Published
Sep 29, 2026
Last Updated
Sep 29, 2026
2027 FERS COLA Estimate: What the Latest Inflation Data Could Mean for Retirees
Current estimates point to a 2027 cost-of-living adjustment (COLA) of about 2.5% for retirees under FERS, the Federal Employees Retirement System. A 2027 FERS COLA estimate is a projection of the January 2027 annuity increase for FERS retirees, based on inflation and reduced by a formula when inflation exceeds 2%.
The Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) drives the COLA. According to the U.S. Bureau of Labor Statistics (BLS), it rose 3.5% over the 12 months ending in August 2026.
If the July through September average also rises 3.5%, your FERS COLA would be 2.5%. The figure isn't final until September's data arrives.
This guide explains the latest inflation figures and the formula that turns them into your COLA. It also shows what the increase could look like in dollars and what could still change it.
What Is the 2027 FERS COLA Estimate?
The 2027 FERS COLA estimate projects the cost-of-living adjustment that FERS annuitants will receive for 2027. It starts with the CPI-W, which the BLS publishes monthly. The COLA compares the average CPI-W for July, August, and September 2026 with the same three-month average from 2025.
OPM, the U.S. Office of Personnel Management, then applies a reduction formula to set your FERS percentage. CSRS, the Civil Service Retirement System, annuitants generally receive the full inflation percentage. FERS retirees receive less when inflation exceeds 2%.
According to OPM, the COLA is effective December 1 and appears in your January payment. Nothing is official yet, so every published figure is a third-party estimate until September's data is released.
What the Latest Inflation Data Shows
August 2026 inflation ran hotter than economists expected. According to the BLS, the CPI-W index level was 328.481 in August, up 3.5% from a year earlier, while the broader Consumer Price Index for All Urban Consumers (CPI-U) rose 3.4%. If the final COLA matched that reading, it would exceed the 2026 COLA of 2.8%. Federal employees approaching retirement can consult a certified financial planner for federal employees to understand how inflation and COLA changes may affect their retirement income.
Energy prices were a significant contributor. According to the BLS, the gasoline index rose 3.9% in August on a seasonally adjusted basis, accounting for over a third of the monthly all-items increase. Gasoline stands 27.4% above its level a year earlier, and the overall energy index is up 16.3%.
Core inflation, which excludes food and energy, was a more modest 2.4%.
Three forecasts you'll see cited are third-party estimates, not official figures:
- AARP: projects 3.6%, up from 3.5% a month earlier.
- The Senior Citizens League (TSCL): estimates 3.5%, down from 3.6% in July and 3.8% in June.
- Independent analyst Mary Johnson: estimates 3.5%, up from 3.4% in August.
Two of the three months that set the COLA are already published, which is why forecasts converge this late in the cycle.
How the FERS COLA Formula Works
Your FERS COLA equals the full CPI-W increase only when inflation is 2% or lower. Above that, OPM applies a three-tier rule described in its retirement COLA guidance:
The CPI-W increase in this table means the final third-quarter average increase, not any single month's reading. If that increase is 3.5%, the FERS COLA is 2.5%.
The 2026 cycle shows the rule at work. The 2026 COLA of 2.8% fell in the 2.1% to 3.0% tier, so FERS retirees received 2.0%.
If the final CPI-W increase is 3.5%, the 2027 estimate would fall in the top tier. There, the reduction is a flat one point instead of a cap.
Why August alone doesn't set the COLA
The August CPI-W index of 328.481 was up 3.5% from August 2025. The COLA uses the average CPI-W for July, August, and September, so September can still change the result.
According to MOAA, the Military Officers Association of America, the average CPI-W for the third quarter of 2025 was 317.265, and that figure is the 2027 baseline. A 3.5% increase over that baseline would imply a three-month average near 328.4. The actual 2027 COLA can't be calculated until September's CPI-W is available.
The calculation averages the CPI-W for July through September of each year, divides the difference by the prior-year average, and rounds to the nearest tenth of a percent.
2027 COLA Scenarios
Once the CPI-W increase is above 3%, each additional tenth of a percentage point generally raises the FERS COLA by a tenth of a point. Use the table to see where your FERS COLA lands under each outcome.
Current third-party forecasts sit at 3.5% to 3.6%. The 3.4% row is a hypothetical lower-end scenario, and the 3.8% row reflects TSCL's June estimate. Social Security's COLA follows its own statutory formula, so the table shows it at the projected CPI-W increase for comparison only.
Illustrative scenarios only. The Social Security Administration (SSA) will announce the official rate.
What a 2.5% FERS COLA Looks Like in Dollars
A 2.5% COLA adds $75 a month to a $3,000 FERS annuity, or $900 a year. A $3,000 CSRS annuity would grow by $105 a month at 3.5%.
Hypothetical illustrations, not client results.
Who Receives the FERS COLA?
