Capital gains count as income for Medicare premium calculations, and they can push you into a higher bracket even if your wages stay the same
When you sell an investment at a profit, that gain becomes part of your modified adjusted gross income (MAGI) — the figure Medicare uses to set your premiums. If your capital gains push your MAGI above certain thresholds, you will pay a higher percentage of the standard premium for Part B (doctor visits) and Part D (prescription drugs). The thresholds are the same for everyone, but they do not adjust for inflation, so more people cross them each year.
This matters most if you are newly retired and selling stocks or real estate to live on, or if you inherited investments and are liquidating them. A single sale can move you into a higher bracket for the next two years — Medicare uses your income from two years prior to set your current premiums, with a lag that catches many people off guard.
Key Takeaways
- Medicare calculates your Part B and Part D premiums based on your modified adjusted gross income from two years before, which includes both long-term and short-term capital gains.
- If your MAGI exceeds $97,000 (single) or $194,000 (married filing jointly) in 2024, you will pay a surcharge on top of the standard premium, with higher brackets at $121,000, $145,000, and above.
- Long-term capital gains (assets held over one year) are taxed at a lower rate than short-term gains, but both count toward your Medicare income threshold in full.
- You can request a reduction in your premiums if your income dropped significantly after the year Medicare used to calculate them, using Form SSA-44.
- Timing the sale of investments and using tax-loss harvesting or charitable giving can reduce your MAGI, but these strategies require planning before the sale, not after.
How Medicare Measures Your Income for Premium Purposes
Medicare does not use your current-year income. Instead, it looks back two years. If you are paying premiums in 2024, Medicare is using your 2022 income. This two-year lag means a large capital gain in 2022 will affect your 2024 and 2025 premiums, even if you have no capital gains in 2023 or 2024.
The income figure Medicare uses is your modified adjusted gross income (MAGI), which is your adjusted gross income (AGI) plus any tax-exempt interest. For most people, MAGI and AGI are the same. Capital gains — both long-term (held over one year) and short-term (held one year or less) — are included in full in your AGI, so they raise your MAGI dollar for dollar.
Medicare sends you a notice each year showing the income it used and your resulting premium. The notice arrives in November for premiums that take effect in January. If the income shown is wrong or your circumstances have changed, you have a window to dispute it.
The Income Thresholds and Premium Brackets for 2024
Medicare has five income brackets for Part B and Part D premiums. The standard premium is the lowest bracket. Once you cross the first threshold, you pay the standard premium plus a surcharge that grows with each bracket. The thresholds for 2024 are:
| Income Bracket (MAGI) | Single Filer | Married Filing Jointly | Premium Surcharge |
|---|---|---|---|
| Bracket 1 (lowest) | Up to $97,000 | Up to $194,000 | Standard premium only |
| Bracket 2 | $97,001–$121,000 | $194,001–$242,000 | Standard + 35% surcharge |
| Bracket 3 | $121,001–$145,000 | $242,001–$290,000 | Standard + 50% surcharge |
| Bracket 4 | $145,001–$169,000 | $290,001–$338,000 | Standard + 65% surcharge |
| Bracket 5 (highest) | $169,001+ | $338,001+ | Standard + 80% surcharge |
These thresholds have not changed since 2011, even though inflation has nearly doubled. That means more retirees cross them each year. A single capital gain of $30,000 can move a single filer from Bracket 1 to Bracket 2, raising their Part B premium by roughly $35 per month and their Part D premium by roughly $12 per month — for two years.
When a Capital Gain Triggers a Premium Increase
You are most vulnerable to a premium jump if you are newly retired and selling stocks or real estate to fund living expenses. A $100,000 home sale or stock liquidation in your first year of retirement will affect your Medicare premiums in years two and three of retirement, when you may have already adjusted your budget downward.
The timing of the sale matters because of the two-year lookback. If you sell in December 2022, that gain affects your 2024 and 2025 premiums. If you sell in January 2023, it affects your 2025 and 2026 premiums. Shifting a sale by a few weeks can move the impact to a different pair of years, which sometimes matters if you know your income will be lower in one year than another.
Inherited investments are another common trigger. If you inherit a brokerage account and liquidate it within the first year or two of inheriting it, the gains count toward your MAGI. The step-up in basis (the rule that resets the cost basis of inherited assets to their value on the date of death) reduces the taxable gain, but the gain still counts for Medicare purposes.
