Stop doing this if you're sitting on a large unrealized gain.
Selling might be the most expensive decision you ever make.
Most people think they have two options: sell and pay the tax, or hold and feel uncomfortable about the concentration.
There's a third option. And it could eliminate the entire gain permanently.
It's called the step-up in basis.
Here's how it works. When you pass away and leave an appreciated investment to an heir, the IRS resets the cost basis to the fair market value on the date of your death. The old basis disappears.
Your heir inherits it as if they bought it at today's price.
A simple example:
You bought stock for $50,000. It's worth $500,000 today. If you sell, you owe roughly $107,000 in federal capital gains tax, before state taxes. You walk away with about $393,000 to reinvest.
If you hold it and pass it to your heirs, they receive it with a $500,000 basis. They sell it the next day. Capital gains tax owed: zero. The $450,000 gain you spent years carrying is permanently wiped out.
And if you need income or want to diversify without triggering the gain, there are ways to work around it:
•Borrow against the position through securities-backed lending
•Contribute shares to a donor-advised fund and take a full deduction
•Use tax-loss harvesting to offset a partial sale over time
•Gift shares to lower-income family members in a lower capital gains bracket
One important note: this only applies to taxable brokerage accounts, not IRAs or 401(k)s. Those are taxed as ordinary income when heirs withdraw regardless.
But if you're holding appreciated assets in a taxable account, understand this strategy before you make any decision to sell.
In many cases, the right answer isn't to sell at all.