Current federal appropriations expire at midnight on September 30, the last day of fiscal year 2026, setting up a fourth possible funding lapse in a single fiscal year that has already produced three. A 43-day closure from October 1, 2025, through November 12 became the longest government shutdown in modern history, a second brief lapse hit at the end of January, and the Department of Homeland Security went unfunded for roughly ten weeks from February 14 to April 30. Through every one of those closures, Social Security and Medicare benefit checks kept arriving, because neither program draws its money from the annual spending bills that keep expiring.
Three Funding Lapses Already Tested the Mandatory-Spending Firewall
The distinction that kept those checks moving is written into how each program is financed, not into any shutdown-specific promise. Social Security retirement and disability benefits are paid from trust funds Congress financed on a permanent basis, sitting outside the twelve annual appropriations bills that fund discretionary agencies. Medicare’s hospital and physician coverage relies on the same kind of standing trust-fund authority. Mandatory programs such as Social Security, Medicare, and Medicaid keep operating through a lapse in appropriations, unlike the discretionary agencies that must furlough non-essential staff until Congress acts.
That arrangement held through the first two FY2026 lapses. It held during the 43-day shutdown that ran from October 1, 2025, to November 12, triggered by a fight over expiring Affordable Care Act tax credits and now the longest funding gap in modern American history. It held again during a shorter partial lapse between January 31 and February 3, when six of the year’s twelve appropriations bills briefly went unfunded before a stopgap measure passed.
The mandatory-spending exemption held a third time through a funding gap specific to a single department. The Department of Homeland Security’s own shutdown, a dispute centered on funding for Immigration and Customs Enforcement and Border Security Operations, stretched from February 14 through April 30, 2026, before a final bill excluded that ICE and BSO money and Congress moved it into the separate reconciliation process instead. Beneficiaries never had a Social Security or Medicare payment withheld across any of the three closures, because Congress disagreeing on discretionary spending has no legal effect on trust-fund outlays.
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What Actually Stops: Verification, New Cards, and Enrollment Processing
The mandatory-spending shield covers benefit payments, not every function the Social Security Administration and the Centers for Medicare & Medicaid Services perform for beneficiaries. The Committee for a Responsible Federal Budget’s shutdown Q&A notes that a lapse in discretionary funding halts new Social Security card issuance and Medicare benefit verification even while checks keep moving, and the strain is not theoretical. During the 1995-1996 shutdowns, more than 10,000 Medicare applicants were turned away every day the government stayed closed, unable to get new enrollment processed while the agency’s core payment systems ran without interruption.
The immediate risk if a fourth lapse occurs sits inside the calendar as much as the ledger. Medicare’s Fall Open Enrollment period runs from October 15 through December 7, the exact window when a September 30 funding gap would collide with peak demand for plan changes, new Medicare Advantage enrollments, and benefit-verification calls. Retirees weighing those choices this year are also watching two numbers that moved in opposite directions in January: the 2.8 percent cost-of-living adjustment lifted the average Social Security retirement benefit to $2,071 a month for 2026, up from $2,015, while the standard Medicare Part B premium rose to $202.90, an increase of nearly 10 percent over 2025’s $185.00, often deducted directly from that same check.
The Stopgap Racing the September 30 Clock
Congress is not waiting until the last moment to attempt a fix this time. The House passed a continuing resolution extending funding through December 4 on a 220-205 vote in July, and the Senate countered on August 8 with its own version pushing the deadline to December 11, passing 90-6. That Senate-amended measure, H.R. 6500, then went back to the House, which returned from its August recess to take it up roughly a month before current appropriations would otherwise lapse.
The administration has signaled it wants the stopgap to pass. In a formal statement of administration policy, the White House said President Trump strongly opposes another futile government shutdown, an unusually direct endorsement of a clean continuing resolution that changes none of the underlying policy fights still splitting the House and Senate over full-year spending bills. Passing a short-term patch does not resolve those disputes; it pushes the same twelve-bill appropriations fight into December, when Congress faces a deadline again in the middle of holiday-season legislating.
What the pattern this year makes clear is that a funding lapse and a benefit interruption are two different events that happen to share a start date. Three separate closures already proved that Social Security and Medicare payments do not depend on whether Capitol Hill can agree on discretionary spending levels, even as those same closures showed the agencies’ non-payment functions are exactly as vulnerable as any other discretionary program tied to annual appropriations.
The open question is not whether the September 30 deadline will again test that split; it already has, three times since October. It is whether a fourth near-miss, approached this time with weeks rather than hours to spare, marks a change in how this Congress manages the appropriations calendar, or simply moves the same unresolved fight to a December deadline that arrives with its own set of pressures.
This article was researched and drafted with the assistance of artificial intelligence.
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