A large first-year depreciation deduction can look like an immediate tax win when you invest in California rental property. Still, the number on your depreciation schedule does not automatically equal the amount you can subtract from your current tax bill.
For qualifying taxpayers who actively participate in a rental real estate activity, federal tax rules generally allow up to $25,000 of rental losses to offset nonpassive income, subject to income-based limitations. Your federal return, California return, rental income, other income and passive activity status all affect the value you actually receive.
How accelerated depreciation works here
For California investors, cost segregation for California rental property can accelerate depreciation by identifying qualifying components that fit shorter federal recovery periods. The IRS explains the applicable depreciation rules and special depreciation allowance in Publication 946. California also does not conform to federal bonus depreciation under IRC Sec. 168(k), so your California depreciation schedule will differ from the federal one.
Consider a California investor who acquires a residential rental property for $2,400,000, with $600,000 allocated to land, leaving a depreciable building basis of $1,800,000. The investor separately purchases $80,000 of furniture, fixtures and equipment. The property is placed in service in January. Without a cost segregation study, the building is depreciated over 27.5 years and the first-year deduction under the mid-month convention is $62,730; the separately purchased FF&E receives 100% bonus depreciation of $80,000 whether or not a study is performed, for a total of $142,730.
With a study, $216,000 is reclassified to five-year personal property and $180,000 to 15-year land improvements, giving $396,000 of accelerated basis eligible for 100% bonus depreciation. The remaining $1,404,000 stays on the 27.5-year schedule and produces $48,929 in year one. Adding the $80,000 of FF&E, the first-year deduction is $524,929. The study’s incremental contribution is $382,199, which at a 37% marginal federal rate defers roughly $141,414 of tax.
Passive activity limits
These deductions are not automatically usable. Under IRC Sec. 469, rental real estate is generally a passive activity and passive losses offset only passive income; unused losses are suspended and carried forward until the taxpayer has passive income or disposes of the activity in a fully taxable transaction. A taxpayer who qualifies as a real estate professional under Sec. 469(c)(7) and materially participates may treat the losses as non-passive. Separately, a rental with an average guest stay of seven days or less is not a rental activity under Reg. Sec. 1.469-1T(e)(3)(ii)(A), so material participation alone can make the losses non-passive without real estate professional status.
California does not conform to IRC Sec. 469(c)(7). For California purposes, all rental activities remain passive activities regardless of real estate professional status and a Sec. 469(c)(7) election is inapplicable for California personal income or franchise tax.
Why material participation matters
Material participation can change the federal analysis because the IRS uses tests to determine whether you materially participate in an activity. One test requires more than 500 hours, while other tests compare your participation with that of others involved. You need records supporting qualifying work when your tax position depends on participation.
When real estate professional status matters
Real estate professional status provides another route through federal passive activity rules, but the requirements are demanding. You generally need more than 750 hours of services in real property trades or businesses in which you materially participate and more than half of your personal services must be performed in those businesses. Meeting 750 hours alone does not make rental losses nonpassive.
Each rental real estate interest is generally treated as a separate activity unless you make an election to group interests. That choice can affect how participation is measured.
Depreciation recapture
Accelerated depreciation is a deferral, not forgiveness. On a taxable sale, depreciation claimed on the five- and 15-year property a study reclassifies is recaptured under IRC Sec. 1245 as ordinary income to the extent of depreciation taken, potentially at rates up to 37%, rather than the 25% maximum applying to unrecaptured Sec. 1250 gain on the building itself. A study therefore shifts part of future gain from Sec. 1250 to Sec. 1245 treatment. The net benefit depends on the time value of the deferral and the expected holding period and is generally weaker for property expected to be sold within a few years.
Current law
The One Big Beautiful Bill Act (P.L. 119-21), signed July 4, 2025, made the 100% first-year bonus depreciation rate under IRC Sec. 168(k) permanent for qualifying property acquired and placed in service on or after January 20, 2025. Before that change, the rate was phasing down on a fixed schedule of 80%, 60%, 40%, 20% and then 0%. Property acquired before January 20, 2025 remains subject to the phase-down percentage in effect at the time of acquisition.
