The Part of Retirement COLA Was Never Designed to Cover

A retiree receiving $2,000 per month from Social Security saw their check increase by $56 in January 2026 thanks to the 2.8% cost-of-living adjustment. On paper, that looks like protection against inflation. In reality, healthcare premiums alone (Medicare Part B and supplemental insurance combined) consumed over $40 of that raise, and grocery and utility bills climbed on top of that. By month’s end, that $56 felt more like $10.

This is the erosion COLA was designed to prevent but increasingly fails to address. The official inflation measure used to calculate Social Security increases tracks what working-age people buy, not what retirees actually spend money on. Healthcare costs dominate retiree budgets and are rising far faster than overall inflation.

The Healthcare Gap That COLA Misses

Healthcare costs are rising far faster than the inflation measure used to set COLA. Over the past year, healthcare spending grew 6.91% – roughly 1.5 times the pace of overall consumer spending. The gap between what retirees spend and what COLA covers is not a rounding error. It is structural.

For retirees on fixed incomes, healthcare expenses represent the single largest threat to long-term purchasing power, growing at a pace that consistently outstrips annual COLA adjustments.

What Actually Erodes Over Time

From 2024 Q1 to 2025 Q3, the household savings rate dropped from 6.2% to 4.2% – people are spending more of their income just to maintain the same standard of living. That pressure is uneven: housing costs grew 2.91% while healthcare jumped 6.91% over the past year. A retiree with a paid-off home might escape housing pressure, but nobody escapes healthcare inflation. Prescription drugs, doctor visits, and out-of-pocket expenses all climb faster than the COLA check grows.

Each year, the gap between actual costs and COLA widens slightly. Over a 20-year retirement, those small annual shortfalls add up to tens of thousands of dollars in lost purchasing power.

The Real Planning Question

COLA provides nominal protection, but retirees who assume Social Security will keep pace with their actual expenses are setting themselves up for disappointment. The question is not whether Social Security will increase each year. It will. The question is whether those increases will cover the costs that matter most, and the data suggests they will not.

Two strategies consistently show up in retirement planning research: delaying Social Security claims to lock in a higher base benefit, and maintaining a dedicated healthcare reserve separate from general savings. Neither is a perfect solution, but both address the structural gap COLA leaves behind. The data consistently shows that COLA adjustments have not kept pace with the healthcare costs that dominate retiree budgets.