FERS & CSRS COLA History (1999–2026)
Every federal retiree cost-of-living adjustment for the past 28 years — CSRS and FERS side by side, with the gap calculated.
2027 COLA Watch: Running at ~3.0% (May 2026 CPI-W data)
Through April 2026, the CPI-W is tracking approximately 3.0% above the third-quarter 2025 baseline. If that holds through September 2026, CSRS and Social Security retirees would receive a 3.0% COLA in January 2027 — and FERS retirees would receive 2.0% (CPI-W minus 1%). The official announcement comes in October 2026. Track the live 2027 COLA estimate →
How Federal Retiree COLAs Work
Federal retirees under both CSRS and FERS receive annual cost-of-living adjustments tied to the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). The COLA is measured as the percentage change in the CPI-W from the average of July–September of the prior base year to the average of July–September of the current year. The adjustment is effective December 1 and first appears in the January annuity payment.
The key difference between systems is the FERS reduction rule, written into law when FERS was created in 1986:
- CPI-W 0%–2%: FERS COLA equals the full CPI-W increase (same as CSRS).
- CPI-W 2%–3%: FERS COLA is capped at 2.0%, regardless of the actual CPI-W.
- CPI-W above 3%: FERS COLA equals CPI-W minus 1.0 percentage point (the “diet COLA”).
- Negative CPI-W: No COLA is paid under either system; there are no negative adjustments.
One additional FERS rule that catches many retirees off guard: most FERS annuitants receive no COLA until they reach age 62. Disabled FERS retirees and FERS survivor annuitants are exempt from this age restriction and receive COLAs immediately upon retirement.
FedTools Analysis: How the Gap Has Compounded (1999–2026)
Compounding a $1,000/month pension through every COLA from January 1999 through January 2026 (28 adjustments):
$2033
CSRS value/month
$1798
FERS value/month
$235
Monthly gap
$2816
Annual gap
FedTools calculation based on a hypothetical $1,000/month pension at the start of 1999. Actual dollar gap scales proportionally with your starting pension amount. Sources: OPM BAL annual COLA notices, SSA CPI-W series.
FERS & CSRS COLA History: 1999–2026
All figures are the COLA applied effective December 1, first paid January 1 of the listed year. FERS rates apply to annuitants age 62 or older at time of adjustment.
| Year | CPI-W Change | CSRS COLA | FERS COLA (age 62+) | Gap |
|---|---|---|---|---|
| 1999 | 2.4% | 2.4% | 2.0% | 0.4pp |
| 2000 | 2.5% | 2.5% | 2.0% | 0.5pp |
| 2001 | 3.5% | 3.5% | 2.5% | 1.0pp |
| 2002 | 2.6% | 2.6% | 2.0% | 0.6pp |
| 2003 | 1.4% | 1.4% | 1.4% | Equal |
| 2004 | 2.1% | 2.1% | 2.0% | 0.1pp |
| 2005 | 2.7% | 2.7% | 2.0% | 0.7pp |
| 2006 | 4.1% | 4.1% | 3.1% | 1.0pp |
| 2007 | 3.3% | 3.3% | 2.3% | 1.0pp |
| 2008 | 2.3% | 2.3% | 2.0% | 0.3pp |
| 2009 | 5.8% | 5.8% | 4.8% | 1.0pp |
| 2010 | ≤ 0% | 0% | 0% | Equal |
| 2011 | ≤ 0% | 0% | 0% | Equal |
| 2012 | 3.6% | 3.6% | 2.6% | 1.0pp |
| 2013 | 1.7% | 1.7% | 1.7% | Equal |
| 2014 | 1.5% | 1.5% | 1.5% | Equal |
| 2015 | 1.7% | 1.7% | 1.7% | Equal |
| 2016 | ≤ 0% | 0% | 0% | Equal |
| 2017 | 0.3% | 0.3% | 0.3% | Equal |
| 2018 | 2.0% | 2.0% | 2.0% | Equal |
| 2019 | 2.8% | 2.8% | 2.0% | 0.8pp |
| 2020 | 1.6% | 1.6% | 1.6% | Equal |
| 2021 | 1.3% | 1.3% | 1.3% | Equal |
| 2022 | 5.9% | 5.9% | 4.9% | 1.0pp |
| 2023 | 8.7% | 8.7% | 7.7% | 1.0pp |
| 2024 | 3.2% | 3.2% | 2.2% | 1.0pp |
| 2025 | 2.5% | 2.5% | 2.0% | 0.5pp |
| 2026 | 2.8% | 2.8% | 2.0% | 0.8pp |
| Cumulative | 28 years | +103.3% | +79.8% | 23.5pp |
1999FERS −0.4pp
CPI-W
2.4%
CSRS
2.4%
FERS
2.0%
2000FERS −0.5pp
CPI-W
2.5%
CSRS
2.5%
FERS
2.0%
2001FERS −1.0pp
CPI-W
3.5%
CSRS
3.5%
FERS
2.5%
2002FERS −0.6pp
CPI-W
2.6%
CSRS
2.6%
FERS
2.0%
2003Equal
CPI-W
1.4%
CSRS
1.4%
FERS
1.4%
2004FERS −0.1pp
CPI-W
2.1%
CSRS
2.1%
FERS
2.0%
2005FERS −0.7pp
CPI-W
2.7%
CSRS
2.7%
FERS
2.0%
2006FERS −1.0pp
CPI-W
4.1%
CSRS
4.1%
FERS
3.1%
2007FERS −1.0pp
CPI-W
3.3%
CSRS
3.3%
FERS
2.3%
2008FERS −0.3pp
CPI-W
2.3%
CSRS
2.3%
FERS
2.0%
2009FERS −1.0pp
CPI-W
5.8%
CSRS
5.8%
FERS
4.8%
2010Equal
CPI-W
≤ 0%
CSRS
0%
FERS
0%
2011Equal
CPI-W
≤ 0%
CSRS
0%
FERS
0%
2012FERS −1.0pp
CPI-W
3.6%
CSRS
3.6%
FERS
2.6%
2013Equal
CPI-W
1.7%
CSRS
1.7%
FERS
1.7%
2014Equal
CPI-W
1.5%
CSRS
1.5%
FERS
1.5%
2015Equal
CPI-W
1.7%
CSRS
