When an advisor tells a mineral owner that their royalty can be exchanged for an apartment building, it can sound too good to be true — a quirky loophole rather than settled law. It isn't. The treatment of oil and gas interests as like-kind real property rests on a substantial body of IRS revenue rulings and tax-court decisions built up over more than half a century. These authorities establish that perpetual mineral and royalty interests are real property, that they're like-kind to fee interests in conventional real estate, and where the line falls for finite interests like production payments. Understanding the actual authorities — not just the conclusion — helps an owner and their advisers approach an exchange with confidence and recognize the cases where eligibility is genuinely uncertain. This guide walks through the foundational rulings, the key cases, and what they mean in practice.
The foundational IRS position
The IRS's foundational position is that perpetual oil and gas interests are interests in real property for federal tax purposes, following the characterization most producing states give them. This position is expressed in a line of revenue rulings. Revenue Ruling 68-226 held that a perpetual royalty interest in producing oil and gas is real property. Revenue Ruling 73-428 recognized that royalty interests can be exchanged like-kind. Together, these establish the baseline that perpetual royalties are real property eligible for Section 1031 treatment.
The position rests on the durational character of the interests. Because a perpetual mineral or royalty interest continues for the life of the reserve with no fixed endpoint, it has the open-ended quality the law associates with real-property ownership — like a fee estate in land. The IRS rulings reflect this reasoning, treating the continuing nature of the interest as the key to its real-property status, consistent with how state property law generally classifies minerals.
This foundational position is what makes mineral exchanges possible at all. Without it, minerals couldn't be exchanged like-kind, because Section 1031 applies only to real property. With it, perpetual mineral and royalty interests sit squarely within the like-kind regime, exchangeable for other real property of all kinds. The rulings aren't obscure or marginal — they're the settled basis on which mineral 1031 exchanges have been done for decades, and they're what an advisor relies on when telling an owner their perpetual royalty qualifies.
Royalties and leaseholds held like-kind to fee real estate
A particularly important ruling for cross-asset exchanges is Revenue Ruling 68-331, which addressed whether a leasehold interest in a producing oil and gas lease could be exchanged like-kind for a fee interest in conventional real estate. The IRS held that it could — that the oil and gas leasehold (an interest in real property extending until the minerals are exhausted) is like-kind to a fee interest in improved real estate. This ruling is the authority behind the powerful proposition that minerals and ordinary real estate can be exchanged for one another.
The significance is broad. Revenue Ruling 68-331 confirms that the like-kind standard's breadth applies across the minerals-to-real-estate boundary: an interest in producing oil and gas and a fee interest in a building or land are both real property held for investment, and therefore like-kind. This is what lets a royalty owner exchange into an apartment building, or a real estate investor exchange into minerals — the cross-asset bridge this series describes rests substantially on this ruling's reasoning.
Combined with Revenue Ruling 68-226 (perpetual royalties as real property), the authority establishes both halves of the typical mineral exchange: the mineral interest is real property, and it's like-kind to conventional real estate. An owner exchanging a perpetual royalty for a DST holding apartments is relying on exactly this line of authority — the minerals qualify as real property, and they're like-kind to the real estate the DST holds. The rulings turn what sounds like a loophole into a well-grounded transaction.
Rev. Rul. 68-331 holds a producing oil and gas leasehold is like-kind to a fee interest in real estate — the authority behind exchanging minerals for buildings.
Overrides and the duration analysis in the rulings
Revenue Ruling 72-117 addressed overriding royalty interests, treating them as real property capable of like-kind exchange. This extended the real-property characterization beyond perpetual mineral royalties to overrides carved from the working interest — important because overrides are common, and the ruling provides authority that they too can be exchanged. But the ruling operates within the duration framework: an override's eligibility ultimately depends on whether it has the continuing character of a real-property interest, which ties back to the underlying lease's life.
