By Brad Caponigro · Founder, Pointer Petroleum LLC · Reservoir engineer
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For Attorneys & CPAs
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Montana probate is governed by Title 72 of the Montana Code Annotated, which adopts the Uniform Probate Code. Probate is filed in the district court of the county of the decedent’s domicile.
Three tracks are in routine use:
1. Informal probate (MCA § 72-3-201 et seq.) — the typical vehicle. The personal representative files an application with the clerk of district court and, after the statutory waiting period, receives letters testamentary or of administration without a court hearing.
2. Formal probate (MCA § 72-3-301 et seq.) — used when the will is contested, heirship is disputed, or supervised administration is appropriate.
3. Small-estate collection by affidavit (MCA § 72-3-1101) — reaches personal property only when the gross value of the estate (less liens and encumbrances) does not exceed the statutory cap. It does not clear mineral title, which is real property.
For mineral interests of meaningful value, informal probate followed by recording of the personal representative’s deed of distribution in each situs county is the standard workflow. The personal representative’s deed is the document operators and county clerks rely on to update title.
Two production groupings drive the bulk of contemporary Montana mineral-probate volume:
1. Eastern Bakken / Three Forks (Williston Basin extension) — Richland, Roosevelt, Sheridan, McCone, Dawson, Wibaux, and Fallon counties. Activity is generally lower-intensity than the North Dakota Bakken core but follows the same operator footprint. Companies including Continental Resources, Kraken Resources, and Denbury (CO2 EOR-adjacent) have operated positions across these counties.
2. Powder River and southeastern Montana — Big Horn, Rosebud, Powder River, Custer, and Carter counties. Conventional and CBM (coalbed methane) production with periodic activity. Crow and Northern Cheyenne tribal acreage in Big Horn and Rosebud routes some interests through BIA-administered leasehold (see federal/tribal overlay below).
Secondary activity in the Bowdoin / Tiger Ridge gas areas of north-central Montana (Blaine, Hill, Phillips counties) generates intermittent estate work on smaller-scale interests.
Document packages typically process in 30–60 days for complete submissions where operators are well-staffed; smaller operators in the Powder River CBM legacy may take longer.
Montana, like Wyoming, has substantial federal-leased mineral acreage administered by BLM’s Montana State Office. In addition, Montana has two large mineral-bearing reservations — the Crow Reservation (parts of Big Horn and Yellowstone counties) and the Northern Cheyenne Reservation (parts of Rosebud and Big Horn) — with mineral leases administered by the Bureau of Indian Affairs (BIA).
Key practical consequences for estate practice:
— Federal-lease royalty income flows through ONRR statements, not the operator. The personal representative must identify any ONRR payee accounts and request transfer-of-payee documentation.
— BIA-administered tribal-lease royalty income flows through BIA-supervised payor channels with their own procedural overlay. For non-tribal-member royalty interests subject to BIA-administered leases, transfer-of-payee documentation may require coordination with both BIA and the tribal natural-resources office.
— Tribal acreage transactions involving non-Indians are subject to additional federal regulatory layers (25 CFR part 211/212/225 depending on the lease type). These are operator-side issues but they affect the practical timeline for getting royalty out of suspense post-probate.
At intake on a Montana mineral-asset estate: ask whether the decedent received ONRR statements, whether any acreage is within an Indian reservation, and budget extra time on any federal/tribal portion of the curative path.
Montana does not impose a state estate tax or inheritance tax. The Montana inheritance tax was repealed effective for deaths after January 1, 2001.
For mineral-asset estates, the consequences:
— Federal estate tax applies if the gross estate exceeds the federal exclusion ($13.99M per decedent for 2025; the indexed amount — confirm the current-year figure on the IRS Rev. Proc. release).
— No Montana estate-tax filing is required at any value.
— The mineral appraisal supporting the federal Form 706 is the only valuation document required for tax purposes.
For non-Montana-domiciled decedents who owned Montana mineral interests, no Montana estate-tax filing is required, but ancillary administration in the situs county district court is required for title purposes — the home-state letters do not bind Montana real property.
Note on ongoing tax: Montana levies an oil and gas production tax with rates that vary by well type, age, and incentive status (newer horizontal wells receive reduced introductory rates that step up after a holiday period). Counties levy ad valorem tax on producing minerals. These appear on the royalty owner’s pay stub or are netted in operator accounting. They are operational severance and ad valorem items — not estate-tax items — but practitioners reconstructing pre-DoD royalty income for the federal Form 706 valuation should expect to see them.
Montana also imposes a state income tax on royalty income, which is relevant for the estate’s and beneficiaries’ ongoing income-tax planning even though it is not an estate-tax item.
Ancillary Montana administration for a non-domiciliary decedent uses the same UPC machinery as a domiciliary case. The personal representative appointed in the home state files an application for ancillary appointment in the situs county district court, attaches authenticated copies of the home-state letters and the will (if any), and receives ancillary letters.
A few practical notes:
— Bond is governed by MCA § 72-3-514; corporate fiduciaries and attorney-fiduciaries acting in ancillary capacity often receive bond waivers, but verify with the specific district court.
— The deed of distribution must be recorded in every Montana situs county; minerals in three counties = three recordings.
