Is New York’s Millionaire Tax Driving the Wealthiest Out?

New York City is already generating more than $60 billion in annual tax revenue, with a substantial portion of this revenue coming from its wealthiest residents. High earners contribute a substantial share, accounting for a significant portion of the city's income tax revenue. However, Democratic mayoral nominee Zohran Mamdani’s proposal to raise taxes by 2% on those earning over $1 million annually aims to raise an additional $10 billion each year. This new initiative is designed to fund various social programs, including fare-free public buses, universal childcare, and rent freezes. However, there’s a significant risk associated with this proposal. If New York’s high earners decide to relocate, this tax base could rapidly shrink, diminishing the very revenue needed to fund these programs. As Mamdani’s proposal targets the ultra-wealthy, many worry that the incentive for high earners to leave the city could outweigh the potential benefits of these new taxes.

The Big Apple’s Taxing Dilemma

Mamdani’s plan is grounded in equity. He argues that in a city where economic inequality continues to widen, the wealthiest should bear more of the fiscal burden. His proposed surcharge targets those earning over $1 million annually, a relatively small pool that already supplies a large share of the city’s income tax haul. Critics, however, have begun calling this a "millionaire tax," which, as a financial fallacy, confuses the distinction between taxing income and wealth. A true "millionaire" tax would refer to individuals with a net worth of at least $1 million, not just those earning that much annually. This distinction is crucial because wealth is inherently more difficult to tax, especially in the U.S., where capital gains often remain unrealized and untaxed.

Source: Bloomberg

Supporters say these additional funds could transform everyday life for millions of residents. But critics warn that taxing the ultra-wealthy has its limits, especially in a city where high earners can easily change their official residence without changing much about their lifestyle. And in a post-pandemic world, where hybrid and remote work are here to stay, that’s more realistic than ever.

Higher Taxes, Higher Stakes

The fear of a mass migration of millionaires due to higher taxes is not without merit. A study in the American Economic Journal found that when states introduced new income taxes, tax collections increased, but mostly because fewer wealthy individuals remained to shoulder the burden. A similar 2016 study in the American Sociological Review showed that states with millionaire taxes saw significant outflows of high earners.

For New York City, this migration threat is compounded by geography. High earners don't need to move far to escape city taxes. Moving to nearby areas such as Long Island or Connecticut could allow wealthy individuals to avoid New York City taxes while maintaining their lifestyle. This ease of exit, coupled with the fact that many high-income individuals already own secondary homes, increases the likelihood that a small percentage of these taxpayers might choose to leave, resulting in a significant loss of revenue.

States Are Watching

New York is not alone in targeting high earners for new revenue. Massachusetts recently implemented a millionaire tax, exceeding expectations by generating an additional $2 billion in revenue. Illinois and California have also explored similar proposals, with some policymakers viewing these initiatives as potential models. However, these experiments are still under scrutiny, as the long-term effects largely depend on how mobile wealthy taxpayers are and whether other states respond with more competitive tax regimes.

New York's proposal will be carefully watched, especially in light of the growing trend of states revising their tax codes to attract or retain high earners. As discussed in our previous article, Will a New Millionaire Tax Generate $400 Billion in Revenue?, this shift could play a pivotal role in shaping national tax policy.

Smart Moves to Beat the Tax Man

For professionals advising high-net-worth clients, it is essential to prepare for potential tax hikes in New York. Whether Mamdani’s proposal becomes law or not, here are several strategies to consider:

• Residency Planning: Clients with homes in multiple states may consider shifting their primary domicile. Ensure they understand the 183-day rule and assist them in gathering the necessary evidence to support their new residency claims.
• Income Structuring: Review how clients are allocating earned, passive, and business income. Explore strategies to reduce exposure to local taxes while ensuring full compliance with state and city tax laws.
• Transaction Timing: For clients planning liquidity events such as selling a business or exercising stock options, the timing of these transactions relative to potential tax hikes can make a significant difference.
• Audit Readiness: If clients are relocating, ensure their documentation is thorough and complete. New York's Department of Taxation is known for aggressively auditing residency claims, so solid proof is essential.

Tax professionals have a unique opportunity to guide their clients through these evolving tax laws. By helping clients plan ahead, tax advisors can ensure that they are prepared for whatever changes may come down the pipeline.

The Bottom Line

Mamdani’s proposed tax hike could bring in much-needed revenue to New York City, but it comes with a significant risk. The city’s wealthiest residents, already a vital source of income for the city’s budget, could decide that the cost of staying outweighs the benefits. As such, tax professionals should proactively help their clients navigate these changes, offering strategic advice on residency planning, income structuring, and transaction timing. Whether or not the proposed tax hike passes, these preparations are crucial for ensuring that clients remain tax-compliant and financially sound in the face of shifting policy. Stay informed on the latest trends and insights! Subscribe to our newsletter for expert analysis and updates on key tax topics.

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