Cost Segregation in California: 2026 Tax Rules

Is cost segregation still worth it in California?

It can be, even though California does not follow the federal bonus-depreciation result. A valid study can still move components from 27.5- or 39-year building property into shorter recovery classes for California. The difference is timing: eligible federal components may receive 100% bonus depreciation under current federal law, while California generally computes regular state depreciation and requires a federal-to-state adjustment.

The decision should be based on two schedules, not one. Model the federal deduction, California depreciation, basis and at-risk limits, passive-loss treatment, expected holding period, state and federal sale consequences, study fee, and return-implementation cost. A large federal deduction is not proof that the same amount reduces California taxable income—or that either deduction is currently usable.

Book a Return Review Call if you want AE to test a proposed study against both returns before you order it.

Federal and California treatment are separate calculations

Decision point	Federal return	California return
Asset classification	A supportable study may identify 5-, 7-, and 15-year property	Classification can still shorten recovery, subject to California law
Bonus depreciation	Current federal law generally permits 100% bonus for qualifying property acquired and placed in service after January 19, 2025	Current FTB instructions identify IRC Section 168(k) additional depreciation as a federal-state difference
Section 179	2026 maximum is $2,560,000, reduced when qualifying investment exceeds $4,090,000, before other limits	Current California materials use a $25,000 maximum and a $200,000 investment phaseout
Depreciation reporting	Form 4562 and the owning return	California depreciation form or adjustment schedule appropriate to the taxpayer and activity
Passive losses	Federal basis, at-risk, passive, and other loss limits apply	California amounts can differ and may require separate FTB 3801 tracking
Sale-year basis	Federal adjusted basis and character	Separate California adjusted basis and gain calculation

Federal eligibility still depends on acquisition date, placed-in-service date, property type, business use, related-party rules, and any election out. California conformity should be checked against the instructions for the filing year; do not copy a prior-year adjustment mechanically.

Worked example: one study, two depreciation schedules

Assume an investor acquires a California apartment building for $2.3 million, supports a $520,000 land allocation, and has $1.78 million of depreciable basis. A study identifies $267,000 of 5-year property, $178,000 of 15-year land improvements, and $1.335 million of remaining residential building basis.

If the short-life property qualifies for 100% federal bonus depreciation, the federal return may deduct the $445,000 short-life basis immediately, plus the allowed current-year building depreciation. California generally removes the federal bonus effect and computes state depreciation for the short-life components over their applicable recovery periods. Using simplified full-year percentages only for screening, the 5-year and 15-year components might produce roughly $62,300 of California depreciation before the building amount, rather than a $445,000 immediate deduction.

That difference is a timing difference, not automatically a lost deduction. But it changes current cash tax, passive-loss carryforwards, adjusted basis, and the sale-year calculation. The illustration is not a return result: conventions, service date, entity, prior depreciation, elections, business use, and California rules can materially change it.

California filing checklist after the study

Reconcile basis. Tie purchase price, land, acquisition costs, improvements, and prior depreciation to both federal and California ledgers.
Confirm the service date and federal bonus rule. Acquisition and placed-in-service timing can control the federal percentage; California treatment is computed separately.
Build two fixed-asset schedules. Retain each asset's description, basis, recovery period, convention, accumulated depreciation, and federal-state difference.
Choose the proper California form. Individuals commonly use FTB 3885A when depreciation differs, with Schedule CA reporting; entity forms and reconciliation paths differ for partnerships, LLCs, S corporations, C corporations, estates, and trusts.
Run loss limitations in order. Review basis, at-risk, passive-activity, and other applicable limits using the state amounts. Passive activities may feed through FTB 3801.
Update owners and states. Partnerships and S corporations must preserve the entity-level state schedule so owners receive the correct California information.
Preserve the sale bridge. Carry both adjusted-basis schedules forward until the property and shorter-life components are disposed of.

