Massachusetts estate tax, inheritance tax & probate costs

What the Massachusetts Estate Data Reveals

Massachusetts layers a state estate tax on top of the federal regime, exemption of $2,000,000 with rates from 0.8% to 16%, and spousal portability is not recognized. For estates above this state threshold but below the permanent federal $15M exemption, state law is the binding constraint, which is exactly the bracket most affluent households fall into. There is no separate inheritance tax, so beneficiaries receive their share without a second state-level deduction at distribution.

IRS Statistics of Income data show 250 federal estate tax returns filed by Massachusetts residents in the most recent available year (filing year 2023), reporting $6.71 billion in combined gross estate value. Net federal estate tax paid totaled $0.60 billion that year. Across the multi-year IRS SOI series above, Massachusetts averages roughly 218 taxable filings per year, with an effective federal rate on reported gross estates of about 8.6%.

Probate itself typically runs 9–18 months in Massachusetts (roughly 14 months on average), with court filing fees of $375–$1,000. Attorney fees are negotiated rather than statutory, so engagement letters and hourly-vs-flat structures matter more to the total bill. Massachusetts does offer a simplified small-estate track for estates under $25,000, which most families use to bypass full formal probate. Because Massachusetts has not adopted the UPC, probate practice can vary materially by county and judicial district. As a common-law (separate property) state, Massachusetts treats each spouse's holdings individually unless jointly titled, so titling choices drive what actually enters the probate estate.