Cost segregation resources for CPAs and tax professionals

A working checklist for the adviser who signs the return: what to verify in a study before applying it, what to model before electing, and how to document reliance.

The documents a defensible cost segregation study is built on, what each one proves, what to do when a record is missing, and why the site visit matters.

Every honest cost segregation report states its assumptions and limits. What those sections mean, which limitations are normal, and which ones are warnings.

Twelve warning signs in a cost segregation study or a sales pitch, drawn from the elements the IRS guide expects, and what each one means before you rely on it.

The IRS publishes what its examiners request and review when a return with a cost segregation study is examined. What they ask for, what they test, how to be ready.

What each section of a real cost segregation report contains, what a reader should check in it, and how the sections map to the elements the IRS guide expects.

A typical percentage is not a method. Why rule-of-thumb reclassification fails as evidence, how the IRS guide treats it, and what a real study does instead.

A guided reading of a rental property depreciation schedule: what each column means, how Form 4562 relates to it, and what a cost segregation practitioner looks for.

How the permanent 100 percent bonus depreciation for property acquired after January 19, 2025 works with cost segregation, what still phases down, and what to check.

Qualified improvement property is 15-year, bonus-eligible interior work on nonresidential buildings. What counts, what is excluded, why residential is out.

Both expense property in year one, but section 179 needs a trade or business and has dollar and income limits; bonus depreciation does not. Which fits a rental.

Federal bonus depreciation does not always travel to the state return. How decoupling works, three state examples from official sources, and what to track.

How a cost segregation study is applied to a building placed in service in an earlier year: the change in accounting method, the 481(a) adjustment and the limits.

What happens on sale after a cost segregation study: section 1245 recapture at ordinary rates, unrecaptured section 1250 gain at up to 25 percent, and the trade-off.

A rental loss you cannot use this year is suspended, not lost. How carryforwards work, when they are released, how Form 8582 tracks them, and what a study adds.

Cost segregation produces deductions, not refunds. Why the cash benefit depends on your rate and the passive activity rules, and how to read a projection.

The de minimis safe harbor lets an owner deduct low-cost items instead of depreciating them. The thresholds, the required procedures, and how it fits with a study.

A renovation adds new assets and retires old ones. How improvements are capitalized, how a study classifies them, and how the partial disposition election works.

A like-kind exchange defers gain on real property. Where section 1245 components fit, what counts as real property for section 1031, and what carries over.

Inherited property takes a new basis at the date of death. What that means for a study, why bonus depreciation is generally unavailable, and what heirs should keep.

In a partnership the study is done once and its deductions pass through on K-1s. What a limited partner can actually use, and what to ask a sponsor before investing.

A study on a building you built works from cost records; one on a building you bought works from a price and estimates. How each is done, dated and reconciled.

Accelerated depreciation is a deferral. Sell soon after and recapture arrives before the deferral earns anything. How to weigh a short hold and what changes it.

What the IRS says about preparer qualifications, why engineering and tax knowledge both matter, whether you can do your own study, and how to check a preparer.

A step-by-step way to choose a cost segregation practitioner: what to ask, what a sample report should contain, how fees should work, and how to verify a credential.

A study is an input to a return, not a tax decision. When the adviser must be involved, what they decide, and how practitioners and advisers divide the work.

Plain definitions of the terms used in cost segregation and rental depreciation, from basis and bonus depreciation to recapture and unit of property, with sources.