The Estate-Tax Blind Spot in Buy, Borrow, Die

Buy, Borrow, Die is an income-tax strategy, and for an estate below the $15 million / $30 million exemption that is the whole game — the step-up erases the gain and nothing else is owed. Above the exemption the arithmetic changes in a way the strategy’s popular framing never mentions.

The assets you refused to sell sit in your gross estate at full fair market value, appreciation included. So you avoided a 23.8% federal capital-gains-plus-NIIT charge on that appreciation and delivered it instead to a 40% estate tax. On the taxable slice, holding was the more expensive choice. The correct response is not to abandon the strategy — it is to recognize that Buy, Borrow, Die and the freeze techniques above are complements, not alternatives. Borrow-and-hold handles the income tax on what stays in your estate; GRATs, IDGT sales, and intrafamily notes move the appreciation out of the estate entirely so there is less to tax at 40%. A household running only the first has optimized the smaller number.

The debt deduction, and the trap inside it. There is a genuine offset. Debt outstanding at death is deductible from the gross estate under IRC §2053, “Expenses, indebtedness, and taxes”, so a $5 million line drawn against your portfolio reduces the taxable estate by $5 million and saves $2 million at a 40% rate.

Read that carefully before celebrating, because the deduction only helps if the proceeds are gone. Borrow $5 million and leave it in a bank account and your estate holds $5 million of cash against $5 million of debt — a net change of zero. The estate-tax benefit materializes only to the extent the borrowed money was spent on consumption you would otherwise have funded by selling appreciated assets, or was gifted out of the estate. Borrowing to spend shrinks the taxable estate; borrowing to hold cash does nothing at all.