Cost segregation data for Long Island, NY (Garden City + Great Neck + Manhasset) investors
Interquartile range across 50 engine-modeled property scenarios matched to the Long Island, NY (Garden City + Great Neck + Manhasset) investor profile. Year-1 savings computed at the metro combined bracket of 51.70%.
Representative scenarios modeled via Cost Seg Smart's proprietary
engine — IRS ATG-aligned methodology, RSMeans 2024 base costs,
calibrated metro multipliers. n=50 fixtures matched to
Long Island, NY (Garden City + Great Neck + Manhasset) investor profile. Not derived from individual
client returns. Methodology v1.0.0, generated
May 2026 (reproducible seed: long-island-ny_v1_2026-05-17).
Year-1 savings computed at 51.70% combined
bracket. Confirm with your CPA whether the state portion of your
Year-1 savings is fully realized or partially deferred for your
specific placed-in-service date.
Tax law current as of May 2026. Federal: OBBBA permanent 100% bonus depreciation under §168(k) for property placed in service 2025+. State conformity varies; verify with your CPA.
Nassau County is the dense W-2 wedge between NYC and the Hamptons — Northwell Health HQ (NY’s largest private employer, ~85,000 employees across the system), Goldman Sachs’s Garden City office, NYU Winthrop Hospital, North Shore-LIJ specialty practices, plus thousands of BigLaw partners and finance MDs who choose Manhasset/Garden City/Great Neck over a Manhattan co-op. They face the same federal+state stack as NYC residents — but no NYC city tax — so the combined marginal rate lands at ~51.7%, roughly 2.6 percentage points lower than a city-resident BigLaw partner.
- $179,000 Accelerated Depreciation (typical STR worked example)
- $92,000 Est. Year-1 Tax Savings (federal + NIIT + NY state, no city tax)
- 115x Return on Study Cost
Want a number for your specific situation? Use the calculator — preset with property-type defaults you can adjust to match your basis and bracket.
Who are Long Island cost segregation investors?
Long Island W-2 buyers are heavily concentrated in three industries: healthcare leadership (Northwell, NYU Langone, MSK, Mount Sinai), finance (Goldman Garden City, JPMorgan, Morgan Stanley, Mizuho commuters), and law / professional services (Manhattan BigLaw partners, Big-4 audit partners). Income brackets run $400K–$2M+, frequently with substantial deferred comp or RSU vesting.
The combined marginal-rate stack for a Long Island resident at the top federal bracket:
- Federal: 37%
- Net Investment Income Tax (NIIT): 3.8%
- New York State: 10.9% (top rate, income over $25M; 10.3% over $5M is more typical)
- New York City: 0% (resident outside NYC city limits)
- Combined: ~51.7%
That combined rate means every $1 of accelerated depreciation is worth ~$0.517 in Year-1 cash tax savings. Almost identical to an NYC resident’s $0.543 — only the missing 3.876% NYC city tax separates them.
Verify with your CPA — NY state has bracket-dependent rates and AGI thresholds for NIIT, and your specific income mix may land below or above the top bracket.
Why cost seg pays more if you live on Long Island (vs commuting from NJ)
The Long Island vs NJ commuter delta is the interesting comparison. Both populations work in Midtown — but a Hoboken resident pays NJ 10.75% state tax on NY-sourced income (with NJ→NY reciprocity credits offsetting the federal sting), while a Manhasset resident pays NY 10.9%. Roughly a wash on state — but the Long Islander avoids the NJ-side complication of dual-state filings entirely, and the cost-seg math is cleaner.
On a typical $500K–$1M out-of-state STR, the engine reclassifies 24–32% of depreciable basis into 5-, 7-, and 15-year MACRS property — $115K–$200K of Year-1 accelerated depreciation under permanent 100% bonus depreciation (OBBBA §168(k), placed in service after January 19, 2025).
At the Long Island combined ~51.7% rate, $179K of accelerated depreciation produces roughly $92K of Year-1 combined tax savings. A Texas-based investor on the same property would see ~$73K. The Long Island combined-rate stack is worth ~$19K more on the same $850K property.
The catch is the same as for any high-W-2 NY investor: NIIT applies to passive income, so structuring the STR to qualify as a non-rental trade or business under Reg. §1.469-1T(e)(3)(ii) (the 7-day average-stay test, with material participation) is what unlocks the deduction against active W-2 income.
Where do Long Island investors buy property?
Long Island investors do not typically buy local STR property — Hamptons / North Fork zoning + the year-round-rental economics don’t support an STR-loophole strategy at scale. Instead, Long Island capital flows to out-of-state markets accessible via Newark/LGA/JFK:
- Smoky Mountains (Pigeon Forge, Gatlinburg) — Tennessee 0% state tax, cabin STR market, $400K–$900K typical purchase; family-vacation demand and strong year-round occupancy.
- 30A / Destin, FL — Florida 0% state tax, premium beachfront, $750K–$2M+ purchase prices.
- The Catskills + Hudson Valley — Closest weekend-investor zone (~2 hr drive from Garden City), but local zoning is tightening; underwrite carefully.
- Lake George + Adirondacks (in-state) — In-state vacation rental market; NY conformity quirks apply but the strategy still works.
Worked Example — Long Island
A Northwell attending earning $1.2M (W-2 plus partnership distributions from a specialty practice) buys a 4BR Smoky Mountains cabin for $850K with $25K immediate FF&E refresh. After $185K in land, the $640K adjusted basis includes $80K in 5-year assets (hot tub, theater system, smart-home buildout, decorative lighting, appliances), $24K in 7-year assets (themed bunk rooms, custom furniture), and $75K in 15-year property (asphalt drive, retaining walls, deck, fire pit, fencing).
