By Brad Caponigro · Founder, Pointer Petroleum LLC · Reservoir engineer
Published · Updated
This article is educational, not legal or tax advice. Estate, probate, and tax outcomes depend on your specific facts and state — consult a licensed attorney and your CPA before acting.
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Most retirees discover IRMAA the way you discover a loose step on your front porch — by tripping over it. The first clue is usually a November letter from Social Security explaining that next year's Medicare Part B premium has gone up by a few hundred dollars a month, along with a similar adjustment to Part D. The letter references a MAGI figure from a tax return filed nearly two years earlier, and for royalty owners that return was often the one with the first big completion check or the first full year of production from a newly drilled well.
IRMAA — the Income-Related Monthly Adjustment Amount — is a five-tier surcharge that Medicare adds to the baseline Part B premium and the baseline Part D premium. The tier you land in depends on your modified adjusted gross income from the tax return Social Security has most recently on file, which under normal circumstances means your return from two calendar years ago. For 2026 premiums, SSA looked at 2024 MAGI. For 2027 premiums, they will look at 2025.
Consider a retired couple in the Texas Panhandle whose horizontal wells on an inherited section first produced in 2024. Their 2024 return showed a royalty spike that pushed them from the base IRMAA tier into the third tier. In 2026, that single good year costs them several thousand extra dollars in Medicare premiums. By 2027, the well is in decline, their royalties are down, and yet their 2026 MAGI is still high enough that the 2028 premium will be affected. For many royalty owners the IRMAA cycle is always one year behind real life.
IRMAA thresholds are adjusted annually. We will not quote specific dollar amounts in a blog post that needs to age well, but here is the general structure. The first bracket sits in the low six figures of MAGI for single filers and roughly double that for joint filers. Five tiers stack above the base, with the top tier applying at very high MAGI (several hundred thousand dollars for joint filers). Part B and Part D each carry their own IRMAA surcharge, and both move together based on the same MAGI figure.
The cliff effect matters. Crossing an IRMAA threshold by a single dollar moves you to the next tier for the whole year — there is no gradual phase-in. A couple whose MAGI comes in at ninety-nine dollars over a bracket pays the same surcharge as a couple a thousand dollars over. This makes year-end tax planning particularly valuable for royalty owners whose income is lumpy. Pushing a lease bonus into the following tax year, accelerating deductions, or bunching charitable gifts can be the difference between one IRMAA tier and the next.
Social Security will use your two-year-old return as the default, but the Medicare Premium Adjustment provisions let you request a recalculation if you experienced a "life-changing event" that reduced your income. The list of qualifying events is finite — marriage, divorce or annulment, death of a spouse, work stoppage, work reduction, loss of income-producing property, loss of pension income, and receipt of an employer settlement.
For mineral owners, two of these commonly apply. "Work stoppage" covers full retirement from your W-2 career. "Loss of income-producing property" can cover a sale of minerals or a dramatic, sustained decline in production that is not just a routine decline curve — the SSA guidance here is fact-specific and an appeal officer has discretion. The form is SSA-44, one page plus documentation, and it is filed by mail or in person at a field office. Many retired owners qualify and never know it. If you had a large royalty spike in 2024 and you retired in 2025 or sold your interest in 2025, it is worth the half hour it takes to file.
The Net Investment Income Tax — NIIT — was enacted in 2010 as part of the Affordable Care Act and took effect in 2013. It imposes a 3.8% tax on the lesser of your net investment income or the amount by which your MAGI exceeds a threshold. The thresholds are $200,000 for single filers and $250,000 for joint filers, and unlike almost every other tax threshold, they are not indexed to inflation. They have not changed in more than a decade.
For most royalty owners, NIIT is a straightforward additional 3.8% on royalty income above the threshold. It sits on top of the regular federal income tax, so a retiree in the 32% bracket with royalty income above the threshold is paying an effective 35.8% federal rate on each additional royalty dollar. When you add state income tax — up to 13% in California, about 6% in Oklahoma, nothing in Texas — the total on a marginal royalty dollar runs into the mid-to-high 40% range.
