Montana Estate Tax: What Heirs Actually Owe (and Don't)

When a loved one dies, one of the first fears that surfaces is how much of the estate the government will claim. Montana families deal with a lot during estate settlement — but a state death tax is not one of them.

Montana has no state-level estate tax and no inheritance tax. Montana repealed its estate tax years ago and has never enacted an inheritance tax. For the vast majority of Montana families settling an estate, the only potential tax exposure comes from federal law — and the federal exemption threshold is high enough that most estates never touch it.

Here is what you actually need to know about taxes when settling a Montana estate.

Montana Has No Estate Tax and No Inheritance Tax

This is the short answer, and it matters. Some states impose their own estate tax (levied against the estate before assets are distributed) or an inheritance tax (levied against the beneficiary who receives assets). Montana does neither.

If your parent dies in Billings and leaves you a home, savings accounts, and personal property, the state of Montana will not send you a tax bill simply because you inherited those assets.

This makes Montana relatively favorable for estate settlement compared to states like Oregon, Massachusetts, or Iowa, which maintain their own death taxes with relatively low exemption thresholds.

The Federal Estate Tax Is Still Relevant for Large Estates

While Montana imposes no state death tax, the federal estate tax under the Internal Revenue Code applies to all U.S. residents regardless of state. If an estate's total taxable value exceeds the federal exemption, IRS Form 706 must be filed within nine months of the date of death.

For 2025 and 2026, the federal estate tax exemption is approximately $13.6 million per individual (this figure adjusts annually for inflation). Married couples can effectively double this through portability, meaning the surviving spouse can use the deceased spouse's unused exemption.

For the overwhelming majority of Montana estates, this threshold is simply not relevant. Montana's median household wealth is well below the federal exemption, and most estates settled in the state involve a family home, vehicles, retirement accounts, and modest savings — not enough to trigger federal estate tax liability.

If an estate is unusually large — a significant ranch, commercial real estate holdings, or substantial investment portfolios — a CPA or estate tax attorney should evaluate whether Form 706 is required. The penalty for failing to file when required is steep.

What Montana Estates Do Pay: Income Taxes During Administration

Even though there is no estate tax, the personal representative of a Montana estate has tax obligations that do apply.

Final individual income tax return: The personal representative must file a final Montana income tax return for the decedent, covering January 1 of the year of death through the date of death. This is filed on the same Form 2 used for living residents.

Fiduciary income tax return (Form FID-3): If the estate itself earns income during the administration period — rent from a property, interest on bank deposits, dividends from a brokerage account — the estate is treated as a separate taxable entity. The personal representative must file Montana Form FID-3 alongside a copy of the federal Form 1041. If that estate income is distributed to beneficiaries, the personal representative must also issue a Montana Schedule K-1 to each beneficiary so they can report their share on their own returns.

This is a common oversight. Families assume that because no estate tax applies, there are no tax filings to manage. But if the estate owns a rental property or holds investments generating dividends, income tax obligations persist throughout the administration period.

If you are managing a Montana estate with multiple income sources, consulting a CPA before closing the estate is the right call.

If you want a step-by-step sequence for handling all of the tax and administrative obligations — including the correct order to file, which accounts to close first, and how to handle creditor claims before distributions — the Montana Estate Settlement Guide walks through the entire process in a single document.

Medicaid Estate Recovery Is Not a Tax — But It Functions Like One

One tax-adjacent obligation that surprises many Montana families is Medicaid estate recovery. If the decedent received Montana Medicaid benefits at age 55 or older, or was institutionalized at any age, the Department of Public Health and Human Services (DPHHS) is legally required to file a claim against the estate to recover those costs.

Montana uses an "expanded recovery" definition under MCA 53-6-167. This means the state can pursue not just the formal probate estate, but also assets that passed outside probate — including homes transferred via Transfer on Death deeds, joint tenancy property, and payable-on-death accounts. Many families assume that using a TOD deed to avoid probate also shields the home from Medicaid recovery. In Montana, that assumption is wrong.

This is not an estate tax, but its practical effect on the estate is similar: it reduces what beneficiaries ultimately receive. The difference from a tax is that exemptions apply — DPHHS cannot recover if a surviving spouse is alive, or if the decedent had a child under 21 or a child who is permanently disabled.

No Inheritance Tax on What Beneficiaries Receive

To be precise about terminology: Montana has no inheritance tax. An inheritance tax is paid by the recipient of the inheritance, not the estate. Montana imposes no such tax at any level.

If you inherit a house, a vehicle, retirement accounts with you as named beneficiary, or personal property from a Montana decedent, you do not pay Montana taxes simply because you received those assets.

You may, however, owe federal income tax if you later sell inherited assets that have appreciated — but that is a capital gains question, not an estate or inheritance tax question, and the basis for inherited assets is generally stepped up to the fair market value at the date of death under federal law.

Practical Summary for Montana Estate Administrators

• Montana has no state estate tax and no inheritance tax.
• Federal estate tax applies only if the total taxable estate exceeds approximately $13.6 million (2025-2026 figure).
• The personal representative must file a final income tax return for the decedent and a fiduciary income tax return (Form FID-3) if the estate generates income during administration.
• Medicaid estate recovery is separate from estate taxes but can significantly reduce the estate's assets — and it applies to non-probate transfers in Montana.
• Beneficiaries owe no Montana tax simply for receiving an inheritance.

For most Montana families, the tax picture is manageable. The bigger administrative challenges are typically the procedural steps — ordering death certificates, categorizing assets as probate or non-probate, navigating the small estate affidavit process, and distributing property in the right order. The Montana Estate Settlement Guide covers all of those steps with the specific forms, deadlines, and statutory thresholds that apply in this state.

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