根据这篇文章的算法, 大多数人应该是不够:
http://www.financialsamurai.com/2012/01/09/how-much-should-one-have-in-their-401k-at-different-ages/
| Age | Years Worked | Low End | High End |
| 22 | 0 | $0 | $0 |
| 23 | 1 | $8,000 | $17,000 |
| 24 | 2 | $25,000 | $37,000 |
| 25 | 3 | $42,000 | $70,000 |
| 30 | 8 | $127,000 | $182,000 |
| 35 | 13 | $215,000 | $331,000 |
| 40 | 18 | $300,000 | $521,000 |
| 45 | 23 | $383,000 | $764,000 |
| 50 | 28 | $468,000 | $1,075,000 |
| 55 | 33 | $553,000 | $1,470,000 |
| 60 | 38 | $638,000 | $1,974,000 |
| 65 | 43 | $723,000 | $2,618,000 |