Understanding the 2026 U.S. Partial Government Shutdown: Causes, Impact, and History

What is a partial government shutdown?

The federal government runs on 12 annual appropriations bills covering different agencies. If Congress passes all 12 bills and the president signs them, the government is fully funded for a fiscal year. A partial shutdown occurs when some, but not all, of the bills have been enacted, causing agencies funded by the remaining bills to lose appropriations. Those agencies must stop non‑essential activities under the 1884 Antideficiency Act, while essential services—such as national security, law enforcement, and in‑hospital medical care—continue but workers perform them without pay until funding is restored. Programs not subject to annual appropriations, like Social Security and Medicare, are unaffected. Because some funding bills have passed, a partial shutdown is narrower than a full shutdown and typically impacts fewer employees and services. During recent partial shutdowns, essential employees continued working without pay, while non‑essential staff were furloughed; all federal employees receive back pay when funding resumes.

When did the current partial shutdown start?

Congress was required to finalize fiscal‑year 2026 appropriations by 11:59 p.m. ET on 30 January 2026. Legislators enacted six of the 12 funding bills before the deadline, but left the rest unresolved. As a result, at 12:01 a.m. ET on 31 January 2026 (7:01 a.m. in the user’s time zone of Europe/Istanbul), funding lapsed for the departments of Defense, Homeland Security (DHS), Transportation, Health and Human Services (HHS), Labor, Treasury, Housing and Urban Development (HUD), and State, among others. This lapse triggered a partial government shutdown for the unfunded agencies. The House of Representatives was not scheduled to return until Monday, so the shutdown continued through the weekend.

Which employees and services are affected?

Affected agencies and furloughs

Under the shutdown plans filed with the Office of Management and Budget, agencies funded by the unfunded appropriations bills had to furlough non‑essential employees. The Departments of Defense, Education, Treasury (including the Internal Revenue Service), Labor, HHS (excluding the Food & Drug Administration, which already had appropriations), DHS, HUD, and Transportation were among those affected.

• Defense: Active‑duty service members continued working without pay. Civilian workers performing critical national‑security or life‑safety functions reported for duty, but others were furloughed.
• Transportation: The Federal Aviation Administration (FAA) furloughed over 10,000 workers, but nearly 14,000 air‑traffic controllers remained on duty without pay to maintain air travel.
• Homeland Security: Border Patrol, Transportation Security Administration, and Coast Guard personnel were required to work without pay, while administrative staff were furloughed.
• Health and Human Services: Critical health programs—such as inpatient and emergency care, vaccine safety activities, and Medicare/Medicaid operations—continued. However, many agency offices closed, and grant programs and regulatory activities were delayed.
• Labor and Education: Unemployment insurance, worker safety inspection,s and student‑aid processing slowed due to furloughs, though core safety and loan disbursement functions continued.
• Treasury and IRS: Taxpayers were encouraged to file returns electronically. Customer‑service and audit employees were furloughed, while workers necessary to process electronic filings worked without pay.
• HUD and State Department: Housing assistance payments and passport issuance continued on a limited basis, but many administrative functions were suspended.

The partial shutdown affected roughly a quarter of the federal workforce. Essential staff continued working without pay, while non‑essential staff were furloughed. Under the Government Employee Fair Treatment Act of 2019, all federal employees will receive back pay once funding is restored. Furloughed employees may file for unemployment benefits in their states and repay benefits after receiving back pay.

Agencies and programs that remain funded

Because Congress enacted six appropriations bills before the deadline, several departments continued operating normally during the shutdown:

• Agriculture and FDA: Food assistance programs such as SNAP and WIC remained funded because the Agriculture/FDA bill was enacted earlier. The USDA continued routine inspections of meat and poultry.
• Commerce, Justice, and Science: The Justice Department, FBI, Commerce Department, NASA, and National Science Foundation remained open. Federal courts continued operating using reserve funds.
• Interior and Environment: National parks and the Environmental Protection Agency remained open because the Interior & Environment bill passed; however, some parks reduced services.
• Veterans Affairs: Health care and benefits for veterans continued.
• Legislative Branch: Congress’s own operations were funded through September. Mail delivery by the U.S. Postal Service continued because it is self‑funding.

Mandatory programs like Social Security, Medicare, Medicaid, and veterans’ benefits operate outside the annual appropriations process and continue paying benefits, though customer‑service functions could be delayed.

Why did the shutdown happen?

The current partial shutdown resulted from a standoff over immigration enforcement following a tragic incident in Minneapolis. In mid‑January 2026, federal immigration agents shot and killed Alex Pretti and Renée Good during an encounter. Democrats demanded that the Homeland Security funding bill include reforms such as a code of conduct for federal agents and requirements that officers display identification. They refused to support the bill without these reforms, while Republicans insisted on passing a “clean” bill.

To avoid an immediate shutdown, the Senate passed a five‑bill funding package on January 30 that temporarily extended DHS funding for two weeks. However, the House adjourned until February 2 without taking up the package. Because DHS and several other agencies lacked funding at midnight on January 30, the government entered a partial shutdown. Negotiations continued over the weekend. Lawmakers indicated that the shutdown could end quickly once the House returns and approves the bipartisan Senate package or another funding bill. Thus, the duration of this shutdown depends largely on whether Congress can agree on reforms to immigration enforcement.

How could the shutdown end?