The rulings collectively reveal the IRS's analytical approach: it characterizes oil and gas interests by their nature and duration, treating open-ended, continuing interests as real property and finite ones differently. This is why the body of authority is internally consistent — perpetual royalties (68-226), royalty exchanges (73-428), leasehold-to-fee exchanges (68-331), and overrides (72-117) all qualify because they share continuing, real-property character, while production payments are treated as debt under Section 636.
For an owner, the practical value of understanding the duration thread in the rulings is recognizing which side of the line their interest sits on. The favorable rulings cover perpetual and continuing interests; the unfavorable treatment (Section 636 and the production-payment authorities) covers finite, capped ones. An advisor applying these authorities to a specific interest is really asking whether it fits the continuing-interest pattern the favorable rulings address, or the finite pattern the unfavorable ones do — which is the perpetual-interest rule expressed through the case law and rulings.
Where courts drew the line
The courts and the IRS drew the clearest line at production payments. The landmark case Commissioner v. P.G. Lake, Inc., decided by the Supreme Court, held that the assignment of an oil payment right (a production payment) in exchange for value produced ordinary income, treating the production payment as essentially a right to a defined sum of future income rather than a sale of a continuing property interest. This reasoning — that a carved-out, finite payment right is more like an assignment of income or a financing arrangement than ownership of real property — underlies the later codification in Section 636.
Section 636, enacted to provide clearer rules, treats production payments as mortgage loans for tax purposes, cementing the line the courts had been drawing. The combined effect of the case law and the statute is that production payments — finite, capped rights to a defined sum or volume — fall outside the real-property characterization and thus outside Section 1031. This is the firm boundary on the unfavorable side: capped, self-liquidating interests are debt, not exchangeable real property.
Between the clearly-favorable perpetual interests and the clearly-unfavorable production payments lies the uncertain middle — term royalties, short-dated overrides, and net profits interests whose characterization depends on their specific facts. The authorities don't provide a bright-line rule for every such interest, which is why these require case-by-case analysis and, often, a professional opinion. The line the courts drew is clearest at the extremes; the middle ground is where careful, fact-specific analysis against the body of authority is needed.
What the rulings mean for your exchange
For an owner, the body of authority translates into a practical hierarchy of confidence. A perpetual mineral or royalty interest sits on the firmest ground — the favorable rulings (68-226, 73-428, 68-331) directly support its real-property status and like-kind exchangeability, including for conventional real estate. An owner exchanging a clean perpetual royalty can proceed with well-grounded confidence, knowing the transaction rests on decades of settled authority rather than an aggressive interpretation.
An override has supportive authority (72-117) but with a duration caveat — its eligibility depends on the underlying lease's life, so a long-lived, production-held override is well-supported while a short-dated one is shakier. A net profits interest or term royalty sits in the uncertain middle, where the authorities don't give a clear answer and a professional opinion analyzing the specific interest is essential. A production payment is clearly on the unfavorable side — the case law and Section 636 put it outside Section 1031.
The overarching lesson is that the favorable treatment of minerals isn't a loophole or a marketing claim; it's a well-developed area of tax law with clear authority for the common cases and recognized uncertainty for the unusual ones. This should give owners of perpetual interests confidence to exchange, and owners of finite or unusual interests appropriate caution to seek an opinion. Knowing where your interest falls in this hierarchy of authority — firm, caveated, uncertain, or excluded — is what lets you and your advisers approach the exchange with the right level of confidence.
- Perpetual oil & gas interests are real property under settled IRS rulings (68-226, 73-428) — not a loophole.
- Rev. Rul. 68-331 establishes that producing oil & gas leaseholds are like-kind to fee real estate, enabling cross-asset exchanges.
- Rev. Rul. 72-117 covers overrides, subject to a duration caveat tied to the lease.
- P.G. Lake and §636 draw the firm line: production payments are debt, outside Section 1031; the middle ground needs case-by-case analysis.
