Open Access Mandates in 2026: What Researchers Actually Need to Do

Open access mandates have become more operational and less theoretical. They now affect:

• what licence you need
• whether embargo is allowed
• whether the accepted manuscript can be deposited immediately
• whether APC funding is reimbursable
• whether a repository counts as compliant

That means policy is no longer a final-stage administrative detail. It is a submission constraint.

That table is only a starting point. The important part is how the differences affect actual journal decisions.

The NIH change is not speculative anymore. It is already live.

Official NIH policy pages state that the 2024 NIH Public Access Policy went into effect on July 1, 2025. For manuscripts accepted on or after that date:

• the Author Accepted Manuscript must be submitted to PubMed Central upon acceptance for publication
• public availability must occur without embargo on the official publication date

This is a big workflow shift because it compresses timing.

Under the older mental model, authors often assumed there was more room for delayed compliance. In the current NIH framework, the accepted manuscript and rights situation need to be thought about much earlier.

What authors should do differently for NIH-funded work

• check whether the journal allows the accepted manuscript route cleanly
• make sure author agreements do not block PMC deposit timing
• coordinate with your institution early if rights or licensing language is complicated
• do not assume an embargoed subscription workflow will remain easy to reconcile

If your manuscript acknowledges NIH funding, this is no longer a minor afterthought.

UKRI's open access policy remains one of the clearer systems because it gives authors two routes.

UKRI's official guidance states that for in-scope peer-reviewed research articles submitted on or after April 1, 2022, authors can comply either by:

1. publishing the article open access in the journal or platform
2. publishing in a subscription journal and depositing the Author Accepted Manuscript in an institutional or subject repository at final publication with a permitted licence and no embargo

That second route matters a lot.

Many authors still assume compliance means paying an APC. Under UKRI, repository deposit can still be a valid route when the journal setup permits it.

What authors should actually check under UKRI

• whether the journal allows immediate repository deposit at publication
• what licence is required, usually CC BY or another permitted licence
• whether your institutional open access team already has a compliant pathway
• whether the article type is in scope

The practical consequence is that some subscription journals remain usable for UKRI-funded work, but only if the repository route is genuinely compliant.

Plan S is sometimes discussed like a historical milestone rather than a live policy frame. That is a mistake.

Official cOAlition S materials continue to define the core principle in straightforward terms: funded scholarly publications should be openly available immediately, either through compliant open-access journals or platforms, or through immediate repository availability without embargo.

Plan S materials also continue to emphasize:

• author or institutional rights retention
• open licensing, preferably CC BY
• repository compliance where repository routes are used

The exact implementation varies by funder, but the practical spirit remains the same:

delay is the enemy, and rights matter.

What authors often misunderstand about Plan S

They think it only applies if they publish in a fully open-access journal.

That is not the whole picture. Plan S guidance explicitly recognizes multiple compliant routes, including repository-based routes when immediate open access requirements are met. The harder issue is not whether there is one route. It is whether your chosen journal actually supports a compliant one.

ERC and broader Horizon Europe obligations are often harder for authors to interpret because they live inside grant-agreement logic rather than a single short policy page.

Current ERC open-science guidance and scientific reporting materials point to several relevant realities:

• peer-reviewed publications must be made open access
• accepted manuscripts or published versions should be deposited in an open-access repository
• under Horizon Europe, repositories must be trusted
• ERC guidance also notes that for Horizon Europe projects, only fees for full open-access publication venues are reimbursable as direct costs from the ERC grant

This matters because authors sometimes assume hybrid payment and full compliance are interchangeable in all grant environments. They are not.

What authors funded through ERC or Horizon Europe should do

• verify the repository route early
• check whether the journal's route fits trusted-repository expectations
• confirm whether APC reimbursement assumptions are actually valid for that venue
• make sure metadata and funding acknowledgments are repository-ready

In practice, ERC and Horizon Europe compliance often turns into a venue-selection problem earlier than authors expect.

Authors choose the journal first, then ask whether compliance is possible.

That is backwards.

A better order is:

1. identify your funder's actual current requirements
2. short-list journals with a clearly compliant route
3. then decide among those journals on fit, ambition, and manuscript readiness

This sequence is especially important if the paper is close to the border between a hybrid subscription venue and a fully open route.

This is where metrics and prestige can mislead.

A journal may have:

• strong citation metrics
• excellent prestige signaling
• the right audience

and still be a poor compliance choice if:

• embargo is incompatible with your funder
• the licence is too restrictive
• repository deposit timing fails policy requirements
• APC reimbursement assumptions do not hold

That is why journal metrics explained: impact factor vs SJR vs CiteScore should always be read alongside policy and rights reality, not instead of it.

Do not do this alone if the paper matters.

Good support often comes from:

• your university library or scholarly communications office
• institutional open-access teams
• grant administrators
• repository managers

And on the manuscript side, submission readiness checklist and a Manusights AI Review help with the separate question that policy does not answer: whether the paper is actually ready for the journal you are trying to make compliant.

This is worth stating plainly.

Open access compliance tells you nothing direct about:

• whether the journal is a good scientific fit
• whether the evidence bar is right for your paper
• whether reviewers will think the claims are overstated
• whether the submission is strategically timed well

That is why compliance should be treated as one gate, not the only gate.