That 0.05% is for accounts worth more than $10,000. It's 0.17% otherwise (so still low). Vanguard also charges accounts with less than $10,000 in a fund a $20 service fee (clear information about the availability of the lower cost 'Admiral' shares does not seem to be readily available, but it seems for index funds it may be the case that you have to maintain an account at Vanguard).