As part of his proposed tax plan, President Trump plans to repeal the "death tax" a controversial tax that affects the wealthiest .002% of Americans. For reasons described below, the repeal will not be permanent. This makes estate tax planning, with the unpredictable timing of death—perhaps decades away, extremely difficult. Wealthy individuals should not assume that repeal makes estate tax planning unnecessary. Nor should they continue to make irrevocable transfers without considering all of the possible tax outcomes over the decades to come.

The proposed legislation is extremely unlikely to garner the 60 Senate votes needed to avoid the reconciliation process. Given the extent of the proposed tax cuts (estimated at $3-7 trillion) and the parallel push for spending on infrastructure, including the border wall, the legislation will not be deficit neutral. Therefore, the tax cuts will "sunset" 10 years after their effective date, and existing law will be reinstated.

Sound familiar? This is the path that President Bush took with EGTRA in 2001. The 12 years that followed EGTRA (including the 2 year "patch" which deferred the sunset until 2013), made planning extremely difficult. In 2001, the amount each person could pass free of estate tax (the "exemption") was $1 million and the highest tax rate on additional assets was 55%. As of 2012, the exemption was $5 million ($ 10 million per couple) and the rate had dropped to 35%. That year, wealthy individuals and their advisors scrambled to make irrevocable gifts to use their exemptions before they disappeared. In the end, President Obama signed "ATRA," which provided for "permanent" tax reform: an exemption of $5 million subject to inflation (for 2017 the exemption is $5.49 million) and a rate of 40%.

Wealthy individuals may once again be in the unenviable position of guessing what the law might be ten years from the effective date of the Trump tax act, and having to calculate how likely it might be that they (and spouse) will die during the repeal. If the estate tax returns before the client dies, ten additional years of growth, particularly if the client owns a closely held business, could mean tens of millions of dollars in taxes that could have been avoided through smart leveraging of the exemption.

Well advised individuals will continue to pursue lifetime gifting options. Low interest rate assumptions, coupled with structures like Grantor Retained Annuity Trusts (GRATs) and Installment Sales to Intentionally Defective Grantor Trusts (IDGTS) can easily move tens of millions of value "off ledger" and into irrevocable trusts that can perpetually avoid having the assets be subject to the estate and generation skipping transfer tax. Further, valuation discounts are not going away anytime soon, as Treasury's priorities have changed with the new Administration. Notwithstanding the need to plan for the potential return of the estate tax, the terms of any irrevocable structures should be flexible so that the planning can be reversed. Planning should be binary–working towards minimizing estate taxes if relevant, while also retaining the ability to modify or even reverse the planning if estate taxes are irrelevant. It makes sense now more than ever to ensure that trust documents incorporate provisions allowing modifications through powers given to trustees, directed parties or trust protectors, and through powers of appointment and other rights that can be given to trust beneficiaries. Binary planning can allow wealthy individuals to protect against estate taxes without wondering whether they will later regret that decision.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.