U.S. Standard Deduction History

Josh · Last updated: July 19, 2026

Last verified: July 19, 2026 against IRS Rev. Proc. 2025-32 + OBBBA tax-year guidance + historical IRS publications

Reviewed by Josh for financial modeling and data. See more by Josh.

Single-filer standard deduction from the 1944 introduction to the 2026 inflation-adjusted amount of $16,100, with every major legislative change annotated.

Sources: IRS Publication 17 historical tables, Internal Revenue Code legislative history, Tax Foundation, Joint Committee on Taxation.

Single-filer standard deduction (nominal USD), 1944-2026

Swipe horizontally to explore the full timeline. Tap the chart to read an exact value.

Explore the chart with a pointer or the arrow keys to read the exact value for any year. Select a year chip at the top to see the event that moved the line.

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$500

1944 origin

Introduced by the Individual Income Tax Act of 1944. Roughly $9,500 in 2026 dollars.

TCJA 2018 jump

Single went from $6,350 to $12,000; MFJ from $12,700 to $24,000. Personal exemptions eliminated.

$16,100

2026 single

$32,200 MFJ, $24,150 HoH. OBBBA made the structure permanent.

The major changes

The standard deduction has shifted with each major tax reform. Below are the legislative milestones that drove the line on the chart above.

1944

Individual Income Tax Act of 1944 - the standard deduction is born

The 1944 Act introduced the standard deduction at $500 single, $1,000 MFJ. Before 1944, taxpayers either itemized or took an "optional standard deduction" of 10% of income capped at $500. The 1944 Act simplified the rule to a fixed dollar amount, partly to make withholding feasible (which the same Act introduced) and partly to simplify filing for the millions of new wage earners pulled into the income tax during WWII.

1948

Income splitting boosts the joint deduction

The Revenue Act of 1948 created the joint return with income splitting, effectively doubling the MFJ deduction to $1,000 (still $500 single). The "marriage penalty" / "marriage bonus" structure that has shaped tax filing decisions since dates from this Act.

1969

Tax Reform Act of 1969 - $1,500 and the AMT

TRA69 increased the standard deduction to $1,500 single, $2,000 MFJ and tied it to a percentage of income (15% up to a cap) rather than a fixed dollar amount. The same Act introduced the Alternative Minimum Tax to prevent high earners from using deductions to drive their tax liability to zero.

1977

Renaming to "zero bracket amount"

The Tax Reduction and Simplification Act of 1977 absorbed the standard deduction into the tax tables themselves under the name "zero bracket amount" (ZBA). Functionally identical, but presented to taxpayers differently. The 1977 single amount was $2,200.

1985

ERTA inflation indexing begins

The Economic Recovery Tax Act of 1981 required brackets and the standard deduction to be indexed to inflation starting in 1985. Before ERTA, the deduction was static in nominal dollars and "bracket creep" silently raised effective tax rates as wages grew. The 1985 amount was $2,480, the first inflation-indexed single deduction.

1988

TRA86 phase-in complete

The Tax Reform Act of 1986 reorganized the deduction structure, increasing the single deduction from $2,540 in 1987 to $3,000 in 1988 and the MFJ deduction to $5,000. TRA86 also restored the "standard deduction" terminology, retiring the ZBA name. The 1988 deduction was the highest in real-dollar terms since 1944.

2018

TCJA roughly doubles the standard deduction

The Tax Cuts and Jobs Act of 2017 took effect in 2018 with the most consequential standard-deduction change since 1944. The single deduction jumped from $6,350 to $12,000, and MFJ went from $12,700 to $24,000. The trade-off: TCJA also eliminated personal exemptions ($4,050 each in 2017) and capped SALT deductions at $10,000. The net effect made itemizing significantly less common: the share of itemizers dropped from roughly 30% of returns in 2017 to about 11% in 2018 (IRS SOI).

2026

OBBBA permanence and the $16,100 2026 deduction

The One Big Beautiful Bill Act made the TCJA-era structure permanent and increased the 2025 amounts. The IRS then applied its 2026 inflation adjustment. The 2026 standard deduction is $16,100 single, $32,200 MFJ, and $24,150 HoH.