1.7%
FERS
1.7%
2016Equal
CPI-W
≤ 0%
CSRS
0%
FERS
0%
2017Equal
CPI-W
0.3%
CSRS
0.3%
FERS
0.3%
2018Equal
CPI-W
2.0%
CSRS
2.0%
FERS
2.0%
2019FERS −0.8pp
CPI-W
2.8%
CSRS
2.8%
FERS
2.0%
2020Equal
CPI-W
1.6%
CSRS
1.6%
FERS
1.6%
2021Equal
CPI-W
1.3%
CSRS
1.3%
FERS
1.3%
2022FERS −1.0pp
CPI-W
5.9%
CSRS
5.9%
FERS
4.9%
2023FERS −1.0pp
CPI-W
8.7%
CSRS
8.7%
FERS
7.7%
2024FERS −1.0pp
CPI-W
3.2%
CSRS
3.2%
FERS
2.2%
2025FERS −0.5pp
CPI-W
2.5%
CSRS
2.5%
FERS
2.0%
2026FERS −0.8pp
CPI-W
2.8%
CSRS
2.8%
FERS
2.0%
Table legend
Shaded rows = high-inflation years where CSRS/FERS gap was largest (COLA ≥ 5%)
Gray rows = zero-COLA years (2010, 2011, 2016)
pp = percentage points (difference in COLA rates between CSRS and FERS)
Cumulative = compound total of all 28 annual adjustments, not a simple sum
See How COLA Affects Your Pension
Run your FERS retirement numbers with our free calculator — includes High-3, service years, and survivor benefit options.
Frequently Asked Questions
Why do FERS retirees get a smaller COLA than CSRS retirees?
Congress deliberately reduced the FERS COLA as part of FERS design when it was created in 1986. The rationale was that FERS retirees also receive Social Security (which gives a full CPI-W COLA) and TSP savings, so their pension COLA could be trimmed. The FERS rule: if CPI-W rises between 2% and 3%, FERS COLA is capped at 2.0%; if CPI-W exceeds 3%, FERS COLA = CPI-W minus 1 percentage point.
When does a FERS retiree start receiving COLA?
Most FERS retirees must reach age 62 before they receive any cost-of-living adjustments on their pension. There are two exceptions: disabled FERS retirees receive COLAs regardless of age, and FERS survivor annuitants (spouses and children) receive COLAs regardless of age. CSRS retirees receive COLAs at any age.
When is the COLA announced and when does it take effect?
The Social Security Administration announces the COLA each October, typically in the third week. The adjustment is effective December 1 of the same year, and the higher payment first appears in the January annuity check (paid on the first business day of January).
How is the COLA percentage calculated?
The COLA equals the percentage change in the average CPI-W (Consumer Price Index for Urban Wage Earners and Clerical Workers) during the third quarter (July–September) of the current year compared to the third quarter of the last year in which a COLA was paid. If the CPI-W average was lower than the prior base year, the COLA is zero — it can never be negative.
Why were there zero COLAs in 2010, 2011, and 2016?
Following the 2008 financial crisis, energy prices fell sharply. The CPI-W in the third quarter of 2009 and 2010 was below the 2008 base used for COLA calculations, so no adjustment was made. Similarly, the CPI-W in the third quarter of 2015 was below the 2014 base (when the last positive COLA was set), so the 2016 COLA was also zero.
How much has the FERS COLA gap compounded since 1999?
From 1999 through 2026, the cumulative CSRS COLA totals approximately 79.5%. The cumulative FERS COLA totals approximately 65.8%. That means a $1,000/month CSRS pension from 1999 would have grown to roughly $1,795/month, while an equivalent FERS pension would have grown to only about $1,658/month — a $137/month gap, or roughly $1,640/year, from a single $1,000 starting point.
What is the 2027 COLA forecast?
As of May 2026, the CPI-W is running about 3.0% above the third-quarter 2025 base. If that pace holds through September, the 2027 CSRS COLA would be approximately 3.0% and the FERS COLA would be 2.0% (CPI-W minus 1%). The official announcement comes in October 2026.
Do CSRS Offset employees get the same COLA as regular CSRS?
CSRS Offset employees (those who paid Social Security taxes on top of CSRS contributions) receive the full CSRS COLA rate on their CSRS Offset annuity, the same as regular CSRS retirees. The "offset" only affects how their benefit is coordinated with Social Security at age 62 — it does not reduce the COLA rate.
Data sources
OPM Benefits Administration Letters (BAL XX-101 series), annual COLA notices 1999–2026. opm.gov
SSA CPI-W Cost-of-Living Adjustments series. ssa.gov
NARFE Civil Service COLA History Fact Sheet, January 2023. narfe.org
FERS COLA reduction rule: 5 U.S.C. § 8462; OPM CSRS/FERS Handbook Chapter 2. opm.gov