WriteOffOS flags potential deduction opportunities for CPA review across your real estate syndications — cost segregation, bonus depreciation, LP allocations — and hands your CPA a package they can actually use.
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WriteOffOS does not provide tax advice, prepare returns, or perform engineering-based cost segregation studies. It organizes information and generates CPA-review packages.
Click through the real workflow — sample data, the actual product screens.
Each of these is a real deduction category. Most GPs leave all of them underutilized.
of a commercial building's value can be reclassified to 5, 7, or 15-year property — depreciating in years, not decades.
OBBBA (July 2025) restored full first-year expensing for qualifying property placed in service after Jan 19, 2025 — the building shell generally doesn't qualify the same way shorter-life components do, and passive activity loss rules may limit current-year use. Your acquisition needs a professionally supported cost seg study.
In a sample $10M assisted-living facility — nurse call systems, emergency electrical, commercial kitchens — specialty systems may create six-figure accelerated-depreciation opportunities, subject to cost segregation analysis and CPA review.
Passive activity losses flow to LPs but must be tracked across years. Without a system, you are leaving future deductions unaccounted for.
Not a knock on your CPA. The tools they use were built for different problems.
ProConnect, UltraTax, Drake — these are return preparation tools. They accept what you give them. They don't scan your deal structure for cost seg opportunities or flag what you're missing before March 15.
InvestNext, Juniper Square — they distribute K-1s to your LPs after your CPA produces them. They assume the tax work is already done. WriteOffOS does the upstream work those platforms skip.
Keeper, FlyFin, and similar apps are built for freelancers and individual filers. They cannot handle partnership returns, LP allocations, or entity-level cost segregation. Wrong product category.
WriteOffOS is the layer that doesn’t exist yet. It sits between your deal and your CPA — identifying what you’re owed, structuring it by LP, and handing your accountant a package they can act on instead of spend hours building.
From deal structure to CPA-ready package in three steps.
Add your properties and entities — GP, LP, operating company. WriteOffOS maps the tax relationships between them: what each layer generates, what flows to LPs, what stays at the entity.
WriteOffOS flags common cost segregation, bonus depreciation, and passive-loss tracking issues based on structured deal data and documented review rules — organized for your CPA to confirm before anything is filed.
One organized file — deductions sourced to their IRC code, cost seg components identified, LP allocations calculated. Your CPA acts on it instead of building it from scratch. K-1s go out on time.
Not for the part-time landlord with two rentals. For operators with LP investors, quarterly reporting, and complex depreciation schedules.
2–20 active deals, 10–100 LP investors, quarterly K-1 obligations. You need deduction intelligence before your CPA needs input.
3–5x more tax complexity than standard multifamily. Nurse call systems, commercial kitchens, emergency electrical — all specialty-depreciation-eligible.
Retail, office, mixed-use. Multiple entity layers and depreciation schedules that standard bookkeeping tools were not designed to handle.
You are legally responsible for accurate K-1s. WriteOffOS tracks suspended passive losses across your full deal lifecycle so nothing falls through.
The One Big Beautiful Bill Act (July 2025) permanently restored 100% bonus depreciation on qualifying property. On a $5M multifamily deal, an engineering-based cost segregation study commonly reclassifies 20–30% of depreciable basis to shorter-life property — often $1M+ that 100% bonus depreciation lets you deduct in year one instead of spreading it across 39 years. Actual figures depend on the study and your CPA’s review.
The catch: you need the cost seg study in place at acquisition. Not at filing time. WriteOffOS flags this window at deal intake — before the close — so you never leave it behind.
Start your free trial →You’re handing over tax documents and deal data. Here is how it stays isolated, encrypted, and visible only to you and the CPA you authorize.
Every request is walled off to your account on the server. No other customer can reach your deals, documents, or analyses.
Your documents are stored under a private, random path and are never exposed through a public or guessable URL.
TLS on every request; data encrypted at rest on Azure infrastructure. Passwords hashed with bcrypt — never stored in plain text.
Every account requires app-based 2FA in addition to a password. Sign-in is rate-limited against brute force.
No per-user fees. No per-LP fees. No per-deal fees.
Refer a firm and they’re automatically credited a free month when they subscribe — plus you pick your own reward. Or record a 60-second story about your deals and we’ll thank you for it.
15 minutes to connect your first property. Most operators surface deductions they have been leaving behind within the first session.
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