Strategies to Reduce the Impact of Capital Gains on Your Premiums
The most direct approach is to spread large sales over multiple years. Instead of selling $100,000 of stock in one year, sell $50,000 in year one and $50,000 in year two. This keeps your MAGI lower in each year and may keep you below a threshold entirely.
Tax-loss harvesting — selling investments at a loss to offset gains — reduces your net capital gain and therefore your MAGI. If you have losses in one account, you can use them to offset gains in another. Losses that exceed gains in a year can be carried forward to future years, further reducing future MAGI.
Charitable giving of appreciated securities is another option. If you donate stock directly to a charity instead of selling it and donating the proceeds, you avoid the capital gain entirely and still receive a charitable deduction. This works best if you have appreciated securities and are charitably inclined.
Roth conversions and other tax-planning moves can also affect your MAGI, but they are complex and depend on your full tax picture. A tax professional or financial planner can model different scenarios before you execute a large sale.
How to Request a Premium Reduction if Your Income Dropped
If your income in the current year is significantly lower than the income Medicare used to set your premiums, you can request a reduction. This is common for retirees who had a large capital gain in the lookback year but no gains in the current year.
You request a reduction using Form SSA-44 (Request for Change in Medicare Part B Premium), available from Social Security or online. You will need to provide proof of your current-year income — usually a recent tax return, a letter from your employer, or a statement from your brokerage showing no sales.
Social Security reviews the form and decides whether your income has dropped enough to warrant a lower premium. The process typically takes four to six weeks. If approved, the reduction is usually retroactive to the month you requested it, not the month you filed the form.
This is worth doing if the reduction will save you more than the cost of gathering documents and submitting the form. For someone in Bracket 2, a $20,000 income drop might save $10 to $15 per month — roughly $120 to $180 per year — which makes the effort worthwhile.
The Difference Between Long-Term and Short-Term Capital Gains
Long-term capital gains (assets held over one year) are taxed at a lower federal rate than short-term gains (assets held one year or less). Long-term gains are taxed at 0%, 15%, or 20% depending on your income bracket, while short-term gains are taxed as ordinary income at rates up to 37%.
However, both long-term and short-term gains count in full toward your Medicare MAGI. A $10,000 long-term gain and a $10,000 short-term gain both add $10,000 to your MAGI, even though the long-term gain will cost you less in federal income tax. This means the tax advantage of long-term gains does not extend to Medicare premiums.
This is worth knowing if you are deciding when to sell an investment. Holding it over one year saves you federal income tax but does not reduce the Medicare premium impact. The decision to hold or sell should be based on your overall tax situation, not just the Medicare piece.
Frequently Asked Questions
Can I appeal my Medicare premium if I think the income used is wrong?
Yes. Medicare sends you a notice each November showing the income it used. If the amount is incorrect — for example, if your tax return shows a different figure — you can contact Social Security to request a correction. Bring a copy of your tax return as proof. The correction is usually processed within 30 days.
Does Roth conversion income count toward my Medicare premiums?
Yes. When you convert money from a traditional IRA to a Roth IRA, the amount converted is added to your AGI and therefore your MAGI. A $50,000 conversion raises your MAGI by $50,000 for that year. This is a major reason to plan Roth conversions carefully and often to do them in years when your other income is low.
What if I sell my home — does the gain count toward Medicare premiums?
Yes, but there is an exclusion. If you are single, you can exclude up to $250,000 of gain on the sale of your primary home. If you are married filing jointly, you can exclude up to $500,000. The gain above the exclusion counts toward your MAGI. Most home sales do not trigger a gain large enough to matter, but in high-appreciation areas, they can.
If I request a premium reduction, will Medicare refund the overpayment?
If your request is approved, Social Security will refund the overpayment, usually by reducing your future premiums rather than sending a check. The refund is typically applied starting the month you requested the change, not the month you filed the form. Ask Social Security how they will process the refund when you submit your form.
Do I have to report capital gains to Medicare directly?
No. Medicare gets your income information from the IRS using your tax return. You do not report capital gains to Medicare separately. Your tax return is the source of truth, so make sure it is accurate and filed on time.