You read somewhere that if your estate is worth one dollar more than $2 million, Massachusetts taxes the whole thing. So you added up the house in Hingham, the 401(k), the life insurance, and your half of the joint account, landed north of $2 million, and started bracing for a six-figure bill.
That is not how it works, and it has not worked that way since January 1, 2023.
The claim appears on a lot of pages. It was close to true before 2023. It is not true now, and the difference is the difference between owing nothing and owing what you fear you owe.
What does the $2 million threshold actually trigger?
It triggers a filing obligation. Not a tax.
The Department of Revenue puts it plainly: for decedents dying on or after January 1, 2023, the personal representative must file a Massachusetts Estate Tax Return, Form M-706, if the gross value of the estate plus adjusted taxable gifts exceeds $2,000,000. Before 2023 that number was $1,000,000.
Crossing $2 million means a return is due. Whether money is due is a separate calculation, and for many South Shore estates the answer is zero.
Two different measurements do two different jobs, and conflating them is where the confusion starts.
Gross estate plus adjusted taxable gifts decides whether you file. That is everything: real estate, retirement accounts, life insurance proceeds even when paid straight to a named beneficiary, jointly held property, trust assets. It is not reduced by your mortgage.
The amount subject to Massachusetts estate tax decides what you pay. It starts from the gross estate and subtracts the deductions Massachusetts allows: debts including the mortgage, funeral and administration expenses, the marital deduction, charitable gifts.
An estate with a $2.4 million gross value and a $500,000 mortgage has to file. It will very likely owe nothing.
How does the $99,600 credit work?
Massachusetts does not have an exemption that shields the first $2 million. It has a credit, which gets to a similar place by a different route.
General Laws chapter 65C, section 2A(f) says that for decedents dying on or after January 1, 2023, a credit is allowed against the estate tax equal to the amount of that tax, except that the credit cannot exceed $99,600.
Read that twice, because it does two things. The credit can wipe out the tax entirely, but never creates a refund: if the computed tax is $40,000, the credit is $40,000 and you owe nothing, and the unused $59,600 goes nowhere. And once the computed tax passes $99,600, the credit stops growing, so everything above that is payable.
Section 2A(g) adds a backstop: estates of decedents dying on or after January 1, 2023 are not required to pay any tax if the value of the federal taxable estate is not more than $2,000,000.
So $99,600 is not arbitrary. It is precisely what the rate table produces at a $2 million taxable estate, reverse-engineered so the tax zeroes out exactly at the threshold. That is the opposite of a cliff. It is a hinge.
How is the tax actually computed?
Massachusetts does not use a rate schedule of its own. It borrows a retired federal one.
The tax equals the credit for state death taxes that would have been allowable under Internal Revenue Code section 2011 as that section stood on December 31, 2000. DOR calls the schedule Table B. Changes to federal estate tax law after December 31, 2000 have no effect on the Massachusetts calculation.
Table B runs on an “adjusted taxable estate,” which is the taxable estate minus $60,000. Brackets start at 0.8% and climb to 16%, and they are graduated, so each layer of value is taxed at its own rate.
The sequence DOR publishes for deaths on or after August 1, 2025 is:
Start with the federal gross estate.
Subtract real and tangible personal property located outside Massachusetts.
Add Massachusetts QTIP assets claimed on a predeceased spouse’s Massachusetts return.
Subtract the federal deductions Massachusetts allows. That result is the amount subject to Massachusetts estate tax.
Run that amount through Table B to get the computed tax.
Subtract the $99,600 credit. The result, but not less than zero, is what the estate owes.
What does an estate actually owe? Worked examples.
Round numbers, no out-of-state property, no QTIP.
A $2,000,000 taxable estate. Adjusted taxable estate is $1,940,000. Table B: $70,800 plus 7.2% of the $400,000 above $1,540,000, which is $28,800. Computed tax $99,600. Credit $99,600. Tax owed: zero.
A $2,100,000 taxable estate. Adjusted $2,040,000. Table B: $70,800 plus 7.2% of $500,000, or $36,000. Computed tax $106,800. Minus the credit: $7,200.
Sit with that one. The estate is $100,000 over the line. The myth says the whole $2.1 million gets taxed. The statute says $7,200, roughly seven percent of the overage and a third of one percent of the estate.
A $2,500,000 taxable estate. Adjusted $2,440,000. Computed tax $138,800. Minus the credit: $39,200, which is 1.6% of the estate.
A $3,000,000 taxable estate. Adjusted $2,940,000. Computed tax $182,000. Minus the credit: $82,400, roughly 2.7%.
A $5,000,000 taxable estate. Adjusted $4,940,000. Computed tax $391,600. Minus the credit: $292,000, roughly 5.8%.
A ramp, not a trapdoor. Run your own numbers against the Table B schedule in the DOR Estate Tax Guide, because real inputs are rarely round.
Why does the cliff myth persist?
Because it used to be right.
