Massachusetts Form 2 and Estate Tax Return Instructions for Executors

Most executors expect to deal with one tax return for a deceased person. Massachusetts requires up to four distinct filings, and two of them — the fiduciary income tax return and the estate tax return — trip up even well-organized personal representatives.

This article covers the mechanics of both: Massachusetts Form 2 (the fiduciary income tax return) and Form M-706 (the Massachusetts estate tax return). It also explains the 2023 and 2024 legislative changes that altered how M-706 is calculated — changes that are still not reflected in many older guides circulating online.

Massachusetts Form 2: The Fiduciary Income Tax Return

Form 2 is the Massachusetts Fiduciary Income Tax Return. It covers income the estate earns after the date of death, during the administration period. This is entirely separate from the decedent's final personal income tax return, which covers income earned before death and is filed on Form 1.

The threshold that catches executors off guard: Massachusetts requires a Form 2 filing if the estate generates $100 or more in gross taxable income. That is not a typo. One hundred dollars. A single month of interest on an estate checking account, a final dividend payment, or a week of rental income from an inherited property will almost certainly cross this threshold. Because formal probate in Massachusetts routinely takes 12 to 18 months, nearly every estate that remains open through the statutory one-year creditor claim period will owe a Form 2 filing.

What counts as estate income: Interest, dividends, rental income, capital gains from asset sales during administration, and business income generated by estate property all flow through Form 2. If the estate sells an investment or a piece of property during probate, that gain is reported here.

Deadline: Form 2 is due April 15 of the year following the close of the estate's tax year. Because most estates use a calendar tax year, this typically means April 15 of the year after the decedent's death. Extensions are available but do not extend the time to pay — estimated taxes should be submitted by the original deadline to avoid penalties.

The K-1 obligation: If the estate has beneficiaries who received distributions, the executor must issue Schedule 2K-1 to each one. Beneficiaries report their share of estate income on their own personal returns. Failing to issue K-1s creates downstream problems when beneficiaries file their individual returns.

Penalties: The failure-to-file penalty is 1% of the tax owed per month, up to 25%. Late payment carries an additional 1% per month penalty, also capped at 25%. These penalties apply even on small balances, so the low $100 threshold makes timely filing particularly important.

Form 2 is available directly from the Massachusetts Department of Revenue at mass.gov. Payments can be submitted through MassTaxConnect.

Massachusetts Form M-706: The Estate Tax Return

Form M-706 is the Massachusetts Estate Tax Return. It is required when the decedent's gross estate — meaning the total fair market value of all assets owned at death — plus any adjusted taxable gifts made during life, exceeds $2 million.

This return is due nine months from the date of death. If more time is needed, Form M-4768 (the extension application) can be filed, but any estimated tax must be paid by the original nine-month deadline to avoid DOR penalties.

What changed in 2023 — and why your old instructions may be wrong

Before understanding how to file M-706, you need to understand why instructions from 2022 and earlier are now incorrect in two significant ways.

Change 1: The threshold and the cliff (St. 2023, c. 50, retroactive to January 1, 2023)

Massachusetts previously taxed estates over $1 million — and it used a "cliff" system where crossing the threshold by even $1 made the entire estate, back to the first dollar, subject to taxation. A $1.1 million estate might owe $36,000 in state tax while a $999,999 estate owed nothing.

The 2023 reform did two things simultaneously: it raised the filing threshold to $2 million, and it introduced a uniform $99,600 credit against any calculated estate tax. The credit effectively eliminates the cliff by ensuring that only the value above $2 million is meaningfully taxed. An estate worth $2.1 million now effectively owes tax only on the $100,000 excess.

The marginal rates still range from 7% to 16% depending on bracket, but the credit structure means the practical bite is much smaller for estates near the threshold. And because this change was retroactive to January 1, 2023, estates that were open during calendar year 2023 and paid tax under the old rules may be entitled to amended returns.

Change 2: Out-of-state property exclusion (St. 2024, c. 206, retroactive to January 1, 2023)

Massachusetts historically required resident decedents to include the value of out-of-state real estate and tangible personal property in the taxable estate. This was challenged in court in Dassori v. Commissioner of Revenue, where the inclusion of non-Massachusetts real estate was ruled unconstitutional.

