The issue is being a W2 wage slave, err i mean employee
IMO, the basis should be as of the date of death, with any taxes due owed from the estate, not the heirs.
(It's also fairly difficult to repeatedly exploit this as a loophole, as you have to die to take advantage of it. If we're looking to close loopholes, ones that can be repeatedly applied might be more fruitful places to start.)
The IRS has no problem requiring you to maintain paperwork across generations. For example I've got some series EE savings bonds I inherited from my grandmother, where income taxes were partially paid (you can effectively switch just your savings bonds to an "accrual" accounting method with a specific election). I've got to keep track of this aspect until they mature, so I can subtract the already-taxed income on my own taxes. Same thing.
The answer to your hypothetical is that Alice would have to pay the capital gains, but only when she sold the house. Which is the same thing that would happen currently if grandpa gave away his stuff to Alice/Bob in his lifetime.
I guess I’m just not too fussed about the government not getting a lick when someone dies and would rather the family and other heirs receive whatever they’re able at what amounts to a sad time.
Eg my home has a linked list of ownership w/ cost basis details back to it's inception/root.
> grandpa gave the house to Alice and the rest of his estate to Bob"; if capital gains were due on the house, would Alice have to pay them or would Bob?
Capital gains taxes are paid when the asset is sold. When the house is sold the owner should have to pay the full capital gain tax, not the amount that has accrued since grandpa's death. If alice doesn't want to sell the house that's up to her.
Why should the fact that he transferred a minute after he died rather than 60 minutes before make a difference to the taxes owed? Sell it for a fair market price to Alice a minute before you die, then transfer the proceeds of the sale to her as part of your estate. Same effect.
> Selling everything you own the day after you die should have the same tax implications as selling everything the day before you die.
I agree with that . That's exactly why the vast majority of family homes would be passed along tax-free, with stepped-up basis (as was my point above: "the basis should be as of the date of death, with any taxes due owed from the estate, not the heirs" [which I thought earlier you "Couldn't disagree more"]).
This means a lot of society has a net negative tax rate in the sense that they consume more than they give.