What are the Main Differences Between FERS and CSRS Retirement Plans?

By Jeff Gill

Alright, let’s talk about FERS and CSRS—two retirement plans that sound like government acronyms (because, well, they are) but actually decide how you’re going to live your best retired life. If you’ve ever wondered what makes these plans different, you’re not alone. And honestly? It’s not as complicated as it seems. Let’s break it down like we’re having coffee, and I’m walking you through it.



CSRS: The Old-School Classic


Let’s start with CSRS (Civil Service Retirement System). Think of it as the OG of federal retirement plans. This plan has been around since 1920. Yep, over 100 years. Back then, they didn’t mess around—CSRS was a defined benefit plan, which means you get a guaranteed monthly check after retirement based on how long you worked and how much you made.

Here’s the catch: CSRS doesn’t include Social Security. Yep, no Social Security for you if you’re on this plan (don’t panic yet, I’ll explain). Your retirement income under CSRS comes from two main sources:


  1. Your pension (the big one).
  2. Whatever you’ve personally saved on the side (hello, thriftiness).

The pension itself is pretty sweet, though. It’s calculated using a formula that takes your years of service and your High-3 salary (the average of your three highest-paying years). For people who stayed in federal service for decades, this was a golden ticket to a cushy retirement.

But here’s the thing: CSRS was closed to new employees in 1984. So, unless you’ve been in the game for a long time, you’re probably in…



FERS: The New Kid on the Block


FERS (Federal Employees Retirement System) is the younger, trendier sibling of CSRS. It was introduced in 1987, and it’s what almost every federal employee is on now. Unlike CSRS, FERS is all about three income sources:


  1. Your Pension: It’s smaller than what CSRS offered but still a reliable paycheck.
  2. Social Security: Yep, FERS includes Social Security. You pay into it, and you’ll get it when you retire.
  3. Thrift Savings Plan (TSP): This is your retirement savings account, and it’s a game-changer because you can contribute, and the government matches some of it (free money!).


FERS gives you more flexibility than CSRS, but it also means you’re responsible for making your TSP work. Think of it as moving from a “we’ll take care of you” system to a “we’ll help, but you’ve got to chip in too” system.



Key Differences (The Fun Part)


1. Pension Size:

  • CSRS pensions are larger because they don’t have Social Security.
  • FERS pensions are smaller because they’re designed to work alongside Social Security and TSP savings.

2. Social Security:

  • CSRS folks don’t get it because they didn’t pay into it.
  • FERS folks do, which adds a nice layer of security.

3. Thrift Savings Plan (TSP):

  • CSRS folks could save in the TSP if they wanted, but it wasn’t a big focus.
  • For FERS, the TSP is a cornerstone of retirement, and those matching contributions can really add up.

4. Time in Service:

  • CSRS was great for career federal employees who stuck around for decades.
  • FERS is more flexible and works better for people who switch jobs or retire earlier.


So, Which One is Better?


It’s not really about which one is “better.” It’s about timing. If you’re on CSRS, congrats—you’ve got a solid pension coming your way. If you’re on FERS, you’ve got more moving parts to juggle, but you also have the advantage of flexibility and Social Security.



A Quick Wrap-Up


To put it simply:

  • CSRS is the classic plan with a big pension but no Social Security.
  • FERS is the modern plan with a smaller pension, Social Security, and a focus on the TSP.


Both plans are solid—it just depends on where you are in your career and what your retirement goals look like. The important thing? Start planning now, whether you’re in the CSRS or FERS world. The sooner you get a handle on your benefits, the better off you’ll be when it’s time to trade your office desk for a beach chair.


Got more questions about this? Let’s chat—I’ve got more coffee. 

Jeff Gill