Hewitt presents it's annual study of the saving and investing habits of more than 2.6 million employees eligible for 401(k) plans. Hewitt provides retirement and benefits for many large plans. 

Hewitt’s survey results highlight very real challenges for companies: In 2005, average 401(k) plan balances grew more than 10 percent to nearly $76,000, but median plan balances were much lower than the average at only $27,100. One-third (32.8 percent) of employees did not participate in their 401(k) plan, and contribution rates remained steady at approximately 8 percent. Of those employees who did participate, approximately one in five (22 percent) didn’t contribute enough to obtain the full company match, and just 30 percent contributed only enough to obtain the match. Younger, lower-tenured and lower-salaried workers were most likely to contribute in a nominal way.