If you live in Bellevue, Redmond, or Kirkland and earn a W-2 in Eastside tech, you pay federal + NIIT only: Washington has no state income tax. Your combined bracket caps at ~40.8%, meaningfully lower than NY/CA/MA, but RSU-heavy comp gives you more disposable capital to deploy into out-of-state STR.
- $164,000 Accelerated Depreciation (typical Scottsdale STR worked example)
- $67,000 Est. Year-1 Tax Savings (federal + NIIT, no state)
- 84x Return on Study Cost
Want a number for your specific situation? Use the calculator, preset with property-type defaults to model your basis and bracket.
Who are Eastside tech cost segregation investors?
Bellevue and the broader Eastside cost-seg buyer pool is dominated by big-tech W-2 + RSU professionals:
- Microsoft (Redmond HQ, Principal/Senior Engineer through Partner level): $300K–$1.5M base + RSU
- Amazon Eastside (Bellevue offices: AWS, Alexa, Ring): $300K–$1.2M base + RSU
- Meta Bellevue, T-Mobile, Salesforce Bellevue, Snowflake: similar comp band
- Pre-IPO tech CFOs / executive teams (Stripe Seattle, OpenAI Seattle satellite, etc.)
The combined marginal-rate stack is the simplest of any major investor metro:
- Federal: 37%
- NIIT: 3.8%
- Washington state: 0% (no income tax)
- Combined: ~40.8%
That’s 10+ percentage points lower than NYC, Bay Area, or Boston Millionaire’s Tax. Less wedge per reclassified dollar, but Eastside tech RSU comp generally generates more cash for investment than any other metro, and the resulting deduction is straightforward federal-only math without state-conformity complications.
Verify with your CPA — combined-rate math depends on filing status and AGI thresholds for NIIT.
Why cost seg pays more if you live on the Eastside
The Eastside math is fundamentally different from CA/NY: instead of a high-bracket multiplier, the leverage comes from RSU liquidity timing. Microsoft and Amazon RSU vesting events generate large taxable income spikes, exactly the years when accelerated depreciation produces maximum value.
A typical $500K–$1M out-of-state STR reclassifies 24–32% of basis under permanent 100% bonus depreciation. At the Eastside combined bracket (~40.8%), every $1 of accelerated depreciation is worth ~$0.408 in Year-1 cash savings: useful, but less amplified than a CA or NY equivalent.
Where the Eastside investor wins: deploy the deduction in a high-RSU-vesting year to flatten the income spike. The strategy is less about “what’s my normal bracket” and more about “match the deduction year to the vesting cliff year.”
Earning W-2 income? The W-2 earner’s guide to cost segregation covers the seven-day rule, the participation tests, and a self-check for which test your hours meet.
Where do Eastside investors buy property?
Eastside investors flow capital to STR markets within a 2-3 hour flight:
- Scottsdale, AZ: Premier desert STR, $500K–$1.5M typical. Direct Seattle ↔ Phoenix flights. The default Eastside investor pick.
- Joshua Tree / Palm Springs, CA: Desert STR, design-driven, $400K–$900K. CA combined tax stacks on top for non-WA investors but Eastside buyer pays WA 0% on Year-1 deduction year.
- Big Bear, CA: Mountain/lake STR; CA-resident-only quirks don’t apply to WA investor.
- Sedona, AZ: Premium spiritual/wellness STR market.
- Maui, HI: Premium Pacific STR; direct flight from Seattle.
The Eastside-to-Scottsdale pipeline is the largest single capital-flow pattern visible in the order data: the desert-resort STR market thesis maps cleanly to tech W-2 with vesting-year timing.
A real Bellevue investor’s worked example
An Amazon Senior SDE earning $385K base + $200K RSU vesting in 2026, residing in Bellevue, buys a 3BR Scottsdale STR for $725K with $25K in immediate FF&E. After $180K in land, the $545K adjusted basis includes $65K in 5-year assets (pool equipment, hot tub, appliances, smart-home, theater system, decorative lighting), $22K in 7-year assets (custom furniture, themed bedrooms), and $77K in 15-year property (pool decking, hardscaping, outdoor kitchen, fencing, landscape lighting).
That’s $164K reclassified into accelerated depreciation in Year 1. At the Eastside combined bracket (~40.8%), federal+NIIT savings come to roughly $67,000, concentrated in the vesting year, perfectly timed to offset the $200K RSU income spike.
Who doesn’t qualify for cost segregation in Eastside?
REPS is structurally impossible for a full-time tech professional: 750+ hours + >50% personal services in real estate conflicts with on-call engineering or product-management hours. The STR exception (Reg. §1.469-1T(e)(3)(ii), 7-day average stay + 100-hour material participation) is the path.
