Social Security cost-of-living adjustment watchers have a date to circle: the U.S. Bureau of Labor Statistics will publish September inflation data on Oct. 14, 2026, and that report will supply the final piece used to set the 2027 increase. The Senior Citizens League projects the adjustment at 3.6% for more than 71 million traditional beneficiaries.
The increase is meant to offset inflation and help recipients avoid losing buying power. In this case, the forecast is being pushed by higher consumer prices tied to Donald Trump’s tariffs and the Iran war, which gives the projected raise a second edge: it could help checks keep up, even as the price pressures behind it strain budgets.
Oct. 14 BLS release
The bureau’s September reading will be the last inflation input in the formula for the upcoming year’s COLA. Once that data is out, the calculation can move from projection to the figure that will guide 2027 benefit checks.
That timing matters for people who depend on Social Security month to month. The adjustment applies to a base that covers more than 71 million traditional beneficiaries, so even a small change in the percentage can alter household income across a large group.
Trump tariffs and prices
Trump unveiled Liberation Day tariffs on April 2, 2025, including sweeping global tariffs and higher reciprocal tariffs on dozens of countries deemed to have adverse trade imbalances with America. The U.S. Supreme Court invalidated the tariffs in February 2026, and the Trump administration recently reinstated sweeping global tariffs ranging from 10% to 12.5% on select imports.
Those tariff moves are part of why prices remain part of the COLA story. The expected increase is not just a math exercise; it reflects the same consumer-price pressure that can lift benefit checks.
Strait of Hormuz closure
Trump approved military action against Iran on Feb. 28, and Iran closed the Strait of Hormuz to virtually all maritime traffic shortly after that military action. The closure has persisted almost continuously for six months and has stymied the flow of a fifth of the world’s petroleum liquids.
Rerouted shipments, altered supply chains, and higher costs for petroleum-based products have reached the broader U.S. economy. For Social Security recipients, that means the 3.6% projection sits on top of a price environment shaped by fuel costs as well as tariffs, and the final Oct. 14 data will show whether that estimate holds or shifts.
The practical next step is simple: the September inflation release on Oct. 14 will tell whether the projected 2027 Social Security COLA stays near 3.6% or moves before benefit notices go out.