You generally must be age 62 or older to receive a FERS COLA. OPM makes exceptions for:
- Disability annuitants
- Survivor annuitants
- Special-provision retirees, including law enforcement officers, firefighters, and air traffic controllers
If you're under 62 and don't fit those categories, you receive no COLA until you reach that age. CSRS annuitants generally receive COLAs at the full inflation rate, without the age threshold or reduction formula that applies to FERS. The two systems follow different rules, so confirm which one covers your annuity. You can use the FERS Supplement Calculator to estimate your potential FERS annuity supplement.
Many FERS retirees who leave before 62 also qualify for the FERS supplement, a temporary payment with its own eligibility rules and calculation. OPM does not adjust the supplement by COLA. Depending on your eligibility category, you may receive no COLAs on your annuity until you reach 62.
Why the Estimate Could Still Change
The estimate stays provisional until September inflation data is published. According to the BLS, the September CPI news release is scheduled for Wednesday, October 14, 2026. CBS News reports that the SSA is expected to announce the 2027 COLA the same day.
Several factors could affect the September reading, including energy prices.
Energy prices. CBS News reports that diesel topped $6 a gallon in September, a record, and that the August report doesn't capture that month's energy surge. Persistent energy costs could push September's reading higher.
Monetary policy: FedSmith notes that a September interest-rate increase is unlikely to materially affect the September CPI-W. Tighter policy could show up in the 2028 COLA instead. Federal employees can use the TSP Calculator to estimate their retirement savings and evaluate their long-term financial planning.
One month can only move the average so far. AARP's Mary Johnson said that, barring a dramatic change in September prices, she is confident the COLA will land in the mid-3% range.
The CPI-W also tracks spending by working-age wage earners rather than retirees. TSCL's Shannon Benton has noted that retirees tend to spend more heavily on housing and health care, so the index may understate your actual cost increases. For more retirement planning insights, you can also explore our retirement planning webinars.
How Federal Retirees Can Prepare
Federal Pension Advisors, a retirement planning firm specializing in federal employee benefits, encourages retirees to review four areas as the announcement approaches. This is educational information, not individualized advice.
- Budget on the FERS number. Headlines focus on the Social Security COLA, but at current levels, your FERS annuity rises one point less.
- Watch FEHB premiums. FEHB, the Federal Employees Health Benefits Program, premiums for 2027 can offset part of your COLA.
- Review TSP withdrawals. The TSP, or Thrift Savings Plan, the federal government's tax-advantaged retirement savings program, can fill gaps when inflation outpaces your COLA.
- Confirm COLA timing. If you're retiring before 62, map out when your first FERS COLA applies.
Verify figures against OPM.gov, TSP.gov, and SSA.gov before making decisions.
What the 2027 FERS COLA Estimate Means for Your Annuity
Current estimates point to a 2027 FERS COLA of about 2.5%, if the July through September CPI-W increase lands at 3.5%, as August's reading suggests. CSRS annuitants would receive the full CPI-W-based increase, while Social Security's COLA is calculated under its separate statutory formula. Federal employees and retirees can explore retirement planning resources to better understand their benefits and retirement options.
The BLS releases September's data on October 14, 2026. September inflation data, including energy prices, is the key remaining factor.
If you want to see how a lower FERS COLA, FEHB premiums, and TSP withdrawals fit together, schedule a benefits review with Federal Pension Advisors, a retirement planning firm specializing in federal employee benefits.
This article is educational and does not constitute individualized financial, legal, or tax advice.
Frequently Asked Questions About the 2027 FERS COLA
1. What is the estimated FERS COLA for 2027?
The official 2027 FERS COLA has not yet been announced. Based on the current 3.5% CPI-W reading, the FERS COLA could be about 2.5% if the July–September CPI-W average also reaches 3.5%.
2. How is the 2027 FERS COLA calculated?
The FERS COLA is based on the average CPI-W for July, August, and September compared with the same period from the previous year. If the increase is above 3%, the FERS COLA is generally the CPI-W increase minus 1 percentage point.
3. Do FERS retirees receive the full COLA?
Not when inflation exceeds 2%. Under the FERS COLA formula, a CPI-W increase above 3% results in a COLA that is 1 percentage point lower than the CPI-W increase.
4. When will the official 2027 FERS COLA be announced?
The September 2026 CPI data is scheduled for release on October 14, 2026. The final FERS COLA can be determined after the September CPI-W data is available.
5. When does the 2027 FERS COLA take effect?
The COLA is effective December 1, 2026, and the increase appears in the January 2027 payment.
6. Who is eligible for a FERS COLA?
FERS retirees generally become eligible for a COLA at age 62. Exceptions include disability annuitants, survivor annuitants, and certain special-provision retirees, such as law enforcement officers, firefighters, and air traffic controllers.
Disclaimer
This article is for educational and informational purposes only and does not constitute individualized financial, legal, or tax advice. FERS COLA estimates are subject to change until official inflation data is released. Verify current figures with OPM.gov, TSP.gov, and SSA.gov before making retirement decisions
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Stuart Hunsicker
Stuart Hunsicker is a retirement planning professional with over two decades of experience in the financial industry. His work focuses on helping federal employees, educators, and families better understand their retirement options and build strategies designed around long-term financial stability.
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