How to Calculate Marginal Revenue. The successful operation of a small business requires owners and management to understand a few basic economic principles. Defined as the additional amount of ...

Your marginal tax rate is the highest tax rate you will pay. Use our calculator to determine your marginal tax rate for the 2024 tax year.

To calculate your marginal tax rate, apply the percentage of tax charged to the amount of income in each bracket according to your filing status and add up the totals.

To calculate the marginal tax rate on the investment, you'll need to figure out the additional tax on the new income. In this example, $500 will be taxed at 15% and $500 at 25%.