Retirement Accounts and Estate Tax Planning
Successful estate planning generally involves passing on your assets to your heirs at a low tax cost. To help achieve that goal, there are a few things to keep in mind about retirement accounts.
First, tax-favored retirement accounts, such as traditional IRAs, Roth IRAs, SEP accounts and 401(k) plans, are not good candidates to use for funding bypass trusts. These trusts, which are sometimes called credit shelter trusts, are set up by married couples as estate tax minimization tools. The main advantage of a bypass trust is that the assets used to fund the trust are not included in either spouse's taxable estate for federal estate tax purposes.
Required Minimum Distribution Facts
If there are no distributions, or if the distributions are not large enough, you may have to pay a 50 percent excise tax on the amount not distributed as required.

Typically, a bypass trust is funded with assets having a value equal to no more than the current federal estate tax exemption amount ( to be $1 million in 2010). Funding of the bypass trust occurs when the first spouse passes away.
Since the objective is to "bypass" the taxable estates of both spouses, the best assets to use for funding bypass trusts are assets that are expected to appreciate. That way, any future appreciation will not be hit with estate taxes -- even after the death of the second spouse.
However, when a bypass trust is designated as the beneficiary of a tax-favored retirement account, the account generally must be liquidated under the required minimum distribution rules over the life expectancy of the oldest bypass trust beneficiary. In other words, the required minimum distribution rules turn the account into a depreciating asset.
What if the retirement account owner's estate is designated as the account beneficiary, and the account is then used to fund a bypass trust under the terms of the account owner's will? In this case, the account generally must be liquidated over an even shorter period under the required minimum distribution rules.
Bottom Line: Because of the required minimum distribution rules, tax-favored retirement accounts are basically a sub-optimal choice for funding bypass trusts. Instead, when possible, bypass trusts should generally be funded with assets expected to appreciate.
On the other hand, taxable savings vehicles that contain assets expected to appreciate, such as stocks and equity mutual funds, are good candidates for funding bypass trusts. Why? There are two reasons:
- First, funding the bypass trust with appreciating assets allows the future appreciation to escape being included in the taxable estate of either spouse.
- Second, the tax basis (for income tax purposes) of capital gain assets used to fund a bypass trust will be stepped up to fair market value as of the date of the account owner's death. So the bypass trust will have a stepped-up tax basis in the assets, which will reduce or eliminate the capital gains tax when they are later sold.


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