Key Risks for Washington Traders
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Possible Washington B&O tax on realized trading gains.
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Potential inability to offset realized trading losses.
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No trader-specific DOR safe harbor or formal guidance.
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Broad statutory definition of “investments” under RCW 82.04.4281 potentially reaching many financial instruments.
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No formal incorporation of federal Trader Tax Status (TTS) or Section 475 MTM rules into Washington B&O law.
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Significant uncertainty regarding when active trading becomes “engaging in business.”
Washington Traders Still Face Significant Uncertainty
As of May 2026, Washington still has not issued trader-specific guidance, safe harbors, or examples addressing whether active traders are “engaging in business” for Washington Business & Occupation (B&O) tax purposes.
Since our original May 30, 2025 article analyzing the Antio decision and newly enacted ESHB 2081, traders have continued waiting for meaningful clarification from the Washington Department of Revenue (DOR) regarding:
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Trader Tax Status (TTS),
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Section 475 mark-to-market (MTM),
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trading entities,
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and proprietary trading activity.
The legislature specifically directed DOR to issue examples and guidance distinguishing personal investments from taxable business activity, but trader-specific examples still have not been published.
DOR previously indicated that additional investment-income guidance may be forthcoming in 2026, although trader-specific guidance still had not been released as of this article’s publication date.
Practitioners should monitor whether DOR releases additional guidance or examples addressing active proprietary trading.
As a result, Washington-resident traders continue to face substantial uncertainty regarding potential B&O tax exposure.
This 2026 update is not driven by major new statutes or rulings. Rather, it reflects the continued absence of trader-specific guidance, the evolution of practitioner analysis after Antio and ESHB 2081, and the growing realization that Washington’s existing statutes already contain potentially harsh tax mechanics if active trading is ultimately treated as “engaging in business.”
The core uncertainty is no longer whether Washington’s statute can produce harsh results if B&O applies to traders — the statute already clearly can. The unresolved question is where Washington draws the line between non-taxable personal investing and taxable business activity.
The concern remains serious because Washington’s B&O tax is imposed on the privilege of doing business and measured on gross income rather than net income. RCW 82.04.080 expressly includes gains realized from trading while disallowing deductions for losses.
Background: Antio and ESHB 2081
The current uncertainty developed after the Washington Supreme Court’s Antio decision and the legislature’s subsequent enactment of ESHB 2081.
Antio significantly narrowed the availability of the investment income deduction by emphasizing the incidental-investment requirement for taxpayers whose primary business is not investment activity. ESHB 2081 then revised RCW 82.04.4281 by adding a bright-line incidental test and specific deduction rules for certain vehicles.
For a taxpayer whose entire activity is proprietary trading, DOR could argue that investment or trading income is not incidental because trading is the taxpayer’s primary activity.
ESHB 2081 also revised and clarified portions of the investment income deduction rules, including:
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bright-line “incidental” investment tests,
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definitions of “investments,”
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Collective Investment Vehicle (CIV) deduction provisions,
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Family Investment Vehicle (FIV) deduction provisions,
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and mandatory DOR rulemaking requirements.
ESHB 2081 also added a 5% bright-line incidental-investment framework, although that framework may provide limited practical relief for taxpayers engaged primarily in proprietary trading activities.
However, neither Antio nor ESHB 2081 directly resolved how Washington intends to treat professional-style active traders.
The Core Statutory Problem Remains Unresolved
Washington law continues to provide that:
RCW 82.04.080 defines “gross income of the business” to include “gains realized from trading in stocks, bonds, or other evidences of indebtedness” and provides that such gross income is measured “without any deduction … on account of losses.”
Washington’s B&O statute can therefore impose tax on realized trading gains while denying any offset for realized trading losses, if the trading activity is treated as “engaging in business.”
For example:
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Trader realizes $2 million in gains during the year.
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Trader also realizes $2.3 million in losses.
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Federal tax result: $300,000 net trading loss.
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Potential Washington B&O position: tax imposed on $2 million of realized gains.
No formal DOR guidance currently resolves this issue for traders.
