Mineral & Royalty Glossary

Mineral ownership comes with its own vocabulary. Below are plain-English definitions of the terms mineral and royalty owners most often need — including the specific interest types American Royalty Buyers purchases. Each links to a fuller guide.

Overriding Royalty Interest (ORRI)

An ORRI is a cost-free share of production revenue carved out of the working interest (the leasehold) rather than the mineral estate. The holder receives a percentage of revenue without paying drilling or operating costs, but the interest is tied to a specific lease and expires when that lease terminates.

Non-Participating Royalty Interest (NPRI)

An NPRI is a royalty carved out of the mineral estate that gives the holder a cost-free share of production revenue but no executive rights — no right to lease, no bonus, and no delay rentals. It is generally perpetual because it is tied to the mineral estate rather than to a single lease.

Non-Operated Working Interest

It is an ownership stake in an oil and gas lease where another company operates the wells. You own a share of production and pay your share of drilling and operating costs through joint interest billings, but you do not run operations or make the development decisions.

Net Revenue Interest (NRI)

A net revenue interest (NRI) is the share of production revenue an owner actually receives after royalties and other burdens are deducted. For a working interest, NRI = working-interest percentage × (1 − total royalty burden); for a royalty owner it is the royalty decimal itself.

Division Order

A division order is a document an operator sends to confirm how a well's revenue is divided, stating each owner's decimal interest and asking the owner to verify ownership and tax details before payments begin. In Texas it confirms payment information and does not change the lease.

Lease Bonus

A lease bonus is the up-front, one-time payment a mineral owner receives for signing an oil and gas lease, typically quoted per net mineral acre and separate from the ongoing royalty. It compensates the owner for granting the lease during its primary term.

Mineral Rights (Mineral Interest)

Mineral rights (a mineral interest) are the ownership of the oil, gas, and other minerals beneath a tract of land, separate from the surface. A mineral owner holds the right to lease the minerals, receive lease bonus and royalties, and share in production — and can sell or bequeath the interest independently of the surface.

Royalty Interest

A royalty interest is a cost-free share of production revenue reserved to the mineral owner under an oil and gas lease. The royalty owner receives a fraction of production (commonly 1/8 to 1/4) free of drilling and operating costs, but does not pay expenses or make operating decisions.

Working Interest

A working interest is the operating interest in an oil and gas lease — the right to explore, drill, and produce, together with the obligation to pay a proportionate share of the costs. Working interest owners receive revenue net of the royalty burden but bear drilling, operating, and plugging costs.

Net Mineral Acre (NMA)

A net mineral acre (NMA) is an owner's proportional ownership of the minerals under one acre of land. If you own a 1/8 mineral interest in a 640-acre tract, you own 80 net mineral acres (640 × 1/8). NMA is the foundational unit of mineral rights valuation.

Decimal Interest

A decimal interest is the fractional share of a well's revenue an owner is paid, expressed as a decimal. It is calculated as your net mineral acres divided by the unit acres, multiplied by your royalty rate, multiplied by your tract participation, and it appears on your division order and check stub.

Held by Production (HBP)

Held by production (HBP) means an oil and gas lease continues in force beyond its primary term because a well on the lease — or a unit that includes it — is producing in paying quantities. As long as production continues, the lease stays alive and the owner keeps receiving royalties under its terms.

Severance Tax

A severance tax is a state tax on oil and gas as it is produced (severed) from the ground, usually a percentage of the sale value. It is withheld from revenue before owners are paid and appears as a deduction on royalty check stubs; rates vary by state (for example, Texas taxes oil and gas at different rates).

Surface Rights

Surface rights are the ownership of the land's surface — the right to build, farm, and occupy — as distinct from the mineral rights beneath. Where the two are severed, the mineral estate is generally dominant, meaning the mineral owner or its lessee has the reasonable right to use the surface to access and produce the minerals.

Primary Term

The primary term is the initial fixed period of an oil and gas lease — commonly three to five years — during which the lessee has the right to drill. If a well producing in paying quantities is completed before it ends, the lease continues into its secondary term (held by production); if not, the lease typically expires.

Delay Rental

A delay rental is a payment an operator makes to keep a lease in force during its primary term without drilling. Many modern leases are "paid-up," meaning the bonus covers the entire primary term and no separate delay rentals are owed.

Shut-in Royalty

A shut-in royalty is a payment that keeps a lease alive when a well is capable of producing in paying quantities but is temporarily not producing or selling — for example, while awaiting a pipeline connection. Paying the shut-in royalty substitutes for actual production to hold the lease.

Pooling & Unitization

Pooling and unitization combine multiple tracts or interests into a single drilling or production unit so a well can be developed efficiently, with each owner sharing revenue in proportion to their acreage in the unit. Your decimal interest reflects your net mineral acres divided by the total unit acres.

Suspended Royalties (Suspense)

Suspense means an operator is holding an owner's royalty payments rather than paying them out — usually because of a title question, an ownership change, a missing tax form, or a bad address. Once the issue is resolved, the accrued funds are released.

Depletion Deduction

Depletion is a federal income-tax deduction that lets a mineral or royalty owner recover the value of the resource as it is produced and sold. For most royalty owners, percentage depletion allows a set percentage of gross royalty income to be deducted each year, subject to IRS rules.

Step-Up in Basis

A step-up in basis resets the cost basis of inherited mineral rights to their fair market value on the date of the previous owner's death. This can substantially reduce or eliminate the capital-gains tax an heir owes when selling shortly after inheriting.

Payor

A payor is the company that issues your royalty check. It is often not the operator you associate with the well — operators pay through subsidiaries and keep legacy or acquired-company names after mergers — so the payor name on your stub may differ from the company running the wells.

Spud

To spud a well is to begin drilling it. The spud date is when the drill bit first breaks ground, typically weeks to months after the drilling permit is filed and well before first production and the royalties that follow.

Fair Market Value

Fair market value (FMV) is the price mineral or royalty interests would sell for between a willing buyer and seller, neither under compulsion. For minerals, FMV reflects production and decline, net mineral acres, operator activity, formations, and commodity prices — the same factors ARB weighs in a free valuation.

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