CSRS Offset and Social Security: How Will Your Annuity Be Calculated?

Federal employees covered under CSRS Offset have special considerations when it comes to collecting Social Security in retirement. The author describes how this works and provides some real life examples based on a hypothetical scenario.

The rules that govern federal retirement are complex and confusing. I often receive arcane questions about parts of the rules that apply to only a few employees.

Over the last few years, I have been getting more and more questions about CSRS Offset and its relationship to certain Social Security rules, such as the Windfall Elimination Provision (WEP) and Government Pension Offset (GPO). This uptick in questions is likely because those who fall under CSRS Offset are at the cusp of retirement.

This article is written for those who fall under the CSRS Offset system. Others may find it interesting, if not applicable to their specific situation.

A person is covered under CSRS Offset if they:

  • Had five or more years of creditable civilian service as of 12/31/1986 (the day before FERS).
  • Had a break in service of over 365 days.
  • Were rehired following a break in service at any time after 12/31/1983 (the day before all newly hired federal employees must have been covered by Social Security).

Individuals under CSRS who fit the above definition should have been given a choice of electing FERS or choosing CSRS Offset upon their return to federal service. CSRS Offset employees, like FERS employees, must have Social Security taken out of their federal salary. When a CSRS Offset person retires, they get a regular CSRS pension until they reach the age of 62. At age 62, their CSRS pension is reduced (offset) by the value of the Social Security that they earned while covered under CSRS Offset. If they retire at age 62 or over, the offset takes place immediately upon their retirement.

The offset will take place even if they choose not to apply for their Social Security.

The reduction is determined in all but a few situations by dividing the number of years of CSRS Offset service by 40 and applying the resulting fraction to one’s age 62 Social Security benefit.

Karen is a CSRS Offset retiree who, when she retired, had 20 years of CSRS Offset service. She is receiving a CSRS pension of $60,000 per year. Her Social Security benefit at age 62 will be $12,000 per year. Here is how the offset to her pension will be calculated:

  • The 20 years of CSRS Offset service is divided by 40, giving a fraction of ½ (50%).
  • The reduction to Karen’s CSRS pension is 50% of her Social Security benefit, or $6,000 per year. This reduces her pension to $54,000 per year.
  • Assuming Karen applies for her Social Security at age 62, she will receive the entire $12,000 per year Social Security benefit.
  • Karen’s benefit will consist of her reduced CSRS pension ($54,000 per year) and her Social Security ($12,000 per year) for a total of $66,000 per year.
  • Karen, like most CSRS Offset retirees will receive more money at age 62 if she applies for her Social Security

In the example above, Karen had 20 years of CSRS Offset service where Social Security was being taken out of her federal salary. This fact may result in her Social Security being subject to a reduction from the Windfall Elimination Provision.

The Social Security System has a need-related twist in the computation formula that is designed to replace a much greater portion of a low wage earner’s income than that of the high wage earner.

CSRS employees, and others who have earned a retirement benefit based on work that was not covered by Social Security, are likely to have many years in their Social Security earnings record where they had little or no employment covered by Social Security. They would look like a low wage earner to the Social Security system, even though they had been working at a good job and earning a pension the entire time.

Karen, in our previous example, had at least ten years of CSRS coverage where she was not having Social Security taken from her federal salary. Unless she has at least 30 years of “substantial earnings” in Social Security covered employment, her Social Security benefit will be reduced by the WEP.

Social Security benefits are based on your lifetime earnings. The following is how they are computed in 2016.

  • Your lifetime earnings are indexed for inflation.
  • The highest 35 inflation indexed years are added together.
  • The total is divided by 420 (the number of months in 35 years) to arrive at average indexed monthly earnings (AIME)
  • AIME is multiplied by:
    • 90% x the first $856
    • 32% x $857 to $5157
    • 15% of the amount over $5157

If you are affected by the WEP, the multiplication factor for the first “bend point” above will be less than 90%. How much it is reduced depends on how many years of substantial earnings you have under Social Security. If you have 20 or fewer years of substantial earnings (like Karen) your benefit will be computed using a 40% factor. For years over 20, the factor increases by 5% a year until it reaches the full 90% after 30 years. This Social Security Factsheet on the WEP has a chart on what constitutes substantial earnings.

At the time this article was written, Social Security had not updated the publication for 2016. Due to the fact that there was no COLA on Social Security benefits for 2016, there was no increase in the amount that is considered substantial earnings.

Your Social Security Statement does not take the WEP into account. There is a WEP calculator on the Social Security website that can be used to determine how (or if) the WEP affects your Social Security.

Back to Karen. We’ll assume that the 20 years of CSRS Offset service she has are her only years of substantial earnings under Social Security and that she is fully affected by the WEP. The $12,000 per year estimated age 62 benefit from her Social Security Statement will not be what she is entitled to receive because of the effect of the WEP. The maximum reduction that the WEP can cause is $5,136 per year. As Karen will, unfortunately, be subject to the maximum reduction, her annual Social Security benefit will be reduced to $6,864 per year. In calculating her Offset (under the CSRS Offset retirement system) the WEP is applied first and then the Offset is applied. Here’s a re-calculation of her benefits using a Social Security benefit that is reduced by the application of the WEP.

  • The 20 years of CSRS Offset service is divided by 40, giving a fraction of ½ (50%).
  • The reduction to Karen’s CSRS pension is 50% of her Social Security benefit, or $3,432 per year. This reduces her pension to $56,568 per year.
  • Assuming Karen applies for her Social Security at age 62, she will receive the entire $6,864 per year Social Security benefit.
  • Karen’s benefit will consist of her reduced CSRS pension ($56,568 per year) and her Social Security ($6,864 per year) for a total of $63,432 per year.
  • She still comes out ahead.

It is unlikely that the Government Pension Offset will affect Karen (or most CSRS Offset employees for that matter). The GPO reduces (usually eliminates) any Social Security benefits to which you would be entitled based on the earnings of another (i. e., spousal or survivor benefits). CSRS Offset retirees are exempt from the GPO once they have spent five years covered by CSRS Offset.

As the topics in this article are complicated and confusing, I double checked my answer with my colleague Ehren Clovis. Ehren is a retired retirement specialist and a retirement instructor for Federal Career Experts. She provides advice on federal retirement for a fee through her company Federal Benefits on Call. She can be reached at eclovis.fboc@gmail.com.

Agencies can request to have John Grobe, or another of Federal Career Experts' qualified instructors, deliver a retirement or transition seminar to their employees. FCE instructors are not financial advisers and will not sell or recommend financial products to class participants. Agency Benefits Officers can contact John Grobe at johnfgrobe@comcast.net to discuss schedules and costs.

About the Author

John Grobe is President of Federal Career Experts, a firm that provides pre-retirement training and seminars to a wide variety of federal agencies. FCE’s instructors are all retired federal retirement specialists who educate class participants on the ins and outs of federal retirement and benefits; there is never an attempt to influence participants to invest a certain way, or to purchase any financial products. John and FCE specialize in retirement for special category employees, such as law enforcement officers.