Simple Illustration of Potential B&O Exposure
For illustration only, using an approximately 1.5% Service and Other Activities B&O rate, potential Washington B&O tax could be:
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Realized trading gains: $2,000,000
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Realized trading losses: ($2,300,000)
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Federal net trading result: ($300,000) loss
Potential Washington B&O calculation if trading is treated as “engaging in business”:
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Taxable realized gains: $2,000,000
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Approximate B&O tax rate: 1.5%
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Potential Washington B&O tax: $30,000
Actual B&O classification, rate, surtaxes, thresholds, and legislative changes should be confirmed for the taxpayer’s specific year, activity, and income level.
Under the conservative interpretation of RCW 82.04.080, realized trading losses may not offset realized trading gains for B&O purposes.
“Gains Realized” Is Not “Gross Proceeds,” But Loss Netting Still Appears Disallowed
Importantly, the statute refers to “gains realized,” not “gross proceeds.”
The better reading is that “gains realized” should mean transaction-level realized gains (sale proceeds minus basis for the position sold), rather than total broker “proceeds.”
However, the same statutory definition still denies any deduction “on account of losses,” creating the risk that loss positions do not offset gain positions in the B&O measure.
In practice, reconstructing Washington-specific gain-only reporting from broker records and tax software could be administratively burdensome.
Accordingly, the conservative interpretation remains:
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transaction-level realized gains may count,
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but realized losses may not offset aggregate realized gains.
Washington Specifically Allows Netting for Financial Institutions — But Not for Most Traders
RCW 82.04.080(2) separately provides that financial institutions determine trading gains on a “net annualized basis.”
That distinction matters because it demonstrates that Washington knows how to draft explicit netting provisions for defined taxpayers while leaving the broader rule in RCW 82.04.080(1) unchanged.
For this netting rule, RCW 82.04.080(2) ties “financial institution” to persons within the scope of DOR rules under RCW 82.04.460(2). Typical individual traders, trader-owned LLCs, and S corporations trading only proprietary capital generally should not assume they qualify.
Personal Investing, Professional Trading, and Dealer Activity Are Not Necessarily Treated the Same
Washington law and DOR guidance increasingly suggest that there are different categories of activity.
Traditional personal investing
The legislature and DOR both indicate that traditional personal investing generally is not “engaging in business.”
DOR guidance currently states:
“Persons who are not engaging in business are not subject to B&O tax on their income earned from investing. This category includes individuals who are not engaged in business and who invest their own personal assets.”
The legislature likewise stated in post-Antio findings language that:
“amounts received by individuals from personal investments are generally not considered amounts received from engaging in business and therefore are not subject to the business and occupation tax.”
A key distinction is whether the income is taxable in the first place. If an individual’s investing activity is not “engaging in business,” the income should be outside B&O without needing an investment-income deduction. By contrast, if the activity is treated as a business, the taxpayer must then analyze RCW 82.04.080 and any available deductions under RCW 82.04.4281.
Professional-style active trading
The unresolved issue is where professional-style active trading falls on the spectrum.
Washington still has not clearly addressed situations involving:
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full-time day trading,
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high-volume proprietary trading,
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algorithmic trading,
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Section 475 MTM elections,
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trading entities,
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or institutional-style trading operations.
If a proprietary trading activity is treated as a business, RCW 82.04.4281 may not provide relief because the trading income may not be incidental, and typical trader-owned entities generally will not satisfy the CIV or FIV definitions.
Traditional securities dealer activity
By contrast, activities involving customers, market-making, underwriting, investment advisory services, or broker-dealer operations are much more likely to constitute traditional business activity subject to B&O tax.
This customer-facing distinction also matters federally: IRC Section 475 defines a securities dealer by reference to transactions with customers, whereas proprietary traders typically rely on Section 475(f) trader elections rather than dealer status.
No Published Ruling on Trader Tax Status or Section 475
As of May 2026, we are not aware of any published:
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Washington DOR binding ruling,
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tax determination,
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Excise Tax Advisory,
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administrative determination,
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or court decision
specifically addressing:
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IRS Trader Tax Status (TTS),
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Section 475 MTM elections,
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trading LLCs or S corporations,
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proprietary day traders,
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or algorithmic/high-frequency traders.
