Cost segregation in California.

California is one of the highest-impact states for cost segregation, and one of the most misunderstood. Federal rules allow large first-year deductions, but California does not follow the same depreciation schedule. See Your California Tax Savings →

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California is one of the most valuable states for cost segregation, and one of the most misunderstood. The high property values generate some of the largest accelerated depreciation deductions in the country: a $1M rental property routinely produces $200K+ in reclassified assets at the federal level. But the state doesn’t follow the same rules, which changes the math in ways most investors don’t anticipate.

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However, California is different from most states. While federal tax law allows 100% bonus depreciation under the One Big Beautiful Bill Act, California does not conform to those rules. In practice, investors receive a large federal tax benefit immediately, while the California portion of the deduction is spread out over the standard MACRS recovery periods.

For most investors, especially those in the 37% federal bracket, this timing difference is still highly favorable. But understanding how the federal and state returns interact is essential before ordering a study.

Worked example (illustrative figures): a $1.2M Hollywood Hills Airbnb would generate ~$288,000 in accelerated deductions, roughly $106,000 in estimated federal tax savings.

Representative California savings: $50,000–$110,000

How Cost Segregation Works in California

At the federal level, cost segregation reclassifies portions of a property into 5, 7, and 15-year assets. With 100% bonus depreciation, those components can be deducted entirely in the first year.

California does not follow federal bonus depreciation rules. Instead, the state requires standard MACRS depreciation schedules. This creates a timing mismatch: you may see a significant federal tax benefit in Year 1, while your California tax benefit is realized gradually over 5–15 years.

For most investors with high federal tax exposure, the federal acceleration alone justifies the study. But the split matters: your CPA needs to maintain separate federal and state depreciation schedules, which most California CPAs already do. Example: $1.2M California Rental Property

• $1.2M Purchase price
• $288K Reclassified into shorter-life assets
• $106K Estimated federal tax savings (37% bracket) Spread CA state benefit over 5–15 years (not Year 1)

Federal benefit is immediate. California benefit is real but distributed over time due to state non-conformity with bonus depreciation. Cost segregation in California is most valuable for: - High-income W-2 earners using STR material participation rules to offset salary income - Real estate professionals who spend 750+ hours/year in real estate activities - Investors with multiple California properties looking to compound accelerated deductions

Most investors run a quick estimate before ordering. See your California numbers here.

What Investors in California Should Know California does not conform to bonus depreciation

Federal and state returns will differ. You get the full federal bonus deduction in Year 1, but the state deduction follows standard MACRS schedules. This is the single most important thing to understand about cost seg in California. Higher property values amplify deductions

A $1M property in LA produces ~$240K in accelerated depreciation at the federal level. Even a $500K Joshua Tree cabin generates ~$120K. The raw numbers are larger than in most other states simply because of property values. STR material participation is critical

For high-income California W-2 earners, the ability to treat STR losses as non-passive (via material participation) is the single biggest factor in whether cost segregation pays off. Without it, losses are limited to passive income only. Separate schedules required

Your CPA needs to maintain federal and California depreciation schedules independently. Most California tax professionals already do this, but confirm before filing. Hear from a real investor

This Airbnb investor ordered a cost segregation study and used the deductions on their next tax return.

Which cost segregation companies serve California?

Every firm below takes California properties; the first group is based in the state, the second works nationally and remotely. Pricing is shown as a tier, not a quote — a competitor’s fee is theirs to publish. Ours is on the pricing page.

Based in California

Two national firms keep California offices: Maven Cost Segregation (San Diego; HQ Michigan) and ICS Tax (Los Angeles and Laguna Hills).

National, remote-capable

One California-specific point when comparing: the state does not conform to federal bonus depreciation, so whichever firm you use, your CPA keeps a separate California MACRS schedule. A study’s value in California is the federal Year-1 deduction plus a slower state benefit — every provider’s report has to support both schedules. The full comparison walks the decision tree.

Multi-Property Investors and Form 3115 Lookback

A common California portfolio looks like a Santa Monica STR + a San Diego investment condo + a Lake Tahoe seasonal cabin. Properties acquired 2+ years ago without a cost segregation study qualify for Form 3115 lookback — the missed federal acceleration recaptures in a single tax year via §481(a). California decouples from federal bonus depreciation at the state level, but the federal §481(a) catch-up is unaffected. On a 3-property California portfolio, the catch-up federal deduction routinely runs $300K–$800K depending on basis. Multi-property study bundles run 5%–15% off per property depending on count. See bundle pricing →

Key Markets in California

Los Angeles, CA

High property values mean larger depreciation bases, translating into significant federal deductions. Hollywood Hills, Venice, and Silver Lake STRs carry heavy furnishing packages (designer furniture, smart home systems, pool areas), all of which fall into 5-year MACRS classes. The state-level benefit is more gradual due to California’s non-conformity, but the federal impact alone frequently exceeds $80K in Year 1. See Los Angeles breakdown →

