Next Level Real Estate Investing · Part 7 of 8
Investor Education · 5 min read
The Deduction California Won't Give You — Yet
A client sends me the cost segregation study on a $750,000 rental. The engineer has pulled roughly 18% of the building into 5-, 7-, and 15-year property — appliances, flooring, fixtures, site improvements. With 100% bonus depreciation back and permanent, the federal first-year deduction lands near $119,000. At a 37% bracket, that's about $43,900 in his pocket in April.
Then he asks what it does for his California return.
About $21,000 in deductions. Maybe $2,000 in state tax savings.
Same property. Same study. Same year. He didn't do anything wrong, and nobody misled him. California just doesn't play by the federal rules on this one, and almost nobody explains it until the return is already being prepared.
Why doesn't California allow bonus depreciation?
Because it never has. California has not conformed to IRC §168(k) — not under the 2017 tax act, not under the 2025 law that made 100% bonus permanent. For individual taxpayers the disallowance sits in Revenue & Taxation Code §17024.5, and the Franchise Tax Board has been consistent about it for two decades. This isn't a new development or something Sacramento just did to you. It's the longest-standing tax split between California and the federal government that most investors have never heard of.
Your CPA handles it with an add-back. The bonus amount comes off the state return, and California depreciates those assets on its own schedule using FTB Form 3885A. Publication 1001 is the FTB's own list of these differences, and depreciation is on it.
Does that mean cost segregation is pointless in California?
No — and this is where most people overcorrect. California disallows the bonus. It does not disallow the study.
The whole point of a cost segregation study is reclassification: moving components out of the 27.5-year bucket and into 5-, 7-, and 15-year classes. California honors those class lives. So your state deductions still run substantially faster than straight-line — they're just spread across roughly years one through sixteen instead of landing all at once.
Two things follow from that. First, the state benefit is deferred, not destroyed. You eventually deduct the same dollars. Second, the federal side — the big number, the one that actually moves your April cash — is completely unaffected. On the property above, $43,900 in federal savings is real money that shows up now. The California piece is a rounding difference by comparison.
If someone tells you cost segregation doesn't work in California, they're wrong. If someone quotes you a first-year number without mentioning the state add-back, they're not wrong, but they're not finished either.
Can Section 179 get around it?
Not meaningfully. California caps §179 expensing at $25,000 with a phase-out starting at $200,000 of qualifying purchases — a fraction of the federal limits. That door is nailed shut from the same side.
What does this actually cost you in practice?
Two things, and neither is the tax dollars.
You now own two depreciation schedules for the life of the property. Because California didn't allow the bonus, your California basis in every reclassified component stays higher than your federal basis, starting in year one and continuing until disposition. The two only reconcile at sale, through recapture. This has to be tracked for as long as you own the property — through refinances, through a change of preparer, through software migrations. My practical advice: ask your CPA directly whether the California schedule is being maintained separately or whether the software is quietly mirroring the federal numbers. Ask before there's a problem, not after.
Your expectations need to be set at two levels. If you built a purchase decision on a first-year tax benefit and you're a California taxpayer, you should be looking at the federal figure and the state figure side by side before you write the offer — not in March.
Does the material participation work still matter for California?
Yes, and this is the part worth ending on. California conforms to the passive activity loss rules of §469. The hours you log, the documentation you keep, the operating decisions you make yourself rather than handing to a manager — all of that carries the same weight on FTB Form 3801 as it does federally. If you've qualified your short-term rental as non-passive, California recognizes it.
That's the important distinction. California changed the timing of your deduction. It did not disqualify your structure. The work you did to earn non-passive treatment wasn't wasted at the state line — it's still doing its job, just against a smaller first-year number.
Which raises a question I'd rather you ask before you buy than after: are you going to be a California taxpayer for the next sixteen years? Because that's how long it takes to collect the state portion — and if you're planning to leave, the answer changes the sequence entirely. That's the next post.
I'm a broker, not a CPA. Nothing here is tax advice for your situation, and the numbers above are illustrations, not a quote on your property. Take the study and this article to a tax professional who works with real estate — and if you don't have one, call me and I'll point you at someone who does.