One of the messages of doom that were widely broadcast about what might happen should Zohran Mamdani win the mayoral election in New York City was that wealthy people might leave the city in droves because of the higher taxes he was promising to levy on them in order to fund some of the social programs that would benefit ordinary people. Such scare tactics to keep the wealthy happy are not uncommon. Some might view the departure of these people as not a bad thing, since wealthy people who begrudge paying more in taxes (which they can well afford) to benefit others are pests whom we would be better off without. Cristobal Young, a sociologist at Cornell University, and others have looked into this claim and find that this threat to move lacks evidence in support.
I research whether high earners actually move when their taxes go up. My colleagues and I have analyzed millionaire taxes in New Jersey and California, the migration of Forbes billionaires globally and decades of IRS data tracing where Americans with million-dollar incomes live.
Top earners are often thought of as “mobile millionaires” who are ever searching for lower-tax places to live. In reality, they’re often reluctant to leave the places where they built their careers and raised their families.
…The first fact is simple: Millionaires have low migration rates.
Mobility in America is highest among people who are still searching for their economic place in life. Workers who earn the lowest wages move across state lines at relatively high rates, about 4.5% per year, often in search of more affordable housing. People making $1 million-plus a year move only half as often: Just 2.4% of them pack up each year.
When millionaires do move, it rarely appears to be for tax reasons.
…Overall, only about 15% of millionaires who move end up with a lower tax bill. That shows the rich are willing and able to move for tax reasons. But because only about 2.4% of millionaires move each year – and only a fraction of those moves reduce their taxes – overall tax migration ends up being a small fraction of a small fraction. Not never, but not often.

