Suppose T earns $150,000 of W2 income and $150,000 as a self-employed consultant. What is T's maximum SEP IRA contribution for 2010?
The maximum appears to depend on T's self-employment tax, which means the typical calculations given on popular websites for the maximum SEP contribution are incorrect: T's self-employment tax is lower than that of a person who has no W2 income, for T has paid all her Social Security taxes from her wage income. Accordingly, my impression is that the SEP contribution will be larger for T than for, as an example, someone who earns the same amount of SE income but with no wage income.
Thanks for any thoughts.