The average 401(k) balance in 2012 was nearly $76,000, up 11% over 2011, according to Judy Diamond Associates. While the national average was up, though, some states experienced much faster growth than others.
"Although balances were up across the board, the increases were not evenly distributed," Eric Ryles, managing director of Judy Diamond, said in a statement. "There are very real differences in the best and worst states. …"
Judy Diamond compared average balances in 2011 and 2012, the most recent data available, in about 470,000 active plans in each state and Washington, D.C. While growth overall was up, it was generally below the rate of return of 15.38% for the S&P 500, even among the 10 states with the most growth. Ryles was unconcerned, though, noting that older participants' more conservative portfolios lowered the overall average.
"Participants with the highest balances, usually those getting close to retirement, should be focused more on capital preservation rather than capital growth," he said. "This means that they are in bond funds and stable value funds, which will inevitably underperform a benchmark like the S&P, but do so safely. The overall rate of return of the plan is limited as a result."
10. Missouri
Growth Rate: 12.68%
2011 Average: $68,071
2012 Average: $76,704
9. Kansas
Growth Rate: 12.69%
2011 Average: $62,322
2012 Average: $70,233
8. Arizona
Growth Rate: 12.91%
2011 Average: $59,328
2012 Average: $66,987
7. Rhode Island
Growth Rate: 13.30%
2011 Average: $79,331
2012 Average: $89,886
6. Alask
Growth Rate: 13.45%
2011 Average: $68,528
