The Tax Cuts and Jobs Act (TCJA) of 2017 can be seen as a major overhaul of the U.S. tax code, signed by President Donald Trump. It lowered the corporate tax rate from 35% to 21% in addition to reducing individual income tax rates across most brackets. The Tax Cuts and Jobs Act (TCJA) lowered the top marginal rate from 39.6% to 37%. It also raised the thresholds for higher tax brackets.

Significance:

  • Trump’s Tax Cuts and Jobs Act (TCJA) lowered the Top Marginal Tax Rate from 39.6% to 37% for Income above $600,000 ($763,000 in 2025)
  • TCJA eliminated the Affordable Care Act’s Individual Mandates tax penalty
  • TCJA kept the bottom bracket the same at 10%, lowered the rest of the brackets, kept the 35% bracket the same, and lowered the Top Marginal Tax Bracket to 37%
  • Major reduction to the Corporate tax rate from 35% to 21%
  • Moved indexes from CPI to Chained CPI, in essence a slow tax increase allowing Bracket Creep over time
  • Limited State and Local Tax (SALT) deductions to $10,000 a move largely impacting high income states
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Tax Project Institute

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