- 100% of the participant's includible compensation, or
- the elective deferral limit ($18,500 in 2018 and $18,000 in 2015 - 2017).
Increases to the general annual contribution limit:
457(b) plans of state and local governments may allow catch-up contributions for participants who are aged 50 or older.
Special 457(b) catch-up contributions, if permitted by the plan, allow a participant for 3 years prior to the normal retirement age (as specified in the plan) to contribute the lesser of:
Twice the annual limit ($37,000 in 2018 and 36,000 in 2015 - 2017), or
The basic annual limit plus the amount of the basic limit not used in prior years (only allowed if not using age 50 or over catch-up contributions)
Publication 4484, Choose a retirement plan for employees of tax exempt and government entities (schools, hospitals, churches, charities)