Q: How do I begin the retirement application process? The following chart outlines the requirements for an immediate annuity under the Federal Employees.Retirement System (FERS). If you have not reached your 20 years covered Law Enforcement or Fire Fighter service and reach the age 57, you must retire in the month you reach your 20 years. The Chicago Benefits Office is responsible for the administration of medical, dental, and related benefit programs for all eligible City of Chicago employees. Must have a minimum of 10 years of pension credit; Minimum age to retire is 62. Contributions may be rolled over into another qualified retirement plan or paid to you. State law now requires every Illinois employer with five or more employees to offer their own retirement program or facilitate Secure Choice. A detailed and complete coverage of all the applicable statutes in the Pension Code would defeat the purpose of this Handbook.