$8/month = $56/year, divided by Vanguard's 0.0018 equals $31k.
So if the employee has in his 401k:
- $20k, the equivalent fee is 0.41%
- $50k, the equivalent fee is 0.24%
- $120k, the equivalent fee is 0.18%
- $200k, the equivalent fee is 0.16%
- $1M, the equivalent fee is 0.136%