Using the authority in practice
Knowing the authorities exist is useful, but using them well means applying them to your specific interest with professional help. For a clean perpetual royalty, the authority is settled enough that a full legal opinion may be unnecessary — the transaction rests on well-established rulings. For anything in the caveated or uncertain categories, an opinion that explicitly analyzes the interest against these authorities is what gives the exchange its defensibility, documenting why the interest qualifies (or flagging that it doesn't).
The authorities also guide documentation. An exchange of a perpetual royalty should be papered to reflect its real-property character; an override exchange should document the underlying lease's longevity; an uncertain interest's exchange should be supported by the opinion analyzing it. If an exchange is ever examined, this documentation — grounded in the rulings and cases — is what demonstrates the transaction was well-founded rather than aggressive. The authority isn't just background; it's the foundation the exchange's defensibility is built on.
Finally, the authorities help owners and advisers avoid the two opposite errors: excessive caution (declining to exchange a clearly-qualifying perpetual interest out of unfounded worry) and excessive aggressiveness (exchanging a finite interest the authorities don't support). Knowing what the rulings actually hold lets you proceed confidently where the law is clear and seek an opinion where it isn't — calibrating your confidence to the actual state of the authority, which is exactly what sound exchange planning requires.
A quick reference to the authority
It helps to hold the authority in mind as a simple hierarchy, from firmest to excluded. On the firmest ground are perpetual mineral and royalty interests: Revenue Rulings 68-226 and 73-428 establish them as real property eligible for like-kind exchange, and Revenue Ruling 68-331 confirms they're like-kind to fee interests in conventional real estate. An owner exchanging a clean perpetual royalty for a building or DST is squarely supported here and can proceed with confidence.
On supportive-but-caveated ground are overriding royalty interests, covered by Revenue Ruling 72-117 but subject to the duration analysis tied to the underlying lease. A long-lived, production-held override is well-supported; a short-dated one is shakier. In the genuinely uncertain middle sit term royalties and net profits interests, where no bright-line authority controls and a professional opinion analyzing the specific interest is essential before exchanging.
On excluded ground are production payments: Commissioner v. P.G. Lake and Section 636 treat them as debt — assignments of income or loans — placing them outside Section 1031 entirely. This four-tier map — firm (perpetual interests), caveated (overrides), uncertain (term royalties, NPIs), excluded (production payments) — captures the practical state of the authority. Locating your interest on this map, with your adviser, tells you immediately how much confidence the law supports and whether you need a formal opinion to proceed.
How Baker 1031 helps you rely on the authority
Baker 1031 Investments helps mineral owners and their advisers apply this body of authority to their specific interests — recognizing when an interest sits on the firm ground of the favorable rulings, when it carries a duration caveat, and when it falls in the uncertain middle requiring a professional opinion. We coordinate with your tax adviser so the exchange rests on the actual authority appropriate to your interest, with documentation to match.
Where a qualifying interest is exchanged into a DST, those securities are offered through the broker-dealer, Aurora Securities, Inc. (member FINRA/SIPC), with any recommendation following a suitability review. Our role is to help you proceed with confidence where the law is settled — as it is for perpetual royalties — and with appropriate caution where it isn't, so your exchange is grounded in the decades of rulings and cases that make mineral 1031s well-founded transactions rather than aggressive bets.
Frequently Asked Questions
Is exchanging minerals under Section 1031 a loophole?
No. It rests on decades of settled IRS rulings and tax-court decisions establishing that perpetual oil and gas interests are real property and like-kind to other real estate. Revenue Rulings 68-226, 73-428, 68-331, and 72-117, among others, provide the authority. It's a well-developed area of tax law, not an aggressive interpretation.
What does Revenue Ruling 68-226 hold?
That a perpetual royalty interest in producing oil and gas is real property for federal tax purposes. This is a foundational ruling establishing that perpetual royalties qualify as real property eligible for Section 1031 treatment, based on the continuing, open-ended character of the interest.
What does Revenue Ruling 68-331 establish?
That a leasehold interest in a producing oil and gas lease can be exchanged like-kind for a fee interest in conventional real estate. It's the authority behind exchanging minerals for buildings or land — confirming that oil and gas interests and ordinary real estate are both real property and therefore like-kind to each other.
