Usually less than owners expect, and dramatically less on inherited minerals sold soon after a death. Here is the framework, the four things that actually move the number, and the traps that catch people who sold without asking first.
Selling a mineral or royalty interest you have held more than a year is generally a sale of a capital asset, taxed at long-term capital gains rates rather than ordinary income rates. That distinction alone is usually the difference between a tax bill in the teens as a percentage and one at your top marginal rate.
The arithmetic is: sale price, minus your basis, minus selling costs, equals gain. What people get wrong is almost always the basis.
This is also why selling can be more tax efficient than continuing to receive royalties. Royalty income is ordinary income every year, reduced by a depletion allowance. Sale proceeds are capital gain once. Two owners with identical interests can face meaningfully different lifetime tax outcomes depending on which path they take.
| How you acquired it | Your basis is generally | Practical result |
|---|---|---|
| Inherited | Fair market value at the date of death | Sell soon after death and the gain is often near zero |
| Gifted during the giver's life | The giver's basis, carried over | Frequently near zero basis, so nearly the whole price is gain |
| Purchased | What you paid, reduced by depletion taken | Straightforward, but keep the closing documents |
| Owned by the family for generations | Often effectively zero, and unprovable | Assume nearly the entire price is gain unless a step-up occurred |
The step-up in basis at death is the most valuable rule in this entire area and the one most often wasted. An heir who sells inherited minerals within a year or two of the death frequently recognizes almost no taxable gain, because the sale price and the stepped-up basis are close to the same number. The same heir who holds for twenty years and then sells pays capital gains on two decades of appreciation.
To use the step-up you need evidence of date-of-death value. Not a guess made later. Our mineral appraisal page covers what a defensible date-of-death appraisal contains, and we prepare them whether or not you sell to us. If you inherited minerals recently and have not established that value, that is the single highest-value thing on your list.
If you have been receiving royalties and taking the percentage depletion deduction, which nearly every royalty owner does, that deduction has been reducing your basis year after year. On sale, a portion of the gain equal to the depletion you deducted is generally recaptured and taxed as ordinary income rather than capital gain.
It is not a reason to avoid selling. It is a reason to have your CPA calculate the real after-tax number rather than assuming the whole gain gets capital gains treatment. On a long-held producing interest the recapture piece can be a meaningful share of the total.
Two states can want a piece: the one you live in and the one the minerals are in. Oklahoma taxes nonresidents on income from Oklahoma property, including gain on the sale of Oklahoma minerals, so an out-of-state seller generally files an Oklahoma nonresident return. Your home state usually gives a credit for tax paid to Oklahoma, so you are rarely taxed twice, but you do file twice. Texas has no state income tax, which is one reason Texas mineral sales are simpler. See out-of-state owners.
Four that come up regularly. Each requires real planning with a CPA before closing, not after.
Corrections we give often:
Send check stubs or a deed. We will value the interest, and if it was inherited we will tell you what a date-of-death valuation would look like. Free, no obligation, and we are glad to talk to your accountant directly before you decide anything.
Get a Free Valuation Date-of-Death AppraisalsBerlin Royalties is a mineral buyer and a landman shop in Tulsa. We are not accountants, tax advisors, or attorneys, and none of this is tax advice about your situation. Tax law changes, rates and thresholds change, and the right answer depends on facts we cannot see. Talk to a CPA who has handled mineral sales before you sign anything. Last reviewed August 2026.