Each year, many retirees wait to hear the announcement about the Social Security cost-of-living adjustment (COLA). When the percentage is released, it can feel reassuring — especially after a period of rising prices.
But sometimes, when the adjustment shows up in your deposit, it doesn’t quite feel like a raise.
Why is that?
Let’s take a closer look.
How COLA Is Calculated
The annual Social Security COLA is based on changes in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W). Specifically, it compares inflation data from the third quarter of one year to the third quarter of the previous year.
If the index rises, benefits are adjusted upward to reflect that change.
It’s important to understand what this means — and what it doesn’t.
COLA is designed to help benefits keep pace with broad inflation trends. It is not intended to increase lifestyle spending or meaningfully improve purchasing power over time. It’s an adjustment mechanism, not a bonus.
The Medicare Offset Effect
For many retirees, Medicare premiums are deducted directly from Social Security benefits.
If Medicare Part B premiums increase in the same year as a COLA adjustment, a portion of that increase may be absorbed before the net benefit reaches your bank account.
In some years, higher-income retirees may also experience IRMAA (Income-Related Monthly Adjustment Amount) surcharges, which can further reduce the net increase.
As a result, the percentage increase announced in the fall may not match the amount that ultimately shows up in monthly income.
Inflation in Real Life vs. Inflation in the Index
Another reason COLA may not “feel” sufficient is that inflation is personal.
The CPI-W reflects broad consumer spending patterns. However, retirees often spend differently than the working population. Healthcare, housing, and prescription costs may represent a larger portion of a retiree’s budget.
If those categories rise faster than the overall index, your personal cost of living may increase at a different rate than the COLA adjustment.
Over time, even small gaps between benefit adjustments and actual expenses can affect purchasing power.
The Subtle Erosion of Purchasing Power
Inflation does not need to spike dramatically to have an impact. Even moderate, steady price increases can compound over a long retirement.
A 2–3% inflation rate sustained over decades gradually reduces what each dollar can buy. While COLA adjustments aim to help offset this, they may not fully preserve lifestyle spending power in every scenario.
This is why retirement income planning typically considers multiple income sources — Social Security, portfolio withdrawals, pensions (if applicable), and other assets — rather than relying solely on annual adjustments.
The Behavioral Side: Anchoring Bias
There’s also a psychological factor at play.
When we hear that benefits are increasing by 3% or 4%, it’s natural to anchor to that number. It feels like a raise because we compare it to prior income.
But unlike a raise during working years — which often reflects career advancement or increased productivity — a COLA is simply an inflation adjustment. It is meant to help maintain purchasing power, not increase it.
When expectations and reality diverge, frustration can follow — even if the adjustment is functioning as designed.
Recognizing this bias can help frame the increase more accurately.
Planning Beyond the Adjustment
Rather than viewing COLA as a solution to rising costs, it may be more helpful to view it as one component of a broader income strategy.
Questions worth revisiting periodically include:
How sensitive is my spending plan to inflation?
Are withdrawals structured in a tax-efficient way?
How might healthcare costs evolve over time?
Does my income strategy allow for flexibility if expenses shift?
Retirement planning works best when it adapts to changing conditions — including inflation trends and policy adjustments.
The Bottom Line
A cost-of-living adjustment serves an important role in the retirement system. At the same time, it may not always feel like meaningful growth in income.
Understanding how it’s calculated, how Medicare premiums can affect net benefits, and how inflation influences purchasing power can bring clarity to what otherwise feels confusing.
Retirement is not static — and neither is the economic environment surrounding it. Reviewing your income strategy regularly can help ensure it remains aligned with your goals and spending needs.
If you have questions about how recent adjustments affect your retirement income picture, that’s a conversation worth having.
Retirement in Motion: Navigating Change with Confidence
Retirement planning is often described as reaching a destination. In reality, retirement is an evolving chapter shaped by changes in tax policy, healthcare costs, legislation, and personal priorities. This series explores some of the questions retirees face today and offers perspective on how thoughtful planning can help bring clarity to an ever-changing financial landscape.