The Massachusetts estate tax reaches far more families than the federal one, because its $2 million filing threshold is a small fraction of the federal exemption. The Department of Revenue’s Massachusetts Estate Tax Guide sets out the current rules, which this article walks through: who owes the tax, how the rate schedule and the $99,600 credit work together, what property counts toward the estate, and how the return is filed. It is one piece of estate planning in Massachusetts, which covers wills, trusts, and probate alongside the tax.
Who owes the Massachusetts estate tax
Massachusetts requires an estate tax return when a person who was domiciled in the state dies with a gross estate, plus adjusted taxable gifts, worth more than $2 million. This filing threshold applies to deaths on or after January 1, 2023. For deaths between 2006 and the end of 2022 the threshold was $1 million, as the Department of Revenue’s Massachusetts Estate Tax Guide explains.
The increase from $1 million to $2 million came from Chapter 50 of the Acts of 2023, the tax relief law enacted in October 2023. The same law added the $99,600 credit described in the next section. The threshold and the credit are also written into the estate tax statute at Mass. Gen. Laws ch. 65C, § 2A.
A nonresident who owned real estate or tangible personal property located in Massachusetts is measured the same way. The return requirement is based on the person’s total worldwide estate plus adjusted taxable gifts, even though Massachusetts taxes only the property located in the state.
How the tax is calculated
Massachusetts does not apply a single flat rate. The tax equals the former federal “credit for state death taxes,” computed from a graduated table (Table B) built into the Internal Revenue Code as it stood on December 31, 2000. Marginal rates in that table begin at 0.8% and climb to 16% on the largest estates, according to the Department of Revenue’s estate tax guide. The schedule is applied to the “adjusted taxable estate,” which is the taxable estate minus $60,000, and it produces no tax at all when the adjusted taxable estate is $40,000 or less.
For deaths on or after January 1, 2023, the calculated amount is then reduced by a credit of $99,600 under Mass. Gen. Laws ch. 65C, § 2A(f). That credit is not a round number by accident: it equals the Table B tax on a $2 million estate. An estate worth exactly $2 million therefore owes nothing, and the tax effectively reaches only the value above the threshold rather than the whole estate from the first dollar.
A separate change took effect for deaths on or after August 1, 2025, revising how out-of-state real and tangible property is removed from the calculation for a Massachusetts resident. The current line-by-line computation for each date-of-death period is set out in the Department of Revenue’s estate tax guide.
What property counts toward the estate
The gross estate is broad. It includes everything the decedent owned or had an interest in at death, valued at fair market value on the date of death or on the alternate valuation date six months later. Real estate, bank accounts, stocks and other securities, retirement accounts, business interests, and personal property all count, as the estate tax guide describes.
Several categories that people assume pass outside the estate are still counted. Life insurance proceeds are included even when they are payable to a named beneficiary rather than the estate. Property held jointly with right of survivorship, property in certain trusts, and assets over which the decedent held a general power of appointment are also part of the gross estate. Because Massachusetts measures the estate under the Internal Revenue Code in effect on December 31, 2000, the definitions do not track later federal changes.
Deductions reduce the taxable estate from that gross figure. Debts such as mortgages, funeral and administration expenses, property passing to a surviving spouse, and gifts to qualified charities are the common ones. Property left to a surviving spouse generally qualifies for a marital deduction, and a personal representative can elect to treat certain trust property as Massachusetts qualified terminable interest property (MA QTIP) so it qualifies for that deduction.
Filing Form M-706 and paying the tax
When a return is required, the personal representative files Form M-706, the Massachusetts Estate Tax Return, and pays any tax due within nine months of the date of death. The return and payment can be filed online through MassTaxConnect or mailed to the Department of Revenue.
Confirm a return is required
Add the gross estate and any adjusted taxable gifts. If the total is more than $2 million for a death on or after January 1, 2023, a return is required, per the Massachusetts Estate Tax Guide. Nonresidents use the same worldwide measure when they hold Massachusetts real or tangible property.
Assemble the supporting documents
Form M-706 is filed with a completed federal Form 706 (the July 1999 revision), the death certificate, the will and any trust, and letters of authority. A nonresident estate also files Form M-NRA, the Massachusetts Nonresident Decedent Affidavit.
