The Rising Tide of Millionaire and Wealth Taxes: A 2026 National Overview
Wealth and millionaire taxes are seeing a resurgence in the national spotlight. Across the country, state legislatures are debating whether high earners, luxury real estate investors, and billionaires should shoulder a larger portion of the tax burden to fund critical sectors like education, transportation, and healthcare. While some of these proposals have already been codified into law, others are moving toward ballot boxes, and a few have stalled in the legislative process.
We have compiled a clear roundup of the most significant millionaire and wealth tax conversations happening right now. If you are navigating high-income tax planning or managing luxury assets, here is where the landscape stands.
California: The Billionaire Tax Act and the 2026 Ballot
California is currently considering some of the most aggressive tax measures in the nation. Proponents of the 2026 Billionaire Tax Act have successfully gathered the signatures needed to place a one-time 5% wealth tax on the November 2026 ballot. This measure would apply specifically to individuals with a net worth exceeding $1 billion and is projected to generate tens of billions for healthcare programs. While supporters see this as a necessary revenue stream, critics—including Governor Gavin Newsom—warn that such measures could incentivize wealthy residents to leave the state.
Maine: Implementing the New Millionaire Surcharge
Maine has officially transitioned from proposal to policy. In April of this year, Governor Janet Mills signed a budget package that introduces a new 2% surcharge on individual income over $1 million. For those of you filing jointly, the threshold for this surcharge is set at $1.5 million. This tax is retroactive to January 1, 2026, and is expected to raise approximately $100 million in its first year to support public infrastructure and programs.
Illinois: High-Earner Tax Proposal Stalls
In Illinois, the latest push for a millionaire tax has lost its momentum for the time being. A proposed constitutional amendment aimed to allow voters to decide on an additional 3% tax on income over $1 million. However, the measure failed to secure enough support in the Illinois House, making it highly unlikely that voters will see this on the November 2026 ballot.
New York: Targeting Luxury Second Homes with the Pied-à-Terre Tax
New York’s current fiscal debate focuses more on luxury real estate than direct income. Governor Kathy Hochul has proposed a pied-à-terre tax specifically for second homes in New York City valued at $5 million or more. If approved, the city would levy an annual surcharge on ultra-wealthy nonresident owners. Supporters view this as a way to capture revenue from investment properties, while critics are concerned about valuation disputes and potential legal challenges.
Washington: New Tax Signed Amidst Legal Uncertainty
Washington has long been known as a state without a traditional income tax, but a major shift is underway. Governor Bob Ferguson signed a 9.9% tax on income above $1 million in March 2026. Set to take effect in 2028, the law is intended to rebalance the state's tax code. However, opponents have already initiated legal battles, arguing that the state constitution treats income as property, which could restrict this type of taxation.
Massachusetts: The Fair Share Surtax as a Case Study
Massachusetts remains a key test case for the impact of millionaire taxes. Since 2023, the state has enforced an additional 4% surtax on taxable income above the annual threshold. Revenue from this surtax is earmarked for transportation and education. While the collections have been substantial, economists continue to debate whether the tax is influencing the migration patterns of high earners.
Oregon: A Potential Wealth Tax on the Horizon
Oregon may be the next state to bring a wealth tax to its voters. The proposed initiative, known as The Very Rich Pay Their Fair Share Act, would tax assets including property, stocks, and business interests held by the state's wealthiest residents. Organizers are currently working to qualify the measure for the November 2026 ballot.
Vermont: Proposed Increases for Top Tax Brackets
Lawmakers in Vermont are weighing significant tax hikes for the top 1% of households. One active proposal would create a new top income tax bracket with a rate as high as 13.3% on income exceeding $586,000 for joint filers. If this passes, Vermont would hold one of the highest top marginal rates in the United States.
Connecticut: Advocacy for Billionaire Tax Reforms
While Connecticut has not yet enacted a new wealth tax this year, advocates are increasing the pressure. Protests on Tax Day called for a billionaire tax and broader structural reforms. Although the state has not moved forward with these proposals yet, progressive lawmakers continue to float ideas targeting high-value property and net worth.
Maryland: Exploring a Billionaire Wealth Tax
Maryland legislators have introduced House Bill 1238, which would create a one-time tax on residents with a net worth above $1 billion. The proceeds are intended for a state stabilization fund. As of now, the proposal remains in the legislative phase and has not been enacted into law.
Rhode Island: The “Taylor Swift Tax” on Vacation Homes
Rhode Island has successfully enacted a high-end property surcharge, popularly nicknamed the “Taylor Swift Tax” due to the high-profile celebrity properties in the state. Starting July 1, 2026, the state will apply a 0.5% annual surcharge on the portion of assessed value above $1 million for specific non-owner-occupied residences. Properties used as primary residences or those rented out for more than 183 days a year are exempt.
