Early estimates put Social Security's 2027 cost-of-living adjustment between 3.6% and 3.8%, a projection that would make it the program's largest benefit increase since 2023. For beneficiaries, that is a meaningful improvement over recent years. The complication is that the final number cannot be confirmed until inflation readings are released this summer.
What the estimates indicate
A projected 2027 COLA of 3.6% to 3.8% carries a specific benchmark: it would surpass anything Social Security has delivered since 2023. That framing suggests the adjustments for the years between were smaller. If current projections hold, beneficiaries will receive their largest annual increase in four years.
The estimates rest on inflation data that is already available. They are a directional signal, not an official figure, and the distinction matters. A signal pointing higher is worth noting. It is not the same as a confirmed rate.
Why the final number is still open
The 2027 COLA will be set based on inflation readings released this summer. Those readings are the decisive input. Current estimates reflect data trends in hand today; what happens to inflation between now and when the summer data lands will determine whether the final adjustment comes in at the projected level or moves away from it.
The source is explicit: the final adjustment will depend on those readings. There is no confirmed number until the data clears.
The counterargument
The counterargument to the current projection is a downside inflation surprise. If summer price data shows inflation cooling more sharply than current projections assume, the adjustment could come in below 3.6%. A COLA that falls short of estimates already in public circulation would disappoint beneficiaries planning around the projected increase. That outcome is not the base case, but the data dependency makes it a real possibility that should not be dismissed.
On balance
On balance, a COLA in the 3.6% to 3.8% range would be the largest since 2023, and the current directional read is constructive. The line to watch is the summer inflation data. Once those readings land, the final figure is set.