Massachusetts Estate Tax Exemption: The $2 Million Threshold

The Massachusetts estate tax exemption shields the first $2 million of an estate from state estate tax through a $99,600 credit. Estates valued at or below $2 million owe nothing. Estates above that threshold must file a return and pay graduated rates that climb from 0.8% to 16%, applied to the taxable estate rather than only to the amount over $2 million.¹

How the $2 Million Threshold Actually Works

The $2 million threshold took effect for deaths on or after January 1, 2023, replacing a $1 million threshold that had been in place since 2006.² The mechanism is unusual. Rather than carving out the first $2 million before computing tax, Massachusetts calculates tax on the full estate and then applies a credit of up to $99,600.¹ For an estate at or under $2 million, the credit wipes out the entire bill. For larger estates, the credit offsets a portion.

The credit replaced an older structure that worked as a true cliff: an estate worth $999,999 owed nothing, while an estate worth $1,000,001 owed tax computed on the full amount from the first dollar. The $99,600 credit eliminated that effect. An estate just over $2 million now owes a small tax rather than a bill calculated on its entire value.

What Counts Toward the $2 Million

The gross estate includes nearly everything the deceased owned or controlled at death. Real estate, bank accounts, investment portfolios, retirement accounts, business interests, vehicles, jewelry, artwork, and collectibles all go in at fair market value on the date of death.

Life insurance is the most common surprise. If the deceased held any ownership rights over a policy, including the ability to change beneficiaries, borrow against it, or cancel it, the full death benefit counts toward the gross estate. A $1 million payout can push an otherwise non-taxable estate well over the threshold.

Lifetime gifts matter for the filing question. Adjusted taxable gifts made after December 31, 1976 (gifts above the annual federal exclusion) are added back when determining whether the estate crosses the $2 million line.³ If a gross estate under $2 million plus prior taxable gifts exceeds $2 million, a return is required. The same is true if the gross estate exceeds $2 million before you subtract the value of out-of-state property, even if the Massachusetts-only portion is lower.⁴

Residency sets the reach. Massachusetts residents owe tax on all intangible property worldwide, including out-of-state bank and brokerage accounts, but tangible property and real estate physically located in other states is excluded from the Massachusetts calculation. Non-residents face Massachusetts estate tax only on real estate and tangible personal property physically located within the Commonwealth.²

How the Tax Is Calculated Above the Threshold

Massachusetts does not use a standalone rate table. It applies the federal credit for state death taxes under Internal Revenue Code Section 2011 as it existed on December 31, 2000. The resulting rates run from 0.8% on the smallest taxable amounts up to 16% on adjusted taxable estates above roughly $10 million.²

Start with the federal taxable estate (gross estate minus allowable deductions). Subtract $60,000 to get the adjusted taxable estate. Run that figure through the rate table. Then subtract the $99,600 credit.²

The graduated brackets applied to the adjusted taxable estate:

$0 to $40,000: no tax
$40,000 to $90,000: 0.8%
$90,000 to $140,000: 1.6%
$140,000 to $440,000: 2.4% to 3.2%
$440,000 to $1,040,000: 4.0% to 5.6%
$1,040,000 to $2,040,000: 6.4% to 7.2%
$2,040,000 to $5,040,000: 8.0% to 11.2%
$5,040,000 to $10,040,000: 12.0% to 15.2%
Over $10,040,000: 16.0%

To make it concrete: a $3 million estate (adjusted taxable estate of roughly $2,940,000) produces a gross tax of approximately $182,000 before the credit, leaving a net Massachusetts estate tax of roughly $82,400. Rates are modest at the low end but compound quickly on larger estates.

Deductions That Reduce the Taxable Estate

Several deductions shrink the taxable value. Funeral and burial costs are deductible, as are the administrative expenses of settling the estate (executor, attorney, accountant, and appraiser fees). Debts the deceased owed at death reduce the estate dollar for dollar: outstanding mortgages, unpaid medical bills, credit card balances, and personal loans. Charitable bequests to qualified organizations are fully deductible.

