Why charge a fee for an online conference?

We have received several messages about the fees we charge for the ICRC 2021. Perhaps some are misled to believe, that organising an online meeting has no cost.
But the situation is very much different for a large conference such as the ICRC: 2 weeks with about 1000 participants, with a wealth of papers, presentations, discussions, with plenary and parallel sessions, and with the aim to archive all the materials (proceedings papers, discussions, presentation slides and recordings) from the start of the conference for a long time.

Detailed Statement

We are very happy to announce that we have received about 1400 abstracts from about 54 countries and from all parts of astroparticle physics. With this, the capacity for abstracts to the ICRC has been reached.  
Thank you very much for the great response.

Conference Fee

Attend only 80 € per participant
Present a contribution 50 € per contribution
Young Scientists reducedDeadline 1 July
Undergraduate Students freeDeadline 1 July
After 1 July 2021:
Late registration
no discounts
200 € per participant



Register  here  for access to all parts of the conference (all days, live streams, recorded presentations, discussion sessions, proceedings articles, ...) without presenting anything yourself. Registration opens on 15 January and closes on 10 July 2021.
The fee for access to all parts of the conference is 80 € per person.
Regular registration ends on 30 June. Beyond that date late registration fee 200 € applies and no discounts are given any more.

Abstract Submission is already closed.


Industry Fair

We invite you to participate in this conference, learn about the technological challenges and solutions of the field, promote your products and services, and get in contact with the participants. As exhibitor, you will benefit from excellent exposure to the conference participants and get your products and services known to a community in a booming and technologically challenging research field.

For more information, please check the attached flyer or contact
To register, please fill the form:

The application period ends 30 June 2021.


Science Fair

We invite collaborations and individuals to present their experiment or observatory and to showcase anything relevant, interesting or peculiar about Astroparticle Physics, that does not fit easily into a science talk or poster. Be it artistic photos, stunning film clips, new project descriptions, outreach projects, anything of potential interest to ICRC participants is welcome. Share your enthusiasm about Astroparticle Physics and find colleagues with similar interests.

For more information, please check the flyer.
To register, please send the following information to
  • Name and email contact of the presenter
  • Collaboration (if available)
  • Title of the contribution
  • Short abstract describing your project (max. 200 words)

The application period ends 30 June 2021.


As participant of the Industry or Science Fair you have the possibility to present your company or project and get in direct contact with the conference participants during the “Presenter Forum”.

The “Presenter Forum” is scheduled for two time slots to be reachable for participants from all time zones. The two slots are Fri 16 Jul, 18:00-20:00 and Mon 19 Jul, 12:00-14:00 (Berlin time). We use the remo tool ( for that. Each project will be assigned a virtual “table" for up to 5 visitors (in a meeting “room", on a “floor", in a “building”) with a whiteboard where posters, slides and papers can be shown and discussed.