"Also, I overcontributed $4163 and my refund from my 401k plan was $3876, so I'm assuming it's because of a loss in the market between contribution time and refund time." You can't net them... per this statement there was a loss on the overcontribution....
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**Mark the post that answers your question by clicking on "Mark as Best Answer" I am NOT an expert and you should confirm with a tax expert.
