The purpose of the Paying a Fair Share Act of 2025 is to ensure that high-income earners contribute a fairer share of federal taxes. This legislation aims to address concerns that wealthy individuals are not paying enough in taxes relative to their income, thereby promoting a more equitable tax system. The key provisions of this act introduce a new tax specifically for high-income taxpayers. A high-income taxpayer is defined as anyone earning over million in adjusted gross income, or $500,000 for married individuals filing separately.