You May Be Here Because…
A property decision, tax bill, or study proposal has made cost segregation relevant now.
You recently acquired a property
You completed major renovations
You heard about 100% bonus depreciation
You purchased the property years ago
You are planning a sale or 1031 exchange
A projected deduction is not the same as a usable tax benefit.
Cost segregation may accelerate depreciation into earlier years. Passive-loss rules can suspend the deduction, California may treat it differently, and a future sale can change the economic result.
Before you pay for a study
Will the deduction reduce your tax this year?
Cost segregation separates eligible building costs into asset groups with different tax lives. It can move some deductions into earlier years. It does not decide whether you can use those deductions now.
1. Check the income it can offset
Rental losses are generally passive. They usually offset passive income, rather than wages or portfolio income. A larger deduction may become a suspended loss carried to a later year.
2. Review the exceptions
Some owners may qualify for a limited rental-loss allowance. Federal real estate professional rules also require material participation. Short-term rentals need their own rental, service and participation review.
3. Run the California calculation
California does not allow federal bonus depreciation and does not follow the federal real estate professional exception. Keep separate state depreciation and passive-loss calculations.
The timing matters
A suspended loss is not the same as a lost deduction. It may become usable when future income or a qualifying disposition permits it. A sale, gift or 1031 exchange does not automatically release every suspended loss.
Review tax basis, the amount at risk, passive-loss rules and other applicable loss limits together. Your CPA should compare the added deduction with the deduction you would receive without the study.
Sources: IRS Publication 925; FTB Publication 1001; FTB 3801 instructions.
Is Your Property Worth Reviewing?
The property and the owner’s tax facts both matter.
More Promising
- Material depreciable building basis after land
- Commercial, multifamily, industrial, medical, retail, hospitality, self-storage, restaurant, or qualifying rental property
- Recent acquisition or substantial improvements
- Deductions may be currently usable
- Property is expected to be held for several years
Requires Closer Review
- High W-2 income or uncertain loss usability
- Existing suspended passive losses
- Partnership, short-term rental, or material-participation questions
- High land allocation or smaller building basis
- Sale may occur within the next several years
Received a Cost Segregation Proposal?
A free estimate may show accelerated depreciation without analyzing your complete return, California adjustments, suspended losses, study economics, or exit plan.
The Study and the Tax Strategy Are Two Different Jobs
Both matter. They answer different questions.
Study Provider
- Identifies and measures building components
- Applies engineering-based classification methodology
- Documents shorter-life asset allocations
- Produces the cost segregation report
JH Group CPA
- Evaluates whether the deduction may be usable
- Models federal and California tax treatment
- Considers passive-loss, at-risk, and participation facts
- Coordinates the study with the return and exit strategy
The engineering study identifies the components. The tax strategy determines whether the study creates value.
The advisory engagement
Cost Segregation Tax Strategy Review
Our review goes beyond the report to determine whether the strategy makes sense for your property and tax situation.
Evaluate Deduction Usability
Assess whether accelerated depreciation may improve the current tax position or become suspended.
Model Federal and California Impact
Compare depreciation timing and limitations under the two systems.
Review Study Scope and Assumptions
Assess methodology, study level, basis, and relevant property facts.
Analyze Timing and Economics
Compare the expected timing benefit, study cost, and holding period.
Review Future Sale Consequences
Consider adjusted basis, depreciation recapture, and potential 1031 planning.
Provide Strategy and Next Steps
Recommend whether to proceed, adjust the scope, wait, or decline the study.
California Owners Need Two Projections
A national estimate may not show the complete California result.
Federal
- Qualifying shorter-life property may receive accelerated depreciation
- Certain qualified property acquired and placed in service after January 19, 2025 may qualify for 100% bonus depreciation
- Passive activity, at-risk, and other limitations still apply
- Future sale and recapture remain part of the analysis
California
- California does not conform to federal bonus depreciation
- Separate depreciation schedules and state adjustments may be required
- The federal deduction does not equal the California deduction
- State tax timing should be modeled over the expected holding period
Source check: October 6, 2026. Eligibility depends on acquisition, placed-in-service, property, taxpayer, and election facts.
Federal qualification does not settle the state result
Federal 100% bonus depreciation may apply to eligible property acquired and placed in service after January 19, 2025. The acquisition rules, property classification, elections and service date still matter. Land and the building shell do not become bonus-eligible merely because a study is completed.
