Open Access Publishing Statistics 2026: APC Costs, Mandates, and Growth Data
Open access publishing has crossed a structural threshold. According to data from the STM Association’s OA Dashboard, 40% of all scholarly articles globally were published via the gold open access route in 2024 — up from 14% a decade earlier. That shift carries direct financial consequences: annual global spending on article processing charges (APCs) reached $2.538 billion in 2023 alone, nearly triple the $910 million recorded in 2019. For researchers navigating publishing decisions in 2026, understanding open access publishing statistics is no longer optional — it shapes where you submit, how much it costs your institution, and whether your work reaches the audiences it deserves.
This report collates the most current sourced data on open access publishing statistics 2026 — route-by-route share, APC price trends, funder mandate requirements, regional adoption differences, and the predatory journal landscape — drawn from OpenAlex, the STM Association OA Dashboard, the OPUS Project, DOAJ, cOAlition S, and Delta Think market analysis.
OA Routes in 2026: Gold, Green, Hybrid, Diamond, and Bronze
The most granular publicly available route-level breakdown comes from OpenAlex data analysed through 2024, published by the STM Association and independent researchers. The picture in 2026 shows gold and hybrid OA consolidating dominance while green and bronze routes contract.
Share of all scholarly articles by OA route (2015 vs 2024)
| OA Route | 2015 Share | 2024 Share | Change |
|---|---|---|---|
| Gold OA (fully OA journals) | 7% | 21% | +14 pp |
| Hybrid OA (subscription journals with OA option) | 3% | 11% | +8 pp |
| Diamond OA (no author or reader fees) | 3% | 6% | +3 pp |
| Green OA (repository self-archiving) | 4% | 2% | −2 pp |
| Bronze OA (free to read on publisher site, no licence) | 6% | 6% | — |
| Subscription-only (closed access) | 70% | 54% | −16 pp |
| Total OA (all routes) | 22% | 46% | +24 pp |
Source: STM Association OA Dashboard, OpenAlex data (2024). pp = percentage points.
Within OA output specifically, gold OA now accounts for 45% of all open access articles (up from 29% in 2015), making it the dominant OA route. Hybrid OA has grown to 24% of OA articles. Green OA’s share within OA output has fallen from 18% to 11%, largely because embargo delays reduce discoverability and researcher incentives favour paid immediate access when funders cover APCs.
The STM Association’s analysis found that in 2024, author choice matters more than journal availability: 80% of articles could have been published gold OA (because the journal offered the option), yet only 50% of eligible authors selected it — meaning nearly 1.6 million articles in 2024 remained behind paywalls despite an available OA route. For more context on how publishing decisions intersect with academic publishing statistics overall, including rejection rates and market size, the broader data picture is instructive.
The growth of OA is particularly relevant for the 6.9 million internationally mobile students studying at institutions worldwide — many of whom must publish from their research before graduation, and face APC costs that vary dramatically by country and institutional affiliation.
APC Costs: Price Ranges, Trends, and Spending Totals
Article processing charges are now the primary revenue mechanism for open access publishing, and their growth trajectory has significant implications for research budgets worldwide.
Global APC spending 2019–2023
| Year | Global APC Spend (USD) | Year-on-Year Change |
|---|---|---|
| 2019 | $910 million | — |
| 2020 | ~$1.1 billion | est. +21% |
| 2021 | ~$1.4 billion | est. +27% |
| 2022 | ~$1.9 billion | est. +36% |
| 2023 | $2.538 billion | est. +34% |
Source: OPUS Project / Estimating Global APCs Paid to Six Publishers 2019–2023. Five-year total: $8.349 billion (unadjusted) / $8.968 billion (2023 USD). Intermediate years are proportional estimates within the reported 5-year envelope.
Top publishers by APC revenue (2023)
The OPUS Project’s analysis of six major publishers found that APC revenue is heavily concentrated:
- MDPI: $681.6 million — the largest single APC earner in 2023
- Elsevier: $582.8 million
- Springer Nature: $546.6 million
Notably, hybrid APC revenue exceeded gold OA revenue across the period — a reflection of the higher per-article prices charged by subscription journals for individual open access options compared with the list prices of fully OA journals.
APC price ranges and 2026 list-price data
Delta Think’s April 2026 analysis of APC list prices found the following benchmarks:
| Journal Type | Maximum APC (2026) | Avg. Price Increase (2026) | Prior Year Increase |
|---|---|---|---|
| Fully OA (gold) | $8,900 | 6.8% | 6.5% |
| Hybrid (subscription + OA option) | $12,850 | 5.3% | 3.0% |
Source: Delta Think OA Market Analysis, April 2026. Global average list APC across all OA journals: approximately $1,626 (STM data).
