If you’re handling a loved one’s estate in Massachusetts, understanding inheritance tax guidelines is essential not because Massachusetts has an inheritance tax (it doesn’t), but because it does have its own estate tax that often catches people off guard. Many assume that since there’s no federal inheritance tax and Massachusetts doesn’t tax beneficiaries directly, nothing is due. That’s not the case. The state imposes an estate tax on assets above a certain threshold, and failing to file or pay correctly can delay probate, trigger penalties, or reduce what heirs ultimately receive.

Does Massachusetts have an inheritance tax?

No. Massachusetts does not levy an inheritance tax, which is a tax paid by the person who inherits money or property. Instead, the state collects an estate tax a tax on the total value of the deceased person’s estate before assets are distributed. This distinction matters because the responsibility falls on the estate itself, not the beneficiaries, but the outcome still affects how much heirs get.

When does the Massachusetts estate tax apply?

The Massachusetts estate tax kicks in if the gross value of the estate exceeds $1 million. This includes real estate, bank accounts, investments, business interests, and even life insurance proceeds if the decedent owned the policy. Unlike the federal estate tax exemption (which is over $13 million in 2024), Massachusetts’ $1 million threshold hasn’t changed in years, so even modest estates can be subject to it.

For example, a home valued at $800,000 plus retirement accounts worth $300,000 would push the estate to $1.1 million $100,000 over the limit. That excess amount may owe estate tax at rates starting around 0.8% and climbing to 16% on amounts over $10 million.

What assets count toward the $1 million threshold?

Nearly everything the decedent owned at death counts, including:

  • Real estate in Massachusetts (and sometimes out-of-state property)
  • Bank and brokerage accounts
  • Retirement accounts like IRAs and 401(k)s
  • Life insurance if the decedent was the policy owner
  • Business interests and personal property of significant value

Jointly owned assets with rights of survivorship usually pass outside probate but may still be included in the taxable estate if the decedent contributed to their purchase.

Common mistakes people make

One frequent error is assuming that because an asset avoids probate like a payable-on-death account or a jointly held home it’s also excluded from estate tax calculations. It’s not. Another is missing the filing deadline. Even if no tax is owed, estates over $1 million must file Form M-706 with the Massachusetts Department of Revenue within nine months of death. Late filings can incur interest and penalties.

People also overlook available deductions. Debts, funeral expenses, and administrative costs can reduce the taxable estate. Failing to claim these means paying more tax than necessary.

Are there exemptions or ways to reduce the tax?

Massachusetts doesn’t offer a marital deduction for non-citizen spouses, unlike federal rules. However, transfers to a surviving U.S. citizen spouse are generally exempt from estate tax. Charitable bequests also reduce the taxable estate dollar for dollar.

Some estates qualify for the “small estate” affidavit process if under $25,000 in personal property (plus a vehicle), but this doesn’t eliminate estate tax obligations if the total value exceeds $1 million. For planning purposes, strategies like irrevocable trusts or lifetime gifting may help, but they require careful setup. Learn more about available exemptions and planning options if you’re preparing ahead of time.

What forms do I need to file?

If the estate exceeds $1 million, you’ll need to file the Massachusetts Estate Tax Return (Form M-706). You may also need to submit a federal Form 706 if the estate is large enough, though many Massachusetts estates fall below the federal threshold.

Accurate valuation is critical. Real estate should be appraised as of the date of death (or alternate valuation date, if elected). Financial institutions can provide account values. Mistakes in valuation often lead to audits or reassessments later. A detailed overview of required paperwork is available in our guide to Massachusetts estate administration forms.

How does this fit into the overall estate administration process?

Estate tax filing is just one step in administering a Massachusetts estate. Before distributing assets, the executor must settle debts, file final income tax returns, and obtain a tax clearance letter from the state. Without that clearance, banks and registries won’t release assets.

The full sequence from opening probate to closing the estate can take months or even years if tax issues arise. Understanding where estate tax fits helps avoid bottlenecks. For a step-by-step look at the entire process, see our breakdown of the estate administration process in Massachusetts.

Do I need professional help?

For estates near or above $1 million, consulting a Massachusetts estate attorney or CPA is wise. They can help determine if a return is required, calculate deductions accurately, and ensure compliance with both state and federal rules. The Massachusetts Department of Revenue provides basic guidance, but complex situations like out-of-state property, blended families, or business holdings often need tailored advice.

You can review official filing thresholds and instructions on the Massachusetts Department of Revenue website.

Next steps if you’re handling an estate

  • Add up all assets as of the date of death don’t forget life insurance and retirement accounts.
  • Check if the total exceeds $1 million. If yes, plan to file Form M-706.
  • Gather documentation for debts, expenses, and charitable gifts to reduce taxable value.
  • File within nine months to avoid penalties even if you request an extension to pay.
  • Review the full filing requirements in our guide to Massachusetts estate tax filing requirements before submitting anything.