Historically, shutdowns end when Congress passes and the president signs either:

1. Full‑year appropriations bills for the unfunded departments; or
2. A Continuing Resolution (CR) that temporarily funds agencies at previous levels to provide time for negotiation.

In this case, the Senate already passed legislation funding five departments and extending DHS funding; the House will have to approve this bill or a similar compromise. If lawmakers agree on immigration‑enforcement reforms or decide to separate DHS funding from other policy debates, a CR could end the shutdown. Conversely, failure to resolve these issues could prolong the shutdown and heighten political pressure.

Historical partial government shutdowns

Partial shutdowns have occurred several times since the late 1970s, usually for only a day or two. Below is a summary of notable partial shutdowns and their causes.

• Nov 23, 1981 (FY 1982) — 1 day (approx. 200,000–500,000 furloughed).

A budget dispute between President Ronald Reagan and the U.S. Congress triggered a short funding gap after lawmakers failed to pass a continuing resolution. Reagan pushed for deep domestic spending cuts while Congress sought to protect social programs. Essential federal services continued, and furloughed employees were later paid. Evidence cited includes UPI reporting on the temporary suspension of non-essential services and the Office of Management and Budget estimating about 200,000 furloughs.

• Oct 1–2, 1982 (FY 1983) — 1 day.

A one-day shutdown occurred when Congress did not pass a spending bill on time, prompting agencies to follow shutdown procedures until a stopgap measure (H.J.Res. 599) restored funding and resumed operations. Evidence referenced in your table points to U.S. House of Representatives historical records documenting the FY 1983 funding gap (Sept 30 to Oct 2, 1982) and the operational guidance issued to agencies.

• Oct 6–8, 1990 — 3 days.

President George H. W. Bush vetoed a budget bill amid disagreement over deficit-reduction measures, producing a shutdown that overlapped with the Columbus Day weekend. While many workers were already off duty, public sites such as national parks, museums, and the Washington Monument closed, while essential personnel (security, maintenance, animal caretakers, and similar roles) continued working. Evidence in your table cites the Smithsonian Institution, noting that museums and the Smithsonian National Zoo closed for three days while essential staff remained on duty.

• Jan 20–22, 2018 — 3 days.

The first shutdown under President Donald Trump was driven by conflict over the Deferred Action for Childhood Arrivals (DACA) program. Democrats demanded protections for “Dreamers” as part of a short-term funding deal, while Republicans resisted, resulting in a weekend shutdown. A bipartisan agreement was reached on January 22 to fund the government through Feb 8, 2018. Evidence in your table references The Guardian describing DACA protections as the central fault line in the negotiations.

• Feb 9, 2018 — ~9 hours.

Funding lapsed briefly after Senator Rand Paul delayed a Senate vote over concerns about deficits and the national debt, pushing the lapse past midnight. Lawmakers then approved a two-year budget early the next morning, and the president signed it, ending what was described as the shortest shutdown in U.S. history. Evidence cited in your table again points to The Guardian’s reporting on the delay and the eventual passage of the large funding bill.

• Dec 22, 2018 – Jan 25, 2019 — 35 days.

The longest shutdown on record at the time unfolded after President Trump demanded funding for a southern border wall. Because Congress had passed five of the 12 appropriations bills, the shutdown was partial; hundreds of thousands of federal workers were furloughed or worked without pay. The impasse ended when the president agreed to sign a short-term bill without wall funding. Evidence in your table cites the Brookings Institution, noting both the “partial shutdown” structure and the 35-day duration tied to the border-wall dispute.

Oct 1 – Nov 12, 2025 — 43 days (The longest shutdown in history).

A prolonged shutdown triggered by a standoff over whether a funding package should include an extension of enhanced Affordable Care Act tax credits versus a “clean” spending bill without the subsidy. It adds that President Trump kept the House in recess and tried to pressure Democrats through project cancellations and layoff threats, and that the shutdown ended after 43 days when a bipartisan Senate group brokered a compromise: three appropriations bills funded, remaining funding extended through Jan 30, and a commitment to a future vote on the health-care subsidies. Evidence referenced in your table is a report attributed to PBS / Associated Press describing the bargaining lines and the eventual compromise outcome.

These episodes demonstrate that most past shutdowns were brief and often driven by specific policy disputes—whether over social spending cuts, deficit reduction, immigration, or health‑care policy. The 2018–2019 and 2025 episodes, both of which occurred when some appropriations bills had been enacted, stand out as the longest partial shutdowns in U.S. history.

Conclusion

The current partial government shutdown began on January 31, 202,6 because Congress failed to pass six of the 12 appropriations bills and lawmakers clashed over reforms to immigration enforcement following deadly shootings by federal agents. Unfunded agencies—most notably the Departments of Defense, Homeland Security, Transportation, Labor, HHS, HUD, and Treasury—have furloughed non‑essential workers, while essential personnel continue working without pay. Meanwhile, agencies funded under enacted bills—including Agriculture, Justice, Interior, Veterans Affairs, and the legislative branch—remain open, and mandatory programs like Social Security and Medicare continue paying benefits. The shutdown can end once Congress and the president agree on funding the remaining departments, either through a continuing resolution or full‑year appropriations, and resolve the dispute over immigration‑enforcement reforms. Historical experience suggests that political pressure builds quickly during shutdowns, encouraging lawmakers to reach a compromise.