US tax rules for gift from parent to adult child?

Correction (past edit window) to my post: not $5.25M each. $5.25M total.

Getting a brokerage statement shouldn’t be too hard. I can probably also get a date of original purchase by my parents, though I’m not sure what sort of document would satisfy the IRS if an audit happened.

Not likely to be a problem: my dad tells me this is one of his best performing funds.

The amount in question is $10,000.

Let me clarify: You need not only the date it was purchased but the amount it was purchased for. And if your parents had the dividends automatically reinvested or the shares did something funky like a return of capital, the details of each such transaction would also be needed to accurately determine the tax due on sale. That would be the same documentation your parents would need if they sold it themselves.

If it was purchased in a typical brokerage account, that would be a broker’s statements. If it was purchased from a private party, a cancelled check or bank statement. If it was bought directly from a mutual fund company, they probably have some record (unless it was REALLY long ago) which may disappear when your parents close their account, so if your parents didn’t keep a copy of their old statements, it would be wise to contact the mutual fund company (or broker) to see if they can look up the data for you and send you something before your parents close their account.

I realize it seems boorish to make demands for paperwork when someone is trying to do you a favor and give you a present. Unfortunately, you need that sort of documentation. As I said, it’s no different than the documents your parents would have needed if they sold the shares themselves. Try to approach the topic in an apologetic way and blame the IRS. In any case, the worst that can happen is you’ll pay some unnecessary taxes if you get audited and can’t back up your basis claims.