<prompt> Human: My work has a 401k, with investment choices of the vanguard target retirement funds. The expense ratio through the prospectus target year 2050 is 0.94. However on the vanguard site, it is 0.19 vanguard linkWhat is the reason for the difference?Also, the general consensus around here seems to be to open an IRA with the vanguard funds, so I was wondering, if my 401k already offers these, I would be better off diversifying in something else, right?  <response>: Just a guess here: your 401k administration fees may be paid by you rather than your employer. If I recall correctly, mutual fund companies and 401k administrators are not legally obligated to itemize fees and often keep them obfuscated on purpose. To me, thats criminal, to them its good business.You may be able to call Vanguard and request your 401k programs latest Returns and Fees document. Normally, this literature is not readily available on the website. 