026 tax year would have reverted to the 10%-through-39.6% structure, adjusted for inflation.1Congress.gov. Expiring Provisions in the Tax Cuts and Jobs Act (TCJA, P.L. 115-97)
That reversion didn’t happen. In 2025, Congress passed and the President signed the One Big Beautiful Bill Act, which made the TCJA rate structure permanent. The current seven brackets remain at 10%, 12%, 22%, 24%, 32%, 35%, and 37%, the personal exemption stays at zero, and the higher standard deduction stays in place. The pre-TCJA brackets now govern only returns from 2017 and earlier, whether you’re amending an old filing, resolving an IRS matter from those years, or comparing how your tax burden shifted after the 2018 overhaul.