Status (as of September 20, 2026): Washington's individual income tax remains law, effective January 1, 2028, at 9.9%, unless voters repeal it or the courts strike it down. Initiative 645 is certified for the November 3, 2026 ballot and would repeal that income tax if it passes. Plan as though the tax arrives on schedule; treat repeal or a court win as a change of circumstances, not the baseline plan. For the broader map, see the Washington Tax Planning Guide and the income-tax overview.
The question for 2026 and 2027 is not whether you can stay under a Washington AGI ceiling. There is no pre-2028 Washington income-tax ceiling. The question is whether recognizing income sooner improves your combined federal-and-state result once you account for brackets, payment timing, liquidity, and the possibility that the law changes.
Short answer
Acceleration is not automatically beneficial. Moving ordinary income into 2026 or 2027 can avoid the new Washington income tax that begins in 2028 — but only if the income would otherwise have been recognized after the tax starts, and only after you compare the federal cost of recognizing it earlier. A higher federal bracket, earlier cash tax, lost deferral, or an unnecessary recognition if the tax is later repealed can erase or reverse the Washington savings. Model both years together; do not optimize for the Washington line alone.
What changes in 2028
Beginning January 1, 2028, Washington imposes an individual income tax at 9.9% (ESSB 6346 / chapter 82A RCW). When computing Washington taxable income under that regime, a $1,000,000 standard deduction applies from Washington base income (spouses or state registered domestic partners share one combined $1 million). That deduction is part of the 2028-and-after tax computation. It is not a 2026 or 2027 AGI ceiling, and it does not create a pre-2028 income limit under $1 million.
Before 2028, there is no tax under the new Washington income-tax law because the tax has not begun — not because income is below $1 million. Separately, Washington’s capital gains excise tax (chapter 82.87 RCW) already applies. How the two regimes coordinate through adjustments and credits is covered in Washington capital gains tax vs. income tax; do not treat long-term capital gain timing as interchangeable with ordinary-income timing. Federal brackets, NIIT, AMT, and cash-flow constraints apply in every year you recognize income.
Which recognition events can move
Only some events are timing-flexible, and each carries different federal consequences:
- NSO exercise. The bargain element is generally ordinary income at exercise (subject to company rules, vesting, and liquidity). Whether accelerating helps depends on residency and sourcing, other income, deductions and credits, and the federal cost of recognizing the spread earlier — not an automatic Washington tax savings at the 9.9% rate. Detail: stock option exercise timing.
- ISO exercise. Regular tax often waits for a disqualifying disposition; the immediate exposure is frequently AMT on the spread. Do not treat an ISO exercise as the same ordinary-income timing lever as an NSO exercise.
- RSUs. Taxable income generally tracks settlement (delivery), not merely vesting. Accelerating vesting does not necessarily accelerate taxable settlement.
- Deferred compensation and §409A. Plan permission alone does not make early payment lawful. Acceleration is tightly limited; see deferred compensation and Washington’s income tax.
- Roth conversions. Conversion income is ordinary in the conversion year. Pre-2028 conversion avoids the new Washington income tax because that tax has not begun; it still raises federal ordinary income now. See Roth conversions before 2028.
- Business sales and pass-throughs. Focus on taxable pass-through income and ordinary components of a deal (compensation, earnouts taxed as ordinary income, depreciation recapture). Taxable pass-through income can arise without a cash distribution. Long-term capital gain sits on a separate base with a capped same-year capital-gains-tax credit; see the vs. article rather than assuming identical combined tax before and after 2028.
- Installment timing. Accelerating remaining payments can pull gain forward. Whether that helps depends on character, other income, and the time value of paying earlier.
A qualified example
The following numbers illustrate the new Washington income tax only.
Assumptions for this illustration: full-year Washington resident; $400,000 of ordinary income annually; an additional $2,000,000 of fully taxable ordinary income that can lawfully be recognized either before 2028 or in 2028; no other Washington modifications; deductions only the applicable $1 million standard deduction; no credits.
- Recognition before 2028: no tax under the new Washington income-tax law because the tax has not begun — not because income is below a threshold. Do not assign a fictitious Washington income-tax deduction to pre-2028 years.
- Recognition in 2028: $2.4 million − $1 million = $1.4 million of Washington taxable income; 9.9% = $138,600.
This illustrates the new Washington income tax only. It does not establish matching federal tax in both scenarios, and it does not establish $138,600 of net total-tax savings. Federal tax, payment timing, liquidity, and investment effects require a separate comparison.
When acceleration may cost more
Unnecessary or poorly sequenced acceleration can leave you worse off even if the Washington line looks better on a spreadsheet:
- Higher federal brackets (and related phaseouts or NIIT) from stacking income into one year.
- Earlier payment — you lose the time value of deferral even when the Washington rate would later be higher.
- Liquidity risk — funding an exercise, conversion tax, or deal acceleration without cash can force secondary sales or borrowing at a bad time.
- Repeal or changed circumstances — if voters repeal the income tax (I-645 is on the November 3, 2026 ballot; track status on the I-645 tracker) or a court strikes it down, income you pulled forward may have been taxed federally for no Washington benefit. Do not treat that outcome as harmless. Separately, do not assert categorical conclusions about how I-645 interacts with capital-gains-tax collection; follow the tracker and primary sources.
The planning posture remains: the tax is law effective January 1, 2028 unless repealed or struck down — plan on that schedule, and still price the cost of being wrong.
Decision checklist
- Identify which recognition events you can lawfully move — and which you cannot (§409A, plan terms, company blackouts, deal counterparties).
- Separate ordinary-income timing from long-term capital-gain timing; model chapter 82.87 and the income-tax credit rules where gains are involved.
- Compare combined federal-plus-Washington tax, cash timing, and liquidity for “recognize before 2028” vs. “recognize in 2028+” — not the Washington line alone.
- Do not invent a pre-2028 $1 million AGI ceiling under the income-tax standard deduction.
- Revisit the model if I-645 passes, a court enjoins the tax, or your residency or deal calendar changes.
- Coordinate with counsel and a CPA before year-end structures that have hard deadlines (for example, timely elections tied to transfers or exercises).
Related reading
- Stock option exercise timing before Washington’s 2028 income tax
- Deferred compensation and Washington’s income tax
- Roth conversions before 2028
- Washington capital gains tax vs. income tax
- Initiative 645 tracker
- Washington’s income tax overview
This post is for informational purposes only and does not constitute legal or tax advice. Consult a qualified professional about your specific circumstances.
