Under this change, the combined tax of husband and wife became twice the combined tax that would have applied if their combined taxable income (net income for years before 1954) were cut in half. To simplify the data presentation for these more recent years, only the lowest and highest tax rates for married persons filing jointly are shown. However, a second, lower set of rates was introduced, starting with 1948, for married couples filing jointly. Until 1948, a single set of tax rates applied to all taxpayers, regardless of marital or filing status, and married couples filing joint returns were taxed on the combined income of each spouse.
Included among these special treatments were alternative tax (1938-1986) and its variations for the earlier years, although all of these taxes were in some way tied to a structure for regular tax. At various times, these treatments have taken the form of special tax rates special definitions different asset holding periods ceilings on taxes and exclusions from income. In addition, data excludes the taxes associated with the preferential treatment of capital gains, starting with 1922 (although certain gains received preferential treatment as early as 1918). Excluded are the war excess profits tax (1917), victory tax (1942-1943), Social Security self-employment tax (starting with 1951), tax under the income averaging provisions (1964-1986) and under the farm income averaging provisions (starting with 1998), and the recapture taxes resulting from having to recompute and pay back certain tax credits in later years (starting with 1963), the maximum tax on earned income or on personal service income (1971-1981), the minimum tax on tax preferences (1970-1983), and the alternative minimum tax on tax preferences (starting with 1979).Īlso excluded are such other taxes as the tax on recipients of accumulation distributions of trusts (starting with 1954) and the special averaging tax or multiple recipient special averaging tax on recipients of lump-sum distributions from qualified retirement plans (starting with 1974). Tax rates exclude the effect of tax credits (which reduce the tax liability), except as noted, and several specific add-on or other taxes applicable to all or some tax years. Therefore, the rates exclude provisions unique to nonresident aliens. Department of Labor Consumer Price Index for Urban Consumers (CPS-U).Īs stated by the source, tax rates shown are for the regular income tax, i.e., for normal tax and surtax, applicable to U.S. Starting with 1985, tax bracket boundaries were indexed for inflation, using the U.S.
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