What CSRS Is
The Civil Service Retirement System (CSRS) was the principal federal retirement system before FERS was introduced. It generally covers employees who were hired before January 1, 1984, and some who chose to remain under it.
CSRS is primarily a pension system. Its core benefit is an annuity paid for life, calculated from salary and years of service. It was not designed around Social Security or a matched savings plan in the way FERS was.
Historical Coverage
Many current retirees and some active employees remain under CSRS. Because coverage depends on hire date and past elections, the first step is confirming which system applies to your own record. Your official personnel documents and retirement estimates from OPM will show your coverage category.
Service Requirements
CSRS eligibility is also based on age and service. Commonly referenced milestones include:
- Age 55 with 30 years of service.
- Age 60 with 20 years of service.
- Age 62 with 5 years of service.
Other provisions, including those for certain law enforcement and firefighter positions, may apply and differ from these general milestones.
Annuity Concepts
A CSRS annuity is generally based on your high-3 average salary and your creditable service. The formula uses a higher percentage per year than FERS, which is one reason CSRS is often described as more generous for the same length of service. The commonly cited structure is 1.5 percent per year for the first 5 years, 1.75 percent per year for the next 5 years, and 2 percent per year for service beyond 10 years.
Comparison Points
CSRS and FERS differ in several areas, including contribution levels, Social Security participation, and how savings plans are used. For a detailed side-by-side comparison, read the CSRS and FERS Compared article.
Questions to Consider
- Does my personnel record confirm CSRS coverage?
- What is my projected high-3 average salary?
- Have I checked whether any of my service qualifies as creditable service?
- What survivor or beneficiary options apply to my annuity?
A Worked Example
Suppose an employee under CSRS retires with 30 years of creditable service and a high-3 average salary of $90,000. Using the structure above, the first 5 years earn 1.5 percent each (7.5 percent), the next 5 years earn 1.75 percent each (8.75 percent), and the remaining 20 years earn 2 percent each (40 percent). The total is 56.25 percent of the high-3 average salary, so the basic annuity is $90,000 × 56.25% = $50,625 per year, or about $4,219 per month.
This is before any survivor reduction, taxes, or insurance premiums. It is an illustration of the formula, not a benefit estimate.
Limits and Sick Leave Credit
CSRS has a cap: the basic annuity cannot exceed 80 percent of your high-3 average salary. In practice this generally affects only people who retire with more than 41 years of service. Unused sick leave is converted into additional service time and added when your annuity is computed. It generally does not count toward meeting the age and service requirements to retire, so it can increase the benefit without making you eligible sooner.
What CSRS Offset Means
Some employees have both CSRS-covered service and federal service that was covered by Social Security. These employees fall under a variation called CSRS Offset. In general, when an Offset employee reaches Social Security eligibility age, the CSRS annuity is reduced by a portion of the Social Security benefit earned through federal service. If you had a break in service or were hired near the changeover to FERS, ask your human resources office whether Offset applies to you.
Cost-of-Living Adjustments
CSRS annuities generally receive a cost-of-living adjustment that follows the increase in the consumer price index. FERS adjustments are generally calculated differently and, for most retirees, do not begin until age 62. This difference is one reason the two systems feel quite different in retirement.
Survivor Benefits Under CSRS
CSRS lets a retiree provide a continuing annuity for a surviving spouse or former spouse. The retiree’s own annuity is reduced to pay for this protection, and the reduction depends on the amount of the survivor benefit chosen. Married retirees are generally expected to provide at least a minimum survivor benefit unless the spouse consents in writing to a different arrangement. Because this decision affects your household for decades, ask OPM for the exact reduction applicable to your own annuity before you finalize the choice.
Planning Steps for a CSRS Employee
- Confirm your coverage category and any past service deposits with your human resources office.
- Request an estimate for several possible retirement dates, because small changes in service or high-3 can change the result.
- Check whether any unused sick leave and military service will count toward your annuity.
- Decide how your TSP balance, if you have one, fits alongside your annuity.
- Review health and life insurance enrollment so that you meet the five-year requirements.
Common Mistakes to Avoid
- Assuming your coverage without checking your personnel records, especially if you were hired in the mid-1980s or had a break in service.
- Overlooking the impact of survivor annuity choices on your own monthly payment.
- Forgetting that unused sick leave generally adds to the annuity amount but not to eligibility.
- Ignoring CSRS Offset when planning around Social Security.
- Using a calculator built for FERS to estimate a CSRS benefit.
Frequently Asked Questions
Who is covered by CSRS?
CSRS generally covers employees who were hired before 1984 and some who chose to stay in the system. Employees hired in the years just before FERS took effect may be covered by CSRS Offset or may have moved to FERS, so confirm your own category.
Does CSRS include Social Security?
Generally no for federal service covered by CSRS, although Social Security may still apply to non-federal work and to CSRS Offset cases. Check your own situation with the Social Security Administration and OPM.
Can a CSRS employee contribute to the TSP?
Yes. CSRS employees can contribute to the TSP, but they do not receive the automatic agency contribution or matching that FERS employees receive.
Is a CSRS annuity larger than a FERS annuity?
For the same salary and service, the CSRS basic annuity is generally larger, because it is the main source of retirement income. A FERS employee also has Social Security and TSP income, so total retirement income should be compared, not the basic annuity alone.