War Revenue Act of 1917

The United States War Revenue Act of 1917 greatly increased federal income tax rates while simultaneously lowering exemptions.

The 2% bracket had previously applied to income below $20,000. That amount was lowered to $2,000. The top bracket (on income above $2 million) was raised from 15% to 67%.

The act was applicable to incomes for 1917.

War Income Tax for Individuals

In addition to the Normal Tax and an Additional Tax levied against the net income of individuals in the Revenue Act of 1916 a "like normal" tax and a "like additional" tax were levied against the net income of individuals as shown in the following table.

Revenue Act of 1917 War Income Tax on Individuals 40 Stat. 300
	Tax Rates from 1916 Act		Tax Rates from 1917 Act
Net Income (dollars)	Normal Rate (percent)	Additional Rate (percent)	Like Normal Rate (percent)	Like Additional Rate (percent)	Combined Rate (percent)
0	2	0	2	0	4
5,000	2	0	2	1	5
7,500	2	0	2	2	6
10,000	2	0	2	3	7
12,500	2	0	2	4	8
15,000	2	0	2	5	9
20,000	2	1	2	7	12
40,000	2	2	2	10	16
60,000	2	3	2	14	21
80,000	2	4	2	18	26
100,000	2	5	2	22	31
150,000	2	6	2	25	35
200,000	2	7	2	30	41
250,000	2	8	2	34	46
300,000	2	9	2	37	50
500,000	2	10	2	40	54
750,000	2	10	2	45	59
1,000,000	2	11	2	50	65
1,500,000	2	12	2	50	66
2,000,000	2	13	2	50	67

• Exemption of $3,000 for single filers and $4,000 for married couples or heads of household.

Inflation-adjusted numbers

Corrected for inflation by CPI:

1917 dollars	2005 dollars
$2,000	$30,516
$20,000	$305,156
$2,000,000	$30,515,625