Before 2023 there was no credit. An estate at $1,000,001 computed a tax on the whole taxable estate with nothing to offset it, on the order of $33,000 for crossing the line by a dollar. That was a genuine cliff, it was notorious, and it is why the 2023 legislation created the credit.
A lot of content written before 2023 is still online, and a lot written since was built on it. The description stopped being accurate; the pages did not.
One more claim to watch for: a page saying Massachusetts has a $15 million threshold is mislabeling the federal exemption as a state one. The Massachusetts filing threshold is $2,000,000, with no inflation adjustment.
What is the current federal exemption?
Different tax, different numbers, and these move.
The IRS reports the basic exclusion amount for 2026 as $15,000,000, increased by legislation signed July 4, 2025. For 2025 it was $13,990,000. The annual gift tax exclusion is $19,000 per recipient for 2026, the same as 2025. It was $18,000 in 2024, and that stale figure still circulates widely, including in our own earlier writing, which we have corrected.
Because the federal exemption sits so far above the state threshold, the typical South Shore estate planning problem is not a federal one. It is a Massachusetts one, and it is real: a paid-off house in Norwell, a retirement account and a life insurance policy can clear $2 million without anyone feeling wealthy.
What changed on August 1, 2025?
This got almost no coverage, because the 2023 threshold change absorbed the attention. But the computation steps changed for deaths on or after August 1, 2025.
For resident decedents who owned property outside Massachusetts, the old text determined the credit from the federal taxable estate reduced by out-of-state property. The new text determines it from the federal gross estate, reduced by out-of-state property and increased by certain Massachusetts QTIP, with no deduction allowed that is attributable to the out-of-state property. If there was a condo in Florida or a camp in New Hampshire, the arithmetic of that exclusion is not what it was.
For nonresident decedents who owned Massachusetts property, the old provision computed the tax as a proportion: the ratio of Massachusetts property to the total federal gross estate, applied to the full credit. The new one computes the tax directly on the Massachusetts real and tangible property plus qualifying Massachusetts QTIP. A different method, not a clarification.
If you are a Massachusetts resident whose property is all in Massachusetts, with no QTIP from a first spouse, the substance of your calculation is unchanged. The amendment did not touch the $2,000,000 threshold or the $99,600 credit.
Date of death controls which steps apply, so an estate administered in 2026 for someone who died in 2024 uses the earlier method.
Who must file Form M-706, and when?
The personal representative files Form M-706 if the gross estate plus adjusted taxable gifts exceeds $2,000,000 for deaths on or after January 1, 2023. A nonresident decedent who owned Massachusetts real estate or tangible personal property files on the same basis, measured on the total worldwide estate, and also files Form M-NRA.
The return and the payment are due nine months after the date of death. Not nine months after probate opens, not nine months after you were appointed. Nine months after death.
All estate tax filers get an automatic six-month extension of time to file, but only if at least 80% of the total tax ultimately due was paid on or before the payment due date. Miss that 80% and the automatic extension is void. An extension of time to pay is a separate request on Form M-4768, available only for undue hardship or reasonable cause, and interest accrues either way. Late filing and late payment penalties each run 1% per month to a maximum of 25%.
One required attachment surprises people: an executed copy of federal Form 706 with a revision date of July 1999. Massachusetts still computes against the 2000 Code, so it wants the form from that era.
What if the estate is under the threshold?
You do not file Form M-706. But if the decedent owned real estate, you are not finished.
A lien arises automatically by operation of law on all Massachusetts real estate owned by a decedent at death. For estates below the filing threshold, DOR issues no release. Instead, an affidavit of the personal representative, sworn under the pains and penalties of perjury and recorded at the registry of deeds, is what clears title. DOR does not publish a blank form for it.
That affidavit is a common reason a South Shore closing stalls on a deceased owner’s property.
Should you be planning around this?
If a reasonable count of your assets lands near $2 million, the useful question is not “will I owe estate tax.” It is “what is my gross estate, what deductions apply, and will a return be required.”
Three things catch people out: life insurance death benefits are in the gross estate even when paid straight to a beneficiary; the gross estate is measured before subtracting your mortgage, and property in a revocable trust is still in it; and the marital deduction can defer tax at the first death while leaving a larger problem at the second.
None of this means your family owes money. It frequently means a return must be filed and a property lien cleared, on a nine-month clock, by someone who is also grieving.
Talk it through
If you are trying to work out whether a return is required, what a specific estate would actually owe, or how to clear a lien on a South Shore property, Sofio Law, PLLC offers a free 30-minute initial consultation. Attorney Jessica R. Sofio works with families across Plymouth and Norfolk counties.
Call (774) 801-9774, email info@sofio.law, or visit 100 Ledgewood Place, Suite 201, Rockland, MA 02370.
This post is general information about Massachusetts law, not legal advice, and reading it does not create an attorney-client relationship. Estate tax thresholds, credits, rate tables and federal exemption amounts change, and the computation that applies depends on the decedent’s date of death. Confirm current figures with DOR or with counsel before acting.
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