If the first author is affiliated to one of the following research centres of the Helmholtz Association, the authors will not be invoiced directly. The Article processing charges will be settled automatically between Copernicus Publications and the Helmholtz Centres. Contact your local library to learn more about the internal procedure at your centre:

- Deutsches Elektronen-Synchrotron – DESY (valid for submissions after 1 May 2012)
- Deutsches Zentrum für Luft- und Raumfahrt – DLR (valid for submissions after 1 November 2012)
- Forschungszentrum Jülich (valid for submissions after 1 January 2012)
- German Research Centre for Geosciences – GFZ (valid for submissions after 1 January 2012)
- Helmholtz Centre for Environmental Research – UFZ (valid for submissions after 1 January 2012)
- Helmholtz Centre for Ocean Research Kiel – GEOMAR (valid for submissions after 1 August 2012)
- Helmholtz Centre for Polar and Marine Research – AWI (valid for submissions after 1 January 2016)
- Helmholtz-Zentrum Dresden-Rossendorf – HZDR (valid for submissions after 1 October 2012)
- Helmholtz-Zentrum Geesthacht – HZG (valid for submissions after 1 January 2013)
- Karlsruhe Institute of Technology – KIT (valid for submissions after 1 May 2012)

The institutional agreement with the Leibniz Association covers papers with article processing charges (APCs) up to €2,000 (gross) if the corresponding author of the paper is affiliated to one of the following Leibniz institutes:

- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB)
- German National Library of Science and Technology (TIB)
- Leibniz Center for Tropical Marine Ecology (ZMT)

The APCs will then be settled directly between Copernicus Publications and the respective Leibniz institute. If APCs exceed €2,000 (gross), Leibniz Association will not cover any of the costs. The arrangement is valid for submissions after 1 September 2016 (receipt of electronic manuscript files).

If the corresponding author (first author until 31 December 2016) is affiliated to one of the research units of the Max Planck Society, the article processing charges for category 1 and 2 papers will be settled automatically between Copernicus Publications and the Max Planck Society, whereas for category 3 and 4 papers only the respective differences to categories 1 or 2 have to be paid by the authors. This arrangement is valid for any submission after 1 January 2008 (receipt of electronic manuscript files).

If the first author is affiliated to one of the institutes of the University of Bremen, the article processing charges for category 1 and 2 papers will be settled automatically between Copernicus Publications and the SUUB (Staats- und Universitätsbibliothek Bremen), whereas for category 3 and 4 papers only the respective differences to categories 1 or 2 have to be paid by the authors. This arrangement is valid for any submission after 1 April 2014 (receipt of electronic manuscript files).

The TU Darmstadt promotes publication of research articles in open-access journals with an open-access publishing fund for its members, which is supported by the German Research Foundation (DFG). The institutional agreement with Technische Universität Darmstadt covers papers with article processing charges up to €2,000 (gross) when the corresponding author of the paper is affiliated to TU Darmstadt. The APCs are then settled directly between Copernicus Publications and the university library of the TU Darmstadt. If APCs exceed €2,000 (gross), the central open-access publishing fund of TU Darmstadt will not cover any of the costs. This arrangement is valid for submissions after 1 January 2017 (receipt of electronic manuscript files). For further information about open access at TU Darmstadt, please visit the library website https://www.ulb.tu-darmstadt.de/oa-fonds or contact oa-fonds@ulb.tu-darmstadt.de.

In 2016, the TU Delft Library will be providing a publication fund for articles published with Copernicus Publications. The fund is available to all corresponding authors affiliated with TU Delft on a first-come, first-served basis. Submitting a manuscript holds out the prospect to the corresponding author that his or her manuscript publication will be settled by the TU Delft prepayment. However, if no funds are available at the time of the publication, Copernicus Publications will charge the authors for the APCs. The TU Delft can always settle the pending amount and then advise Copernicus Publications not to invoice the authors.

The institutional agreement with the SUB (Niedersächsische Staat- und Universitätsbibliothek) covers papers with article processing charges (APCs) up to €2,000 (gross) if the corresponding author of the paper is affiliated to the Georg-August-Universität Göttingen. The APCs will then be settled directly between Copernicus Publications and the SUB. If APCs exceed €2,000 (gross), SUB will cover only half of the costs. The arrangement is valid for submissions after 1 January 2016 (receipt of electronic manuscript files).

