2027 COLA projected 3.4-3.6% (average 3.5%) driven by Trump tariffs and Iran war oil-price impacts — sixth consecutive year at/above 2.5% (last matched 1988-1997): Ongoing global tariffs on select imports and Iran closing Strait of Hormuz after February 2026 attacks sending petroleum prices soaring — both exerting upward pressure on inflation — projected 3.5% average would tie for sixth-largest COLA in 35 years — beneficiaries receiving 71M+ retirees/disabled workers averaging $1,940 monthly receiving meaningful raise.

Historic silver lining: 2027 Medicare Part B premium increase (3.25% to $209.50/month) projected lower than Social Security COLA for first time since 2023: For past 12+ years Part B premiums consistently outpaced COLA, eroding purchasing power gains — Social Security recipients losing 20% in real buying power 2010-2024 — 2026 example: COLA 2.8% while Part B jumped 9.7% — 2027 COLA projected higher than premium increase allowing beneficiaries to retain more of annual raise.

Silver lining won't recover decades of lost purchasing power but provides temporary relief from erosion pattern: Part B premium deducted directly from monthly benefits limiting effective raise beneficiaries receive — 2024 Part B jumped 5.9%, 2025 jumped 5.9%, 2026 jumped 9.7% vs. corresponding COLAs of 3.2%, 2.5%, 2.8% — improved ratio in 2027 allows Social Security beneficiaries to keep more of their cost-of-living adjustment for first time in years.

SSI recipients paid September 1 (early because Aug 1 weekend); birth-date schedule: Sept 9 (1-10), Sept 16 (11-20), Sept 23 (21-31) — those receiving SS before May 1997 paid Sept 3: 71.3 million people received average $1,940.08 monthly in July 2026 — retired workers averaged $2,085.98, disabled workers $1,635.27 — 7.3 million SSI recipients averaged $736.54 — total 75.7 million receiving Social Security/SSI/both — allow three working days if payment missing before contacting SSA.

2027 COLA now projected 3.6% (down from 3.8% in June/July) based on inflation trends — official announcement October after September CPI-W data released: Senior Citizens League revised forecast down as inflation cooled in August — AARP similarly lowered to 3.5% — increase larger than 2.8% COLA received January 2026 but smaller than earlier summer projections — based on July-August-September average CPI-W compared to prior year same months.

OASI trust fund projected to deplete Q4 2032 leaving only 78% of scheduled benefits payable without Congressional action: Dual-income couples retiring in 2033 could lose nearly $17,000 annually starting then — combined retirement/disability funds sufficient through 2034 (83% of benefits after) — Congress has six years to act on solvency through payroll tax increases, benefit changes, retirement age adjustments, or combined approach.

Medicare beneficiaries enrolling in Medicare Advantage at age 65 get one-time 12-month trial period to test plan then return to Original Medicare without penalties: Trial window allows switching back to Original Medicare and buying Medigap supplemental insurance without medical underwriting — critical protection for beneficiaries discovering network limitations, denied claims, or coverage gaps after enrollment — only applies to first Medicare Advantage enrollment at 65; cannot be used again if beneficiary rejoins Advantage later.

Guaranteed-issue Medigap window closes 63 days after leaving Medicare Advantage — missing deadline exposes beneficiaries to unlimited healthcare costs: Original Medicare has no annual out-of-pocket cap; beneficiaries owe 20% coinsurance for outpatient services with no ceiling — conditions like diabetes with complications, recent cancer treatment, heart failure may result in higher premiums or denial of Medigap coverage after medical underwriting — four states (Connecticut, New York, Massachusetts, Maine) provide additional guaranteed-issue protections but most have limited annual windows.

Real-world example: 66-year-old discovers orthopedist dropped network, MRI prior authorizations denied twice at 14 months — too late for guaranteed-issue protection: Many beneficiaries wait past trial period before realizing plan doesn't work, then forced into Original Medicare without supplemental coverage option — should act immediately if discovering network issues, claim denials, or provider changes during first year.