New Hampshire is one of the few states with no personal income tax, making it attractive for traders. However, the state imposes two separate business taxes: the Business Profits Tax (BPT) and the Business Enterprise Tax (BET). Traders with Trader Tax Status (TTS)—especially those using Section 475 mark-to-market (MTM)—need to understand whether these state taxes apply to them.
No Personal Income Tax — and Repeal of Interest & Dividends Tax
Historically, NH imposed a 5% Interest & Dividends (I&D) Tax on investment income over certain thresholds. The rate was gradually reduced (down to 3% in 2024) and the tax was fully repealed effective January 1, 2025. Importantly, capital gains have historically been exempt from any NH personal income tax — they were never subject to the I&D tax. This leaves BPT and BET as the state’s primary business-level taxes.
Understanding NH BPT and BET
| Tax | Who Must File | Rate / Threshold |
|---|---|---|
| BPT | “Business organizations,” including sole proprietors engaged in business activity in NH | 7.5% of taxable business profits; filing required if gross business income > $109,000 |
| BET | Business enterprises with NH activity (corporations, LLCs, partnerships, proprietorships) | 0.55% on compensation, interest, and dividends paid; filing required if gross receipts or enterprise value base > $298,000 |
BET paid may be credited against BPT, so the two taxes interact.
Are Traders Considered a “Business” Under NH Law?
New Hampshire law defines a business organization broadly, including any proprietorship “organized for gain or profit” and “carrying on business activity” within the state (RSA 77-A:1). A trader who:
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Qualifies for Trader Tax Status (TTS) under IRS rules,
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Maintains a home office in NH, and
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Trades frequently, continuously, and with a profit motive
is likely engaged in a business for NH purposes. But there is a gray area: TTS traders are not explicitly categorized by NH law, and states with business taxes often take a broad view of “business activity.” The use of Schedule C or a formal trading entity strengthens the argument that it is a business.
Section 475 MTM vs. Capital Gains: Why It Matters
| Feature | Section 475 MTM Trader | Non‑MTM Trader (Capital Gains) |
|---|---|---|
| Federal Reporting | TTS expenses on Schedule C; ordinary gains/losses on Form 4797 (Section 475 MTM) | TTS expenses on Schedule C (if qualified); capital gains/losses on Form 8949 & Schedule D |
| NH BPT Exposure | Yes: Profits treated as business income | Likely lower risk, but not clear‑cut: Gains are capital, but NH could still argue they are business profits if the trader meets TTS criteria |
| NH BET Exposure | Possible if payroll, interest, or dividends > $281K | Unlikely unless thresholds are met |
| Audit Risk | Higher — NH sees ordinary income as business profits | Still present — states could argue that frequent trading with Schedule C expenses constitutes a business |
| Federal QBI Deduction | Yes: Section 199A 20% deduction may apply to MTM ordinary income | No: Capital gains are excluded from QBI |
Key Takeaway
Electing Section 475 MTM can increase your NH tax exposure, because it converts gains into ordinary business income subject to BPT. However, it also unlocks the 20% Qualified Business Income (QBI) deduction federally, which is not available on capital gains.
Still, even TTS capital gains could eventually be swept into NH’s definition of “business profits” if the Department of Revenue takes a broader view. Traders exist in a gray area—between passive investors and licensed brokers—and treatment may evolve as states look for additional tax revenue.
Planning Tips for NH Traders
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Model Both Scenarios: Compare federal benefits of MTM (wash sale relief, ordinary loss deductions, QBI deduction) against potential NH BPT cost.
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Evaluate Whether You Need TTS: If trading expenses are minimal and you don’t need MTM, skipping TTS can help avoid NH business tax exposure.
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Recognize the Gray Area: Even without MTM, claiming TTS with significant Schedule C expenses could attract state scrutiny.
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Maintain Documentation: If you claim TTS, keep detailed records—trade logs, hours devoted, business plan.
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Separate Trading vs. Investing: Use distinct accounts to avoid confusion.
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Monitor BET Thresholds: If you have payroll, interest, or dividends > $281K, BET likely applies regardless of MTM election.
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Consider a State Ruling: For high‑income traders, requesting a private letter ruling from the NH Department of Revenue Administration (DRA) can provide certainty.
Policy Watch: Future State Guidance
States like New Hampshire, Los Angeles (City), and Washington are actively seeking revenue sources and often define “business activity” broadly. As trading businesses grow, tax agencies could clarify that TTS capital gains fall under business profits for BPT or similar taxes. Traders should stay tuned for guidance and consider proactive planning, including requesting rulings or modeling exposure.
Bottom Line
For traders in New Hampshire, the absence of a personal income tax doesn’t necessarily mean zero state tax liability. Large MTM traders may owe BPT, and even non‑MTM traders with TTS could be at risk as states apply broad definitions of business activity. BET is less common unless the compensation or enterprise value base is significant.
Planning ahead—especially around the Section 475 election—can minimize surprises and optimize both federal and state outcomes. And if you don’t need TTS or MTM, staying classified as an investor may be the simplest way to steer clear of NH business taxes entirely.
Robert A. Green, CPA, is CEO of GreenTraderTax.com and author of “Green’s 2025 Trader Tax Guide.”


