A group of Democratic-led states is advancing proposals to increase taxes on million-dollar earners, prompting debate over whether the policies will boost revenue or drive wealth migration.

The initiatives, led by New York Governor Kathy Hochul and California Governor Gavin Newsom, would impose new or higher taxes on residents earning above certain thresholds. New York's proposal targets earners above $5 million, while California's would affect those above $2 million.

The moves follow a pattern of progressive taxation that has intensified in blue states over the past several years, with advocates arguing that the wealthiest residents should contribute more to state services.

What the Left Is Saying

Progressive Democrats and advocacy groups supporting the measures argue that wealthy residents benefit disproportionately from public infrastructure and services, and therefore should pay their fair share.

State Senator Liz Krueger of New York said the proposals represent a matter of fiscal responsibility. "Our schools, our transit, our healthcare systems — these depend on investments that must be funded," Krueger said in a statement supporting the measures.

The Economic Policy Institute, a left-leaning think tank, has argued that wealth concentration poses democratic risks and that progressive taxation helps maintain economic mobility.

Additionally, supporters note that the highest-income residents in states like New York and California benefit from concentrations of financial services, tech industries, and professional networks that were built with public infrastructure investments.

What the Right Is Saying

Republicans and some business groups argue that higher taxes on high earners will prompt migration to lower-tax states, reducing overall revenue and harming working-class residents.

House Republican Conference Chairwoman Elise Stefanik called the policies "economic malpractice" that would "send jobs and revenue to red states."

The Tax Foundation, a center-right tax policy organization, has warned that annual state revenue losses from millionaire departures could exceed billions of dollars in affected states.

Former New York City Councilman Joe Lhota, a Republican, wrote that the policies would "ultimately hurt the very people they claim to help" by reducing employment in financial services and other high-paying sectors.

Conservatives have also pointed to data from states like Illinois, which lost population and corporate headquarters following tax increases, as evidence of the risks involved.

What the Numbers Show

According to U.S. Census Bureau data, New York and California have experienced population declines in recent years, though economists debate the relative contribution of tax policy versus housing costs and other factors.

New York's top marginal income tax rate stands at 10.9%, while California's reaches 13.3% — both the highest in the nation among states with income taxes.

The Manhattan Institute reported that between 2020 and 2025, New York saw a net outflow of residents earning above $1 million annually, with approximately 7% of the state's millionaire population relocating to Florida or Texas.

However, a study by the left-leaning Institute on Taxation and Economic Policy found that millionaire tax flight is often overstated, noting that wealthy residents consider factors beyond taxes including family ties, career opportunities, and quality of life.

California's Legislative Analyst's Office reported that the state's 2024 millionaire tax contributed approximately $3.8 billion in additional revenue, though the full-year impact of recent proposals remains under review.

The Bottom Line

The debate over millionaire taxation in blue states reflects a broader tension between progressive fiscal policy and economic competitiveness. Both sides point to data supporting their positions, with outcomes likely dependent on broader economic conditions and federal policy.

Supporters argue the policies fund essential services and represent democratic values of progressive taxation. Opponents contend that revenue losses from migration will ultimately harm middle-class residents and undermine the states' fiscal positions.

What to watch: Upcoming legislative sessions in both New York and California will determine whether the current proposals become law, and revenue projections over the next two fiscal years will provide data points for evaluating their impact.