For married couples, the unlimited marital deduction is the most powerful tool. Assets that pass to a surviving U.S. citizen spouse, either outright or through a qualifying trust, are deducted in full and escape Massachusetts estate tax entirely at the first death.⁵ The deduction defers the tax rather than erasing it. When the surviving spouse dies, their estate includes everything they inherited, and the $2 million threshold applies again with no doubling.

Why Being Under the Federal Exemption Doesn’t Help

The federal estate tax exemption for 2026 is $15 million per individual, or $30 million for a married couple using portability.⁶ The gap between federal and Massachusetts thresholds is enormous. A $5 million estate owes nothing federally but faces a substantial Massachusetts bill. Any Massachusetts resident with assets above $2 million needs to plan for the state tax regardless of federal numbers.

The two taxes are calculated independently. Massachusetts does not allow a deduction for federal estate taxes paid, and the federal return offers no general deduction for state estate taxes. For most families, they are simply additive.

Filing the Return

Estates above the $2 million filing threshold must submit Form M-706 within nine months of the date of death, with payment due at the same time.³ Filing is available through MassTaxConnect, which the Department of Revenue recommends for faster processing of the closing letter and lien release.

The return must include a completed July 1999 revision of federal Form 706 with all attachments, even though no federal return is likely due. Massachusetts uses the federal form’s calculations as the starting point for the state tax.³

Extensions

Form M-4768 requests an extension. An automatic six-month extension to file is available if at least 80% of the tax ultimately owed was paid by the original nine-month deadline.⁷ An extension of time to file does not extend the time to pay. Interest accrues on unpaid balances from the original due date at the federal short-term rate plus four percentage points, compounded daily. Fraudulent returns carry a penalty of 50% of the underpayment.

The Lien on Real Estate

An automatic estate tax lien attaches to the deceased’s real property at death. The Department of Revenue issues a closing letter after processing the return, which clears the lien and lets you transfer clean title. If real estate needs to be sold before the return is filed, the executor can submit Form M-4422 to request a Certificate Releasing Massachusetts Estate Tax Lien. That filing requires an attested copy of the deed, a copy of the purchase and sale agreement or mortgage commitment, and payment of the estimated tax due.⁸

Planning Moves Near the Threshold

For married couples, the marital deduction defers all tax at the first death but concentrates the entire estate in the survivor’s name. A credit shelter trust (sometimes called a bypass or AB trust) addresses this. When the first spouse dies, up to $2 million flows into an irrevocable trust that benefits the surviving spouse and children. Because the survivor doesn’t own those assets, they’re not in the survivor’s taxable estate. The remainder passes to the spouse outright under the marital deduction. Done correctly, a married couple can shelter up to $4 million from Massachusetts estate tax by using both exemptions.

Life insurance planning matters because a single policy can push an estate over the line. Transferring ownership of a policy to an irrevocable life insurance trust removes the death benefit from the insured’s estate. For federal purposes, the transfer must happen at least three years before death, and the insured cannot retain any incidents of ownership. For someone with a $1.8 million estate and a $500,000 policy, this move can be the difference between owing tax and owing nothing.

Lifetime gifting reduces the size of the estate at death. Gifts above the annual federal exclusion ($19,000 per recipient in 2025) count as adjusted taxable gifts and factor into the Massachusetts filing threshold, but gifts within the annual exclusion do not. Massachusetts has no separate gift tax, so completed lifetime gifts are not independently taxed by the state. For families in the $2 million to $4 million range, modest planning can eliminate the Massachusetts estate tax entirely.

1
Massachusetts General Laws. Massachusetts General Code 65C 2A – Transfer of Estate and Real Property; Tax
2
Mass.gov. Massachusetts Estate Tax Guide
3
Commonwealth of Massachusetts Department of Revenue. Instructions for Massachusetts Estate Tax Return Form M-706
4
Mass.gov. FAQs – New Estate Tax Changes
5
Mass.gov. Directive 95-1 – The Massachusetts Unlimited Marital Deduction
6
Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax
7
Mass.gov. Request an Extension to File and Pay Your Massachusetts Estate Tax
8
Mass.gov. Form M-4422 Guidelines