Estate planning
Loans are not a sideshow to the estate plan - they can be one of its most flexible instruments.
Intra-family loans are usually treated as a side matter, separate from the estate plan. They are more useful than that, and when ignored, they are one of the more reliable sources of conflict after a death.
Start with the mechanics. An outstanding loan to a family member is a receivable, and it is part of the lender's estate. It has a value, it will be inventoried, and somebody will inherit the right to collect it.
That single fact drives most of what follows. If a parent lends $300,000 to one child and dies with the balance outstanding, the estate now contains a claim against that child, and the other children are, in effect, inheriting the right to be repaid by their sibling.
Handled deliberately this is unremarkable. Handled by silence it is corrosive.
Any of these can be fair. What is not fair is leaving it undecided, so that the family works it out during probate.
An undocumented family loan does not merely have tax problems. At an estate it has an evidentiary problem: the person who could confirm the terms has died.
What is left is siblings with different recollections. One remembers a loan; another remembers a gift; nobody has a balance. This is among the most common sources of estate litigation, and it is entirely a records failure. See how to document a family loan properly.
Beyond avoiding harm, loans do things gifts cannot:
The most common technical failure is a will and a loan file that contradict each other: a note requiring repayment, and a will forgiving it, with no indication which controls or whether the change was intended.
Whenever a loan is made, amended or forgiven, the estate documents should be reviewed alongside it. Two records, one story.
Any family loan large enough to matter should appear in three places: a signed note, a maintained balance, and an explicit instruction in the estate plan. Families that do all three rarely have a problem. Families that do none reliably do.
General information, not tax or legal advice. Estate treatment varies by state and by document. Work with your own estate counsel.
See how Pari structures family lending.