States Proposing Wealth Taxes Guide – Wealth taxes—levies on an individual’s net worth rather than annual income—are gaining traction in several progressive U.S. states. These proposals target billionaires and ultra-high-net-worth individuals to generate revenue for public services, education, and healthcare amid budget pressures and growing wealth inequality.
Unlike traditional income or capital gains taxes, a true wealth tax assesses the total value of assets (stocks, bonds, businesses, art, etc.) minus liabilities, often annually or as a one-time measure. As of April 2026, no state has a recurring annual net-worth tax in effect, but multiple blue states are advancing ambitious proposals. This guide breaks down the latest developments, targeted states, potential impacts, and practical steps for U.S. residents.
What Are Wealth Taxes and Why Are States Proposing Them Now?
Wealth taxes differ from income taxes by focusing on accumulated assets rather than yearly earnings. Proponents argue they address disparities, especially as unrealized capital gains (paper profits in stocks) go untaxed until sold. States cite needs to fund healthcare, education, and infrastructure while offsetting revenue losses from high-earners relocating to low-tax states like Florida or Texas.
Critics highlight administrative challenges (valuing illiquid assets like private businesses or art), constitutional issues, and risks of capital flight. Many proposals include “exit taxes” or residency rules to retain revenue. As of 2026, at least ten states are exploring wealth, exit, or related high-wealth taxes, driven by post-federal policy shifts and state budget gaps.
Key States Proposing Wealth Taxes in 2026
Several states lead efforts with true net-worth or mark-to-market (unrealized gains taxed as income) proposals. Here are the most active:
California’s 2026 Billionaire Tax Act: One-Time 5% Levy on Net Worth Over $1 Billion
California’s proposed 2026 Billionaire Tax Act (ballot initiative, A.G. File No. 2025-024) stands as the nation’s highest-profile wealth tax push. It would impose a one-time 5% tax on the net worth of individuals residing in California on January 1, 2026, with net worth exceeding $1 billion.
- What’s taxed: Stocks, businesses, investments, and most assets (real estate, pensions, and retirement accounts are excluded).
- Payment: Due in 2027; optional spread over five years with added costs.
- Revenue: Expected to generate tens of billions of dollars temporarily, with 90% directed to public healthcare.
- Status: Signature gathering underway for the November 2026 ballot. Governor Gavin Newsom opposes it, citing risks to competitiveness.
Analysts note potential ongoing income tax losses if billionaires relocate, plus tens of millions in annual administrative costs.
Hawaii’s Wealth Asset Tax: 1% on Net Worth Over $20 Million
Hawaii’s Senate Bill 313 (and companion HB 1235) proposes a 1% annual wealth asset tax on state net worth exceeding $20 million. Assets include real estate, stocks, bonds, cash, and collectibles.
- Timeline: If enacted, taxes could begin as early as 2030.
- Status: Carried over to the 2026 legislative session after advancing through Senate committees in 2025. It remains under active consideration.
This lower threshold would affect more individuals than California’s billionaire-only approach and aims to promote tax fairness in the island state.
Illinois’ Mark-to-Market Tax Act: Taxing Unrealized Gains for Billionaires
Illinois Senate Bill 3376 (Extremely High Wealth Mark-to-Market Tax Act) targets residents with net assets of $1 billion or more. It requires annual recognition of gains or losses as if assets were sold at fair market value on December 31, taxed under the state income tax.
- Phase-in: Partial taxation in the first year (2026), with full application later and loss carryforwards allowed.
- Status: Introduced February 4, 2026, and referred to committee. It faces significant constitutional hurdles due to Illinois’ flat income tax requirement.
This mark-to-market approach functions as a de facto wealth tax on appreciation without directly taxing principal.
Other States Exploring Wealth or High-Wealth Taxes
While pure wealth taxes remain proposals, related measures proliferate:
- Washington: Recently passed a 9.9% surtax on income over $1 million (not a net-worth tax). High-profile departures, including executives, followed.
- Michigan: “Invest in MI Kids” ballot initiative seeks a 5% surtax on high earners for education funding.
- Rhode Island, Virginia, Connecticut, Pennsylvania, and New York: Active bills for income surtaxes, capital gains hikes, or passive income taxes targeting millionaires and billionaires.
Many states already impose “millionaires taxes” (surtaxes on income over $1 million), such as in Massachusetts (4% surtax), Maryland, and Minnesota (1% on net investment income over $1 million).
Potential Impacts on High-Net-Worth Individuals and Businesses in the USA
These proposals could significantly affect residents in targeted states:
- Tax Burden: A California billionaire with $2 billion in qualifying assets might owe $50 million upfront.
- Migration Risks: Proposals often coincide with “exit tax” discussions; early signals show wealthy individuals and companies relocating to no-income-tax states.
- Economic Effects: Reduced investment, business relocations, and lower future income tax revenue could offset gains. Valuation disputes and compliance costs would rise.
- Broader U.S. Residents: Non-residents generally escape state wealth taxes, but multi-state owners or those with ties must monitor residency rules carefully.
Federal context includes Sen. Elizabeth Warren’s reintroduced Ultra-Millionaire Tax Act (2% on net worth over $50 million), though it faces slim passage odds.
Legal and Constitutional Challenges Facing State Wealth Taxes
State wealth taxes often clash with constitutions (e.g., Illinois’ flat tax, Washington’s prior income tax ban). Valuation of non-liquid assets, double taxation risks, and federal preemption concerns add complexity. Courts have historically scrutinized such measures, and many proposals remain stalled.
How to Prepare If You Live in a State Proposing Wealth Taxes?
- Review Residency: Document ties; consider relocating before key dates (e.g., California’s Jan. 1, 2026 snapshot).
- Asset Planning: Explore trusts, gifting, or charitable strategies (consult professionals).
- Monitor Legislation: Track ballot initiatives and bills via state legislative sites.
- Consult Experts: Work with tax attorneys and CPAs familiar with multi-state rules.
- Diversify: High-net-worth individuals may accelerate sales or restructure holdings.
Proactive planning now can mitigate future liabilities.
The Future of Wealth Taxes in the United States
As of April 2026, wealth tax proposals remain fluid—primarily in California, Hawaii, and Illinois—with outcomes depending on voter approval, legislative progress, and legal challenges. These efforts reflect a national debate on taxing extreme wealth, but implementation hurdles persist. U.S. residents, especially in high-tax states, should stay informed and seek personalized advice to navigate this evolving landscape. For the latest updates, check official state legislative trackers and nonpartisan analyses from sources like the California Legislative Analyst’s Office and Tax Foundation.
This guide provides general information only and is not tax or legal advice. Tax laws change rapidly—consult qualified professionals for your situation.