One Big Beautiful Bill Enacts Major Permanent US Tax Changes

On July 4, 2025, President Trump signed the One Big Beautiful Bill Act (OBBBA) into law, making permanent several provisions of the 2017 Tax Cuts and Jobs Act and scaling back energy tax incentives from the Inflation Reduction Act of 2022. Key business tax changes include permanent 100% bonus depreciation for qualified property, immediate expensing of domestic research and experimental expenditures reversing prior amortization rules, and reinstatement of the EBITDA-based limitation on business interest deductibility. The Act also introduces a new immediate deduction for qualified production property, primarily benefiting domestic manufacturing and production facilities. These tax reforms, effective in various stages starting in 2025 and 2026, impact both U.S. and international taxpayers, including Canadian entities and individuals with U.S. ties, who must assess the implications of permanent corporate tax measures and increased estate and gift tax exemptions. The OBBBA aims to promote business investment, entrepreneurship, and economic growth while adjusting prior tax incentive structures. Additional international and individual tax reforms continue to be debated and implemented globally, with some countries proposing changes to tax deductions, refunds, and enforcement measures.