Bonus depreciation is a tax provision that allows businesses to accelerate depreciation deductions on qualified assets. The rules have changed for assets acquired and put into use after September 27, 2017. Previously, 50% bonus depreciation was allowed for new assets purchased before September 28, 2017. After the Tax Cuts and Jobs Act of 2017 passed, businesses can claim a 100% bonus "expensing" for both new and used assets, allowing them to deduct the full cost in the first year. This benefit phases down over time, with the percentage decreasing to 80% in 2023, 60% in 2024, 40% in 2025, and 20% in 2026. After 2026, bonus depreciation will no longer be available. Additionally, certain productions, such as film, television, and live performances, as well as fruit and nut trees planted or grafted after September 27, 2017, are also eligible for 100% expensing. It's important to note that this bonus depreciation is separate from the expensing rules under Code Section 179. Businesses can opt out of the new bonus depreciation rules and use the prior 50% bonus depreciation rules for the first tax year ending after September 27, 2017, if they choose to do so.