403(b) is a retirement savings plan similar to a 401(k) that is offered to public organization organizers, some non-profit employers, cooperative hospital service organizations and self-employed ministers. 

Learn more about 403(b)s here. For government payroll, exceptions apply. Read more here.

Note: 403(b)s are not managed by Gusto.  You can add the benefit to your Gusto account for payroll purposes and any deductions will be left in your company bank account to be moved externally.  Gusto does not support the special catch-up limits.  Learn more about the special catch-up limits from the IRS.