Income tax groupings given by the Internal Revenue Service (IRS) that decide that at what rate an individual, corporation's or trust, annual income will expose to federal income tax. Federal tax brackets are adjusted from time to time to explain for the effects of inflation over time.

Federal tax brackets are planned in order that individuals or legal entities are taxed at diverse rates depending on the quantity of annual income they get.

For individuals, the federal tax brackets are prearranged so that as an individual gains extra annual income, his or her income is taxed at a superior rate.