Texas courts presume that “1/8” in an old double fraction meant the whole interest. The deed’s own words can overcome that presumption. Decades of how families treated the interest can also decide ownership today.
“The usual one-eighth royalty” appears in a great many older Texas deeds. Drafters used it as shorthand and assumed everyone knew what it meant. Generations later, old 1/8 royalty language can split a share two ways.
In This Article:
- What Is the Difference Between a Fixed and a Floating Royalty?
- Why Do Courts Presume “1/8” Meant the Whole Interest?
- Why Doesn’t the Old Answer Still Hold?
- What Can Overcome the Presumption?
- Can Decades of Payments Decide Who Owns the Royalty?
- Does This Apply to Royalty Deeds or Only Mineral Deeds?
- What If You Inherited the Royalty and Live Outside Texas?
- What Does This Mean for Your Family’s 1/8 Royalty?
- Frequently Asked Questions
- Conclusion
What Is the Difference Between a Fixed and a Floating Royalty?
A fixed royalty is a set share of production. It stays the same no matter what any lease pays.
A floating royalty is a share of whatever royalty the lease provides. If the lease pays more, the floating share grows with it.
The difference adds up over time. Every month a well produces, the wrong reading pays the wrong family.
Old 1/8 royalty language can be read either way. Which reading applies decides the size of every check.
Is your family's 1/8 royalty fixed or floating?
Have a landowner-only attorney read the whole deed before you accept the operator's decimal.
Why Do Courts Presume “1/8” Meant the Whole Interest?
For decades, one-eighth was the standard landowner royalty in Texas. Many owners also believed leasing left them only one-eighth of the minerals. So “1/8” became a common way to say “all of it.”
In 2023, the Texas Supreme Court built that history into the rules. Courts now begin with a presumption about old double fractions. They presume the “1/8” stood for the whole interest, not one-eighth of it.
Under that rule, “one-half of one-eighth” starts out reading as one-half. Plain arithmetic would have said one-sixteenth. Our plain-language guide shows what it means when a deed says “one-half of one-eighth”.
Why Doesn’t the Old Answer Still Hold?
The court itself has called its 2023 framework a new legal formulation. Parties before then had not anticipated it, the court said. So a reading done before 2023 may rest on an older approach.
Earlier cases had already told courts to read the whole deed together. The 2023 rule turned the history of “1/8” into a fixed starting point.
That is no criticism of anyone who read the deed back then. Law moves, and old readings do not update themselves.
What Can Overcome the Presumption?
The court has stressed that the presumption can truly be overcome. Words elsewhere in the same deed are the main way it happens. A presumption is where the reading begins, not where it ends.
One 2026 decision showed how it works. That deed named one small fraction, then showed the double fraction as its math. Reading “1/8” as a real number, the court kept the fixed share.
No checklist settles these cases. Courts read the whole instrument and ask how each fraction fits. The court itself has said these deeds come in many variations.
Two deeds from the same county and decade can still land differently. A single clause can move the answer from fixed to floating.
Can Decades of Payments Decide Who Owns the Royalty?
Sometimes, yes. Texas courts recognize a second path called the presumed-grant doctrine. It looks at how the families actually behaved, not at the deed’s words.
Suppose one side openly claimed an interest for a long time. If the other side accepted that claim, the history can control. Courts set a high bar for it, and it can help either side.
Proving that kind of history takes old records. Memories fade with each generation, and so does the paper trail.
In the 2026 case, both sides had treated the royalty one way for decades. That history pointed the same direction as the deed’s words. Not every family’s history is that clean.
Does This Apply to Royalty Deeds or Only Mineral Deeds?
Both. The 2023 case involved a reserved share of the minerals. In 2026, the court applied the same starting point to a royalty deed.
That matters for families holding a royalty under someone else’s land. Many of those interests are a non-participating royalty interest. Whether it is fixed or floating follows that royalty into every new well.
Lower courts are still applying these rules to new wording. Small differences in phrasing have produced different results. Reading an old deed against current law is not a one-time task.
What If You Inherited the Royalty and Live Outside Texas?
Many royalty owners inherited their share and live in another state. The deed that created it may be eighty years old. It sits in a Texas county the family may never have seen.
The 2023 rule changes how that old deed reads today. A family that was paid on a fixed reading may hold a floating share. The reverse can also be true.
A probate in another state does not settle Texas mineral title. Texas law governs Texas minerals, wherever the owner lived. Heirs often learn the reading only from a division order.
That document shows the operator’s answer, not the court’s. Heirs also inherit any mistake already in the decimal. A reading set decades ago can pass through several generations untouched.
We work with royalty owners in every state. Their attorneys back home can work alongside us and keep the client relationship.
What Does This Mean for Your Family’s 1/8 Royalty?
An operator must decide how to read old language before paying anyone. That reading becomes the decimal on the division order. Owners usually see only the number, never the reasoning.
Attorney Daughtrey spent nearly a decade inside oil companies. He worked there as a licensed attorney and landman. His work included reviewing division order title opinions.
A division order title opinion is a lawyer’s written report for the operator. It states who owns each share of the well and how much. The operator builds its decimals from it.
Operators ask one question about ownership: who could come back and sue us? The title opinion answers that question for the operator. Nobody in that process is assigned to your family’s side.
A landowner-only attorney reads the same deed from the other direction. The question becomes what your family owns, not what keeps the operator safe.
Many decimals on older wells were set before 2023. A reading made then may not match today’s starting point.
When families dispute it, Texas royalty rules let the operator hold payment. Those rules sit in Chapter 91 of the Natural Resources Code.
No state agency will step in. The Railroad Commission of Texas says it has no authority over royalty payment matters. Deciding which reading fits your deed is mineral title work.
Does your family’s deed use “usual” or “1/8” royalty language? A short qualification call is the right first step.
Frequently Asked Questions
Does the presumption mean every old 1/8 royalty floats?
No. It applies only when “1/8” sits inside a double fraction. Other words in the deed can overcome it, and so can decades of history.
Is this the same as the “double fraction” question?
Yes. A double fraction is a fraction of a fraction, like “1/2 of 1/8.” Those are the deeds this presumption was built for.
Who decides which reading applies?
The deed’s text comes first. If the owners disagree, a court decides. Until then, the operator pays on its own reading or holds the money.
Division order review for Texas owners
Check the decimal against the deed before you sign.
Conclusion
Texas courts no longer read old 1/8 royalty language as simple arithmetic. They start from history, then test it against every line of the deed. The Daughtrey Law Firm focuses exclusively on representing Texas landowners and mineral owners.
If your family’s deed uses “usual” or “1/8” royalty language, a qualification call takes 10 to 15 minutes and costs nothing.
This article provides general information about Texas property law and is not legal advice for your specific situation. Reading this article does not create an attorney-client relationship. For advice about your situation, contact a qualified attorney.
