On October 21, 2015 the IRS announced the 2016 limits that affect qualified retirement plans. As you can see, they are unchanged from 2015.
[i] Catch-up contributions are available to employees who are greater than or equal to 50 years old in 2016
[ii] Catch-up contributions are available to employees who are greater than or equal to 50 years old in 2016
[iii] Catch-up contributions are available to employees who are greater than or equal to 50 years old in 2016