— Federal-acreage interests require parallel curative through BLM, and tribal-acreage interests require parallel curative through BIA. Plan for a longer overall timeline when the estate includes federal-leased or BIA-administered minerals.
— For estates with eastern Bakken interests only and no federal/tribal exposure, the workflow is structurally similar to a North Dakota Bakken estate.
Common curative tasks alongside probate:
— Recording of the deed of distribution in every situs county.
— ONRR payee transfer for federal-lease royalty.
— BIA payor coordination for tribal-lease royalty.
— Affidavits of identity to clear name discrepancies in the chain.
— Coordination with operators, ONRR, and BIA for release of suspense royalty post-recording.
Five issues recur on Montana mineral-estate work:
1. Missing the BIA tribal-lease overlay. A Montana mineral chain in Big Horn or Rosebud County may include interests subject to BIA-administered tribal leases with their own payor channels. Identify reservation exposure at intake.
2. Missing federal lease-file curative. As in Wyoming, federal-lease royalty flows through ONRR rather than the operator; transfer-of-payee documentation must be filed separately from the operator division-order package.
3. Trying to use the small-estate affidavit for mineral title. MCA § 72-3-1101 reaches personal property only and does not clear mineral title. Informal probate is required for any meaningful mineral interest.
4. Failing to record the deed of distribution in every situs county. Montana recording is per-county; an eastern-Bakken estate with interests in Richland, Roosevelt, and Sheridan counties requires three recordings.
5. Underestimating the eastern Bakken decline curve. Eastern Montana Bakken wells generally exhibit lower initial productivity and steeper decline than ND core wells. The appraiser working from a single year of pre-DoD royalty data may misstate sustained income; provide three to five years of stub data and operator decline-curve context where available.
Procedurally, both are UPC states with similar informal-probate machinery and similar operator workflows for the core Bakken counties. The main practical differences are: (1) Montana’s Bakken acreage is on the geologic fringe and per-well economics are typically weaker than ND-core counties; (2) Montana has more federal-leased and BIA-administered tribal-leased acreage in the southeastern counties (Big Horn, Rosebud) than ND; (3) Montana has a state income tax on royalty income that ND does not. Estate-tax handling is identical in both states (neither imposes a state estate tax).
No. Montana repealed its inheritance tax effective for deaths after January 1, 2001. There is no current Montana estate tax or inheritance tax. Federal estate tax applies if the gross estate exceeds the federal exclusion; no separate Montana filing is required at any value. Note that Montana does have a state income tax that applies to royalty income on an ongoing basis after the estate is closed.
Yes for title purposes. The Texas letters do not bind Montana real property; Montana ancillary administration must be opened in the Richland County district court. Informal ancillary probate is straightforward and typically resolves in a few months. No Montana estate-tax filing is required (Montana has no estate tax). Add time to the timeline if any acreage is federally leased.
Mineral leases on tribal land are administered by the Bureau of Indian Affairs (BIA) under federal regulations (25 CFR part 211/212/225 depending on the lease type). For non-tribal-member royalty interests subject to BIA-administered leases, transfer-of-payee documentation post-probate may require coordination with the BIA agency office and the tribal natural-resources office in addition to the operator and ONRR. The state-court probate proceeding itself is unaffected, but the post-probate operational curative path is materially longer than for purely state-fee acreage.
No. The small-estate procedure reaches personal property only and is capped at the statutory threshold (verify current MCA text). It does not clear mineral title, which is real property under Montana law. Informal probate followed by recording of the personal representative’s deed of distribution in each situs county is the standard workflow for any mineral-asset estate.
Primary sources used in writing this article. These are not legal or tax advice — they are the public statutes, regulations, and authoritative materials the article draws from. Consult a qualified attorney or CPA before acting on any of them.
Ohio is one of the few producing states where inherited mineral rights can genuinely be lost to the surface owner through inaction. The Dormant Mineral Act sets out exactly how that happens — and exactly how heirs can stop it. If your family once owned minerals in eastern Ohio, the time to check is before a notice arrives, not after.
Mississippi mineral interests — Tuscaloosa Marine Shale royalties along the southwestern fairway, legacy Mississippi Salt Basin oil and gas across the south, and shallow conventional production scattered statewide — pass through estate proceedings under the Mississippi Code (Title 91) in the chancery courts. The defining institutional feature of Mississippi mineral practice is the chancery-court system itself: equity-rooted, county-based, and procedurally distinct from the common-law probate courts found in most other states.
Arkansas mineral interests — dormant Fayetteville Shale royalties across the Arkoma fairway, legacy Smackover oil and brine in the south, and the contemporary lithium-extraction pivot in the Smackover — pass through probate under Title 28 of the Arkansas Code Annotated. The defining feature of Arkansas mineral practice is the gap between the play’s 2008–2016 Fayetteville heyday and its current low-activity baseline, which routinely surfaces unaddressed succession gaps in inherited interests.
West Virginia mineral interests — dominantly Marcellus and Utica royalties in the northern panhandle and north-central counties — pass through estate proceedings under Chapters 41 (wills) and 44 (decedents’ estates) of the West Virginia Code. The defining feature of WV mineral practice is the layered nineteenth-century severance history: an estimated 1.3 million distinct mineral interests, many traceable to severances recorded in the 1880s–1910s, generate disproportionate curative volume per estate.