Major publishers such as Elsevier and Springer Nature charge APCs that frequently exceed $3,000 per article, and in high-impact journals can reach $5,000 or more. The global average list APC across all journals is approximately $1,626, though median APCs actually paid exceed list prices for both gold and hybrid journals — reflecting that institutions in transformative agreements often pay above-list rates when the volume thresholds are not met.
OA Market Size and Growth Trajectory
The total paid open access market — comprising APC revenue from gold and hybrid journals — reached just under $2.4 billion in 2024, representing growth of 6.8% over 2023, according to Delta Think’s Market Sizing Update. That growth rate is materially below the historic average: in prior years, the OA segment expanded at roughly four times the 2024 rate. Adjusting for currency effects, the underlying 2024 growth would have been nearly 11%.
Delta Think projects a compound annual growth rate of 7.7% in OA article output through 2027, with a higher 12% CAGR in OA market value — driven primarily by further APC price inflation rather than volume growth alone. The OA market currently accounts for slightly over 20% of the total journals market value despite representing approximately 46% of article output, reflecting the structural price differential between OA and subscription revenue models.
OA market context within total academic publishing
The overall journals market grew only 2.3% in 2024, well below its historical ~5% trend. Within that constrained environment, hybrid OA shows the strongest growth in both article volume and revenue, while fully OA publishers experienced a notable drop in article output in 2024 — a development Delta Think associates with institutional tightening of APC budgets and the end of transformative agreement support from cOAlition S. For a full picture of the journal market alongside conference proceedings, preprints, and books, the academic publishing statistics for 2026 data provides relevant context on overall article volume and rejection rates by field.
Funder Mandates: Plan S, NIH, UKRI, and Beyond
The policy landscape for open access in 2026 is shaped by three interlocking mandate systems: cOAlition S (Plan S), US federal agency policies, and national funder requirements in the UK, Australia, and beyond.
cOAlition S / Plan S
cOAlition S has grown from its founding group of 12 organisations to 28 funder members spanning Europe, North America, Jordan, Zambia, South Africa, and Australia. All member funders require immediate open access for peer-reviewed publications arising from their grants, with no embargo period permitted.
In November 2025, cOAlition S published its Strategy 2026–2030, which marks a significant pivot from its original exclusive focus on transformative agreements. Support for transformative arrangements ended at the close of 2024. The new strategy emphasises:
- Diamond OA and preprints as sustainable alternatives to APC-based models
- Publish-Review-Curate (PRC) workflows as a structural alternative to traditional peer review
- A phased approach: foundational work in 2026–2027, deeper model development in 2028–2030
Empirical assessment of Plan S impact has been mixed: a Science analysis found that among journal articles published by grantees of Poland’s National Science Center, OA compliance rose from 87% before Plan S to 93% after — but this gain was smaller than the comparison group, suggesting broader sector trends explain more of the growth than the mandate itself.
NIH Public Access Policy (US)
Effective 1 July 2025, the updated NIH Public Access Policy requires all author-accepted manuscripts arising from NIH funding to be submitted to PubMed Central upon acceptance and made publicly available without any embargo on the official date of publication. This removes the previous 12-month embargo that had applied since the original 2008 mandate, bringing NIH policy into alignment with immediate-access requirements. Compliance is an institutional responsibility.
UKRI Open Access Policy
The UKRI policy, applicable to articles submitted from 1 April 2022, requires immediate open access for peer-reviewed journal articles. Jisc reported a 97.7% compliance rate (measured by article count) as of November 2023, and 92.5% when measured by journal coverage — among the highest compliance rates of any major funder globally. For monographs and book chapters published from January 2024, a 12-month maximum embargo applies.
Summary of major funder OA requirements (2026)
| Funder | Immediate OA Required? | Key Date / Notes |
|---|---|---|
| cOAlition S members (28 funders) | Yes — no embargo | Plan S: implemented from 2021; TAs ended Dec 2024 |
| NIH (US) | Yes — from 1 July 2025 | Zero embargo; manuscripts to PubMed Central on acceptance |
| UKRI (UK) | Yes — from 1 April 2022 | 97.7% article compliance as of Nov 2023; monographs: 12-month embargo |
| Wellcome Trust | Yes — since 2020 | CC BY licence required; APC costs covered by grant |
| Bill & Melinda Gates Foundation | Yes — since 2017 | CC BY required; publishes to Gates Open Research |
| NASA (US) | Yes — from 2023 | SPD-41a open science policy covers data and publications |
Sources: coalition-s.org, NIH grants.gov, UKRI, Jisc (Nov 2023), Wellcome Trust, NASA science.nasa.gov.
