when in doubt ask your company s benefits department whether or not you re a highly compensated employee double check on the amount you can contribute to your 401 k you also want to be prepared to pay additional taxes on what you may have contributed in the previous year 
for example if it turns out that you are an hce and you contributed the maximum there could be consequences if your company fails the nondiscrimination test it will probably refund you the excess contributions you made this will be considered taxable income 