Debate begins on surtax segregation, impacts

Horowitz also expects the policy’s implementation will lead to roughly half a billion dollars in lost income tax revenue “as taxpayers who leave the state or engage in tax avoidance will end up skirting both the millionaires tax and the state income tax.

Questions continue to swirl around millionaire tax

cSPA estimates there were 21,000 state taxpayers in 2019 — the last year for which they had complete data — with incomes of more than $1 million, amounting to 0.6% of all households. Yet, these households earned 22% of all taxable income in Massachusetts.