St. 2024, c. 206, enacted in September 2024, formally excluded out-of-state real and tangible property from the Massachusetts estate tax calculation — retroactive to deaths on or after January 1, 2023. The DOR released an updated Form M-706 specifically for decedents dying on or after August 1, 2025, to cleanly separate in-state and out-of-state assets.

Practical implication: If the decedent owned a vacation home in New Hampshire, a condo in Florida, or any tangible personal property located outside Massachusetts, that property is now excluded from the taxable estate calculation. For estates near the $2 million threshold, this exclusion can eliminate the filing requirement entirely.

Filing M-706 when the estate exceeds $2 million

If the gross estate plus adjusted taxable gifts exceeds $2 million, the executor must:

1. Obtain date-of-death valuations for all assets — real estate appraisals, brokerage account statements, business valuations. These establish the gross estate.
2. Identify and value any taxable lifetime gifts (gifts exceeding the federal annual exclusion, which is $19,000 per recipient for 2026) made by the decedent. Massachusetts does not have a separate gift tax, but these gifts are added back to the gross estate to determine whether the $2 million threshold is breached.
3. Separate in-state assets from out-of-state assets. Only Massachusetts real estate and tangible personal property located in the Commonwealth are included in the taxable estate. Out-of-state real and tangible property is excluded under the 2024 reform.
4. Calculate the tentative Massachusetts estate tax using the graduated rate schedule.
5. Apply the $99,600 credit. The resulting net tax is what is owed.
6. Submit the M-706 with payment by the nine-month deadline.

After the DOR processes the return and confirms full payment, it issues a Massachusetts Estate Tax Closing Letter. The executor must also file Form M-4422 (Application for Certificate Releasing Massachusetts Estate Tax Lien) to formally clear the automatic lien that attaches to all Massachusetts real estate upon death. No real property can be sold or refinanced until this certificate is recorded at the Registry of Deeds.

Filing an affidavit when the estate is under $2 million

Even if the estate falls below the $2 million threshold and no M-706 is required, the automatic Massachusetts estate tax lien still attaches to any real property owned by the decedent. To clear that lien — which is required before a property sale can close — the executor or surviving joint owner must draft and record an Affidavit of No Estate Tax at the local county Registry of Deeds. This affidavit states, under pains and penalties of perjury, that the estate does not meet the M-706 filing threshold. The recording fee is $105.

This step is the single most common stumbling block in Massachusetts estate administration. Families who know they owe no estate tax often do not realize the lien exists independently of any tax liability, and discover it only when a real estate closing stalls.

How Form 2 and M-706 Interact

These two returns are sometimes confused because both involve the estate. The distinction is straightforward:

• M-706 looks backward to the date of death. It calculates the total value of everything the decedent owned at the moment of death and determines whether estate tax is owed.
• Form 2 looks forward from the date of death. It tracks income the estate earns during administration and determines what income tax the estate owes on that earnings.

An estate can owe both, either, or neither. A $3 million estate that generates no income during a fast six-month probate might owe M-706 but not Form 2. A $1.5 million estate that holds a rental property for 18 months during probate might owe Form 2 but not M-706.

The DOR runs information-sharing programs with the IRS. If an executor files a federal Form 1041 (the federal fiduciary income tax return), the DOR will expect a corresponding Form 2 if the Massachusetts $100 threshold is met. Do not assume that filing federally and ignoring the state obligation will go unnoticed.

Where to Get the Forms

Both forms are available through the Massachusetts Department of Revenue at mass.gov. Search "DOR estate tax forms and instructions" to access M-706, M-4422, M-4768, and associated worksheets. Form 2 is listed under fiduciary income tax forms. The DOR also maintains MassTaxConnect for online payment and electronic filing of certain returns.

For a complete walkthrough of both filings — including the M-706 credit calculation under the 2023 rules, the Affidavit of No Estate Tax template, Form 2 filing triggers, and the nine-month deadline calendar — the Massachusetts Final Tax & Estate Tax Guide covers each step with checklists and line-by-line instructions designed for executors without a tax background.

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