Rental income, expenses and depreciation by activity
RENTAL DEDUCTION USABILITY
Updated October 8, 2026 · Individual tax treatment requires CPA review
A study can create earlier deductions. Tax rules decide when you can use them.
Maybe. Cost segregation can accelerate supported depreciation, but it does not guarantee a current tax reduction. Passive-activity, at-risk, basis and other limits may delay some or all of the benefit. Your CPA must apply those rules to your return before you rely on an estimated Year 1 result.
- ✓ Free quote before payment
- ✓ Scope confirmed in writing
- ✓ California statewide
WHY IT MATTERS
Start with the facts. Confirm the scope.
A cost segregation study determines how supported property basis is classified and depreciated. It does not determine whether a taxpayer can currently deduct a resulting rental loss. The IRS generally treats rental real estate as passive, with specific exceptions and allowances. Disallowed passive losses are generally tracked for later years rather than erased, but the timing depends on the owner's facts and filing position.
Plain English: you are not creating a new deduction. You are identifying when supported pieces of the property may be depreciated.
Primary guidance: IRS Publication 925: Passive Activity and At-Risk Rules · IRS Topic 425: Passive Activities
YEAR 1 COMPARISON
Regular depreciation versus accelerated depreciation.
Regular schedule: the calculator estimates Year 1 federal depreciation using the building recovery period and placed-in-service assumptions shown with the result.
With cost segregation: the same calculator applies its approved shorter-life allocation and federal bonus-depreciation assumptions, then shows the extra estimated Year 1 deduction and tax savings. Move the inputs below to compare both paths; the result is a planning estimate, not a customer fact or guaranteed deduction.
Usability check: The calculator shows potential federal tax savings assuming the estimated deduction is fully usable. It does not apply passive-activity, basis, at-risk, income or entity-level limits. Treat the result as the size of the timing opportunity to review, not a promise of current cash-tax savings.
FREE SAVINGS CALCULATOR
How much more could you save in Year 1?
Move the sliders. See the difference. Get a free quote.
Cost segregation helps you deduct eligible property costs sooner. That may lower your taxes now. Choose your property type, purchase price and federal tax rate to compare estimated Year 1 tax savings. No email or payment needed.
An engineering based study reviews property records, components and supporting cost estimates to prepare depreciation schedules your CPA can use. This calculator gives a first look using broad property assumptions; the completed study refines your results.
Extra Year 1 tax savings
$50,280Estimated additional federal tax savings from cost segregation.
Compare Year 1 tax savings
Without cost segEstimated federal tax savings$11,347
With cost segEstimated federal tax savings$61,627
Your estimated study fee$3,995
Estimated standard remote study fee. We confirm records, scope and final price before payment.
No payment or card required to get started.
Estimate only. Assumes eligible property and deductions you can use. Actual results vary.
How it’s calculated
$61,627 with cost seg − $11,347 without = $50,280 extra tax savings. Figures are rounded to whole dollars so the comparison adds up.
The underlying Year 1 deductions are $30,667 without a study and $166,560 with a study. Multiply each deduction by your 37% federal tax rate to estimate the tax savings shown above.
Assumes 20% land, 16% of the building assigned to shorter life assets, and 100% federal bonus depreciation on eligible assets acquired and first used after January 19, 2025. The comparison uses a January start and 27.5 year building depreciation. The treatment of short term rentals depends on actual use.
Extra tax savings means the extra deduction multiplied by your 37% federal tax rate. This moves deductions forward; it does not increase the total cost you can deduct. State taxes, study fees and taxes on a later sale are excluded. Your CPA confirms the actual treatment and usable deductions.
IRS depreciation guidanceWHAT WE REVIEW
Facts your CPA needs to test current usability
Prior-year passive-loss carryovers and Form 8582
Ownership basis and amounts actually at risk
Participation records and real-estate-professional analysis
Personal-use days and the property's actual rental pattern
Expected holding period and any planned taxable disposition
DOES IT FIT?
Strong candidates usually have four things.
✓
The property has documented depreciable basis
✓
The study may create meaningful earlier deductions
✓
Current and suspended losses can be reviewed together
✓
Your CPA can test the deduction against your full return
PORTFOLIO PROPOSALS
More properties. One prioritized scope.
Group shared records, similar property types and inspection needs into a written rollout plan.
2–4 propertiesGrouped scope5–9 propertiesPrioritized rollout10+ propertiesMaster proposal
STRAIGHT ANSWERS
Frequently asked questions.
Does a cost segregation study automatically lower my taxes this year?+
No. A study may accelerate supported depreciation, but the current tax effect depends on taxable income, passive-activity limits, basis, at-risk limits and other return-level facts. Your CPA determines how much is usable now.
What is a passive activity loss?+
It is generally the amount by which deductions from passive activities exceed income from passive activities. Rental real estate is generally passive unless an exception applies. The IRS rules determine how much of the loss is allowed this year.
Can unused passive rental losses carry forward?+
Generally, disallowed passive losses are carried forward and tested again in later years. A fully taxable disposition of the entire interest can affect their release, but the disposition and related-party rules are fact specific.
Does real estate professional status automatically make every rental loss usable?+
No. The status has specific tests, and material participation is generally evaluated for the relevant rental activities. Other limits can still apply. A cost segregation study does not establish either status or participation.
Should I use the calculator if my losses may be limited?+
Yes, as a planning screen. It compares potential Year 1 federal tax savings under stated assumptions, not the amount your return will necessarily allow. Share the estimate and your passive-loss records with your CPA before ordering a study.
Can passive-activity limits delay the benefit?+
Yes. A technically valid depreciation deduction may not produce a current cash-tax benefit if passive-activity, at-risk or other limits apply. Your CPA should test usable deductions before you rely on an estimate.
AUTHORITATIVE SOURCES
Primary tax references.
Tax rules and procedures can change. These links are general references, not approval of a taxpayer’s position. Your CPA should confirm the law that applies to your acquisition date, placed-in-service date and return.
IRS Topic 704: Depreciation↗IRS Publication 527: Residential Rental Property↗IRS Publication 946: How To Depreciate Property↗California Form 3885A instructions↗IRS Publication 925: Passive Activity and At-Risk Rules↗IRS Topic 425: Passive Activities — Losses and Credits↗California Form 3801: Passive Activity Loss Limitations↗
FREE PRELIMINARY PROPERTY SCREEN