File and pay within nine months
Both the return and the tax payment are due nine months after the date of death. Filing and paying through MassTaxConnect produces the estate tax closing letter and the lien release faster than mailing.
Request an extension if the estate needs more time
Filers receive an automatic six-month extension to file if at least 80% of the tax finally due is paid by the original due date. An extension of time to pay is requested separately on Form M-4768, and interest still accrues on any unpaid tax from the original due date.
Clear the estate tax lien on real estate
A lien attaches to the decedent’s Massachusetts real estate at death. Once the tax is paid, the Department issues a Certificate Releasing Massachusetts Estate Lien, which is needed to sell or transfer the property with clear title.
Missing the deadline carries real cost. The late filing penalty is 1% of the tax per month up to a maximum of 25%, and a separate late payment penalty of 1% per month, also capped at 25%, applies to tax reported as due, along with interest that runs from the original due date. These figures are set out in the Department of Revenue’s estate tax guide.
Ways an estate can fall below the threshold
Whether an estate crosses the $2 million line depends on how the property is titled and what deductions apply, and several rules described in the estate tax guide affect that math. Married couples often rely on the marital deduction, which shifts property to a surviving spouse without Massachusetts estate tax, while a MA QTIP election can preserve a deduction for property left in trust. Gifts to qualified charities are deducted from the estate as well.
Massachusetts imposes no separate gift tax, so lifetime gifts are not taxed when they are made. Those gifts are still added back as “adjusted taxable gifts” when testing whether the $2 million filing threshold is met, though the tax computation itself begins with the property owned at death rather than the gifts. Out-of-state real estate and tangible personal property are excluded from the Massachusetts tax calculation, even though their value counts when the filing threshold is measured.
These are the mechanics the statute and the estate tax guide describe, not a recommendation about any particular estate. How they apply turns on facts specific to each estate, and the interaction between the federal and Massachusetts rules is a common reason people planning larger estates consult a tax professional or an estate planning attorney.
Massachusetts compared with the federal estate tax
The federal estate tax uses a much higher exemption. A federal return is required only when the estate, increased by adjusted taxable gifts, exceeds $13,990,000 for a 2025 death or $15,000,000 for a 2026 death, according to the IRS estate tax overview. Most estates that owe Massachusetts tax owe no federal tax at all.
The two systems are independent. Massachusetts computes its tax from the federal credit table as it existed on December 31, 2000, and later changes to the federal exemption do not change the Massachusetts result. An estate can be well under the federal threshold, owe no federal estate tax, and still owe a Massachusetts estate tax because it holds more than $2 million.
Frequently asked questions
Does Massachusetts have an inheritance tax?
No. Massachusetts has an estate tax, which is paid by the estate before assets are distributed, not an inheritance tax charged to individual heirs based on what they receive. A handful of other states impose inheritance taxes on beneficiaries, but Massachusetts is not one of them.
Is the tax only on the amount above $2 million?
Not directly, though the result is close. The tax is figured on a graduated table applied to the whole taxable estate, and the $99,600 credit then cancels the tax that would apply to the first $2 million, under Mass. Gen. Laws ch. 65C, § 2A(f). Because that credit equals the table’s tax on a $2 million estate, an estate at exactly $2 million owes nothing, and only value above the threshold produces tax.
Do I have to file anything if the estate is under $2 million?
No Massachusetts estate tax return is required when the gross estate plus adjusted taxable gifts is $2 million or less, per the Department of Revenue guide. When the estate includes Massachusetts real estate, the personal representative can record an affidavit in the registry of deeds stating that the estate is below the filing threshold, which releases the estate tax lien on that property.
How is the estate valued for the tax?
Property is reported at fair market value on the date of death, or on the alternate valuation date six months later if that date is elected. The gross estate includes real estate, financial accounts, securities, retirement assets, business interests, and life insurance proceeds, even when the insurance is payable to a named beneficiary.
What if the estate cannot pay the tax within nine months?
An estate can request an extension of time to pay on Form M-4768 for a reasonable period, generally up to six months at a time, granted for undue hardship. Interest continues to accrue on the unpaid tax from the original nine-month due date regardless of any payment extension.