The institutional agreement with the TIB (Technische Informationsbibliothek) covers papers with article processing charges (APCs) up to €2,000 (gross) if the corresponding author of the paper is affiliated to the Leibniz Universität Hannover. The APCs will then be settled directly between Copernicus Publications and the TIB. If APCs exceed €2,000 (gross), TIB will not cover any of the costs. The arrangement is valid for submissions after 1 January 2016 (receipt of electronic manuscript files).

The institutional agreement with the Technical University Munich (Technische Universität München, TUM) covers papers with article processing charges up to €2,000 (gross) if the corresponding author of the paper is affiliated to the TUM. The APCs will then be settled directly between Copernicus Publications and the university library of the TUM. If APCs exceed €2,000 (gross), TUM will not cover any of the costs. This arrangement is valid for submissions after 1 January 2015 (receipt of electronic manuscript files).

If the first author is affiliated to the University of Potsdam, the article processing charges for category 1 and 2 papers will be settled automatically between Copernicus Publications and the Potsdam University Library. For category 3 and 4 papers, only the incurred expense differences to categories 1 or 2 have to be paid by the authors directly. This arrangement is valid for any submission after 1 July 2015 (receipt of electronic manuscript files).
Please note: If the author has not submitted an application for the University of Potsdam's open-access publication fund or if the application is not accepted, the author will receive an invoice from the faculty later on.

If the first author is affiliated to one of the institutes of the ETH Zurich, the article processing charges for category 1 and 2 papers will be settled automatically between Copernicus Publications and the ETH-Bibliothek, whereas for category 3 and 4 papers only the respective differences to categories 1 or 2 have to be paid by the authors. This arrangement is valid for any submission after 1 October 2014 (receipt of electronic manuscript files).

The following is a list of universities that are supported by the DFG Programme "Open Access Publizieren" and therefore provide funds for open-access publications. Please check whether your institution supports the costs for open-access publishing.

- Albert-Ludwigs-Universität Freiburg
- Eberhard-Karls-Universität Tübingen
- Freie Universität Berlin
- Friedrich-Alexander-Universität Erlangen-Nürnberg
- Gottfried Wilhelm Leibniz Universität Hannover
- Johannes Gutenberg-Universität Mainz
- Julius-Maximilians-Universität Würzburg
- Justus-Liebig-Universität Gießen
- Otto-Friedrich-Universität Bamberg
- Ruhr Universität Bochum
- Ruprecht-Karls-Universität Heidelberg
- Technische Universität Hamburg Harburg
- TU Chemnitz
- TU Clausthal-Zellerfeld
- TU Dresden
- TU Ilmenau
- Universität Bayreuth
- Universität Bielefeld
- Universität Duisburg-Essen
- Universität Kassel
- Universität Konstanz
- Universität Leipzig
- Universität Regensburg
- Universität Stuttgart
- Westfälische Wilhelms-Universität Münster

The European Commission has launched a pilot to fund open-access publications for finalized FP7 projects through the OpenAIRE project. The post-grant Open Access Pilot will cover article processing charges (APCs) for FP7 projects up to two years after they end, and a maximum of three publications per FP7 project will be funded. To facilitate the funding of eligible manuscripts, OpenAIRE has arranged a prepayment agreement with Copernicus Publications. OpenAIRE's prepaid fund will be charged a maximum of €2,000 fee per manuscript. Where the APCs exceed this amount, the remainder of the payment will be issued to the corresponding author’s institution. Whether or not a manuscript is eligible for funding (up to €2,000 gross per manuscript) and subsequently receives funding via the pilot is decided by OpenAIRE on a case-by-case basis.

Horizon 2020 is the EU Research and Innovation programme. All projects receiving Horizon 2020 funding will have the obligation to make sure any peer-reviewed journal article they publish is openly accessible, free of charge. For projects funded through the Seventh Framework Programme (FP7), publication fees are eligible for reimbursement. Details can be found in the FP7 model Grant Agreement (article II.16.4).

The German Research Foundation DFG supports publication charges with €750 per year. This support can also be accumulated over the 3-year period of funding. Please see the bulletin Merkblatt für Anträge auf Sachbeihilfe. Authors have to apply for this.

The Austrian Science Fund (FWF) is Austria's central funding organization for basic research. The FWF provides grants to cover the costs of peer-reviewed publications that result from projects supported by the FWF, up to a limit of 3 years after conclusion of the project. Leaders and collaborators of all FWF projects of any discipline are the target group of this support.

The Netherlands Organisation for Scientific Research (NWO) covers up to €5,000 publication charges for each NWO-funded research project. Applications have to be made by the project leaders. For further information please visit the NWO website.

The Volkswagen Foundation covers publication costs for funded projects. Please see the bulletin Bewilligungsgrundsätze.