Long term capital gains tax is 15%. Interest on simpler accounts are taxed at a higher income rate. This is a very loose interpretation of what you're asking f

Long term capital gains tax is 15%. Interest on simpler accounts are taxed at a higher income rate. This is a very loose interpretation of what you're asking for, but with lots of side effects. Like people who trade their labor for income are taxed at a relatively high rate, while people who sit back and collect rent on capital "risking their money" are taxed at a fairly low rate. At high concentrations of capital, the "risk" is not so much a risk. (esp when the full force of the gov't is backing many aspects of the risk...)