by bsteiner » Fri May 07, 2010 4:49 pm
The 3.8% Medicare tax affects the decision as to the Roth conversion in a couple of ways.
First, even though IRA distributions are not directly subject to the Medicare tax, they increase the modified adjusted gross income, which may push more of the investment income above the $250,000 (joint) threshold. For example, suppose a couple's only income is $300,000 of investment income. They'll pay the Medicare tax on $50,000. If they also had $100,000 of required distributions from an IRA, their total income would be $400,000, and they would pay Medicare tax on $150,000 of their investment income. They can avoid this by converting before 2013.
Second, by using their nonretirement assets to pay the tax on the conversion, they'll have less investment income, which may reduce their Medicare tax.
In addition to the Medicare tax, the 2001 and 2003 income tax rate reductions are scheduled to expire at the end of this year. The President has proposed allowing the top two brackets to revert to their pre-2001 levels (in other words, the 33% bracket would revert to 36% and the 35% bracket would revert to 39.6%), except that taxpayers with income under $200,000 (single) or $250,000 (joint) would not pay more tax than they do now. Of course, there is no way to be sure what future tax rates will be. But if future tax rates increase, that favors the Roth conversion.
Someone with income over $250,000 may want to discuss this with his/her own attorney or other advisors.