These are the IRS approved annual maximum amounts you can contribute to your 401(k).

 

IRS 401(k)/Pension Plan Limits 2017 Limit 2016 limit 2015 limit2014 limit
 401(k)/403(b) Employee Deferral Limit $18,000 $18,000 $18,000$17,500

 401(k)/403(b) Catch-up Contribution

*available in excess of the employee deferral limit, for people age 50 and older

 $6,000  $6,000 $6,000$5,500 

 Here are links to the IRS website with these figures: 2017 limits