How Much Tax Does a 70-Year-Old Owe Diversifying $500,000 in JPMorgan Stock?

A $500,000 stake in a single bank stock is concentration risk by any standard. For a retiree, it means one company’s credit cycle, rate exposure and regulatory circumstances drive a large share of household wealth. Here is what it costs a 70-year-old to sell off that exposure in tax year 2026, and why the cheapest-looking path depends on Medicare as much as on the IRS.

A Career-Long Position Now Worth $500,000

Take a hypothetical widower who built a stake in JPMorgan Chase (NYSE:JPM | JPM Price Prediction) over a banking career. He files single, and the shares sit in a taxable brokerage account with a total cost basis of $95,000. That leaves an unrealized long-term gain of $405,000.

The stock traded at $343.88 the morning of Thursday, Nov. 12. It is up 5.65% year to date, up 7.32% over a year and up 106.09% over the past five years. Its 52-week range runs from $275.06 to $364.68, and it trades at about 14x trailing earnings. In September, JPMorgan raised its quarterly dividend to $1.65 from $1.50, which sets the forward annual payout at $6.60 a share. On roughly 1,455 shares, that comes to about $9,607 a year.

The net unrealized appreciation rule covers only employer stock distributed in kind from a 401(k). Because these shares already sit in a brokerage account, the $95,000 basis is what sets the tax.

What Selling Everything in 2026 Costs

The math needs one assumption: $75,000 of other 2026 ordinary income from a pension, IRA withdrawals and taxable Social Security. For tax year 2026, single filers pay 0% on long-term gains while taxable income stays at or below $49,450. They pay 15% up to $545,500 and 20% above that. Even after the 2026 standard deduction of $16,100 and the extra amount for filers 65 and older, his ordinary income fills the 0% band. His total taxable income also stays under the 20% line, so the entire gain is taxed at 15%.

Next comes the Net Investment Income Tax. It equals 3.8% of the smaller of net investment income or the amount by which modified adjusted gross income (MAGI) exceeds the threshold (26 U.S.C. § 1411(a)(1)). For single filers, the threshold is set in the law at $200,000 (§ 1411(b)(3)). The sale raises his MAGI to $480,000.

Federal income taxes alone take about 14.3% of the position, and state tax comes on top in most states. The new senior deduction of up to $6,000 starts phasing down once MAGI exceeds $75,000, so a sale year this large uses it up. It is one of several income-linked rules that quietly bite retirees in a sale year, the kind we charted in a free tax trap map.

Medicare’s Surcharge Shows Up 2 Years Later

Medicare sets income-related surcharges from tax returns filed two years earlier, which means a 2026 sale hits his 2028 premiums. The 2028 brackets have not been published yet, so the 2026 CMS table is the closest guide. At $480,000 of MAGI, he lands in the level above $205,000 and under $500,000. There, Part B costs $649.20 a month instead of the standard $202.90, and Part D adds $83.30 a month. He sits just under the top level, which starts at income over $500,000. A larger position or more outside income would push him into it.

4 Ways to Stage the Exit

1. Sell Gradually Across Tax Years

Selling $100,000 of stock a year for five years realizes about $81,000 of gain each year and holds MAGI near $156,000. That stays under the $200,000 threshold, so the 3.8% surtax disappears. The 15% gains tax comes to $12,150 a year. The catch is Medicare: each of those years lands in the $137,000 to $171,000 level, which costs about $2,884.80 a year. The five-year total is about $75,174, compared with $77,745.20 for a single sale. That assumes a flat share price and unchanged brackets. The real tradeoff is five more years of single-stock exposure.

2. Sell in Lower-Income Years

Years before required minimum distributions begin, or years with smaller IRA withdrawals, leave more room under the brackets. To stay in the no-surcharge Medicare level at or below $109,000, only about $34,000 of gain fits each year on $75,000 of other income. At that rate, the exit would take close to 12 years.

3. Donate Appreciated Shares

Giving shares directly to a charity or a donor-advised fund avoids the gain on those shares. Deductions for capital gain property given to public charities are capped at 30% of the contribution base (26 U.S.C. § 170(b)(1)(C)(i)). Starting in 2026, itemizers can deduct only the charitable gifts that exceed 0.5% of AGI. Qualified charitable distributions can come only from IRAs, so they cannot move these shares. They can still cover giving that would otherwise be paid from the brokerage account.

4. Hold and Collect the Dividend

Holding postpones every dollar of tax and keeps the roughly $9,607 annual dividend coming in. Heirs would generally receive a stepped-up basis equal to the shares’ value at death under 26 U.S.C. § 1014(a)(1), a rule covered in more detail in Tax: Inheritance. The cost of holding is the concentration itself. On the October 13 earnings call, CFO Jeremy Barnum said “the conditions we have had recently, where essentially every part of the franchise is beating records, are not typical by historical standards.” Chairman and CEO Jamie Dimon added, “We are tightening up credit a little bit.”

What to Watch For Before Year-End

Operating results give holders a reason to stay. Third-quarter net income was $15.3 billion, and EPS came in at $5.57. Management’s own caution about normalization gives sellers a reason to act. Dec. 31 closes the 2026 tax year, so any shares sold before then count toward this year’s brackets and the 2028 Medicare lookback. Shares sold in January start a new year with fresh 0% and 15% room. If JPMorgan moves sharply before then, the gain and every number above move with it.

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