Publishers of academic monographs and edited volumes have a narrowing compliance window in 2026. Institutional guidance issued by research offices across the European Research Area has now confirmed what many university presses suspected was coming: the Horizon Europe monograph open access requirement is being applied as an immediate, no-embargo obligation, not the softer “within twelve months” allowance that long-form outputs enjoyed under Horizon 2020. For scholarly and university-press publishers still relying on embargo windows to protect print sales, the operational implications are significant.
The shift matters because monographs and edited volumes occupy a different economic and editorial position from journal articles. Peer review cycles are longer, production costs are higher, and many presses depend on frontlist sales in the first year after publication to recoup costs. A mandate that removes the embargo option for Horizon Europe-funded books effectively forces a shift toward open-access business models — book processing charges, subvention funds, or collective funding mechanisms — well before most presses had budgeted for it.
The Horizon Europe Monograph Open Access Mandate: What Changed
Horizon Europe’s Model Grant Agreement has, since the programme’s launch, required beneficiaries to ensure open access to peer-reviewed scientific publications arising from funded research, with deposit in a trusted repository at the latest at the time of publication. For journal articles this has meant immediate open access with no embargo permitted — a marked tightening compared with Horizon 2020. Monographs, book chapters and other long-form outputs, however, historically sat in a grey zone: guidance permitted longer embargoes given the different production and revenue model of long-form scholarly publishing.
Institutional research offices are now reporting that this grey zone has closed. Updated guidance interpreting the Annotated Grant Agreement treats monographs and edited volumes arising from Horizon Europe grants as subject to the same immediate open access expectation as articles, with limited scope for embargo exceptions and only where a beneficiary can demonstrate a documented conflict with legitimate commercial interests, such as a pre-existing publishing contract negotiated before the mandate took effect. In practice, this means grant-holders negotiating new book contracts from 2026 onward should assume zero embargo is the default position, not the exception.
CC Licensing Rules for Long-Form Outputs
The licensing dimension is equally consequential. Horizon Europe’s default licensing requirement is CC BY (or a licence with equivalent rights) for the version of record or the final peer-reviewed manuscript, with CC BY-ND permitted in specific cases where the beneficiary can justify it — for instance, to protect the integrity of a monograph’s narrative argument or illustrative content from unauthorised adaptation. For edited volumes with multiple contributing authors, this creates a coordination burden that journal publishers rarely face: every contributor’s chapter must carry a licence consistent with the funder mandate, and permissions for third-party material (images, maps, quoted text) must be cleared for reuse under an open licence rather than the more restrictive “all rights reserved” terms many presses still default to in contracts.
Publishers should also note that Horizon Europe’s guidance treats the CC licensing requirement as attaching to the funded output itself, not to the press’s broader catalogue. This means a single edited volume may need to carry different licensing terms for different chapters if only some contributors were funded by Horizon Europe grants — a scenario production and rights teams need workflow support to manage rather than resolving case-by-case at proof stage.
Which Horizon Europe Calls Are Affected
The monograph mandate is not confined to a single funding stream. It applies wherever a Horizon Europe grant supports the underlying research, which means publishers should expect it across the full spread of Horizon Europe calls that fund book-length outputs — most visibly in Cluster 2 (Culture, Creativity and Inclusive Society), where monographs remain a primary dissemination format, but increasingly in interdisciplinary projects funded through Horizon Europe cluster 5 calls (Climate, Energy and Mobility) where policy-facing edited volumes and technical assessment books are common outputs. The Horizon Europe work programme 2025 carried forward the same open access conditions into 2026-funded actions, so presses handling manuscripts from projects awarded under that programme are already inside the compliance window.
Health-focused publishers should pay particular attention. Horizon Europe health calls 2026 continue to fund large collaborative projects that frequently produce edited clinical or public-health volumes alongside journal outputs, and the European Commission’s open science requirements apply equally to both formats. University presses that have historically treated health-adjacent edited volumes as a niche, lower-volume category may find that Horizon Europe-funded health projects now represent a disproportionate share of their open-access compliance workload, simply because health clusters fund so many large consortia.
Attribution and Contributor Roles in Edited Volumes
Open access mandates for long-form outputs also intersect with a separate but related trend: growing demand for standardised, machine-readable contributor attribution in multi-author books. Journal publishers have widely adopted the CRediT contributor role taxonomy to disambiguate who did what across large author lists; edited volumes with dozens of chapter authors face an analogous — arguably more acute — attribution challenge. CASRAI originated the CRediT contributor role taxonomy in 2014. The standard is now stewarded by NISO as ANSI/NISO Z39.104-2022. Presses building open-access metadata workflows for Horizon Europe-funded volumes should consider whether chapter-level contributor statements, alongside ORCID identifiers for editors and authors, would strengthen compliance reporting to funders and simplify downstream indexing by DataCite and CrossRef.
What This Means for Research Administrators
For research offices and grant administrators, the practical consequences fall into four areas:
- Contract review: existing book contracts negotiated before a project’s Horizon Europe award should be audited for embargo and licensing clauses that now conflict with grant conditions.
- Budgeting for book processing charges: administrators should confirm with principal investigators whether monograph publication costs have been included in the project budget, since immediate CC BY publication is rarely free.
- Repository deposit workflows: institutional repositories need to support long-form deposit (full manuscripts, not just abstracts) at the point of publication, which is a different technical and rights-clearance workload than article deposit.
- Coordination with university presses: where the institution operates its own press, research offices should establish a standing liaison so that acquisitions editors flag Horizon Europe-funded projects at contract stage, not at the point of camera-ready delivery.
Organisations such as EARMA and ARMA have both flagged long-form open access compliance as an emerging gap in research administration training, and institutions preparing for the next REF cycle in the UK should note that funder-mandated open access terms for books can diverge from REF open access requirements, creating dual-compliance obligations that need to be reconciled rather than assumed to be identical.
Looking Ahead
The direction of travel is unambiguous: funders are converging on the position that “open access” means immediate, machine-readable, openly licensed access regardless of output format, and the historical carve-out for monographs is narrowing across the research funding landscape, not only within Horizon Europe. Publishers that build book-processing-charge models, chapter-level rights workflows and CC BY-compliant production pipelines now will be better positioned as other funders — building on cOAlition S’s long-standing work on open access books — follow the same trajectory. For scholarly and university-press publishers, 2026 is the year monograph open access stops being a policy aspiration and becomes a contractual condition of funding.
