I believe the IRS limits for total 401k contribution (yours plus company match) is somewhere around $45,000 (ballpark) or so. The max you can contribute below age 50 is $16,500 of your own money.

In your example of an FO making $120,000, if you put in $16,500 (the max) to the 401k, the company will match 9.3% of the $120,000 or $11,160.

So total, you would be putting in $27,660 in the 401k.

In addition, profit sharing was 5.7% last year (I think). So $120,000 * 5.7% = $6840 that is put into a separate retirement account (not your 401K).

So the total you could have put away toward retirement in your example was $34,500 for the year. Granted, profit sharing can vary.