California's separate real estate professional treatment can also change when a rental loss is usable. Model both returns before estimating the cash benefit.
Sources: IRS Publication 946; IRS Notice 2026-11; FTB Publication 1001.
From Question to Implemented Strategy
- 1
Initial Screen
We learn about the property, ownership, timing, tax concern, and expected exit.
- 2
Engage and Review Securely
After engagement, relevant records are requested through TaxDome.
- 3
Coordinate the Study
If appropriate, we help define the study level and coordinate with the provider.
- 4
Implement the Tax Treatment
We reconcile the final study with the fixed-asset schedules and tax return.
Protect confidential information. Do not submit tax returns, closing statements, depreciation schedules, or other financial records through the public website form.
Illustrative only
Same added deduction. Different current result.
Assume a study creates $100,000 of additional depreciation for the year compared with the no-study schedule. Other facts are simplified.
Loss currently allowed
If the full added deduction is usable and offsets income taxed at an assumed 30% federal marginal rate, the current federal timing benefit would be $30,000.
Loss fully suspended
If passive-loss rules suspend the full added deduction, the current federal tax reduction from that added amount would be $0. The loss would be tracked for possible later use.
Then compare the whole plan
Subtract study and implementation costs. Compare California treatment, later deductions and potential sale tax. A larger first-year deduction does not guarantee better lifetime results.
Hypothetical math, not a client result or savings estimate. Tax rates, allowed losses, state treatment and future sale consequences vary.
Free decision guide
Before You Order a Cost Segregation Study: Check These 12 Items.
Use the checklist to evaluate assumptions, identify questions for your CPA, and understand which issues require a closer review.
- Basis and land allocation
- Study methodology and scope
- Bonus-depreciation assumptions
- Deduction usability and exit consequences
Get the Free Checklist
Name and email are required. Phone is optional. Do not submit confidential tax or financial information.
Straight answers
Cost Segregation Frequently Asked Questions
Can cost segregation offset W-2 income?
Not automatically. Rental losses are generally passive unless an exception applies. Real estate professional status, material participation, short-term rental facts, passive income, at-risk limits, and other taxpayer-level rules may affect whether the deduction is currently usable.
Does cost segregation work for a short-term rental?
It may, but the result depends on the average rental period, services provided, personal use, material participation, ownership, and other facts. A short-term rental should not be treated as automatically nonpassive.
Can I complete a study several years after purchasing the property?
In many cases, a look-back study may be possible. Claiming catch-up depreciation commonly requires CPA review and may involve an accounting method change rather than simply changing the current depreciation schedule.
Does California allow the same bonus depreciation?
No. California does not conform to federal bonus depreciation. Separate state depreciation adjustments and ongoing federal-to-California schedules may be required.
How much does a cost segregation study cost?
Pricing depends on the property, basis, complexity, records, site work, study methodology, and provider. The relevant question is whether the expected timing benefit justifies the fee and implementation burden.
Will cost segregation increase audit risk?
No strategy is audit-proof. A defensible position depends on accurate basis, proper classification, reliable methodology, complete documentation, consistent return implementation, and support for the taxpayer-level treatment.
What happens when the property is sold?
Accelerated depreciation reduces adjusted basis and may affect gain and depreciation recapture. The exit timeline should be considered before the study is ordered, together with any potential 1031 exchange strategy.
Can JH Group CPA review a proposal I already received?
Yes. After confirming fit and scope, JH Group CPA can evaluate the proposal’s tax assumptions, expected deduction usability, California differences, study economics, and implementation requirements.
Tax-smart planning before the study
Do Not Decide Based Only on the Projected Deduction
Understand what the deduction may be, how much may be usable, what California may allow, what the study will cost, and what happens when the property is sold.
Request an Intro Call
Call 626-943-2888 or email info@jhgroupcpa.com.
Authoritative Sources
CPA lead: Jeff Huang, CPA, MBA. Sources checked and page updated: October 6, 2026.
JH Group CPA, A Professional Corporation serves qualified real estate owners from offices in Alhambra and Irvine, California.
This page provides general educational information and is not tax, legal, investment, engineering, valuation, or 1031 exchange advice for a specific taxpayer or property. Tax results depend on the facts, current law, elections, documentation, and implementation.