Tribunal Administrativo de Círculo de Lisboa Books a 45-Fold Climb in AIMA Deportation-Order Challenges From 11 Cases in January 2025 to 496 in April 2026 — 2,271 Pending Cases as the New Return Law Beds In

The Tribunal Administrativo de Círculo de Lisboa (TAC Lisboa) — the administrative court that handles every national legal challenge against the Agência para a Integração, Migrações e Asilo (AIMA), regardless of where the applicant lives in Portugal — logged a record 496 new impugnação and providência cautelar filings in April 2026 against the immigration agency's deportation orders, voluntary-departure determinations and residence-permit denials. The April reading is the highest single-month inflow since the file series began in January 2025 and represents a roughly 45-fold climb from the 11 cases booked that month, with the monthly count crossing the operationally meaningful threshold of 100 cases for the first time in August 2025 and clearing 400 from September onwards.

The Monthly Inflow Curve

• January 2025: 11 new cases (the operational baseline).
• August 2025: 112 new cases (first monthly count above 100).
• September 2025: 440 new cases (the inflection month, coincident with the post-SEF AIMA backlog clearing into the courts).
• April 2026: 496 new cases — the all-time monthly high.

The April reading is up roughly 13% on September and lands while the operational dust on the new Lei do Estrangeiro framework (the Return Law that extends detention to 18 months and the broader fast-track deportation framework) is still unsettled — the Lei da Nacionalidade reform took effect on 19 May 2026 and the appeal windows on AIMA's spring decision batches are still open.

The Pending-Caseload Side of the Ledger

As of 21 May 2026, the TAC Lisboa carries 2,271 pending cases across the impugnação and providência cautelar categories that target AIMA's enforcement and denial decisions. That count sits on top of a much larger pool of administrative cases relating to residence authorisations, AIMA interview-scheduling intimações and family-reunification proceedings: 128,851 pending cases in May 2026, down from 133,429 in October 2025 and 129,239 in March 2026 — a 388-case net reduction in two months as the judicial-reinforcement effort starts to show.

The inflow into the bigger residence-and-family-reunification file shows a clearer pattern around the new Return Law's commencement:

• October 2025: 11,705 new residence-and-reunification cases.
• November 2025: 3,484 new cases — a steep drop coincident with the new Foreigner's Law taking effect.
• March 2026: 4,579 new cases.
• April 2026: 5,874 new cases — back on a clear upward trajectory.

What's Driving the Climb

Three operational factors are stacking on top of each other to push the deportation-challenge file:

• AIMA's enforcement throughput. The post-SEF agency cleared a meaningful share of its 2024-2025 backlog through formal decisions across the second half of 2025 and into 2026, which mechanically converts a queue of pending files into a queue of appealable adverse decisions.
• The new Return Law cycle. The October 2025 23,000-deportation-order tape and the manifestação-de-interesse revocation framework converted a procedural pause into a wave of enforcement decisions — each of which is appealable inside the 30-day window in the Código de Procedimento Administrativo.
• Counsel availability. The Ordem dos Advogados, immigration-focused law firms in Lisbon and the foreign-resident associations (notably the Solidariedade Imigrante-adjacent network) have ramped litigation capacity through 2025 and into 2026.

The Bench's Concern

The administrative-court judges flagged the curve as the operational risk of a repeat of the post-SEF litigation surge that followed the agency's extinction in October 2023. The 2023-2024 wave of providências cautelares against the residual SEF and the new AIMA was the precedent that triggered the judicial-reinforcement protocols still in effect — and the April 2026 reading sits inside the range where the protocols start to compress hearing dates and lengthen case-disposal cycles. The 388-case net reduction in pending cases between March and May is a thin operational margin against a 5,874-case April inflow.

What This Means for Expats

• If you have an AIMA adverse decision in hand: The 30-day window under the Código de Procedimento Administrativo runs from notification, and the impugnação or providência cautelar filing has to clear the TAC Lisboa intake by the deadline regardless of where you live. Same-day filing through an immigration-specialist lawyer is the operational default — not the upper bound.
• If you have a pending AIMA file: The 128,851-case pool means the median wait for a substantive AIMA decision is still measured in months. The judicial-reinforcement effort is producing a small net reduction in the pool, not yet a re-acceleration of the file.
• Family-reunification specifics: The April 2026 inflow of 5,874 new cases on the broader residence file (reagrupamento included) is back on trend after the November dip. Our Reagrupamento Familiar guide covers the procedural rails.
• Voluntary departure vs forced expulsion: The retorno voluntário programme (which has now logged 1,086 departures since UNEF stood up) is procedurally distinct from a forced-expulsion order — accepting the voluntary route generally forecloses the impugnação route, and the time-pressure on that choice is one of the operational stress-points in the bench's warning.
• Counsel selection: The Ordem dos Advogados maintains a public register; immigration-specialist counsel concentrated in Lisbon, Porto and the Algarve is the practical pool. Apoio judiciário (legal aid) is available subject to means-testing.

Sources: RTP and ECO reporting on the TAC Lisboa caseload as of 21 May 2026; AIMA decision counts; Conselho Superior dos Tribunais Administrativos e Fiscais data on pending cases; Código de Procedimento Administrativo on appeal windows.