Washington has no personal income tax and no corporate income tax. The state's Business & Occupation (B&O) Tax under RCW Ch. 82.04 is calculated on gross receipts, not federal taxable income. Depreciation is not a component of the B&O calculation. STR investors take the federal §168(k) deduction in full with zero Washington add-back. Compare Washington to every other jurisdiction in our all-50-states conformity guide.
Modeled on a $150,000 federal §168(k) deduction on a Washington STR property.
Why Washington Individuals Take the Full Federal Deduction
Washington is one of nine US jurisdictions with no personal income tax. The Washington State Constitution has historically been interpreted to preclude a graduated income tax on individuals under the "uniformity clause" (Wash. Const. Art. VII, §2), and the legislature has never enacted a general income tax. As a practical matter, no state-return depreciation modification exists for Washington STR investors reporting rental income.
This puts Washington in the same practical position as Florida, Texas, and Nevada for individual STR investors: the Year-1 §168(k) write-off you claim on federal Schedule E is exactly what you keep.
The Washington B&O Tax — Why It Doesn't Affect §168(k)
Washington's Business & Occupation (B&O) Tax under RCW Ch. 82.04 applies to every business entity operating in Washington, including individuals with STR income. It is a gross-receipts tax, not an income tax. The tax is calculated on Total Gross Receipts multiplied by the rate for the business's classification.
STR rental income is taxable under the Retailing classification at 0.471% on gross receipts (short-term stays of less than 30 days are subject; long-term rentals of 30+ days are exempt as sales of real property use). Depreciation deductions are not part of the calculation. Whether an STR entity claims $150,000 in bonus depreciation or zero, the B&O Tax owed is identical. Small STR operators may qualify for the small-business B&O credit that reduces or eliminates the tax below certain gross receipt thresholds.
Washington also imposes a separate state and local Retail Sales Tax and a Convention and Trade Center Tax on STR nightly stays. These are consumption taxes remitted by the operator but ultimately paid by the guest, and they have no interaction with income tax depreciation.
Worked Example — $150,000 Federal Deduction on a Leavenworth Chalet
Assume an STR investor buys a fully-furnished 3-bedroom Bavarian-themed chalet in Leavenworth, closes 2026, and identifies $150,000 in bonus-eligible 5-year and 15-year assets through a photo-analyzed cost-segregation report.
| Line | Federal | Washington (Individual) | Washington B&O |
|---|---|---|---|
| Year 1 §168(k) deduction | $150,000 | No state return / no depreciation entry | No effect (B&O on gross receipts) |
| Year 1 tax at federal 37% / WA 0% / B&O 0.471% | $55,500 saved | $0 WA state tax owed | Applies to gross rental receipts only |
| Reporting requirement | Schedule E | None (no return) | B&O return (Excise Tax return, monthly/quarterly/annually) |
The Washington STR investor keeps the full $55,500 federal Year-1 savings on a $150,000 bonus deduction, pays zero Washington income tax, and files no state depreciation schedule. The B&O Tax owed on gross rental receipts is unrelated to the bonus depreciation calculation. Run any Washington address to see the combined federal-and-state math on your specific property.
Washington STR Markets Where Bonus Depreciation Compounds Fastest
The Year-1 write-off is largest where the personal-property share of purchase price is highest. In Washington that concentrates in destination and resort markets with high-amenity, high-FF&E properties:
Leavenworth — the Bavarian-themed alpine town is Washington's densest STR market. Purpose-built chalets with hot tubs, mountain-view decks, gas fireplaces, and full FF&E commonly run 30–35% bonus-eligible. A $850k Leavenworth chalet can produce a Year-1 write-off of $255k–$298k.
The San Juan Islands (Friday Harbor, Eastsound, Lopez Village) — waterfront and view homes with high-quality finishes and outdoor build-outs run 28–33% bonus-eligible. Ferry-limited market with premium pricing and consistent occupancy.
The Olympic Peninsula (Port Angeles, Sequim, La Push, Forks) — 28–32% on furnished rental homes near the national park. Twilight tourism keeps the market steady.
Lake Chelan and Lake Wenatchee waterfront — 30–34% bonus-eligible when docks, boat lifts, seawalls, and lakeside outdoor entertainment build-outs are included. The 15-year land-improvement bucket is unusually large.
Whidbey Island (Coupeville, Langley, Freeland) — 27–31% on furnished waterfront and view homes. Growing STR market with strong shoulder-season occupancy.
Seattle STR-permitted properties — the city's 2018 licensing regime caps STR properties per operator. Permitted units in Ballard, Capitol Hill, Queen Anne, and West Seattle run 26–30% bonus-eligible when fully furnished. Land ratio in central Seattle is higher than in resort markets — this is exactly where DepreciMax's photo-analyzed report earns its keep, catching the difference between an eyeballed 25% and an itemized 30% bonus-eligible share.
Long Beach, Ocean Shores, and the Washington Coast round out the Washington STR corridor at slightly lower price points but similar amenity density.
The Statute Explained
Washington's tax framework combines constitutional-level protection for individual income with an entity-level B&O Tax that sidesteps depreciation entirely. The state constitution's uniformity clause (Wash. Const. Art. VII, §2) has been consistently interpreted by the Washington Supreme Court to preclude a graduated personal income tax, and no flat income tax has ever been enacted. RCW Ch. 82.04 imposes the B&O Tax on business gross receipts by classification without regard to federal taxable income or depreciation.
OBBBA (P.L. 119-21) restored 100% federal bonus for property acquired and placed in service after January 19, 2025. For Washington STR investors the restoration flows through federal at full strength with zero state offset.
