Bonus Depreciation 2024 15 Year Property. A cost segregation study identifies building components that can be depreciated over a shorter time period — typically 5, 7 or 15 years, depending on the type of asset,. For assets placed in service during the 2023 calendar year, the bonus depreciation decreases to 80%.

It allows you to deduct 60% of the cost of an asset purchased in 2024, as opposed to depreciating its cost over the useful life. Bonus depreciation deduction for 2023 and 2024.