Can I Do My Own Cost Segregation Study?
Compare self-service software, professional study scope and the tax work a business owner may need beyond the report.
Discuss Your Property and Study OptionsYou can consider self-preparation or software, but first identify who will substantiate the inputs and use the output on your return. A report still needs support for asset classifications and cost basis. The right scope depends on the property, the records available and the tax decisions that remain after the report is delivered.
For an owner with profitable businesses and rental property, the main question may be whether the deductions can be used across the relevant returns. Neither software nor a professional property study automatically answers that owner-level question.
Separate the product from the work it includes
- Self-preparation: you assemble the records, support the allocation and resolve classification questions.
- Self-service software: the product processes your inputs under its methodology; verification, revisions and support vary.
- Professionally reviewed report: determine exactly what the reviewer checks and which facts remain your responsibility.
- Custom study: define the investigation, inspection, estimating and specialist analysis needed for the actual property.
These categories can overlap. The IRS audit guide describes how studies are evaluated; it does not certify products or guarantee a report's acceptance. See the study-method and evidence checklist for the documentation question.
Compare the complete scope before comparing fees
| Decision | Self-service or software: verify | Professional engagement: verify |
|---|---|---|
| Property inputs | Which facts you enter, which are estimated and how you can correct them. | Who checks the records and what inspection or measurements are included. |
| Property exceptions | Whether mixed use, phased improvements and unusual assets fit the product. | Which exceptions receive custom analysis and what that adds to scope. |
| Basis and history | Whether the output can be reconciled with land, prior assets and depreciation. | Who performs the reconciliation and resolves missing or inconsistent records. |
| Return implementation | Whether any calculation, filing tool or preparer assistance is included. | Who determines the filing procedure and prepares the federal and state work. |
| Questions and examination | What revisions and study questions the support terms cover. | Whether report support and taxpayer representation are distinct services. |
For a concrete product example, CostSegregation.com's own FAQ describes modeled quantities, written schedules and study audit support. It also distinguishes its self-service inputs from more precise professional work and discusses limits involving subsequent improvements. Check the current product terms for your facts rather than assuming all software has the same limitations or support.
The provider's published cost discussion also separates price from quality. A useful comparison asks what you receive and what remains to be done, not which vendor forecasts the highest reclassification.
Two owners can need different engagements
A straightforward rental with complete records
An owner has one acquired rental, a supported land allocation, a single service date and a return preparer who will review the output. A suitable self-service product may be worth considering if the owner can validate its inputs and the preparer agrees the resulting evidence and schedules are usable. Confirm property eligibility, corrections and total implementation cost before paying.
A business owner with renovations and several entities
Another owner has operating-business income, rentals held in separate entities, improvements completed in different years and suspended rental losses. The property study must reconcile the assets and service dates. Separate tax work must determine who owns the deductions, which limitations apply and when the owner can use them. A larger projected deduction does not establish that it offsets the operating-business income.
Discuss whether you need a custom property study, a review of an existing report, return implementation, broader advisory work or some combination. Ask AE to specify the accepted work and exclusions in the proposal rather than assuming every service is bundled.
Measure value using usable cash flows
Compare the proposed classifications with the depreciation otherwise available under IRS Publication 946. Then review the applicable basis, at-risk, passive-activity and other limitations; Publication 925 explains the passive-activity and at-risk rules. Include study and implementation fees, state treatment, later depreciation differences and the expected exit.
Use the quote comparison checklist for written scope and the holding-period decision guide when a sale is possible. A fee is justified by the supported work and its value to your circumstances, not by a deduction multiplied by a tax bracket.
Keep AE advisory pricing separate from the study quote
$7,800 advisory engagement. No required recurring annual planning fee.
Two payments of $3,900, 30 days apart. Tax returns, amendments, cost segregation, and additional services are separately scoped and priced. No annual planning renewal is required by the standard engagement; this does not promise unlimited future planning or free annual filing.
For the study itself, review AE's published cost segregation pricing and scope. Do not use the advisory fee as the study price. The written proposal controls the work accepted for your property.
See all service pricing · Compare engagement fees with annual retainers
Prepare for a scope discussion
Bring the property type, square footage, acquisition and service dates, ownership entity, land allocation, improvements and current depreciation schedule. If you already have a proposal or software report, identify the missing records and any questions your return preparer cannot resolve. Include your filing deadline and expected sale timing.
Review Your Property and Required Work
Examples illustrate buying decisions, not client results or guaranteed savings. Provider descriptions and sources reviewed November 6, 2026. Confirm current terms and apply the rules for the relevant tax year.
Frequently Asked Questions
Can I do my own cost segregation study?
Self-preparation or software may be an option, but the taxpayer must substantiate the classifications and basis used on the return. Determine who can verify the inputs, resolve unusual components and reconcile the report. The IRS audit guide does not prescribe one preparer credential or certify a software product.
When should I consider a more detailed professional study?
Consider additional work when the property has separate renovation phases, specialized systems, mixed uses, incomplete records or uncertain prior depreciation. Ask the provider to explain what its standard method cannot resolve and price the additional work before you decide.
Does software include Form 3115 and tax-return preparation?
Coverage varies by product and engagement. A report or catch-up calculation does not establish that eligibility analysis, Form 3115 preparation, federal and state implementation or representation is included. Confirm the responsible preparer, deliverables and separate charges in writing.
How should I compare the total cost?
Compare the same property, records review, report, corrections and support period. Add separately priced filing and advisory work. Test the fee against incremental tax cash flows that the owner can actually use, including later depreciation changes and sale consequences.
Is AE's $7,800 advisory engagement the price of a cost segregation study?
No. The standard advisory engagement is $7,800, payable in two $3,900 payments, 30 days apart. Cost segregation, returns, amendments and additional services are separately scoped and priced. No required annual planning renewal does not mean unlimited future planning or free annual filing.