Final answer:
The tax rate on net investment income can be as high as 35% for certain taxpayers.
Step-by-step explanation:
The tax rate on net investment income varies depending on factors such as income level, marital status, and family size. For certain taxpayers, the tax on net investment income can be as high as 35%.
For example, in the United States, the marginal tax rates for a single taxpayer range from 10% to 35%, depending on income. However, it is important to note that tax rates can change over time due to legislative changes.