CCC'26 will be held from August 3-6, 2026 in Lisbon, Portugal. The conference will happen at the Faculty of Sciences of the University of Lisbon. A map can be found at this link.

CCC'26 features a program of several talks, including the inaugural Test-of-Time invited talk, spread over four days.

The conference will not have any tutorials, but you are welcome to attend the associated workshop:


whose registration is free and which will provide several travel allowances for attendees.

The conference fees include lunch for all four days of the conference. You can expect standard fare Portuguese food (one meat dish and one fish dish to choose from, with carbs and veggies on the side) plus a vegetarian option.

The detailed schedule is not yet available.

Registration is at the following link:


(if there are any issues with the form please email us). The registration fees are: 

Registration Fees (EUR / USD)
	Early (until July 10)	Late (July 11 or later)
Student	€190 ≈ $225	€220 ≈ $260
Non-student	€300 ≈ $350	€340 ≈ $400

You can find many hotels in Lisbon, but we urge you to book soon, as Lisbon is quite booked during the summer.

The crucial think to try is to find a stay near the green or yellow subway lines. This will give you a direct subway to the Campo Grande metro station, which is a 10 minute walk to the C6 building in campus, where the talks will be held. The Cidade Universitária metro station on the yellow line is even closer (a 5m walk to C6). Don't take a taxi or a bus, traffic is terrible during rush hours (7:30-10am, 4:30-7:30pm.)

If you need a visa to enter Portugal, please get in touch with the local arrangements chair to get a letter to obtain your visa.

If you would like to receive announcements about future activities and events in complexity, you can subscribe to the CCC announcements Google group.

We collect your registration information to facilitate event planning and communication (Legal Basis: Contractual Necessity). Your name, email, status, and affiliation are shared with the Executive Committee of the Computational Complexity Foundation (CCF) to determine the electorate for CCF Board elections and for attendance statistics (Legal Basis: Legitimate Interest). Because the CCF is based in the United States, your data will be transferred outside the European Economic Area (EEA). This transfer is conducted under appropriate safeguards to ensure your data remains protected. Individual records are kept for no more than four years. Statistical data are kept indefinitely. You have the right to access, correct, or delete your personal data, and to object to its processing. To exercise these rights or for any privacy inquiries, please contact the CCF Executive Committee at executive@computationalcomplexity.org. You also have the right to lodge a complaint with a Data Protection Authority.

The open exchange of ideas and the freedom of thought and expression are central to the aims and goals of CCC. These require an environment that recognizes the inherent worth of every person and group, that fosters dignity, understanding, and mutual respect, and that embraces diversity. The CCC'26 organizers are committed to providing an environment that is free of discrimination and harassment, and expect all participants to honor that commitment.

CCC 2026 is a participant in the SafeTOC initiative.

• Bruno Loff (Chair), University of Lisbon
• Diogo Poças, University of Lisbon
  
• João Ribeiro, University of Lisbon

Please email the local arrangements team.