The 401k is not included in the wife's estate, unless the husband also died near the same time or prior to. There is a statute of intestate succession that dictatates what should happen. My recollection is the spouse would get the first $100,000 and then split the balance 50/50. There are facts which may alter the disposition. Please call me to discuss in more detail. John Tatone 586-868-5100 ext 17