What is Revenue Ruling 72-117 about?
It treats overriding royalty interests as real property capable of like-kind exchange, extending the real-property characterization to overrides carved from the working interest. The ruling operates within the duration framework, so an override's eligibility still depends on whether it has continuing, real-property character tied to the underlying lease's life.
Can I really exchange a royalty for an apartment building?
Yes — that's supported by the authority. Revenue Ruling 68-226 establishes the royalty as real property, and Revenue Ruling 68-331's reasoning confirms oil and gas interests are like-kind to fee real estate. So a perpetual royalty can be exchanged for conventional real estate (including a DST holding apartments), deferring the gain, on well-grounded authority.
What was the P.G. Lake case about?
Commissioner v. P.G. Lake, Inc. was a Supreme Court case holding that the assignment of an oil payment right (a production payment) for value produced ordinary income, treating the production payment as essentially a right to defined future income rather than a sale of continuing property. Its reasoning underlies the treatment of production payments as financing, later codified in Section 636.
Where do the authorities draw the line against eligibility?
At production payments. The case law (P.G. Lake) and Section 636 treat capped, self-liquidating production payments as debt — assignments of income or loans — rather than real property, putting them outside Section 1031. This is the firm boundary: finite, defined-recovery interests are debt, not exchangeable real property.
Are net profits interests and term royalties covered by clear authority?
No — they sit in the uncertain middle. The favorable rulings cover perpetual interests and the unfavorable authorities cover production payments, but term royalties and net profits interests don't have bright-line authority. Their eligibility depends on their specific facts and how closely they resemble continuing versus finite interests, so they require case-by-case analysis and usually a professional opinion.
Do I need a legal opinion to exchange a perpetual royalty?
For a clean perpetual royalty, the authority is settled enough that a full opinion may be unnecessary — the transaction rests on well-established rulings. For caveated interests (overrides) or uncertain ones (term royalties, NPIs), a written opinion analyzing the interest against these authorities is what provides defensibility. Match the level of formal analysis to the interest's position in the authority.
How do the rulings affect my documentation?
They guide it. An exchange of a perpetual royalty should be papered to reflect its real-property character; an override exchange should document the lease's longevity; an uncertain interest should be supported by an opinion. If examined, this documentation — grounded in the rulings and cases — demonstrates the transaction was well-founded, which is the defensibility the authority provides.
Does the 2017 tax law change these authorities?
The Tax Cuts and Jobs Act limited Section 1031 to real property only, which didn't disturb the treatment of perpetual mineral and royalty interests (they were real property all along). It did eliminate personal-property exchanges, affecting the equipment in working interests. The core authorities establishing perpetual interests as exchangeable real property remain intact.
What's the practical takeaway from all this authority?
Calibrate your confidence to the interest. A perpetual royalty rests on firm, settled authority — proceed confidently. An override carries a duration caveat. A term royalty or NPI is uncertain — get an opinion. A production payment is excluded. Knowing where your interest falls in this hierarchy lets you and your advisers approach the exchange with the right level of confidence.
Is a revenue ruling binding law?
A revenue ruling is the IRS's official interpretation applied to a set of facts, and taxpayers can generally rely on it for substantially similar facts. It isn't a statute or court decision, but it carries significant weight and reflects the IRS's position. For mineral exchanges, the favorable rulings give owners and advisers a solid basis to treat perpetual interests as exchangeable real property.
Why does Rev. Rul. 68-331 matter so much?
Because it's the authority that producing oil and gas leaseholds are like-kind to fee interests in conventional real estate — the legal basis for exchanging minerals for buildings or land. Without it, the cross-asset bridge between minerals and ordinary real estate would be far less certain. It's why a royalty owner can confidently exchange into an apartment DST.
Do these authorities apply in every state?
