Employees who elect to transfer from CSRS coverage to FERS coverage after completing 5 or more years of creditable civilian service as of the effective date of transfer (excluding service covered by both CSRS and social security deductions) will have a CSRS annuity component in their FERS benefit. If you do not know if this applies to you, contact your human resource office.
For purposes of the Federal Ballpark E$timate, enter a number reflecting full years. It does not accept partial years.
If you are a CSRS-Offset employee, enter the number of years of "straight" CSRS coverage you worked (do not include the number of years as CSRS-Offset time which includes social security coverage). For example, say you worked 7 years under CSRS covered service, then you left service, and after a break of more than 365 days you returned to work for the Federal government. You are most likely a CSRS-Offset employee with 7 years of CSRS covered service. Enter 7 in the Years of CSRS Coverage block.