How Washington Compares to Oregon and California
Washington's tax posture is materially better for STR investors than either of its West Coast neighbors. Oregon conforms to federal §168(k) but taxes rental income at a 9.9% top marginal rate — meaning the federal deduction flows through cleanly in Year 1, but ongoing rental profits face Oregon income tax every subsequent year that Washington investors avoid entirely. California decouples from §168(k) at both the individual and corporate level with a 13.3% top marginal rate, creating a Year-1 state add-back of ~$19,950 on a $150,000 federal deduction that Washington investors escape.
Compared to the other no-income-tax states, Washington's B&O Tax on gross rental receipts is similar in mechanic to Nevada's Commerce Tax (though Nevada's $4M annual receipt threshold is much higher than any B&O exemption). Texas's Margin Tax also operates on gross receipts, so the entity-level treatment is comparable. Use the state conformity tool to run Washington side-by-side with any other state.
What This Means for Your Washington STR Purchase Decision
For an STR investor evaluating a Leavenworth chalet, an Orcas Island waterfront home, or a Lake Chelan view lot, Washington's zero-income-tax posture is a pure win. Three takeaways:
First, the federal Year-1 bonus deduction is fully preserved. On a $150,000 federal bonus, a Washington investor keeps the full $55,500 federal savings at 37% and pays nothing to the state of Washington in income tax.
Second, the B&O Tax on gross rental receipts is a modest cost of doing business — typically $500–$1,500 annually on a single high-earning STR — but it has no interaction with the depreciation math. Register with DOR, get your UBI, file the return, pay tax on gross receipts. Simple.
Third, Washington STR investors compound the Year-1 §168(k) benefit against zero state income tax on ongoing rental profits every subsequent year. Compared to an investor in Oregon (9.9%) or California (13.3%), the Washington position pays off in every year of the hold, not just Year 1.
Before writing an offer on any Washington STR placed in service after January 19, 2025, run the address to get a line-item breakdown of the actual bonus-eligible share.
Analyze a specific Washington property
Run any Washington STR listing through DepreciMax's $99 property report — line-item finish classification closely calibrated to a formal cost seg study, includes state-specific conformity math.
Frequently Asked Questions
Does Washington conform to federal §168(k) bonus depreciation?
The question is largely moot in Washington. The state has no personal income tax and no corporate income tax. Washington's Business & Occupation (B&O) Tax under RCW Ch. 82.04 is calculated on gross receipts, not on federal taxable income, so depreciation of any kind — bonus, MACRS, straight-line — is not a component of the B&O Tax calculation. STR investors take the full federal §168(k) deduction with zero state modification.
Does the Washington B&O Tax affect my STR bonus depreciation?
No. The B&O Tax is a gross-receipts tax classified by business activity. STR rental income is taxable under the Retailing classification at 0.471% on gross receipts (short-term stays under 30 days are subject to the tax; long-term rentals are exempt). Since the tax is on gross receipts, depreciation deductions have no effect on the amount owed.
Does Washington's 2022 capital gains tax affect bonus depreciation?
No, not directly. Washington's 7% excise tax on long-term capital gains over $262,000 (2024 threshold, indexed) applies only to gain on the sale of qualifying capital assets. Ordinary rental income and depreciation deductions are outside its scope. Real estate is generally excluded from the tax.
How does Washington compare to Oregon and California for STR investors?
Washington beats both Oregon and California on the STR bonus depreciation math. Oregon conforms to federal §168(k) but taxes rental income at 9.9% top marginal, so ongoing rental profits face a state tax that Washington does not impose. California decouples from §168(k) at both the individual and corporate level with a 13.3% top marginal rate, creating a large Year-1 state add-back Washington investors avoid entirely. On a $150,000 federal bonus, a California investor loses ~$19,950 in Year-1 California tax that Washington investors keep.
Which Washington STR markets benefit most from the 100% bonus restored under OBBBA?
The Bavarian-themed town of Leavenworth is Washington's densest STR market, with purpose-built alpine chalets running 30–35% bonus-eligible when fully furnished. The San Juan Islands (Friday Harbor, Eastsound, Lopez) and the Olympic Peninsula (Port Angeles, Sequim, La Push) run 28–33%. Lake Chelan and Lake Wenatchee waterfront properties reach 30–34%. Seattle STR-permitted properties run 26–30%.
What's the Year-1 write-off on a $850,000 Leavenworth chalet under OBBBA?
Expect a Year-1 write-off of approximately $255,000 to $298,000 on a fully-furnished Leavenworth chalet at $850,000 purchase price, assuming a 30–35% bonus-eligible share. At a 37% federal marginal rate that is $94,000 to $110,000 in Year-1 cash tax savings for a Real Estate Professional or Materially Participating STR investor — with no Washington state offset.
Do I need to register with Washington for my STR bonus depreciation?
Every Washington business including STR operators must register with the Washington Department of Revenue and obtain a Unified Business Identifier (UBI). The B&O Tax return is filed monthly, quarterly, or annually depending on receipt volume. Depreciation is not a line item on the return — you report gross receipts and pay tax on that amount. Federal §168(k) depreciation is claimed on your federal Schedule E as usual.
Every state's §168(k) position, in one place
Interactive map, sortable table, and deep-dive guide for each of the 51 jurisdictions — post-OBBBA verified.
See the 50-state map →Washington authority: Wash. Const. Art. VII, §2 (uniformity clause); RCW Ch. 82.04 (Business & Occupation Tax); RCW 82.04.050 (Retailing classification, STR taxability); Washington Department of Revenue B&O guidance (dor.wa.gov). Federal authority: IRC §168(k), as amended by the One Big Beautiful Bill Act (P.L. 119-21) restoring 100% bonus depreciation for property acquired and placed in service after January 19, 2025. Nothing in this article is tax advice. Consult a CPA who specializes in real estate before making investment decisions based on state-conformity projections.