Things you might not know

The standard deduction is younger than the income tax. The federal income tax began in 1913. The standard deduction wasn't introduced until 1944, three decades later.
TCJA didn't simply double the deduction. It also eliminated personal exemptions ($4,050 per person in 2017), so families of four saw a much smaller net change than the headline doubling implied.
The itemizing share collapsed in 2018. About 30% of returns itemized in 2017; only about 11% have itemized since TCJA took effect (IRS SOI). The doubled standard deduction plus the SALT cap pushed most middle-income filers off itemizing entirely.
Inflation indexation switched in 2018. ERTA established annual inflation adjustment using regular CPI. TCJA switched to chained CPI, which grows about 0.25 percentage points slower per year. That gap compounds over time and is why the post-TCJA deduction has grown a little slower than pre-TCJA growth would have produced.
Some states track the federal deduction; many don't. About 21 states use the federal standard deduction directly. The rest use their own deduction (often much smaller) or eliminate the standard deduction entirely. State tax filing complexity often exceeds federal complexity for this reason.

Standard deduction by year (single filer)

The single-filer standard deduction behind the chart, from 1944 to 2026. Married filing jointly is roughly double in every year. The 2018 jump reflects the Tax Cuts and Jobs Act nearly doubling the deduction.

Standard deduction by year (single filer)
Year	Standard deduction (single)	What changed that year
1944	$500	Individual Income Tax Act of 1944 - standard deduction introduced
1964	$1,000
1969	$1,500	Tax Reform Act of 1969 - increased threshold
1971	$1,750
1972	$2,000
1975	$1,900
1977	$2,200	Tax Reduction and Simplification Act renames "zero bracket amount"
1979	$2,300
1985	$2,480	ERTA inflation indexing begins
1987	$2,540
1988	$3,000	Tax Reform Act of 1986 phase-in completes
1990	$3,250
1995	$3,900
2000	$4,400
2005	$5,000
2010	$5,700
2015	$6,300
2017	$6,350
2018	$12,000	TCJA roughly doubles the standard deduction
2020	$12,400
2022	$12,950
2024	$14,600
2025	$15,750	One Big Beautiful Bill Act makes the TCJA structure permanent and raises the deduction
2026	$16,100	IRS applies the first post-OBBBA inflation adjustment

Full series shown. Scroll within the table to see every year.

Frequently Asked Questions

What is the 2026 standard deduction?

For 2026, the federal standard deduction is $16,100 for single filers, $32,200 for married filing jointly, and $24,150 for head of household. OBBBA made the TCJA-era structure permanent. The 2026 amounts are inflation-adjusted from the final 2025 amounts of $15,750 / $31,500 / $23,625.

When did the standard deduction start being inflation-indexed?

The Economic Recovery Tax Act of 1981 required the standard deduction (and tax brackets) to be inflation-indexed beginning in 1985. Before ERTA, the deduction was static in nominal dollars; inflation-driven 'bracket creep' silently raised effective tax rates as wages rose. ERTA used regular CPI; TCJA in 2017 switched the indexation to chained CPI, which typically grows about 0.25 percentage points slower per year.

How much did TCJA actually change the standard deduction?

TCJA roughly doubled the standard deduction starting in 2018: single went from $6,350 to $12,000, and MFJ went from $12,700 to $24,000. But the net change for taxpayers was less dramatic because TCJA also eliminated personal exemptions ($4,050 per person in 2017). For a married couple with two children, 2017 deductions plus exemptions were $12,700 + $16,200 = $28,900; 2018 was just the $24,000 standard deduction. So the headline 'doubling' was partially offset for larger families.

What share of taxpayers itemize vs. take the standard deduction?

Per IRS Statistics of Income, roughly 30% of returns itemized in 2017 (the year before TCJA). After TCJA's doubled standard deduction took effect in 2018, the itemizing share dropped to about 11% and has stayed near that level since. Most itemizers today are high-income households with large mortgage interest, state and local tax (capped at $10K), and charitable contribution deductions.

What's the difference between the standard deduction and the personal exemption?

The standard deduction reduces taxable income by an amount based primarily on filing status. Personal exemptions were a separate per-person reduction before TCJA; the 2017 amount was $4,050 per taxpayer and dependent. TCJA suspended them beginning in 2018, and OBBBA permanently set the personal-exemption deduction at zero under current law.

Should I take the standard deduction or itemize?

Generally, compare your allowed itemized deductions with your standard deduction. For 2026, the ordinary SALT cap is $40,400 ($20,200 if married filing separately) before the income-based phase-down that begins above $505,000 of MAGI. The cap cannot phase below $10,000 ($5,000 MFS). Mortgage-interest, charitable-contribution, and medical-expense rules have separate limits, so use the amounts allowed on your return when making the comparison.

To check today's standard deduction against your bracket, use our tax bracket calculator. For the current 2026 bracket schedule, see 2026 federal tax brackets. For sources and update cadence, see our methodology.