Recent practitioner commentary discussing Antio and ESHB 2081 similarly notes that DOR has not issued trader-specific rulings or safe harbors.
Traders and practitioners may eventually seek formal clarification from Washington DOR through ruling requests, interpretive guidance requests, or future rulemaking comments. However, any guidance issued could be highly fact-specific and may materially affect how Washington treats active trading activities going forward.
Washington Does Not Formally Incorporate Federal TTS or Section 475 Rules
Importantly, Washington B&O law does not expressly adopt or incorporate the federal Trader Tax Status framework or Section 475 MTM rules.
The legal issue remains governed by Washington’s own “engaging in business” standards and the statutory B&O tax base under RCW 82.04.080.
Federal trader elections and business-style operational facts may nevertheless be persuasive — though not controlling — in a Washington “engaging in business” analysis.
Factors that DOR or a court could potentially weigh include:
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electing Section 475 MTM,
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operating through a trading LLC or S corporation,
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maintaining a dedicated office,
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employing staff or contractors,
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operating sophisticated algorithmic infrastructure,
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or conducting institutional-style trading operations.
However, Washington has not issued formal guidance addressing these specific configurations.
Washington’s Definition of “Investments” Is Extremely Broad
The revised statutory definitions in RCW 82.04.4281 are broader than many traders may realize.
The statute’s definition of “investments” includes:
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securities,
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trading account assets,
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options,
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futures contracts,
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forward contracts,
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foreign currency transactions,
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derivative instruments,
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and commodities.
One nuance: RCW 82.04.080’s gross-income phrase refers to gains from trading in stocks, bonds, or other evidences of indebtedness, while RCW 82.04.4281’s revised “investments” definition is broader for investment-income deduction purposes. DOR could still view broad trading-account income through the investment-income framework, but the statutory provisions are not identical.
As a result, the Washington B&O issue potentially extends beyond stock traders and may also affect:
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futures traders,
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options traders,
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forex traders,
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traders in crypto-linked derivatives or commodity-like instruments, depending on the instrument and classification,
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and systematic algorithmic traders.
DOR Guidance Suggests Trading Frequency Alone May Not Be Determinative
DOR web guidance appears to suggest that trading frequency alone may not determine whether a person is engaged in business for B&O purposes.
DOR guidance instead focuses more heavily on traditional dealer-type activities such as:
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making markets,
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underwriting,
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serving customers,
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providing investment advice,
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holding customer funds,
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or operating as a broker-dealer.
However, nothing in the current DOR guidance directly addresses full-time proprietary day traders or systematic algorithmic traders, which remains a major unresolved gap.
Practitioners should confirm current DOR webpage language because online guidance can change without formal rulemaking.
CIV and FIV Deduction Provisions Generally Do Not Fit Typical Trading Entities
ESHB 2081 added or revised deduction provisions for Collective Investment Vehicles (CIVs) and Family Investment Vehicles (FIVs), but most trader-owned entities likely do not qualify.
CIV limitations
A CIV must generally:
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derive at least 90% of gross income from investments,
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hold passive investment assets for investors,
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have investment decisions made by another person serving as manager or advisor,
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and accept unrelated persons as investors.
Typical single-trader LLCs and S corporations generally do not satisfy those requirements.
FIV limitations
FIV status is generally limited to:
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estates,
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qualifying trusts,
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Section 529 plans,
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and Section 530 arrangements.
Most trading LLCs and S corporations do not qualify.
Conservative Planning Considerations for Washington Traders
Until Washington issues clearer guidance, traders may wish to evaluate whether their facts make the activity resemble an active trading business.
Potentially higher-risk facts could include:
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operating through a trading LLC or S corporation,
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electing Section 475 MTM,
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claiming federal trader business expenses, including Schedule C reporting for individuals,
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maintaining a dedicated trading office,
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employing staff or contractors,
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operating sophisticated trading infrastructure,
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or engaging in extremely high-volume systematic or algorithmic trading.