New Jersey: Expanding the Mansion Tax Structure
New Jersey’s millionaire-tax focus is deeply integrated into its real estate market. In 2025, the state expanded its mansion tax, moving from a flat 1% to a tiered system. Transactions over $3.5 million are now taxed at 3.5%, with specific rates set for sales between $2 million and $3.5 million.
Hawaii: Stalled Property and Income Tax Hikes
Hawaii lawmakers considered several aggressive tax proposals in 2026, including new taxes on capital gains and high-value real estate. There was also a push in Hawaiʻi County to increase property taxes on homes valued above $4 million to support housing initiatives. However, many of these state-level hikes stalled in the Senate.
Federal Level: Reintroducing the Ultra-Millionaire Tax
On the national stage, Senator Elizabeth Warren and her colleagues have renewed their push for the Ultra-Millionaire Tax Act. This federal proposal suggests a 2% annual tax on household net worth exceeding $50 million, with an extra 1% surcharge for those above $1 billion. While it faces significant political resistance, it remains a central part of the national conversation regarding tax equity.
Today, the term “millionaire tax” covers a diverse set of fiscal strategies, including:
- Income surtaxes on high earners
- Annual wealth taxes on net worth
- Mansion taxes on high-value real estate sales
- Second-home taxes and luxury property surcharges
As state tax policies continue to evolve, the impact on your financial health depends heavily on your residency, what you earn, and the assets you own. If you are concerned about how these changing laws might affect your tax strategy, we can walk you through it step by step.
State tax policy can change quickly. This article is current as of the date of publication, April 29, 2026.
Beyond the immediate financial impact of these surcharges, the shift toward taxing the stock of wealth—rather than just the flow of income—introduces significant administrative hurdles. While Maine and Massachusetts focus on annual earnings, states like California and Oregon are exploring the taxation of total net worth. This transition requires a complex valuation process for illiquid assets. For a business owner in the Pacific Northwest or an entrepreneur in the Silicon Valley area, this could mean appraising private equity interests, intellectual property, and even art collections annually, regardless of whether a sale has occurred. The Oregon proposal specifically mentions business interests and stock options, which are notoriously difficult to value and can fluctuate dramatically based on market sentiment or industry-specific cycles.
The "mansion taxes" and second-home surcharges in New Jersey, Rhode Island, and New York are also reshaping local real estate markets. In New Jersey, the tiered system creates a "price bunching" effect where property values near the threshold are under intense negotiation. Sellers often find themselves in a position where staying just below the 3.5 million mark is more beneficial than selling slightly above it due to the sharp increase in tax liability. For those of you managing a portfolio of luxury properties, these surcharges are no longer just closing costs; they are a permanent fixture in the calculation of your annual carrying costs and total return on investment. In Rhode Island, the requirement to rent a property for at least 183 days to avoid the 0.5% surcharge is forcing many owners to choose between private enjoyment and fiscal efficiency.
The legal challenges unfolding in Washington state highlight a deeper constitutional tension. Many state constitutions were written with the assumption that income is property and must be taxed uniformly. By creating a high-earner bracket, states are testing the limits of these nineteenth-century legal frameworks. If Washington’s 9.9% tax survives its court battles, it may serve as a legislative blueprint for other states that currently lack a traditional income tax but are facing significant budget shortfalls. On the other hand, a victory for the opponents could mean that wealth-based taxation requires a full constitutional amendment, a process that is much more difficult to achieve and requires broad public support.
For individuals under pressure from shifting state laws, the primary challenge is often the lack of clarity regarding residency and asset location. We are seeing an increase in state-level audits that specifically target high-net-worth individuals who have recently moved. These "exit audits" look at everything from where you keep your primary bank accounts to the number of days spent in the state. Proper documentation of your primary residence and the precise timing of capital gains realization have become essential parts of modern tax planning. As these millionaire taxes evolve, the burden of proof is increasingly placed on the taxpayer to demonstrate that they fall outside the reach of a new surcharge or wealth tax initiative.
Maintaining a proactive stance is the only way to navigate these complexities without facing unexpected liabilities. We are keeping a close watch on the legislative calendars in Vermont, Connecticut, and Maryland to identify potential changes before they are finalized. Whether it is preparing for the administrative demands of a billionaire tax filing or adjusting your real estate holdings to mitigate luxury surcharges, we can walk you through the process step by step to ensure your financial plan remains robust in a changing landscape.
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