Changes from 2025
ACM Open
Starting January 1, 2026, ACM will fully transition to Open Access. All ACM publications, including those from ACM-sponsored conferences, will be 100% Open Access. Authors will have two primary options for publishing Open Access articles with ACM: the ACM Open institutional model or by paying Article Processing Charges (APCs). With over 1,800 institutions already part of ACM Open, the majority of ACM-sponsored conference papers will not require APCs from authors or conferences (currently, around 70-75%).
Authors from institutions not participating in ACM Open will need to pay an APC to publish their papers, unless they qualify for a financial or discretionary waiver. To find out whether an APC applies to your article, please consult the list of participating institutions in ACM Open and review the APC Waivers and Discounts Policy. Keep in mind that waivers are rare and are granted based on specific criteria set by ACM.
Understanding that this change could present financial challenges, ACM has approved a temporary subsidy for 2026 to ease the transition and allow more time for institutions to join ACM Open. The subsidy will offer:
- $250 APC for ACM/SIG members
- $350 for non-members
This represents a 65% discount, funded directly by ACM. Authors are encouraged to help advocate for their institutions to join ACM Open during this transition period.
This temporary subsidized pricing will apply to all conferences scheduled for 2026.
Contact the ACM for more information at dl-info@hq.acm.org.
Workshop papers in CEUR proceedings
The aforementioned ACM Open policy makes a distinction between two types of content in the proceedings: (1) those that will have to pay the APCs (either directly or through institutional membership of ACM Open), and (2) those that do not.
APC-eligible
- Full papers
- Short papers
Non-APC-eligible
- Demo papers
- Late-breaking results (LBR) papers
- Industry papers
- Keynote abstracts
- Doctoral Consortium abstracts
- Workshop summary papers
- Tutorial summary papers
In more recent editions of UMAP, the workshop papers accepted at the different UMAP workshops were published in the Adjunct Proceedings, with the full, short and LBR paper included in the Main Proceedings. Continuing this policy would mean that workshop papers themselves would also fall under ACM’s Open Access fee scheme. To lower the threshold for people to participate in the UMAP workshops, we will publish all accepted workshop papers in a single CEUR WS volume. All other content will be published in a single UMAP proceedings volume, thereby removing the distinction between Main and Adjunct ACM proceedings for UMAP.
Registration fee policy
UMAP 2026 will require each accepted paper or other type of submission to have at least one registered author attending the conference. However, authors presenting multiple accepted papers will only need to pay a single registration fee, regardless of the number of papers they are presenting. This is in contrast with UMAP 2025, where each submitted paper required a separate registration fee to be paid.