Massachusetts has its own estate tax, separate from the federal one, and it applies to estates over $2 million. There is no portability between spouses, so a married couple without a plan can waste the first spouse's threshold. A home, retirement accounts, and life insurance can push an ordinary family over the line, but planning can reduce or eliminate the tax.
Most Massachusetts families are surprised to learn that the state has its own estate tax, separate from the federal one, and that the threshold is far lower than they expect. You do not need to be wealthy to owe it. A paid-off home on the North Shore, a retirement account, and a life insurance policy can quietly add up to more than $2 million, the point at which Massachusetts begins to tax your estate.
This article explains how the Massachusetts estate tax works, why so many ordinary families cross the threshold, and the planning tools that can reduce or eliminate the tax.
Does Massachusetts Have Its Own Estate Tax?
Massachusetts is one of only about a dozen states that still impose a state-level estate tax. The federal estate tax exemption is very high, $15 million per person as of 2026, so the overwhelming majority of families never owe a penny of federal estate tax. The Massachusetts tax is a different story. Its threshold is just $2 million, and it is not indexed to inflation, so it does not rise each year the way the federal exemption does.
The practical result: a family that owes nothing to the IRS can still owe a meaningful Massachusetts estate tax bill.
How Does the $2 Million Threshold Work?
For deaths on or after January 1, 2023, Massachusetts provides a credit that effectively eliminates the tax on the first $2 million of an estate. If your taxable estate is $2 million or less, you owe no Massachusetts estate tax. That credit is $99,600, a figure chosen because it is precisely the tax that would otherwise fall on an estate of exactly $2 million.
This was a significant improvement over the old rules. Before the 2023 reform, the threshold was $1 million, and it operated as a true "cliff": if your estate exceeded $1 million by even a dollar, the entire estate, starting from the first dollar, was taxed. The 2023 change, enacted as Chapter 50 of the Acts of 2023 and now found at G.L. c. 65C, section 2A(f) and (g), did two things. It doubled the threshold, and it removed that all-or-nothing result altogether.
The second part is the one that gets overlooked. Because the credit offsets the tax on the first $2 million exactly, an estate that crosses the line by a small margin now owes only a small amount, instead of being taxed on its entire value. The old trap, where an estate of $1,000,001 could fare dramatically worse than one of $999,999, is gone rather than merely reduced.
The threshold still matters a great deal, though. Once you are over $2 million, the tax applies, and the rates climb on a graduated scale up to 16 percent.
Why this catches North Shore families: The Massachusetts estate tax counts your gross estate, everything you own or control at death. That includes the full value of your home, your retirement accounts (IRAs and 401(k)s), any life insurance policy you own, brokerage and bank accounts, vehicles, and personal property. In a region where a long-owned home can be worth a million dollars on its own, a married couple with a house, retirement savings, and a life insurance policy can cross $2 million without ever feeling "rich."
Is There Portability for Married Couples in Massachusetts?
This is one of the most important and least understood features of the Massachusetts estate tax.
Under federal law, spouses enjoy "portability": when the first spouse dies, the survivor can carry over the deceased spouse's unused exemption. Massachusetts has no portability. Each spouse has their own $2 million threshold, but if you do not plan for it, the first spouse's threshold can be wasted entirely.
Here is how the trap springs. Most married couples leave everything to each other. Transfers between spouses are tax-free, so no tax is due when the first spouse dies. But everything is now concentrated in the survivor's estate. When the second spouse dies, only one $2 million threshold is available, and an estate that two thresholds could have sheltered is now taxed.
With proper planning, typically a credit shelter trust (also called a bypass trust), a married couple can preserve both thresholds and shelter up to roughly $4 million from the Massachusetts estate tax. Without it, half of that protection can simply disappear.
How Can Planning Reduce the Massachusetts Estate Tax?
The Massachusetts estate tax is one of the most plannable taxes there is. Several well-established tools can reduce or eliminate it:
- Credit shelter (bypass) trusts. The cornerstone of married-couple planning. Structuring your estate plan so that the first spouse's $2 million threshold is captured in a trust, rather than passing outright to the survivor, can preserve both spouses' thresholds.
- Irrevocable life insurance trusts (ILITs). Life insurance you own is counted in your taxable estate. Holding the policy in a properly structured ILIT can remove the death benefit from your estate, which is especially valuable because life insurance is often what pushes a family over the line.
- Lifetime gifting. Massachusetts does not impose a separate gift tax, which opens planning opportunities to move assets out of your estate during your lifetime. The interaction between lifetime gifts and the estate tax calculation has technical rules, so this should always be done with attorney guidance.
- Charitable giving. Gifts to charity, whether outright or through a charitable trust, reduce the taxable estate while supporting causes that matter to you. See our article on charitable giving in your estate plan.
How Can You Estimate Your Massachusetts Estate Tax?
If you want a rough sense of where you stand, our Massachusetts Estate Tax Calculator lets you add up the major components of your estate and see whether you are likely to be over the threshold. It is a starting point, not a substitute for advice, the real numbers depend on how assets are titled, who your beneficiaries are, and how your documents are structured.
The encouraging news is that this is a problem with solutions. Families who plan ahead routinely reduce or eliminate a tax that families who do nothing simply pay. The first step is knowing whether you are exposed.