When the California return makes the study less compelling

A study may still be a poor purchase when the federal loss will be suspended, the California benefit arrives too slowly to justify the fee, records cannot support the allocation, the property will be sold soon, or the owner is comparing a gross deduction with no sale or recapture model. It can be stronger when the federal deduction is usable now, the California shorter-life depreciation has meaningful present value, the property has a longer hold, and one team will maintain both schedules.

Do not use a fixed “reclassification percentage” as the answer. Property condition, renovations, specialty systems, site improvements, land, personal property, and available records drive the study. Use the cost segregation calculator only as a screening range, then reconcile the actual property facts.

Passive losses, LLC charges, and nonresident owners

Cost segregation does not override loss limitations. Federal and California depreciation differences can create different current losses and different suspended-loss carryforwards. A rental investor should not assume the federal Form 8582 amount equals the California amount; current FTB 3885A instructions direct passive depreciation adjustments into the California passive-activity computation.

A California LLC may owe the $800 annual tax even when the property reports a tax loss. The additional LLC fee is based on total California income and begins only when the applicable statutory threshold is reached; it is not automatically owed by every loss property. Entity classification, exemptions, short-year rules, and current-year instructions matter.

California real estate can also create California-source income and filing obligations for nonresident owners. Withholding rules depend on the payor, recipient, entity, payment, waiver or reduction certificate, and other exceptions. A Wyoming or Nevada formation does not by itself remove California obligations when the entity owns or operates California property.

Documents to gather before filing

Cost segregation report, asset detail, methodology, photographs, and cost-reconciliation workpapers
Closing statement, appraisal, land support, construction invoices, improvement records, and placed-in-service evidence
Federal and California depreciation schedules from every year of ownership
Prior Forms 4562, Schedule E or Form 8825, FTB depreciation forms, Schedule CA adjustments, and FTB 3801 workpapers
Entity returns and K-1s, ownership and basis schedules, personal-use records, and state apportionment or source data
Expected hold period, planned improvements, refinancing documents, and sale assumptions for the exit model

Common California filing failures

Taking the federal bonus amount on the California return without the required adjustment
Using the federal Section 179 ceiling or eligible-property rules as California law
Keeping one combined fixed-asset schedule and losing the state basis difference
Sending a federal passive-loss carryforward to California without recomputing it
Ignoring entity-level California schedules when issuing K-1 information
Claiming a state tax benefit from a suspended loss as though it reduced current cash tax
Reconstructing California basis only when the property is sold

Primary sources for the return file

2025 FTB 3885A instructions (latest final individual depreciation-adjustment instructions available during this review)
FTB Publication 984 federal-state business-expense comparison
California form and instruction search for the taxpayer's entity and filing year
IRS Publication 946 for federal depreciation and 2026 Section 179 limits
IRS Cost Segregation Audit Techniques Guide for study quality and documentation

Frequently Asked Questions

Does California allow bonus depreciation?

California's current instructions identify federal additional depreciation under IRC Section 168(k) as a federal-state difference. The California return generally removes the federal bonus effect and computes state depreciation under California rules. Use the current-year FTB instructions because conformity can change.

What is California's Section 179 limit?

Current California materials use a $25,000 maximum and a phaseout beginning when qualifying property exceeds $200,000. The 2026 federal maximum is $2,560,000 with a $4,090,000 investment limit. Eligibility and business-income limits still apply, so the maximum is not an automatic deduction.

Is a cost segregation study still worth it in California?

It can be. California may still recognize shorter recovery periods for correctly classified assets even when it does not allow the federal bonus deduction. Model the federal and California schedules separately, then test loss usability, study cost, expected holding period, and sale-year basis before deciding.

Do I owe the LLC fee on a property losing money?

A California LLC may owe the $800 annual tax even when the property has a tax loss. The additional LLC fee is based on total California income and begins only when the applicable threshold is reached; it is not automatically owed by every loss property. Confirm entity status, exemptions, and the current-year thresholds.

Can I avoid California tax with a Wyoming LLC?

Forming in another state generally does not remove California filing and tax obligations when the entity owns and operates California real estate. The exact annual tax, LLC fee, withholding, and owner-return obligations depend on entity classification, activity, and California-source income.