Cost Segregation Software and DIY Tools Compared (2026)
Four self-serve tools, priced $25/month to $2,500+, compared on what they deliver and who stands behind it.
Editorial note: Cost Segregation Reviews is operated by Cost Seg Smart, which appears as one option among many on this site, including in the comparison below. Public-facing data only — pricing, methodology, and credentials reflect what each vendor publishes on its own site. See how we rank for our full methodology and disclosures. Reviewed September 2026.
Cost segregation software and DIY tools let a property owner run their own component analysis instead of hiring a firm to do it. Every tool on this page still has to land on the same federal framework as an engineered study: components get sorted into MACRS 5-, 7-, 15-, or 27.5/39-year property under Rev. Proc. 87-56, personal property gets classified under §1245 as distinct from the building's §1250 real property, and 100% bonus depreciation under §168(k) makes the reclassified amount deductible in year one. What differs across these tools is not the classification rules — it is who reviews the output, whether a physical inspection happens, what documentation backs each number, and how much audit support is included versus sold separately. The IRS Cost Segregation Audit Techniques Guide (Pub 5653) describes what examiners look for in a quality study; see our software versus engineered study guide for how that checklist maps onto what these vendors publish.
Who these tools suit
These tools tend to fit an investor who wants a fast, low-cost first pass on a straightforward residential rental, is comfortable entering their own property data, and plans to have their own CPA review the output before filing. They fit less well for a first-time buyer who wants a provider to identify a signer and stand behind the numbers without an extra step, for a property with unusual construction or renovation history that benefits from a documented physical inspection, or for a commercial property that most of these tools do not price at all.
Software and DIY tools compared
Every figure below is published by the vendor on its own site. "Not published" means exactly that — never an estimate.
| Tool | Price | What you get | Who prepares/signs | Audit support | Property types |
|---|---|---|---|---|---|
| CostSegEZ | $595 / $895 / from $2,500 | DIY, Engineer Reviewed, or Fully Engineered tier | Engineer-led process; signer not specified | Included on top tier; $195 add-on otherwise | Residential (all); commercial (top tier only) |
| DIY Cost Seg | $495-$1,795 res. / $1,295-$3,695 comm. | Instant online report; $49 corrections | Not stated as engineer- or CPA-signed | Optional add-on supports your CPA; no IRS representation | Residential 1-4 units; commercial 5+ units |
| Titan Echo | $25/month subscription | Software platform + mobile on-site capture app | Not specified | Marketing claim only (100% success rate); no stated terms | ~$100K rentals to $10M+ commercial |
| RentalWriteOff | $899 flat fee | Smart Report & Itemization, Form 3115 if eligible | "Expert-reviewed"; signer not specified | 2 free hours within 5 years, then $300/hour | Residential rental only (SFR-4plex, STR, mobile homes) |
Software versus an engineered study
The price gap between software and an engineered study is smaller than it looks at the entry level, and larger the more property-specific documentation you want. Cost Seg Smart prices a residential engineered study at $495 for property under $300,000 and $895 for $300,000-$700,000 — both figures sitting inside the price range DIY Cost Seg publishes for its own residential tier ($495-$1,795), and below RentalWriteOff's single $899 fee. On the commercial side, Cost Seg Smart prices standard commercial (office, retail, mixed-use) under $1 million at $1,995 and industrial/warehouse under $1 million at $2,495 — a bracket only one of the four tools compared here (CostSegEZ's Fully Engineered tier, from $2,500) reaches at all, since the other three publish no commercial pricing or cap out well below $1 million in property value.
What separates the two categories is less the fee and more what's included in it. None of the four software tools reviewed here publishes an explicit "a licensed engineer signs this report" statement; two describe a review step (CostSegEZ's Engineer Reviewed and Fully Engineered tiers, RentalWriteOff's "expert-reviewed" language) without naming a credential. Audit support is capped or sold separately on three of the four. A buyer choosing between the categories is really choosing between price and self-sufficiency on one side, and a stated review step, documentation depth, and audit-support scope on the other — not choosing between two ways of reaching the same number. See our full breakdown at software versus an engineered study.
FAQ
Is cost segregation software the same as an engineered study?
Not necessarily. All four tools compared here apply MACRS classification under Rev. Proc. 87-56, the same framework an engineered study uses. What varies is who reviews the output before delivery, whether a licensed engineer or CPA is identified as the preparer, and how much documentation supports each classification. Only one of the four (CostSegEZ's Fully Engineered tier) is described by its vendor as a fully engineered study; the others are self-serve or lightly reviewed software output.
How much does cost segregation software cost compared to an engineered study?
The four tools compared here range from $25/month (Titan Echo) to $2,500+ (CostSegEZ's Fully Engineered tier), with flat-fee options at $495-$1,795 (DIY Cost Seg, residential) and $899 (RentalWriteOff). Cost Seg Smart, an engineered study delivered as a signed report, prices residential property under $300,000 at $495 and $300,000-$700,000 at $895 — overlapping the lower end of several software prices.
Does cheaper software mean less audit support?
Based on what each vendor publishes, generally yes at the entry price point. DIY Cost Seg's base tier excludes IRS representation entirely (its Audit Assistance add-on supports the client's own CPA/EA/attorney instead). RentalWriteOff caps free audit protection at 2 hours within 5 years, billing $300/hour beyond that. CostSegEZ charges $195 extra for audit protection on its two lower tiers, including it only in the Fully Engineered tier. Titan Echo publishes a marketing claim (100% IRS audit success rate) rather than a stated audit-support scope.
Can a CPA file a DIY cost segregation report the same way as an engineered study?
The mechanics are the same either way: a current-year property goes on Form 4562, and a lookback for a prior-year purchase goes on Form 3115. What differs is the documentation a CPA has to work with. The IRS Cost Segregation Audit Techniques Guide (Pub 5653) describes elements it looks for in a quality study and report, including who prepared it and whether the signer certifies they performed the analysis. See our guide to software versus an engineered study for how that checklist compares against what each tool publishes.
Sources
- https://costsegez.com (CostSegEZ)
- https://diycostseg.com (DIY Cost Seg)
- https://titanecho.com (Titan Echo)
- https://rentalwriteoff.com, /pricing, /terms (RentalWriteOff)
- IRS Cost Segregation Audit Techniques Guide (Pub 5653)
Accessed 2026-09-06. Cost Seg Smart pricing per its published pricing data, current as of September 2026.
Pricing and operational details reflect public information as of September 2026. Provider corrections welcome via the submission form. This page is not legal, tax, or financial advice — confirm cost segregation suitability with your CPA before ordering a study or using a software tool.