The range of taxable income that is taxable at a certain rate. Currently, there are six marginal tax brackets: 10 percent, 15 percent, 27 percent, 30 percent, 35 percent, and 38.6 percent.

The range of taxable income that is taxable at a certain rate. Currently, there are five marginal tax brackets: 15 percent, 28 percent, 31 percent, 36 percent, and 39.6 percent.

The rate of income tax applied to your next dollar earned.

The range of taxable income that is taxable at a certain rate. Currently, there are six marginal tax brackets: 10 percent, 15 percent, 25 percent, 28 percent, 33 percent, and 35 percent.

The income tax rate applied to your next dollar earned is your Marginal Tax Bracket.

The amount of income tax that an investor would pay on the next dollar of income. Generally, the marginal rate is higher than the average rate because of the progressive tax rate structure.