Montana Estate & Inheritance Tax — Best Proven Guide (2026)

✓ Verified June 2026

This guide explains Montana estate tax and inheritance tax in plain English — whether Montana taxes your estate, who pays, the exact exemptions, and how the federal estate tax fits in for 2026. All figures verified as of June 2026.

Montana Estate & Inheritance Tax at a Glance

Here is exactly how Montana estate tax and inheritance tax work:

Spousal portability (federal): Yes. A surviving spouse may elect portability of the deceased spouse’s unused federal estate tax exemption (DSUE) by filing a timely federal estate tax return (IRS Form 706), even if no tax is owed. This can effectively double the exemption to 30000000 for a married couple in 2026.

Gift tax: Montana does not impose a state gift tax. Only the federal gift tax applies. The federal annual gift tax exclusion for 2026 is 19000 per recipient per year. Gifts above that amount count against the 15000000 lifetime exemption.

Estate Tax vs Inheritance Tax: The Difference

People use these two terms as if they mean the same thing, but they are different taxes that work in opposite ways. An estate tax is charged to the estate itself before anything is handed out — the estate pays it, then the heirs receive what is left.

An inheritance tax is charged to the people who receive the money — each heir may owe tax on their share, and the rate often depends on how closely related they were to the person who died.

This matters for Montana families because the two taxes are set by different rules. The federal government only has an estate tax, never an inheritance tax. A state can have an estate tax, an inheritance tax, both, or — as in most states — neither. When you know which one (if any) applies in Montana, you know exactly who would be responsible for paying.

How the Federal Estate Tax Works

No matter which state you live in, the federal estate tax sets a very high exemption, which is the amount an estate can be worth before any federal tax is owed. Estates below that exemption owe no federal estate tax at all, and the overwhelming majority of estates fall well below it.

For 2026, the federal exemption is $15 million per person — a level the One Big Beautiful Bill Act made permanent in 2025 and indexes for inflation — so the figure in the table above is current and is not scheduled to drop.

Married couples get an extra advantage. Anything left to a surviving spouse passes free of federal estate tax under the unlimited marital deduction, and a surviving spouse can often carry over the unused portion of their late spouse’s exemption — a feature called portability. In practice this means a married couple can shield roughly double the individual exemption before federal estate tax ever enters the picture.

Who Actually Owes Estate Tax in Montana

Because Montana has no state estate tax, no inheritance tax, and no gift tax, and the federal exemption is 15000000 per person in 2026, the vast majority of Montana families will owe no estate or death tax at any level.

Families with combined estates approaching or exceeding 15000000 (or 30000000 for married couples using portability) should consult a licensed estate planning attorney or tax advisor to evaluate strategies such as trusts, lifetime gifting, and charitable planning.

Montana residents who own real property in a state that does levy an inheritance tax (such as Iowa, Kentucky, Maryland, Nebraska, New Jersey, or Pennsylvania) may owe that state’s inheritance tax on the out-of-state property.

Other Montana estate/inheritance tax rules: Montana previously had an inheritance tax that was repealed by voter initiative I-115 effective January 1 2001. Montana also had a pick-up estate tax tied to the federal state death tax credit which became zero for deaths after December 31 2004 when the federal credit was phased out. Neither tax has been reinstated.

For estates of decedents who died before January 1 2001 (inheritance tax) or before January 1 2005 (estate tax), a clearance certificate from the Montana Department of Revenue may still be required to transfer securities. Montana Code Annotated Title 72 Chapter 16 contains the historical estate and generation-skipping tax provisions.

What This Means for Your Montana Family

The bottom line for Montana: because Montana has neither a state estate tax nor a state inheritance tax, almost every family here will owe no death tax of any kind at the state level. The only tax that could apply is the federal estate tax, and that affects only the largest estates — those above the federal exemption shown above.

For the vast majority of Montana families, the answer to “will we owe estate tax?” is simply no.

Either way, planning ahead helps. Keeping beneficiary designations current, holding property in the right way, and — for larger estates — talking to a tax professional can keep more of what you have built in your family’s hands. None of this requires owing estate tax; it is simply good estate planning.

It also helps to know what an estate tax does not touch. Life insurance paid to a named beneficiary, retirement accounts with named beneficiaries, and assets held in certain trusts generally pass outside the taxable estate, which is one reason these tools are so common in planning.

Day-to-day inheritances that most Montana families receive — a home, a bank account, a car, personal belongings — are almost never large enough to trigger any estate tax at all. If you are unsure where your family stands, the safest step is a short conversation with a licensed Montana estate or tax professional who can look at the actual numbers.

Understanding Montana Estate and Inheritance Tax

Worrying about Montana estate tax is common, but most families owe nothing. Whether Montana estate tax applies depends on the size of the estate and whether Montana levies an estate tax, an inheritance tax, or neither. The table above shows the exact exemptions and rates, plus the current federal exemption, so you can see where you actually stand on Montana estate tax.

If your estate is large enough that Montana estate tax could apply, a licensed tax professional in your state can help you plan.

Official Montana Sources & Resources

• Montana Department of Revenue: https://revenue.mt.gov/taxes/fiduciaries/estate-and-inheritance-tax
• Montana Estate Tax Statute: https://www.irs.gov/businesses/small-businesses-self-employed/estate-tax
• Internal Revenue Service — Estate Tax: irs.gov
• Cornell Legal Information Institute: law.cornell.edu/wex

This Montana estate-tax guide was last verified against official sources in June 2026. Tax laws and exemptions change yearly — verify with your state revenue department or a licensed tax professional.

More Montana Wills & Probate Guides

• Montana Wills & Estate Planning
• Montana Probate Process
• Dying Without a Will in Montana
• Montana Small Estate Affidavit
• Montana Living Trust
• Probate Cost Calculator
• All 51 States

Disclaimer: This guide is informational only and is not legal or tax advice. Estate, probate, and tax laws change and vary by state and county. Verify current rules and dollar figures with your state’s court, statute, or a licensed attorney or tax professional before acting. For urgent matters like an active probate or a tax deadline, consult a licensed professional in your state right away.