A conference “submission cap” can limit either the length of a paper or the number of papers associated with one author. Exceeding a stated limit can lead to rejection before peer review, but rules differ by venue, year, track, and paper category. Check the current official instructions for the exact submission—not a rule remembered from another conference.
What does “submission cap” mean?
The phrase can refer to two different limits. A paper-length limit restricts the pages or words in one manuscript; an author-count cap restricts how many submissions may list the same person as an author. A venue may have one, both, or neither. The 2026 and 2027 policies below are examples for those cycles, not universal or permanent rules.
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- Paper length: UIST 2026 says papers longer than 5 pages in its short-paper category or 10 pages in its standard-paper category will be desk rejected. ACM Multimedia 2026 allows 6–8 pages, with up to two additional pages for references, and says overlength submissions will be desk-rejected without review. See the UIST 2026 call and ACM Multimedia 2026 guidelines.
- Number of submissions per author: ACM Multimedia 2026 limits each author to 10 submissions across its Technical, Brave New Ideas, and Datasets tracks; later submissions, ordered by submission ID, are desk rejected. SIGMOD 2027 limits an author to 10 Research Track papers across submission rounds, with the 11th and subsequent papers desk rejected. See the SIGMOD 2027 call.
These numbers apply to the named conference cycles and categories. For length rules, verify what counts: references, appendices, figures, tables, and supplementary files may be treated differently. For author caps, check whether papers across tracks or rounds are combined and how coauthorship is counted; do not infer the answer from the cap alone.
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What is a desk rejection?
A desk rejection is a decision made before a paper is assigned to external reviewers. CHI 2026 states: “Desk-rejected submissions will not be assigned to a reviewer, and their authors will receive a brief note about the rejection.” CHI’s review-process page explains this outcome and lists possible grounds.
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Mechanical and policy checks
Examples in the CHI 2026 and ACM Multimedia 2026 instructions include an incomplete submission, a missing or broken PDF, incorrect formatting or excessive length, anonymity violations, work outside the conference’s scope, dual submission or undisclosed closely related work, plagiarism, and author-count-cap violations. The applicable grounds depend on the venue’s rules.
Substantive pre-review checks
Some conferences also screen for whether a paper is sufficiently complete and supported to review. CHI 2026’s assisted desk-reject process identifies concerns such as inadequate literature context, insufficient methodological or research transparency, claims unsupported by data, or a contribution too small for the paper’s length. CHI describes these decisions as collaborative, rather than the result of a single person’s quick read. Its revised process explains the approach.
CHI’s paper instructions also say the main paper must stand on its own: do not put essential material only in an appendix or supplement. An appendix may be allowed, but that does not mean reviewers must use it to supply missing information in the paper.
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How page limits, appendices, and review stages differ
Do not assume the limit for submission is the same as the limit for the accepted, camera-ready paper. SIGMOD 2027 specifies a 12-page research submission limit excluding references and a 13-page camera-ready limit, also excluding references. Its appendix must be a separate PDF, and reviewers are not required to read it. These details are stated in the SIGMOD 2027 call.
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Likewise, an upload portal accepting a file does not establish that the file complies with the rules. If the instructions do not say whether a particular item counts, or whether a cap spans tracks or rounds, ask the conference chairs rather than relying on another venue’s convention.
A practical check before submitting
- Open the current official call and author instructions for the exact conference cycle, track, category, and submission round. Look for updates or corrections.
- Write down each applicable limit separately: pages or words, treatment of references, appendix and supplement rules, file size, and submissions per author. Check how the policy counts coauthored papers, tracks, and rounds.
- Use the required template and inspect the final PDF. Confirm that every page, figure, reference, and required upload is present, legible, and correctly formatted; check file metadata where the instructions require it.
- Check anonymity throughout the submission if the review is double-anonymous. Include the main paper, acknowledgements, video, supplements, repository links, and metadata in the check. Follow the venue’s specific citation rule: UIST 2026, for example, says to cite prior work in the third person while leaving references intact.
- Disclose related or concurrent work when required. CHI 2026 and UIST 2026 require disclosure of specified closely related submissions. SIGMOD 2027 prohibits concurrent review elsewhere during its consideration period. Read the exact policy for definitions and exceptions.
- Make the main paper reviewable on its own. Explain the contribution, describe methods clearly enough to assess them, support claims with evidence, situate the work in relevant literature, and show how it fits the conference’s scope.
- Resolve ambiguity with the chairs before the deadline and keep their answer. Do not treat a successful portal upload as confirmation that a submission meets the rules.
These checks can reduce avoidable compliance problems; they cannot predict the scientific or editorial outcome. Policies may distinguish correctable issues from violations that lead to rejection. SIGMOD 2027, for example, says some anonymity issues detected early may be corrected in a subsequent round, while other violations discovered during review can result in rejection.
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How to compare venues when choosing where to submit
When several conferences are plausible, compare the policies that affect your paper rather than treating submission caps as a ranking:
- Page or word allowance, including what counts toward it and whether submission and camera-ready limits differ.
- Per-author cap, including how tracks, coauthorship, and submission rounds are counted.
- Fit with the conference’s stated scope and expected contribution.
- Review model, including whether a substantive assisted desk-review process exists.
- Anonymity, related-submission, and concurrent-review requirements.
- What supplementary material reviewers may or must consider.
What the published numbers do—and do not—show
CHI’s 2026 author page said the conference expected more than 5,000 submissions. That was an expectation stated as of 2025, not a final count or a desk-rejection statistic. The 10-submission limits at ACM Multimedia 2026 and SIGMOD 2027 are policy caps, not evidence of how many papers were rejected. The official policy pages cited here do not establish a comparable desk-rejection rate across conferences, so submission volume and author caps should not be used to estimate one.
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