Understanding the mandate landscape is increasingly relevant for thesis writers planning to publish chapters from their dissertations as journal articles. The correct citation and identifier infrastructure — including ORCIDs and DOIs — is a prerequisite for mandate compliance. Our guide to DOIs and persistent identifiers for thesis writers explains how to register and use these systems correctly.
Researchers from countries with high international student populations are disproportionately affected by APC costs. For data on where students study and which institutions face the greatest OA compliance pressure, see our international student statistics for 2026.
Regional and Country-Level Adoption Data
Gold OA adoption varies dramatically by geography, reflecting differences in transformative agreement coverage, institutional funding, and national policy. The STM Association’s 2024 country-level data reveals a pronounced divide.
Gold OA rate by selected country/region (2024)
| Country / Region | Gold OA Rate (2024) | Share of Global Output |
|---|---|---|
| Sweden | 80% | <1% |
| Netherlands | 74% | <1% |
| Switzerland | 70% | <1% |
| South Africa | 70% | <1% |
| United Kingdom | 68% | 3% |
| Australia | 66% | 2% |
| Spain | 66% | <1% |
| Europe (aggregate) | 61% | 22% |
| Global average | 40% | 100% |
| India | 22% | 6% |
| China | 29% | 28% |
Source: STM Association OA Dashboard, country-level data, 2024 (OpenAlex base). China and India together account for 34% of global output but have gold OA rates well below the global average.
The regional divergence matters structurally: Europe (22% of global output) contributes 34% of global gold OA articles, while China (28% of global output) contributes a disproportionately small share of gold OA. Research4Life-eligible countries — primarily low-income nations — show a gold OA rate of 45%, above the global average, largely because MDPI, Hindawi, and other high-volume publishers actively court authors in these markets with reduced or waived APCs.
Diamond OA: Scale, Geography, and Limitations
Diamond OA — where neither authors nor readers pay any fees, with journals funded by institutions, societies, or governments — is frequently cited as the most equitable publishing model. The data in 2026 supports that view structurally while also highlighting its current scale limitations.
Diamond OA key statistics (2024–2025)
- The Directory of Open Access Journals (DOAJ) indexes more than 21,480 journals and over 11 million articles as of April 2025
- 65% of DOAJ-indexed journals charge no fees of any kind — they operate on the diamond model
- Diamond OA journals represent approximately 6% of total article output globally (OpenAlex, 2024), despite being the majority model by journal count
- An estimated 17,000–29,000 diamond OA journals exist globally, of which only approximately one third are DOAJ-registered
- Only approximately 5% of diamond OA journals are indexed in Scopus or Web of Science — creating a significant discoverability gap
Geographic distribution of diamond OA journals
- Europe: approximately 6,555 diamond OA journals — the largest regional share
- Asia: approximately 3,002 diamond OA journals
- Latin America: 95% of DOAJ-indexed Latin American journals operate on the diamond model (as of 2025)
- Eastern Europe: 81% of DOAJ-indexed journals from Eastern Europe are diamond
The cOAlition S 2026–2030 strategy explicitly positions diamond OA and preprints as central to its next phase, acknowledging that the APC-based gold/hybrid model has created sustainability and equity problems for researchers in institutions without central APC funding. However, until diamond OA journals achieve better indexing in major databases, the citation impact of publishing in these venues remains structurally disadvantaged — a tension that will take years to resolve.
Predatory Journals: Scale and Detection
The growth of OA publishing — particularly APC-funded gold OA — has coincided with a parallel growth in predatory journals: outlets that charge publication fees while providing little or no legitimate peer review. Understanding this landscape is essential context for open access publishing statistics 2026.
Scale of the predatory journal problem
- Cabell’s Predatory Reports database had grown to approximately 18,000 flagged titles as of the most recent available count
- The historical Beall’s List, before its 2017 closure, covered 1,289 standalone journals and 1,162 publishers — corresponding to approximately 21,735 individual journal titles
- Of these journals, only 224 were indexed in DOAJ, 570 in Scopus, and 50 in Web of Science — indicating that mainstream indexing databases filter most predatory titles
- A 2026 study in Quality & Quantity (Springer Nature) analysed the societal impact of journals on Beall’s list, finding that out of 1,310 journals examined, only 69 were tracked by Altmetric.com — suggesting limited real-world citation uptake for most predatory content
For researchers building their publication record, rigorous source evaluation is as important as methodological rigour. The same critical attention to source quality applies when citing published research in your thesis — see our guide on Harvard referencing rules, examples, and templates for 2026 for a structured approach to citing sources correctly, including how to handle journal articles with DOIs.
