Does QSBS Avoid Washington’s New 9.9% Income Tax? (Yes — For Now)

Key Takeaways

• Washington tax bases on federal AGI, excluding QSBS gains
• Section 1202 exclusion shields up to $15M per issuer after 2025
• Potential legislative add‑back could tax QSBS after 2027
• Non‑QSBS income still triggers 9.9% tax above $1M threshold
• No current guidance; monitor Washington Dept. of Revenue rulings

Pulse Analysis

Washington’s new 9.9% income tax, slated for January 1, 2028, targets household adjusted gross income (AGI) exceeding $1 million. Because the tax’s base is federal AGI, any gain excluded under Section 1202—such as qualifying small‑business stock (QSBS)—does not flow into the state’s calculation. This structural alignment means that a founder who sells QSBS with a $12 million gain can legally report zero Washington taxable income, avoiding a potential $1 million state liability. The benefit is immediate for high‑growth startups that meet the post‑OBBBA five‑year holding period and the $15 million per‑issuer cap.

Despite the clear statutory language, the protection is not immutable. In 2026, legislators introduced SB 6229 and HB 2292 to force an add‑back of federally excluded QSBS gains, though the bills died. The absence of Department of Revenue guidance leaves room for interpretive risk, especially as Washington’s courts have previously embraced creative tax characterizations. Moreover, neighboring Oregon has already decoupled from Section 1202, signaling a broader trend of states targeting QSBS revenue. Stakeholders should therefore track the 2027 and 2028 legislative sessions, as any amendment could retroactively subject previously excluded gains to the 9.9% rate.

Practical planning now centers on confirming QSBS eligibility, meticulously tracking the holding period, and leveraging exclusion multiplication through gifting or trusts to expand the $15 million cap across multiple taxpayers. Investors must also recognize that non‑QSBS income—salary, bonuses, or other capital gains—remains subject to the state tax once AGI surpasses $1 million. By building a strategy that assumes the current exemption but remains flexible for potential legislative changes, founders can protect millions of dollars of upside while staying compliant with evolving Washington tax policy.