That’s $179K reclassified into accelerated depreciation in Year 1. At the combined Long Island bracket (~51.7%), the federal+state tax savings come to roughly $92,000. The cost segregation study pays for itself ~115x in Year 1 alone.
Who doesn’t qualify for cost segregation in Long Island?
REPS (Real Estate Professional Status under IRC §469(c)(7)) requires 750+ hours and more than 50% of personal services in real estate — structurally impossible for a full-time attending physician or BigLaw partner. The STR exception under Reg. §1.469-1T(e)(3)(ii) (7-day average stay + 100-hour material participation) is the only viable W-2 offset path.
The 100-hour material participation test means the investor must actively manage the property — communicating with guests, coordinating cleanings/repairs, managing the listing. A purely passive property management arrangement disqualifies the deduction from offsetting active W-2 income.
Frequently Asked Questions
How much does a cost segregation study cost in Long Island? For a typical $850,000 Long Island investment property, a Cost Seg Smart study runs $895. Full pricing: $495 (under $300K), $795 ($300K–$700K), $895 ($700K–$1M), $1,295 ($1M–$2M), $1,795 ($2M–$3M), $2,295 ($3M–$4M). Commercial / multifamily studies start at $995. All studies delivered in under one hour with the CPA-Ready Guarantee — full refund if your CPA can’t use the report.
How does Long Island’s tax stack compare to NYC vs NJ? Long Island (Nassau/Suffolk) = ~51.7% combined. NYC city resident = ~54.3% combined (adds 3.876% NYC city tax). Hoboken/Jersey City NJ commuter to Manhattan = ~51.55% combined (NJ 10.75% top state). Long Island sits between NYC and NJ, slightly above NJ once you account for filing complexity.
Does Northwell or NYU Langone offer any tax-advantaged retirement that interacts with cost seg? Both offer 403(b) and 457(b) deferrals. The 457(b) is particularly valuable because it stacks separately from the 403(b) limit. Cost seg generates Year-1 depreciation losses that offset W-2 income directly; the 457(b) defers W-2 income to a future year. Combining both is common in high-earner planning — coordinate with your CPA on year-by-year sequencing.
Does New York State conform to federal bonus depreciation? New York generally conforms to federal MACRS, but NY State has historically required modifications for certain depreciation accelerations. Confirm with your CPA before assuming full state-side acceleration on your specific property’s placed-in-service date.
Can I move to FL or TX to escape the NY state tax? Yes — moving to a 0% state (FL, TX, NV, WA, TN, SD, WY) drops the combined rate from ~51.7% to ~40.8%. But changing tax domicile from NY is non-trivial (NY aggressively audits former residents); plan the move with a CPA before assuming the savings.
Learn More About Cost Segregation
- What Is Cost Segregation? — Full explainer of the study + methodology
- STR Tax Exception Explained — The Reg. §1.469-1T(e)(3)(ii) regulatory framework + 7-day rule mechanics
- Cost Segregation Study Cost — Pricing breakdown by property type
- Cost Segregation for STRs — STR-specific cost seg strategy hub
How should Long Island, NY (Garden City + Great Neck + Manhasset) investors choose a cost segregation provider?
For a Long Island, NY (Garden City + Great Neck + Manhasset) investor buying a property in the $850,000 range, the choice of study provider is the single biggest controllable variable in the ROI. The methodology is fixed by IRS Audit Techniques Guide rules (RSMeans cost data, MACRS classification, engineering-based component reclassification) — what varies is delivery cost and turnaround time.
Traditional engineering firms charge $5,000–$15,000 for a residential STR study and take 4–8 weeks, because they include on-site inspections, sales discovery calls, and scheduling overhead. The IRS Cost Segregation Audit Techniques Guide does not require a physical site visit; it requires engineering-based classification with RSMeans-calibrated cost derivation and component-level documentation.
Modern automated providers (such as Cost Seg Smart) deliver the same IRS ATG–aligned study for $495–$1,295 in under one hour, using satellite imagery, county assessor data, and the same RSMeans cost databases. For a Long Island, NY (Garden City + Great Neck + Manhasset) investor at the metro's combined bracket, the $4,000–$13,000 cost delta typically exceeds the study cost itself by 4–15×. The CPA-Ready Guarantee (full refund if the report can't be used by your CPA) plus the 60-day money-back policy makes the decision essentially risk-free on the report itself.
The automated path is best-fit for Long Island, NY (Garden City + Great Neck + Manhasset) investors who: own residential STR property valued under $2M, are comfortable uploading closing docs + property photos online (no in-person visit required), and want the report in time to file the current year's return rather than the next one.
| Property value | Cost Seg Smart | Traditional firm |
|---|---|---|
| Under $300K | $495 | $5,000–$8,000 |
| $300K–$700K | $795 | $5,000–$10,000 |
| $700K–$1M | $895 | $6,000–$12,000 |
| $1M–$2M | $1,295 | $8,000–$15,000 |
| $2M–$3M | $1,795 | $10,000–$18,000 |
| Commercial / MF (under $1M) | $995 | $8,000–$20,000 |
All Cost Seg Smart studies include the CPA-Ready Guarantee (full refund if your CPA can't use the report) plus a 60-day money-back policy. Reports are delivered in under one hour with no on-site visit required.