By contrast, potentially lower-risk facts may include:
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personal investment accounts,
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no trading entity,
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no affirmative federal trader posture, where consistent with the taxpayer’s actual facts,
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no Section 475 election,
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no Schedule C reporting for trader business expenses,
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longer holding periods,
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and investment-oriented activity.
Some traders using an LLC taxed as a partnership or an S corporation may consider temporarily ceasing trading activity through the entity and leaving it idle while awaiting additional Washington guidance or legislative developments later this year, or resuming trading in an individual account.
That approach may preserve the entity structure while reducing current facts that could support a Washington “engaging in business” position.
However, suspending trading activity prospectively would not necessarily eliminate potential exposure for prior years if Washington later asserts that the entity had previously been engaging in business.
Washington’s nexus and B&O rules can also apply to entities with Washington contacts even when the entity itself is organized outside Washington, so multi-state structures require careful analysis.
Section 475 Revocation Timing Matters
A trader that made a valid Section 475(f) election generally must follow IRS procedural guidance to revoke it, typically by filing the revocation statement by the original due date, without extensions, for the prior-year return corresponding to the year of change.
For calendar-year taxpayers, revocation affecting 2026 treatment generally required action by approximately April 15, 2026, subject to weekend, holiday, and IRS procedural rules.
Entity taxpayers and fiscal-year taxpayers should confirm the applicable unextended return due date and procedural statement requirements.
If a taxpayer no longer qualifies as a trader in securities or commodities for federal purposes, the continued application of a prior Section 475(f) election becomes a federal tax issue requiring careful analysis. Taxpayers should not assume Section 475 treatment automatically continues merely because a prior election was made.
Given the uncertainty surrounding Washington B&O tax exposure, traders should carefully evaluate Section 475 election and revocation timing with qualified tax counsel.
Recommended Conservative Posture
Until Washington provides clearer trader-specific guidance, conservative planning may include:
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carefully evaluating whether TTS and Section 475 benefits outweigh Washington B&O exposure,
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reducing facts that resemble institutional trading businesses,
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avoiding unnecessary business formalities,
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evaluating whether continued trading activity inside entities remains appropriate,
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and modeling potential B&O exposure assuming realized gains may be taxable without loss netting.
These considerations are risk-management factors, not a recommendation to disregard actual business facts or take inconsistent federal and state positions.
Washington has periodically offered voluntary disclosure and compliance programs for taxpayers with unresolved B&O exposure. Traders concerned about prior-year exposure should evaluate available options with qualified state tax counsel based on the rules in effect at that time.
Watch Item
If DOR’s future investment-income guidance includes examples for high-volume individual traders, single-member trading LLCs, S corporation trading entities, or Section 475 traders, those examples could materially change the risk analysis described in this article.
Primary Authorities Referenced
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RCW 82.04.080
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RCW 82.04.4281
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RCW 82.04.460(2)
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Antio, LLC v. Washington Department of Revenue
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ESHB 2081 (2025), codified in relevant part in RCW 82.04.4281
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Washington Department of Revenue investment income guidance
Final Thoughts
Washington law already contains the potentially harsh mechanics:
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trading gains included in gross income,
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no deduction for losses,
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and unresolved standards for determining when active trading constitutes “engaging in business.”
At the same time, the legislature acknowledged that personal investing by individuals generally is not “engaging in business” and directed DOR to issue additional guidance and examples.
Unfortunately, Washington still has not clearly explained where active trading falls on that spectrum.
Until DOR issues formal trader-specific rules, examples, or safe harbors, Washington residents and trading entities with Washington nexus engaged in high-volume or professional-style trading should treat potential B&O exposure as a material risk requiring careful planning and modeling.
We will continue monitoring DOR guidance and developments closely.
Disclaimer
This article is for educational purposes only and does not constitute legal or tax advice. Traders should consult qualified tax counsel regarding Washington B&O tax exposure, Trader Tax Status, Section 475 elections, entity planning, and multi-state nexus issues.



