Summary and Background. On March 28, 2022, the Biden Administration proposed a 20% minimum tax on individuals who have more than $100 million in assets. The minimum tax would be based on all economic income (which the proposal refers to as “total income”), including unrealized gain. The tax would be effective for taxable years beginning after December 31, 2022. The minimum tax would be fully phased in for taxpayers with assets of $200 million or more.
Under the proposal, an individual’s 2023 minimum tax liability would be payable in nine equal annual installments (e.g., in 2024-2032). For 2024 and thereafter, the minimum tax liability would be payable in five annual installments. The tax may be avoided by giving away assets to section 501(c)(3) organizations (including private foundations or donor advised funds) or 501(c)(4) organizations before the effective date of the legislation so as to avoid the $100 million threshold.
The Biden proposal is an attempt to appeal to Senator Joe Manchin (D-W.Va.) and address some criticisms of Senator Ron Wyden’s (D-Or.) mark-to-market proposal. Senator Manchin has expressed support for a minimum 15% tax on individuals, and this support was apparently an impetus for the proposal. Senator Manchin has not, however, expressed support for a mark-to-market minimum tax, and the Biden Administration does not appear to have received any support from Senator Manchin before releasing its proposal.
The five-year payment period is an attempt to address concerns that Wyden’s proposal might overtax volatile assets, and to “smooth” taxpayers’ cash flows without the need for the IRS to issue refunds. Under the Biden Administration’s proposal, installment payments of the minimum tax may be reduced to the extent of unrealized losses.
The minimum tax is being described as a “prepayment” that may be credited against subsequent taxes on realized income. This description provides a backup argument on constitutionality: the minimum tax isn’t a tax on unrealized income but is merely a prepayment of tax on realized income.