Bonus depreciation

Lets you deduct a percentage of certain property's basis in the year placed in service.

Bonus % set by Congress: 100% in 2017-2022, 80% in 2023, 60% in 2024, 40% in 2025, 20% in 2026, 0% in 2027 unless extended. Applies to assets with recovery periods of 20 years or less — which means cost-seg's 5/7/15-year buckets, NOT the 27.5-year residential building itself.