A Couple With $2 Million in IRAs Pays Medicare’s Standard Premium. The Year After One Spouse Dies, the Survivor Pays Roughly $1,000 to $2,500 More for the Same Income, and Here’s How Advisors Prepare for It Before Either Spouse Is Sick

Consider a composite couple, both 75, with $2 million spread across their traditional IRAs. In 2026 each pays Medicare Part B’s standard premium of $202.90 a month, and nothing about their income draws Medicare’s attention.

Then one spouse dies. The survivor keeps nearly the same income but now files a single return, and Medicare’s single-filer surcharge threshold is half the joint line. About $1,000 to $2,500 a year in extra Part B premiums follows. Advisors who see it coming plan for it while both spouses are healthy.

How a $2 Million IRA Couple Stays Under Medicare’s Joint Line

Here are the assumptions, all for tax year 2026. At 75, the couple’s required minimum distribution (RMD) uses a Uniform Lifetime Table divisor of 24.6, so $2 million forces out about $81,300. They collect $60,000 a year in Social Security, $36,000 of it from the larger check, plus $20,000 in taxable interest and dividends from a brokerage account.

At this income, the tax code makes 85% of Social Security taxable (26 U.S.C. § 86(a)(2)), so $51,000 of benefits counts. Their modified adjusted gross income (MAGI), the figure Medicare uses, comes to about $152,300.

The joint standard-premium level runs up to $218,000. They have about $65,700 of room.

Widow’s Penalty Hits When the Return Flips to Single

In the year of death, the survivor can still file jointly. The next year, the return says single, and the single standard level ends at $109,000.

Income barely moves. The survivor rolls the spouse’s IRA into their own, and at 76 the divisor shrinks, so the RMD on $2 million rises to about $84,400. The investment income continues. Only the smaller Social Security check disappears, leaving $30,600 of taxable benefits. Survivor MAGI: about $135,000.

That lands in the first surcharge level. Part B rises from $202.90 to $284.10 a month, an extra $974 a year. Part D adds another $14.50 a month on top of the drug plan’s premium.

Fast-forward to 80. If growth keeps the balance near $2 million, the divisor of 20.2 forces out about $99,000, driving MAGI near $149,600. Part B becomes $405.80 a month, an extra $2,435 a year, plus $37.50 a month in Part D surcharges.

Medicare prices each year’s premium off the tax return from two years earlier, so the first single return sets a bill that arrives long after the estate paperwork is done. Level are inflation-indexed, so the exact lines will shift by then.

Income tax tightens too. In 2026 the 24% bracket starts at $105,700 of taxable income for singles versus $211,400 for joint filers.

Three Moves Advisors Make While Both Spouses Are Healthy

1. Roth conversions up to the joint line. That about $65,700 of headroom lets the couple convert traditional IRA dollars to a Roth each year at joint rates. Every converted dollar shrinks future RMDs, and qualified Roth withdrawals stay out of gross income (26 U.S.C. § 408A(d)(1)). Conversions count as income the year they happen, so advisors size them to stay under the level that conversion year will set.
2. Qualified charitable distributions (QCDs). IRA owners past age 70½ can send money straight to charity, meeting the RMD while keeping it out of gross income under 26 U.S.C. § 408(d)(8). A survivor who routes $30,000 of the RMD to charity drops MAGI to about $105,000, back under the line. The statute’s base cap is $100,000, indexed for inflation.
3. Beneficiary design and disclaimers. Naming children or a charity as partial IRA beneficiaries, or letting the survivor disclaim part of the account within nine months, moves RMD income off the survivor’s return. Children generally must empty an inherited IRA within 10 years, so this works best when they sit in lower brackets.

Where Form SSA-44 Helps a Widow and Where It Falls Short

A spouse’s death counts as a life-changing event on Form SSA-44, which asks Social Security to price the premium from a more recent, lower-income year. It helps when the death cuts income, such as a lost pension. When income holds steady and only the filing status changes, the form offers little relief, which is why advisors tackle the issue years in advance (we laid out the surcharges and the other premium traps retirees miss in a free Medicare guide here).

Medicare’s income-related surcharge (IRMAA) is federal, but state taxes on the survivor’s income vary by state. This joint-versus-single analysis is worth running with a CPA or fiduciary tax advisor while both names are still on the return.

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