San Diego, CA

Pacific Beach, Mission Beach, and North Park drive year-round STR demand supported by military relocations and tourism. San Diego properties tend to have extensive outdoor improvements (patios, landscaping, fencing) that fall into the 15-year MACRS class, adding to the reclassified amount beyond interior FF&E. Entry points are lower than LA, making the study-cost-to-savings ratio especially strong. See San Diego breakdown →

San Francisco, CA

The highest absolute Year-1 federal savings of any non-multifamily residential market in the country: $90K–$160K is routine on a single Pacific Heights, Russian Hill, or Marina property. SF’s STR ordinance pushed the entire investor market to mid-term rentals (60–180 day stays), which is where tech-executive, healthcare-contract, and finance-rotation tenants drive corporate-housing demand at $9K–$14K/month. California’s non-conformity to federal bonus depreciation is the math you have to model honestly, and we walk through both layers. See San Francisco breakdown →

Property Types That Benefit Most in California Short-term rentals LA, San Diego, Palm Springs, Joshua Tree, Lake Tahoe

The dominant use case. High property values and heavy furnishing create the largest dollar-amount deductions of any state. Material participation status is the key gating factor. Multifamily LA, Bay Area, San Diego

California’s multifamily market is massive. Older rent-controlled buildings often have significant deferred maintenance and separable components that create strong reclassification opportunities. Commercial and mixed-use Bay Area, LA, Sacramento

Office, retail, and mixed-use properties depreciate over 39 years by default. Tenant improvements, specialized HVAC, and parking structures all reclassify into shorter classes. Condos LA, San Diego, San Francisco

Interior-only depreciation limits the total, but at California price points ($500K-$1M+ for a condo), the interior components still produce meaningful acceleration.

ADUs / Accessory Dwelling Units: Statewide California, especially LA / Bay Area / San Diego. California’s ADU streamlining (SB 9, SB 10, SB 1211) has driven hundreds of thousands of accessory dwelling unit projects since 2020. Newly-built or converted ADUs generally produce some of the highest reclassification rates we see: modular construction with documented per-component costs lands 30%+ of basis in 5- and 15-year MACRS. Federal acceleration is unaffected by California’s bonus depreciation decoupling.

Have one of these property types? See what your California property would save.

When Cost Segregation Typically Makes Sense in California It generally makes sense when:

• Purchase price above ~$400K (given California’s price levels, nearly every investment property qualifies)

• You can use the losses, especially if you’re a W-2 earner who materially participates in your STR

• You have a CPA who can maintain separate federal and state depreciation schedules (most California CPAs already do this)

• You plan to hold for 5+ years or use a 1031 exchange at sale It may not make sense if:

• You’re counting on the state tax benefit to justify the study: the state benefit is real but smaller and spread over time due to California’s bonus depreciation decoupling

• You’re a passive investor in a low tax bracket: the deductions may carry forward unused

• You’re buying a condo under ~$400K in a less desirable location: the interior-only basis may not produce enough acceleration

Cost Segregation by City in California

Opportunities vary by city. Select a market below to see estimated savings and a detailed MACRS breakdown.

San Diego, CA

Median STR: $850,000 · ~$42,000–$82,000 Year-1 savings · See San Diego breakdown →

Los Angeles, CA

Median STR: $1,000,000 · ~$50,000–$95,000 Year-1 savings · See Los Angeles breakdown →

San Francisco, CA

Median MTR: $1,750,000 · ~$80,000–$165,000 Year-1 federal savings · See San Francisco breakdown →

California Cost Segregation Guides

• Cost Segregation in San Diego, CA
• Cost Segregation in Los Angeles, CA
• Short-Term Rental Cost Segregation Condo Cost Segregation Multifamily Cost Segregation Office Cost Segregation Cost Segregation Calculator

See Your Estimated California Savings

Run your numbers in under 30 seconds. 100% bonus depreciation is available now under federal law. See Your California Tax Savings →

Starting at $495 for residential studies under $300K basis. Usually delivered the next business day for simple residential SFR / STR; 3-5 business days for properties over $3M or commercial. Money-back guarantee.

For properties over $10M basis (large multifamily, hospitality, institutional commercial): same-day preliminary, ~2 weeks post-close final. By proposal.

CPA use note: These figures estimate the size of the depreciation deduction. Whether the loss is usable in the current year depends on passive-activity rules, STR material participation, REPS status, entity structure, depreciable basis, and state conformity. Your CPA decides how and when it is applied. Specialty and site components (equipment, casework, docks, pools, arenas, tenant improvements, and similar) are only classified when you own them and they are included in the depreciable basis being studied.