What Is a Net Revenue Interest? A Buyer's Guide to NRI in Mineral Acquisitions

By Richard Partin, Managing Member, Texas State Royalties LLC Fort Worth, Texas | Published: October 8, 2026 | Last Updated: October 16, 2026

When you buy a mineral interest, you are buying the right to receive a share of the revenue from oil and gas production. But exactly how much revenue you receive — and how that share is calculated — depends on the net revenue interest (NRI). Understanding NRI before closing is not optional: a decimal interest error of even a few hundredths can represent thousands of dollars per year in royalty income on a producing well.

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Quick Answer: Net revenue interest (NRI) is the fraction of gross production revenue that flows to the working interest owner after all royalties and other burdens are paid. For mineral interest buyers, the relevant figure is the decimal interest — the NRI multiplied by the mineral ownership fraction — which determines the exact royalty payment. Under Texas Natural Resources Code, the operator is obligated to pay royalties as specified in the lease once the division order is processed.

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What Is Net Revenue Interest and How Is It Calculated?

Net revenue interest (NRI) is the fraction of gross production revenue that flows to the working interest owner (the operator) after all royalties, overriding royalty interests (ORRIs), and other burdens on the lease are paid. It is calculated as:

NRI = 1 − (sum of all royalty fractions and ORRIs burdening the lease)

For example, a lease with a 1/5 (20%) royalty and no ORRIs has an NRI of 80% for the working interest owner. A lease with a 1/5 royalty and a 2% ORRI has an NRI of 78%.

For the mineral interest buyer, the more relevant figure is the decimal interest — the fraction of gross production revenue payable to the specific mineral owner. The decimal interest is calculated as:

Decimal interest = royalty fraction × (net mineral acres ÷ gross acres in the spacing unit)

For example, a 1/5 royalty on 40 net mineral acres in a 640-acre spacing unit yields a decimal interest of 0.20 × (40/640) = 0.0125. This means the mineral owner receives 1.25% of gross production revenue from the well.

Decimal interest errors are common in estate proceedings. A 1/4 royalty on a 1/8 mineral interest equals a decimal of 0.03125, not 0.25. Always calculate and verify the decimal interest independently from the deed chain and the division order before closing. The Texas Comptroller imposes severance tax at 4.6% on oil and 7.5% on gas before the royalty reaches the mineral owner.

Why Does NRI Matter to Mineral Interest Buyers?

The NRI and decimal interest directly determine the royalty income from a producing well. A buyer who closes on an interest with an incorrect decimal interest — whether due to a deed chain error, an ORRI that was not disclosed, or a spacing unit change — will receive less royalty income than expected.

Before closing, buyers should:

• Calculate the decimal interest independently from the deed chain
• Compare the calculated decimal interest to the division order decimal
• Confirm that no undisclosed ORRIs are burdening the lease
• Verify the spacing unit acreage against Texas Railroad Commission (RRC) records
• Confirm the royalty fraction in the lease matches the seller's representations

Qualifying royalty interest owners may deduct percentage depletion at 15% of gross income from the property under IRS Publication 535, subject to the limitation that the deduction cannot exceed 100% of net income from the property. Reserve classifications follow SEC Regulation S-X Rule 4-10.

Texas State Royalties verifies decimal interests as part of the acquisition facilitation process for every buyer we work with. Start Your Buyer Search or review our acquisition services.

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Key Takeaways

• NRI is the fraction of gross production revenue flowing to the working interest owner after all royalties and ORRIs are paid; the decimal interest — royalty fraction × (NMA ÷ spacing unit acres) — is the specific figure that determines the mineral owner's royalty payment
• Decimal interest errors are common in estate proceedings; a 1/4 royalty on a 1/8 mineral interest equals 0.03125, not 0.25 — always verify independently from the deed chain and division order
• Undisclosed ORRIs reduce the NRI and the mineral owner's effective royalty; confirm no ORRIs are burdening the lease before closing
• The Texas Comptroller imposes severance tax at 4.6% on oil and 7.5% on gas; qualifying owners may deduct percentage depletion at 15% of gross income under IRS Publication 535
• Reserve classifications follow SEC Regulation S-X Rule 4-10; the PV10 income approach is the standard framework for valuing producing mineral interests
• Under Texas Natural Resources Code, the operator is obligated to pay royalties as specified in the lease once the division order is processed
• Under Texas Property Code § 1.002, mineral interests are real property; ownership is established by deed recorded in the county deed records; under Texas Estates Code, interests held individually pass through probate at death — unestablished heirship is the most common title defect in Comanche and Eastland County acquisitions

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Frequently Asked Questions

What is the difference between NRI and royalty interest?

The royalty interest is the mineral owner's fraction of gross production revenue — specified in the lease. The NRI is the working interest owner's fraction after all royalties and ORRIs are paid. For a mineral interest buyer, the decimal interest (royalty fraction × NMA/spacing unit acres) is the operative figure — it determines the exact royalty payment from a specific well.

How do I verify the decimal interest before closing?

Calculate the decimal interest independently: royalty fraction (from the lease) × (net mineral acres confirmed by title opinion ÷ spacing unit acreage from RRC records). Compare the result to the division order decimal. If they do not match, investigate the discrepancy before closing — it may indicate an undisclosed ORRI, a spacing unit change, or a decimal interest error in the division order.

What happens if the decimal interest in the division order is wrong?

If the division order decimal is incorrect, the mineral owner will receive either more or less royalty than they are entitled to. Overpayments must be repaid; underpayments must be claimed from the operator. Correcting a division order error after closing is possible but time-consuming. Verify the decimal interest before closing — not after.

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For a complete guide to reading your royalty check statement, see: How to Read a Royalty Check Statement.

About the Author

Richard Partin is the Managing Member of Texas State Royalties, a Fort Worth-based, buyer-first firm that sources producing oil and gas mineral interests through established industry relationships. He holds a degree from the University of Texas at Arlington and has years of hands-on experience in oil and gas acreage interests, working interests, and capital formation across active Texas producing regions.

Texas State Royalties facilitates mineral-interest acquisitions and works exclusively with buyers. Information is for educational purposes only and is not legal, tax, or investment advice. Buyers should consult qualified legal, tax, and financial advisors before making any acquisition decision.