Millionaire's Tax
Massachusetts 4% surtax on personal income over $1 million, effective 2023. On top of the 5% base rate.
Since 2023, Massachusetts imposes a 4% surtax on personal income above $1 million per year. Combined with the 5% base rate, the marginal rate above $1M is 9%. The surtax applies to MA-resident income and to MA-source income for non-residents. The surtax has driven a wave of departures, and the MA Department of Revenue has expanded its residency-audit program in response.
Related terms
NHR (Non-Habitual Resident, Portugal)
Portugal's preferential tax regime for inbound residents, offering 10 years of favorable treatment. Closed to new applicants in 2024 but with grandfathering.
Lump-sum taxation (forfait fiscal)
Swiss regime that taxes qualifying foreigners on a deemed lifestyle expense rather than actual income.
Ordinary residence (Ireland)
Irish concept: a stickier 3-year residency status. Continues for 3 years after departing Ireland.
Impatriate regime (Italy)
Italian tax break: a 50–60% reduction in taxable employment income for qualifying inbound workers, for a fixed five-year period.
Passive residency (Andorra)
Andorra's residence permit for people who live there without working locally (residència sense activitat lucrativa), granted against a qualifying investment in Andorran assets.
Homestead exemption
A property-tax reduction for owner-occupied primary residences. Filing for it in your new state is part of every domicile-change checklist.
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