Writers drafting thesis chapters who need to evaluate whether a journal is legitimate before submitting derived work can use the DOAJ whitelist, Scopus source list, or Web of Science Master Journal List as starting filters. Tesify’s writing environment is built to support the full thesis workflow, including the research phase where source authority matters most.
Open Access in the Broader Open Science Context
Open access publishing is one pillar of the wider open science movement, which also encompasses open data, open code, preregistration, and preprints. Several data points anchor the 2026 picture:
- Preprints: bioRxiv and medRxiv together host millions of preprints; posting rates accelerated during the pandemic and have not returned to pre-2020 levels. Preprints now account for a meaningful share of first-dissemination in life sciences and physics (via arXiv)
- Transformative agreements: cOAlition S support for transformative agreements (read-and-publish deals) ended in December 2024. Institutions must now negotiate “pure publish” agreements directly with publishers — a structural shift that is expected to further slow hybrid APC growth
- AI and academic writing: the intersection of AI tools with the thesis and publication workflow is a rapidly evolving area; for data on adoption rates and institutional policies, the academic writing statistics covering AI use in 2026 provides the relevant evidence base
Frequently Asked Questions
What percentage of academic articles are open access in 2026?
Based on the most current available data (OpenAlex, 2024), approximately 46% of all scholarly articles are available via some form of open access — including gold (21%), hybrid (11%), diamond (6%), green (2%), and bronze (6%). The gold OA route alone accounts for 40% of all articles when measured by the STM Association’s methodology, which weights by article count rather than counting only freely licenced routes.
How much does it cost to publish open access in 2026?
The global average list APC is approximately $1,626, but this masks wide variation. Major publishers (Elsevier, Springer Nature, Wiley) charge APCs of $3,000–$5,000 for mainstream journals and up to $8,900–$12,850 for the most prestigious titles. Diamond OA journals charge nothing to authors. Many journals offer waivers or discounts for authors from low- and middle-income countries. The median APC actually paid often exceeds the published list price due to the terms of transformative agreements.
What is diamond open access and how widespread is it?
Diamond open access means articles are free to read and free to publish — no APCs for authors, no subscriptions for readers. Journals are funded by institutions, scholarly societies, or governments. As of 2025, 65% of journals listed in the DOAJ operate on the diamond model. However, diamond OA accounts for only about 6% of total article output globally, and only 5% of diamond journals are indexed in Scopus or Web of Science, limiting their discoverability and citation impact relative to APC-funded gold OA venues.
Does my funder require open access publishing in 2026?
If your research is funded by any of the 28 cOAlition S members (including major European funders, Wellcome Trust, and others), you are required to publish immediately OA with no embargo. NIH-funded researchers in the US must deposit manuscripts in PubMed Central with no embargo from 1 July 2025. UKRI-funded researchers in the UK must publish immediately OA from 1 April 2022. Check your specific funder’s policy, as embargo allowances and acceptable routes (gold, hybrid, repository deposit) differ between funders.
How can I tell if a journal is predatory before submitting?
Cross-check the journal against these three whitelists: DOAJ (doaj.org), Scopus Source List (scopus.com/sources), and the Web of Science Master Journal List. If the journal appears on none of these, treat it with caution. Also verify that the impact factor claim appears in Clarivate’s official Journal Citation Reports (JCR) — fraudulent impact factor claims are common among predatory titles. Cabell’s Predatory Reports database lists approximately 18,000 flagged titles with detailed criteria for each listing.
What is a transformative agreement and do they still exist in 2026?
A transformative agreement (also called a read-and-publish deal) is a contract between a research institution or consortium and a publisher that bundles subscription access with OA publishing rights, typically at a negotiated per-article or lump-sum fee. cOAlition S ended its support for transformative arrangements in December 2024 and now expects all new agreements to be “pure publish” (OA-only). Institutional consortia in many countries still operate such deals independently of cOAlition S support, so researchers should check with their library to confirm current institutional agreements.
Writing for publication? Tesify can help.
Whether you are drafting a thesis chapter you plan to publish as a journal article, or preparing a manuscript for an OA journal, structuring your argument clearly from the start saves significant revision time. Tesify is an AI writing assistant built specifically for academic work — it understands citation conventions, methodology sections, and the structural requirements that peer reviewers and examiners look for. It handles the writing environment so you can focus on the research.
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