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Explainer

Three benefit resets, three agencies, eight weeks

Between October 1 and December 7, three separate federal calendars turn over. They’re run by three agencies that don’t coordinate with each other — and only one of the three has a deadline you can miss.

Most households we hear from treat autumn as one event: “the new numbers come out.” They don’t. Three things reset, in a fixed order, on three unrelated schedules — and the difference between them matters, because two happen to you automatically and one requires you to act.

Here they are in the order they land.

1. October 1

   SNAP standards reset

   U.S. Department of Agriculture · Food and Nutrition Service

   Maximum allotments, income eligibility standards, and deductions all change with the start of the federal fiscal year. There is no announcement — the new tables are posted to a USDA web page. Nothing for you to do, but if you were denied on income earlier in the year, this is the date that makes it worth asking again. More on the SNAP reset →

2. Mid-October

   Social Security announces the COLA

   Social Security Administration

   The cost-of-living adjustment, plus the earnings limits and the taxable maximum for the coming year. This is the one that makes the news. It’s also the one that’s already arithmetically settled before it’s announced — it’s computed from July, August, and September price data. Nothing for you to do. The increase appears automatically in January. How the calculation works →

3. October 15 – December 7

   Medicare Open Enrollment

   Centers for Medicare & Medicaid Services

   The window to join, drop, or switch a Medicare Advantage plan, or to add, drop, or change a Part D drug plan. Coverage from any change starts January 1 — and your plan must receive your request by December 7. This is the only one of the three with a deadline, and the only one where doing nothing is itself a decision: if you make no change, you’re re-enrolled in your current plan at whatever its new prices are.

One more window, on the other side of the new year

If you’re already enrolled in a Medicare Advantage plan and you change your mind after December 7, you aren’t stuck for the year. The Medicare Advantage Open Enrollment Period runs January 1 through March 31, and it lets you switch to another Medicare Advantage plan or drop back to Original Medicare. It’s narrower than the fall window — it’s only for people already in an Advantage plan — but it’s a real second chance, and very few people know it exists.

What we’d actually put on a calendar

• Early October — check the USDA SNAP page if anyone in your household receives, or was denied, food assistance.
• Mid-October — the COLA is announced. Note it; don’t budget on it yet.
• When your plan’s mail arrives — read the notice your Medicare plan sends about next year’s changes before Open Enrollment opens. This is the only piece of mail in the sequence that is specific to you.
• By December 7 — any Medicare plan change must be in your plan’s hands. Not postmarked. Received.
• November, then again in January — the Part B premium is announced, and your actual January deposit tells you what the raise was really worth.

Claim → source

Claim in this story	Source
SNAP standards, allotments, and deductions adjust at the beginning of the federal fiscal year, October 1	USDA Food and Nutrition Service, SNAP Cost-of-Living Adjustment (COLA) Information
The COLA is calculated from CPI-W for the third quarter (July–September)	Social Security Administration, Cost-of-Living Adjustment (COLA) Information
Medicare Open Enrollment runs October 15 – December 7	Medicare.gov, Joining a plan
Coverage begins January 1 of the next year, and the plan must get your enrollment request by December 7	Medicare.gov, Joining a plan
Medicare Advantage Open Enrollment Period runs January 1 – March 31 for people already in an Advantage plan	Medicare.gov, Joining a plan