How Many Net Royalty Acres Do I Own?

You can count your own net royalty acres in about four steps, using three records most owners already have in a folder or can request from the county.

Where does the number come from when a buyer says you own a certain number of NRA? It comes from records, and you can reproduce it. The deed gives the acreage, the lease gives the royalty, and the division order gives the decimal the operator actually pays on.

Below are two routes to the same answer, then a worked example and the mistakes that most often throw the count off. Set a pen and a calculator next to the paperwork and follow along.

Step 1: Pin down net mineral acres from the deed

Open the deed or the title opinion and find two facts: the acreage of the tract and the fraction of the minerals you hold. Multiply them. A 160-acre tract where you own one quarter of the minerals gives 40 net mineral acres. If you share ownership with siblings after an inheritance, use your own fraction of the family's share, not the whole family interest.

Check the deed for reservations and exceptions. A prior owner may have kept half the minerals when selling the land, and that language reduces what the current deed holder owns. When a document is unclear, the county clerk's recorded copy is the version that counts.

Step 2: Read the royalty fraction in the lease

Find the royalty clause of your lease. It will state a fraction or percentage, often 1/8, 3/16, 1/5, or 1/4. Multiply that fraction by 8 to get the multiplier. A 3/16 royalty yields 1.5 and a 1/5 royalty yields 1.6.

If the lease includes different royalty rates for different depths or products, write each down and note which acreage it covers. The count can differ by zone.

Step 3: Multiply for the first answer

Net mineral acres times the multiplier gives your NRA. Using the example from Step 1, 40 NMA at 3/16 equals 40 times 1.5, which is 60 NRA. Write that number down as your lease-based count.

Step 4: Check it against the division order decimal

Now run the second route. Take the decimal from the division order or royalty statement for a well in your unit. The formula is NRA equals the owner decimal multiplied by the gross unit acres multiplied by 8. If your decimal is 0.01171875 and the unit covers 640 gross acres, the result is 0.01171875 times 640 times 8, which is 60 NRA.

The two routes agree here, and that agreement is the point. When they disagree, one input is wrong. The operator may use a different NMA than your deed shows, the unit acreage may differ from what you assumed, or the decimal on file may include another burden.

Mistakes that change the count

The most common error is using gross acres where net acres belong, which inflates the count. The second is applying the royalty fraction of the lease to the entire tract even when you own only a share of the minerals. The third is adding up NRA from several wells that sit on the same acreage. A decimal belongs to one well, while the tract belongs to one count.

Another trap is mixing leased and unleased acreage. Unleased minerals have no lease royalty, so any NRA figure attached to them is an assumption. Finally, check that the unit acres you used match the order that formed the unit. Two wells in one section can sit in units of different sizes.

Royalty interests carved out of a deed need their own care. If a prior owner reserved a fraction of the royalty rather than a share of the minerals, the fraction may be fixed or may float with whatever the lease pays, and the wording in the reservation decides which. Read that language slowly before applying the multiplier, and talk to your attorney if the clause can be read two ways.

When you have several tracts

Owners with more than one tract run the steps once per tract and add the results. Keep a short list with the tract description, NMA, royalty fraction, multiplier, and NRA, plus the source document for each line. That list is a property file in its simplest form, and it makes any offer comparison faster.