Journal profile · ENVIRONMENTAL STUDIES
Impact Assessment and Project Appraisal
ISSN 1461-5517 · eISSN 1471-5465 · Taylor & Francis
Impact Assessment and Project Appraisal: CAS Zone 4 · Sociology (2025 upgraded edition); impact factor 2.51; hybrid open access; APC about USD 3,250; median 135 days to acceptance (85 articles, last 24 months); acceptance rate 21% (journal website); 50 articles in 2025; indexed in SSCI and Scopus.
Scope
Aims, scope and focus
Impact Assessment and Project Appraisal is published by Taylor & Francis and is in Zone 4 of Sociology in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Environmental and Social Impact Assessments, Mining and Resource Management and Evaluation and Performance Assessment, together about 61.6% of its articles. (generated from OpenAlex topic counts and CAS ranking data)
Impact Assessment and Project Appraisal ( IAPA ) is an international refereed journal and is the official publication of the International Association for Impact Assessment ( www.iaia.org). The editors welcome a diverse range of papers, including multi-author and interdisciplinary papers, that focus on the environmental, social, health, sustainability, and/or other assessments of projects, programmes, plans and policies. IAPA is aimed at readers in universities, government and public agencies, consultancies, NGOs and community groups. Published six times a year, IAPA contains a variety of peer-reviewed research articles, letters, and book reviews of recently published titles. IAPA provides a one-source link to the latest ideas in the wide-ranging field of impact assessment. Peer Review Statement: Impact Assessment and Project Appraisal is an international, peer-reviewed journal which publishes original research contributions to scientific knowledge. All manuscript submissions are subject to initial appraisal by the Editors and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. All peer review is double anonymized and submission is online via Editorial Manager.
From the journal's Aims & Scope
Research area (LetPub): ENVIRONMENTAL STUDIES
Main research topics OpenAlex counts of recent articles; shares are approximate
- Environmental and Social Impact AssessmentsEnvironmental Science37.3%
- Mining and Resource ManagementEngineering19.6%
- Evaluation and Performance AssessmentDecision Sciences4.7%
- Sustainable Building Design and AssessmentEngineering4.2%
- Occupational Health and Safety ResearchHealth Professions3.3%
- Hydropower, Displacement, Environmental ImpactSocial Sciences2.7%
- Risk Perception and ManagementSocial Sciences2.5%
- Human auditory perception and evaluationEngineering2.3%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Sociology Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Sociology | Zone 4 |
| Minor | Environmental Studies | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Sociology Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Sociology | Zone 3 |
| Minor | Environmental Studies | Zone 4 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Sociology Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Sociology | Zone 4 |
| Minor | Environmental Studies | Zone 4 |
Top journal: noReview journal: no
JCR / CiteScore quartiles on the journal's website
- CiteScore Q2 · 2025
Publisher-reported: JCR figures are Clarivate's and CiteScore figures Scopus's to confirm; both are a different system from the CAS zones.Publisher website
Database indexing
SSCIScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Indexing the journal's website claims
CAB AbstractsGeoRefPublisher website
Other: ProQuest, OCLC
As the journal's website lists them, not checked against each database; for Web of Science editions the records above apply.
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 2.51LetPub ·
- Impact factor (publisher) 2025
- 2.4Publisher website ·
- 5-year impact factor (publisher) 2025
- 2.5Publisher website ·
- CiteScore 2026-06
- 4.1LetPub ·
- CiteScore (publisher) 2025
- 4.1Publisher website ·
- SJR 2026-06
- 0.61LetPub ·
- SJR (publisher) 2025
- 0.61Publisher website ·
- SNIP 2026-06
- 0.95LetPub ·
- SNIP (publisher) 2025
- 0.95Publisher website ·
- h-index
- 73OpenAlex ·
- i10-index
- 594OpenAlex ·
- 2-year mean citedness
- 2.69OpenAlex ·
- Self-citation rate
- 33.3%LetPub ·
- Share of gold OA articles
- 18.26%LetPub ·
Volume
- Articles per year
- 40LetPub ·
- Downloads per year (publisher)
- 448,000Publisher website ·
Articles by year OpenAlex count · 1,216 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 43 | 17 | 42 |
| 2025 | 50 | 30 | 115 |
| 2024 | 50 | 26 | 228 |
| 2023 | 39 | 30 | 277 |
| 2022 | 58 | 21 | 489 |
| 2021 | 43 | 18 | 509 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with Crossref · to
135 daysMedian, submission to acceptance · P25–P75 103 days – 230 days
- Acceptance to online
- median 13 days (85 articles)
- Submission to online
- median 150 days
- Sample
- 85 articles with submission and acceptance dates (98 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Acceptance rate (publisher)
- 21%Publisher website ·
- Submission to first decision
- 5 daysPublisher website ·
- First decision after review
- 60 daysPublisher website ·
- Acceptance to publication
- 13 daysPublisher website ·
- Peer review
- Double anonymous peer reviewPublisher website
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| Publisher website | USD 3,250 | — | — |
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
Article types accepted3
- editorialEditorialLength not stated
- original researchOriginal researchLength not stated
- reviewReviewLength not stated
Policy excerpts from the journal's websiteOpen access
- Open access Open access
Impact Assessment and Project Appraisal is a hybrid open access journal that is part of the Taylor & Francis Open Select publishing program, giving you the option to publish open access. Publishing open access means that your article will be free to access online immediately on publication, increasing the visibility, readership, and impact of your research. Why choose open access? Increase the dis…
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- Taylor & Francis
- ISSN
- 1461-5517
- Electronic ISSN
- 1471-5465
- Society / sponsor
- International Association for Impact Assessment
- Latest issue on the website
- Volume 44, Issue 4 (2026)
- Official links
- Journal homepage ↗LetPub
- Submission system ↗Publisher website
- Special issues ↗Publisher website
FAQ
Frequently asked questions about Impact Assessment and Project Appraisal
What CAS zone is Impact Assessment and Project Appraisal in?
In the 2025 upgraded edition of the CAS Journal Ranking, Impact Assessment and Project Appraisal is in Zone 4 of Sociology, and in Zone 4 of the minor category Environmental Studies. In the 2026 Xinrui edition it is in Zone 3 of Sociology. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Impact Assessment and Project Appraisal?
The latest impact factor listed by LetPub is 2.51; CiteScore 4.1, h-index 73.
How long does peer review take at Impact Assessment and Project Appraisal?
Based on the dates recorded on 85 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 135 days (interquartile range 103–230 days); the journal's website gives an acceptance rate of 21%. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Impact Assessment and Project Appraisal?
According to LetPub and DOAJ records, Impact Assessment and Project Appraisal is indexed in SSCI and Scopus. The journal's website also lists CAB Abstracts and GeoRef; that list has not been checked against each database.
Is Impact Assessment and Project Appraisal open access, and what is the APC?
Impact Assessment and Project Appraisal is a hybrid journal. For open-access publication: APC about USD 3,250.
Sources and updates
The facts on this page come from LetPub, Publisher website, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .