Retirees Who Pay the Standard Medicare Premium Can Spend $200,000 a Year Without Ever Crossing the Surcharge Line. Roth Withdrawals, Reverse Mortgage Checks, Life Insurance Loans, and Home Sale Proceeds Under $500,000 Are All Invisible to IRMAA

Medicare’s income surcharge has a blind spot, and it’s wide enough to fit a $200,000 spending year.

The surcharge, called IRMAA (the income-related monthly adjustment amount), is set by one number on your tax return. Cash that never hits that number can’t raise your premium. Qualified Roth withdrawals, reverse mortgage advances, most life insurance policy loans, and excluded home-sale gain all stay off that line.

One Line on Your Tax Return Sets Your Medicare Bill

Social Security defines IRMAA income in its operations manual as adjusted gross income (line 11 of Form 1040) plus tax-exempt interest (line 2a). It uses older returns: 2026 premiums are generally based on 2024 tax return information.

For 2026, the standard Part B premium is $202.90 a month for single filers with MAGI up to $109,000 and joint filers up to $218,000. Go $1 over and you’re in the next level: $284.10 a month, plus a $14.50 Part D surcharge. The jump hits all at once, with no phase-in.

How a Retiree With $96,000 of Income Spends $200,000

Take a 70-year-old widow filing single in 2026. She’s a composite, built for the math. She receives the average retired-worker benefit of $2,071 a month, or $24,852 a year, and takes $75,148 from her traditional IRA.

At her income, the maximum 85% of her Social Security is taxable under Section 86, so $21,124 of it lands in AGI. Her MAGI comes to $96,272. She stays at the standard premium.

Then she spends another $100,000 that never shows up in her MAGI:

If that extra $100,000 had come out of her traditional IRA, her MAGI would hit $196,272, which falls in the level that starts above $171,000. At 2026 rates, her Part B premium would go from $202.90 to $527.50 a month, and Part D would add $60.40. That’s $4,620 more a year before any income tax, and the bill would arrive two years later.

Why Roth, Reverse Mortgage and Policy Loan Cash Stays Hidden

• Roth IRA: Under Section 408A(d)(1), a qualified distribution “shall not be includible in gross income.” To be qualified, you must be at least 59½ and past the five-year period that starts with your first Roth contribution.
• Reverse mortgage: HUD’s counseling handbook says HECM “loan advances are not taxable and do not affect Social Security or Medicare benefits.” Borrowers must be 62 or older. The money is a loan, though: the balance grows, and you pay it back when you leave the home.
• Life insurance loan: Section 72(e)(5) keeps the rule that treats loans as distributions away from ordinary life insurance policies. Borrowing against your cash value creates no income.

Home Sale Gain Up to $500,000 Never Touches Your Premium

Section 121 excludes up to $250,000 of gain on a home sale, or $500,000 on a joint return. You must have owned the home and lived in it as your main residence for 2 years of the last five. The cap applies to your profit, not the sale price. If our widow sells for $700,000 a house with a $450,000 basis, her $250,000 gain is excluded in full.

Four Traps That Pull Hidden Money Back Into MAGI

• Muni bond interest escapes income tax, but IRMAA adds it back.
• Home gain above the exclusion counts in full in the year you sell.
• An expired or surrendered policy with a loan still outstanding can create taxable income on everything above the premiums you paid, all in one year. Policies classified as modified endowment contracts tax loans as distributions from the start.
• Early Roth withdrawals that tap earnings before the five-year period runs out can be taxable.

Three Moves to Make Before Your Next Lookback Year

1. Plan by source each December. Take taxable withdrawals up to just under your IRMAA level, then cover the rest of your spending from sources that don’t count.
2. Convert to Roth in low-income years. The converted amount counts toward MAGI in the year you convert. The Roth withdrawals it pays for later won’t.
3. File Form SSA-44 if your income dropped after retirement, a spouse’s death, or another qualifying life event. Social Security can then base your premium on your current income instead of the return from two years ago.

Choosing which account to draw from each year affects your income taxes, your Medicare premiums and what your heirs receive (IRMAA is only one of the surcharges retirees walk into, and we covered the rest in a free Medicare guide here). It’s worth working out with a tax or financial professional before the year ends.

Contact [email protected] for any questions or corrections.