NIIT applies to passive royalty income. It generally does not apply to a working-interest owner who materially participates in the oil-and-gas business, because that income is treated as non-passive earned income. Most royalty owners hold royalty or overriding royalty interests, not working interests, and cannot claim this exception. But a modest number of owners — particularly family-held partnerships that elected to participate in an earlier generation — hold working interests alongside royalty interests, and the active-participation test is worth reviewing with a CPA.
The related wrinkle is that a pure royalty interest with no operating obligations almost never qualifies as a trade or business for NIIT purposes, even if the owner is active in managing the interest. The "material participation" test under Section 469 is specific and hard to satisfy without actual operating involvement. This is one of the areas where well-meaning tax advice from a generalist CPA can miss the mark.
A few strategies help royalty owners manage the IRMAA and NIIT drag.
First, coordinate big-ticket events. If you are planning a partial sale, a Roth conversion, or a large capital gains realization, model it across several tax years rather than concentrating it in one. For a couple close to an IRMAA bracket, splitting a $500,000 transaction across two tax years can save more in Medicare premiums than the deal's legal fees.
Second, use bunching. Charitable gifts, deductible medical expenses, and state tax payments (up to the SALT cap) can sometimes be timed to concentrate in a high-income year, pulling MAGI down below an IRMAA threshold.
Third, watch the Social Security claiming decision. The taxability of Social Security benefits is MAGI-dependent, and for royalty owners with meaningful royalty income, a delayed claiming strategy can interact with IRMAA in non-obvious ways. A fee-only planner who runs the numbers for both together is worth the consultation fee.
Finally, document your basis. If you eventually sell, a high basis means lower capital gains, lower MAGI in the sale year, and a lower IRMAA spike two years later. Owners who inherited minerals should have a date-of-death valuation in the file, because that is the stepped-up basis you will subtract from the sale price. An appraisal done contemporaneously is much more defensible than one reconstructed years after the fact.
IRMAA uses your MAGI from two years prior. So a royalty spike in a single tax year affects your Medicare premium for that one future year, unless the spike recurs. If you had a large royalty year in 2024, your 2026 Medicare premium reflects it; your 2027 premium will reflect your 2025 MAGI instead, which presumably is lower.
Yes. The capital gain from a sale of mineral rights is generally treated as net investment income for NIIT purposes, so if your MAGI after the sale exceeds the threshold ($200,000 single / $250,000 joint), you will owe 3.8% on the smaller of the gain or the excess over the threshold. For owners with large gains on long-held minerals, NIIT can add up. Spreading a sale across installment payments in some cases moderates the impact, but installment treatment has its own complications and is worth modeling with a CPA.
No. Both IRMAA and NIIT are federal and do not vary by state of residence. State income tax does vary — if you own minerals in Oklahoma but live in Texas, Oklahoma non-resident income tax still applies to the royalty, but Texas charges no state income tax on the same income. So state-of-residence moves can reduce state-level tax but not the federal IRMAA or NIIT drag.
Yes, depletion reduces your taxable royalty income and therefore your AGI and MAGI. For most individual royalty owners, the 15% statutory percentage depletion applies. Depletion is one of the most valuable tax items available to royalty owners, and if your tax preparer is not claiming it, you are overpaying. Make sure your CPA is using percentage depletion where you qualify — it directly reduces the MAGI that drives both IRMAA and NIIT.
Primary sources used in writing this article. These are not legal or tax advice — they are the public statutes, regulations, and authoritative materials the article draws from. Consult a qualified attorney or CPA before acting on any of them.
A retired owner in Florida collecting royalties from Oklahoma and New Mexico owes state income tax to both Oklahoma and New Mexico — even though Florida has no income tax. The rules vary, the withholding is inconsistent, and the paperwork surprises most retirees who inherit multi-state interests.
Roth conversions let retirees shift taxable retirement dollars into tax-free accounts. For mineral owners, variable royalty income makes timing essential — a conversion in the wrong year can cost more in tax than it saves in a lifetime.
For owners with appreciated mineral interests and charitable intent, giving the minerals (rather than selling and donating the cash) often delivers more to the charity and more tax benefit to the donor. The right structure depends on whether you need current income from the gift.
The gap between early retirement and Medicare eligibility is often covered by an ACA marketplace plan. Royalty income can eliminate the subsidies that make those plans affordable — with a few thousand dollars of income swinging thousands of dollars of coverage cost.