The Mineral Rights His Grandfather Held Back in 1949 Finally Paid Out. Medicare Counted Every Royalty Check.
When a well finally hits on land your grandfather sold decades ago, the royalty checks feel like found money. What surprises many retirees is how quickly Medicare notices them too.
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A retiree in his early 70s opens the mail and finds a royalty check large enough to cover a car payment. His grandfather kept the mineral rights when he sold the surface acres of the family farm in 1949, and more than 75 years later, an operator finally drills a producing well.
The checks are welcome. What he may not expect is their second life on his tax return. Unlike a one-time sale that can produce one unusually expensive Medicare year, royalties can keep arriving as long as the well produces. If they lift his income high enough, the Medicare surcharge can follow them.
Why Royalty Income Can Stick to the Premium
For 2026, the income-related monthly adjustment amount (IRMAA) begins above $109,000 of modified adjusted gross income (MAGI) for a single filer and $218,000 for a married couple filing jointly. Medicare generally looks two years back, so 2026 premiums are normally based on 2024 income. Royalty income received in 2026 would ordinarily enter the calculation for 2028.
Oil, gas and mineral royalties are generally taxable as ordinary income and reported on Schedule E. After allowable expenses and depletion, the taxable amount feeds into adjusted gross income (AGI). For IRMAA, MAGI is generally AGI plus tax-exempt interest. That is where an old mineral deed can become a new Medicare expense. If production continues year after year, the income can continue showing up in the returns Medicare later uses. The surcharge is recalculated annually, so it can fall when production declines or disappear if income drops below the threshold.
2026 IRMAA Brackets in Real Dollars
The standard Part B premium is $202.90 per month in 2026. For a married couple filing jointly, the higher-income tiers look like this:
| Joint MAGI from 2024 return | Part B total, per person | Part D IRMAA, per person |
|---|---|---|
| $218,001 to $274,000 | $284.10 | $14.50 |
| $274,001 to $342,000 | $405.80 | $37.50 |
| $342,001 to $410,000 | $527.50 | $60.40 |
| $410,001 to under $750,000 | $649.20 | $83.30 |
| $750,000 or more | $689.90 | $91.00 |
Suppose a couple’s usual MAGI is $200,000 and the royalty stream pushes it to $260,000. Each spouse moves into the first IRMAA tier, adding $81.20 a month to Part B and $14.50 to Part D. Together, that is roughly $2,300 in additional Medicare costs for the year.
If the royalties keep the couple above that threshold, the expense can return with each annual premium determination. That is what separates a producing mineral interest from a windfall that hits once and disappears. IRMAA is one of several premium traps we mapped in a free Medicare guide.
Depletion Can Take Some of the Sting Out
The tax code does provide some help. Eligible independent producers and royalty owners can generally use a 15% percentage-depletion rate for oil and gas, subject to tax-law limits. Depletion reduces the taxable income from the property before it reaches AGI. It can soften the Medicare effect. It does not guarantee the royalty income disappears from MAGI altogether.
There is another limit worth knowing. Form SSA-44 can lower IRMAA when income falls after certain life-changing events, including the death of a spouse, retirement or an involuntary loss of income-producing property. A healthy well suddenly sending more royalty income is not one of them. Widowhood can create the opposite problem. Once a surviving spouse begins filing single, the first IRMAA threshold is only $109,000. A royalty stream that fit comfortably inside a joint return can suddenly take up much more room.
Give the Royalty Checks Some Company Carefully
Before adding other income to a year when the wells are producing heavily, consider these three steps:
- Project the year’s MAGI before taking a large capital gain or making a Roth conversion that could stack more income on top of the royalties.
- Have the tax preparer confirm that every allowable depletion deduction and royalty-related expense is being captured on Schedule E.
- If charitable giving is already part of the plan and the IRA owner is eligible, ask whether a qualified charitable distribution could satisfy the gift without adding an IRA withdrawal to AGI.
Grandfather’s decision in 1949 may turn out to be a remarkably good one. The trick now is making sure a mineral right held for generations does not produce a Medicare surprise right alongside the oil.
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Gerelyn Terzo is the author of dividend investing handbook "Dividend Investing Strategies: How to Have Your Cake & Eat It Too." A veteran financial journalist, she covers agri-finance for outlets like Global AgInvesting and the broader stock market and personal finance for 24/7 Wall Street. She began at CNBC and later helped launch Fox Business in New York. Gerelyn currently resides in Woodland Park, Colorado and dabbles in nature photography as a hobby.
