ICASSP 2027 runs 16–21 May 2027 in Toronto, Canada, and the full paper deadline is 23 September 2026 — extended from the original 16 September. The theme is “Transforming signals – Enriching Perception.” The organisers have said plainly that no further extension should be expected, because the review schedule is compact and they are anticipating a large number of submissions.
Last updated 23 September 2026. Dates below are from the official call for papers; always confirm against the conference site before you rely on one.
Every important date
| Full paper submission | 23 September 2026 |
|---|---|
| Published journal papers & letters due | 6 January 2027 |
| Acceptance notification | 13 January 2027 |
| Final (camera-ready) paper | 27 January 2027 |
| Author registration | 10 February 2027 |
| Open preview starts | 16 April 2027 |
| Conference | 16–21 May 2027, Toronto, Canada |
Author registration on 10 February 2027 is a hard requirement, not an administrative nicety. If nobody registers against an accepted paper by that date, it does not go into the proceedings. Every year a handful of accepted papers are withdrawn this way, usually because the author moved institutions between January and February and the funding question was not settled in time.
What is the ICASSP acceptance rate?
This is the single most-asked question about ICASSP, and the honest answer is that it is much higher than people expect coming from the general ML conferences.
ICASSP has historically landed somewhere in the 45–50% band. Across the long run of editions the average sits close to 49%, and recent years have run slightly below that, in the mid-40s. The conference does not always publish a precise figure promptly, and per-track rates vary, so treat any single number you see quoted as approximate.
What that means practically: a competent, complete paper with a real result and a clean evaluation has a genuinely good chance. ICASSP is not a lottery in the way NeurIPS has become. It is closer to a well-attended journal with a deadline — the bar is soundness rather than novelty theatre.
Is ICASSP a tier 1 conference?
It depends who is asking, and this trips up a lot of people moving between communities.
Within signal processing and speech, yes. ICASSP is the IEEE Signal Processing Society's flagship and the largest technical conference in the field. An ICASSP paper is a normal, respectable unit of output for a speech researcher, and hiring managers in speech read it as such.
Within the broader ML community, it is not read the same way as NeurIPS, ICML or ICLR. Those venues have single-digit-to-low-20s acceptance rates and a prestige economy built on scarcity. ICASSP does not, by design.
Neither framing is wrong, they are just different cultures. The failure mode is applying one community's calibration to the other — either dismissing ICASSP because the acceptance rate is high, or presenting an ICASSP paper to a general ML audience as though it carried NeurIPS weight. In speech hiring specifically, what people actually look at is whether the work is good and whether you can talk about it, not the venue's rejection rate.
ICASSP vs Interspeech: which should you submit to?
| ICASSP 2027 | Interspeech 2027 | |
|---|---|---|
| Run by | IEEE Signal Processing Society | ISCA |
| Deadline | 23 September 2026 | 9 February 2027 |
| Conference | 16–21 May 2027, Toronto | 29 Aug – 2 Sep 2027, São Paulo |
| Scope | All signal processing; speech is one track among many | Speech and spoken language only |
| Fits work that is | Signal-processing or systems flavoured — enhancement, codecs, front-ends, efficiency | Speech-science or linguistics flavoured — phonetics, prosody, multilingual, corpora |
The practical scheduling point: the two deadlines are roughly five months apart, so most groups treat them as successive shots rather than a choice. Work that misses September goes to February. If you are deciding right now, the question is which audience you want in the room, not which is more prestigious.
The OJSP track
ICASSP runs a track through the IEEE Open Journal of Signal Processing, with a longer 8+1 page format, for work that needs more room than a standard conference paper allows. Worth knowing about if your contribution is being squeezed unreasonably by the page limit — it is a different submission route with its own timeline, so check the call before assuming it shares the main deadline.
Proceedings are freely accessible on IEEE Xplore from 30 days before the conference through its conclusion, which is also the window in which to grab anything you want to read without a subscription.
Bottom line
ICASSP 2027 is in Toronto, 16–21 May 2027. The paper deadline is 23 September 2026 with no further extension expected, notification is 13 January 2027, and author registration closes 10 February 2027. Acceptance historically sits around 45–50%, which is high by general-ML standards and normal for the field. If you miss it, Interspeech 2027 has a 9 February 2027 deadline.