Based on the capital gains tax brackets listed earlier, you'll pay a 15% rate, so the gain will add $300 to your tax bill for 2020. Sanders’ proposal would tax capital gains at the same rate as ordinary income for taxpayers with household income of $250,000 and above, which is where the current Net Investment Income Tax (NIIT) phases in. Importantly, Sanders’ plan would raise marginal tax rates from current law, creating four new tax brackets: 40 percent on income between $250,000 and $500,000, 45 percent on income between $500,000 and $2 million, 50 percent on income between $2 million and $10 million, and 52