The 100-hour material participation test is critical: an Eastside investor managing the property remotely via a property manager doesn’t automatically disqualify, but management hours must come substantially from the owner, not exclusively from the manager. Bellevue-to-Scottsdale’s 2.5-hour flight is short enough that quarterly on-site visits + active remote management generally clears the threshold.
Frequently Asked Questions
How much does a cost segregation study cost in Bellevue? For a representative $725,000 Bellevue investment property, a Cost Seg Smart study runs $995. Full pricing: $495 (under $300K), $895 ($300K–$700K), $995 ($700K–$1M), $1,295 ($1M–$1.5M), $1,595 ($1.5M–$2M), $1,995 ($2M–$3M), $2,495 ($3M–$4M), $3,995 ($4M–$6M), $5,995 ($6M–$8M), $7,995 ($8M–$10M). Commercial and 5+ unit multifamily studies start at $1,995; 2–4 unit multifamily from $795. All studies delivered in under one hour with the CPA-Ready Guarantee: full refund if your CPA can’t use the report.
RSU vesting hits in a single quarter, does cost seg help? Yes, that’s the highest-leverage scenario for Eastside investors. The accelerated depreciation deduction lands in Year 1 (placed-in-service year), which can be timed to align with a major vesting cliff. A $200K RSU spike + $164K of accelerated depreciation effectively cancels the federal+NIIT impact of vesting on $164K of that comp.
No WA state tax, why bother optimizing federal? Federal 37% + NIIT 3.8% = 40.8% combined is still the second-largest line item in most Eastside tech earners’ tax bill (after FICA + Medicare). On $164K of accelerated depreciation, that’s ~$67K in cash saved, far exceeding the cost of the study.
Is Bellevue different from Seattle for cost-seg purposes? Tax-wise, no: both are in Washington and pay 0% state. The difference is buyer profile: Bellevue/Redmond skews Microsoft + AWS; Seattle proper skews Amazon HQ + tech startups. The investment pattern (out-of-state STR) is identical.
Learn More About Cost Segregation
- What Is Cost Segregation?
- STR Losses Against W-2 Income
- Cost Segregation for STRs
- Cost Segregation in Seattle — Adjacent Seattle investor page
Cost segregation data for Bellevue, WA (Eastside) investors
The representative (median) outcome across 50 engine-modeled property scenarios matched to the Bellevue, WA (Eastside) investor profile. Year-1 savings computed at the metro combined bracket of 40.80%.
Representative scenarios modeled via Cost Seg Smart's proprietary
engine — IRS ATG-aligned methodology, industry-standard 2026 construction cost data base costs,
calibrated metro multipliers. n=50 fixtures matched to
Bellevue, WA (Eastside) investor profile. Not derived from individual
client returns. Methodology v1.0.0, generated
May 2026 (reproducible seed: bellevue-wa_v1_2026-05-17).
Year-1 savings computed at 40.80% combined (federal 37% + NIIT 3.8%; this state has no personal income tax, so there is no state-side adjustment). Confirm specifics with your CPA.
Tax law current as of July 2026. Federal: OBBBA restored 100% bonus depreciation under §168(k), permanent for property both acquired and placed in service after January 19, 2025 (property acquired or placed in service on or before that date remains under the prior 40% phase-down); 2026+ stays 100%. State conformity varies; verify with your CPA.
CPA use note: These figures estimate the size of the depreciation deduction. Whether the loss is usable in the current year depends on passive-activity rules, STR material participation, REPS status, entity structure, depreciable basis, and state conformity. Your CPA decides how and when it is applied. Specialty and site components (equipment, casework, docks, pools, arenas, tenant improvements, and similar) are only classified when you own them and they are included in the depreciable basis being studied.
How should Bellevue, WA (Eastside) investors choose a cost segregation provider?
For a Bellevue, WA (Eastside) investor buying a property in the $725,000 range, the choice of provider is a major controllable variable in the return. The IRS Audit Techniques Guide sets the quality characteristics an engineering-based study should meet — industry-standard construction cost data, MACRS classification, and component-level documentation — but it does not make every provider's work identical; rigor, cost, and turnaround still vary.
Traditional engineering studies often run several thousand dollars and can take several weeks, because they include on-site inspections, sales discovery calls, and scheduling overhead. The IRS Cost Segregation Audit Techniques Guide does not prescribe an on-site inspection as a standalone requirement; it sets out the quality characteristics of an engineering-based study — component-level classification, a documented and supportable cost derivation, and a clear audit trail — and describes how a physical inspection can contribute to meeting them.
Modern automated providers (such as Cost Seg Smart) deliver an engineering-based, IRS ATG-aligned study using property records, documents, photos, and recognized construction-cost data, typically from $495 and often the same day. For a Bellevue, WA (Eastside) investor at a high combined bracket, that cost and speed difference is meaningful. 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 owners who can provide closing documents and 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.
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. Straightforward residential studies are often delivered the same day and completed remotely; larger or more complex commercial studies take longer and may include an on-site observation.