The Revenue Act of 1940 temporarily and permanently increased individual income tax rates, temporarily and permanently increased corporate tax rates (top rate rose from 19% to 33%), and temporarily increased most excise tax rates to 30-50%.

The personal exemption fell from $2,500 to $2,000 (married couples).

Normal tax

A Normal Tax was levied on the net income

Net income

Net income is the residual income of a firm after adding total revenue and gains and subtracting all expenses and losses for the reporting period. Net income can be distributed among holders of common stock as a dividend or held by the firm as an addition to retained earnings...

of corporations as shown in the following table.

Revenue Act of 1940 Tax on Corporations
Net Income (dollars)	Rate (percent)
0	19
25,000	33

Tax on individuals

A normal tax and a surtax were levied against the net income of individuals as shown in the following table.

Revenue Act of 1940 Normal Tax and Surtax on Individuals
Net Income (dollars)	Normal Rate (percent)	Surtax Rate (percent)	Combined Rate (percent)
0	4	0	4
4,000	4	4	8
6,000	4	6	10
8,000	4	8	12
10,000	4	10	14
12,000	4	12	16
14,000	4	15	19
16,000	4	18	22
18,000	4	21	25
20,000	4	24	28
22,000	4	27	31
26,000	4	30	34
32,000	4	33	37
38,000	4	36	40
44,000	4	40	44
50,000	4	44	48
60,000	4	47	51
70,000	4	50	54
80,000	4	53	57
90,000	4	56	60
100,000	4	58	62
150,000	4	60	64
200,000	4	62	66
250,000	4	64	68
300,000	4	66	70
400,000	4	68	72
500,000	4	70	74
750,000	4	72	76
1,000,000	4	73	77
2,000,000	4	74	78
5,000,000	4	75	79

• Exemption of $800 for single filers and $2,000 for married couples and heads of family. A $400 exemption for each dependent under 18.