The federal rulings establish the like-kind treatment, but they build on state-law characterization of minerals as real property, which most producing states share. In an unusual state that characterized an interest differently, the analysis could vary. For typical interests in producing states, the federal authorities apply straightforwardly; for edge cases, your adviser checks the relevant state's treatment.
Could the IRS change its position on mineral exchanges?
The authorities are long-settled and widely relied upon, so a sudden reversal is unlikely, but tax law can change through legislation, regulation, or new rulings. The 2017 TCJA, for instance, narrowed 1031 to real property only without disturbing perpetual interests. Owners should rely on current authority while staying aware, through their advisers, of any developments.
Should I keep documentation of the authority for my exchange?
Yes — especially for caveated or uncertain interests. Documenting why your interest qualifies, grounded in the relevant rulings and (for unusual interests) a professional opinion, is what demonstrates the exchange was well-founded if it's ever examined. For a clean perpetual royalty the authority is settled, but keeping the analysis on file is good practice for any mineral exchange.
Glossary
- Revenue Ruling
- An official IRS interpretation of the tax law applied to a set of facts, providing authority for taxpayers.
- Revenue Ruling 68-226
- Holds that a perpetual oil and gas royalty interest is real property for federal tax purposes.
- Revenue Ruling 68-331
- Holds that a producing oil and gas leasehold is like-kind to a fee interest in conventional real estate.
- Revenue Ruling 72-117
- Treats overriding royalty interests as real property capable of like-kind exchange.
- Revenue Ruling 73-428
- Recognizes that royalty interests can be exchanged like-kind.
- Commissioner v. P.G. Lake, Inc.
- A Supreme Court case treating a production payment assignment as ordinary income, underlying §636.
- Section 636
- The Code section treating mineral production payments as loans rather than real-property interests.
- Like-Kind
- The standard requiring exchanged property to share the character of real property held for investment.
- Perpetual Interest
- An open-ended interest with continuing, real-property character; favored in the rulings.
- Production Payment
- A capped right to a fixed sum or volume of production, treated as debt and outside Section 1031.
- Leasehold Interest
- An interest created by an oil and gas lease, held like-kind to fee real estate under Rev. Rul. 68-331.
- Overriding Royalty Interest (ORRI)
- A royalty carved from a working interest; real property subject to a duration caveat.
- Net Profits Interest (NPI)
- A share of net proceeds; in the uncertain middle of the authority, requiring case-by-case analysis.
- Tax Court
- The federal court hearing tax disputes, whose decisions form part of the like-kind authority.
- Assignment of Income
- The doctrine, applied in P.G. Lake, treating certain transfers as ordinary income rather than property sales.
- Defensibility
- The degree to which an exchange's treatment is supported by authority and documentation if examined.
Sources & References
- IRS. Revenue Ruling 68-226 (perpetual royalty as real property)
- IRS. Revenue Ruling 72-117 (overriding royalty interests)
- U.S. Supreme Court (Justia). Commissioner v. P.G. Lake, Inc., 356 U.S. 260 (1958)
- Cornell Legal Information Institute. 26 U.S. Code § 636 — Mineral production payments
Disclosures
This article is published by Baker 1031 Investments, LLC for general educational purposes for accredited investors and is not an offer to sell or a solicitation of an offer to buy any security, nor is it tax, legal, accounting, or investment advice or a recommendation. Any securities offering is made solely through a sponsor’s private placement memorandum (PPM) following a suitability determination. Securities offered through Aurora Securities, Inc. (ASI), member FINRA / SIPC; Baker 1031 Investments is independent of ASI.
Oil & gas mineral and royalty interests and DST programs are speculative, illiquid securities sold only to verified accredited investors and involve substantial risk, including possible loss of principal, commodity-price and production-decline risk, lack of control, and the risk that an intended 1031 exchange fails to qualify for tax deferral. Whether a particular interest qualifies as like-kind real property is a fact-specific legal determination that varies by state and by the terms of the instrument. Tax results depend on your individual circumstances. Consult your own CPA and attorney before acting. Past performance does not guarantee future results.
