You can elect either pre-tax or after-tax contributions to the 457(b) Plan and designate a dollar or percentage amount to be deducted from your paychecks. By choosing a percentage-based contribution, you will ensure automatic increases in your contribution amount with each increase in your pay due to any supplemental pay or future raises received.

Not ready to sign up yet? Get more info about how deferred comp works and your options.
There are IRS limits to the standard and catch-up deferrals you can make to your plan.
See the limits