Direct comparison
Senior Author vs. Corresponding Author
Senior author signals project leadership via byline position; corresponding author is ICMJE's journal-contact role. Often the same person, but not required.
Side-by-side comparison
| Dimension | Senior author | Corresponding author |
|---|---|---|
| What it defines | A perceived project-leadership role, read from byline position -- most consistently in biomedicine and life sciences | A formally designated operational role: the journal's single point of contact |
| Byline position | Usually the last-listed name in contribution-ranked author lists | Independent of order -- can be first, middle, or last-listed |
| How it is assigned | Emerges by disciplinary convention among the author team; not formally recorded by the journal as a role | Explicitly designated by the author team in the journal's submission system |
| Formal ICMJE criterion? | No -- not a defined term in ICMJE's recommendations | Yes -- ICMJE explicitly defines the role and its responsibilities |
| Core responsibility | Conceived and directed the study, typically secured funding and supervised the work | Handles submission and peer-review correspondence; stays reachable for post-publication queries, data requests, and corrections |
| When the role is active | Throughout the life of the project, from conception onward | From submission through peer review and indefinitely afterward for correspondence |
| Can more than one person hold it? | Yes -- co-senior authorship is a recognized, if informal, convention on some papers | Usually only one can be entered at submission, though some journals permit multiple co-corresponding authors on the published article |
| Typical CRediT roles | Conceptualization, Funding acquisition, Supervision | No dedicated CRediT category -- corresponding status is a submission-process function, not a contribution type |
| Field dependence | Strongest in biomedicine/life sciences; meaningless in alphabetical-order fields (mathematics, economics, parts of physics) | Applies uniformly across nearly all peer-reviewed fields -- every journal needs a designated contact |
| Relationship to first author | Conventionally the counterpart to first author on a two-tier byline | No structural relationship to first-author position |
| Can be the same person as the other? | Yes -- frequently is, especially on small author teams | Yes -- frequently is, but not required |
Common questions
FAQ
Can the senior author and corresponding author be the same person?+
Yes, and on small author teams they usually are. But the two roles are defined independently -- one is a perceived-leadership label read from byline position, the other is ICMJE's formally designated journal-contact role -- so nothing requires the same person to hold both.
Who decides who the corresponding author is?+
The author team decides and designates it during manuscript submission, independent of who holds the senior-author position. A postdoc, a co-PI, a statistician, or any other co-author can be named corresponding author regardless of where they sit in the byline.
Does being corresponding author carry more credit than being senior author?+
Not inherently. Corresponding-author status is an operational, journal-recorded role, not a formal authorship criterion or a CRediT contribution category by itself. Senior-author (last) position is likewise an informal convention rather than a defined credit criterion. Neither substitutes for an explicit CRediT contribution statement.
Why would a team name a postdoc or co-PI as corresponding author instead of the senior author?+
Common reasons include the corresponding author being more fluent in the manuscript's technical detail, being expected to remain reachable at a stable institutional address longer than the senior author, or the project having more than one PI where the group deliberately splits leadership and communication duties across people.
Can a paper have more than one corresponding author?+
Journal submission systems typically allow only one corresponding author to be designated at the point of submission, but several publishers, including PLOS, permit more than one corresponding author to be listed on the published article once accepted. See CASRAI's guide on co-corresponding authors for how this works in practice.
Is the corresponding author more accountable than the other authors under ICMJE?+
Not under ICMJE's own criteria -- its fourth authorship criterion requires every listed author to share accountability for the work's integrity, not just the corresponding author. Some journals layer a separate, narrower requirement on top of that baseline, such as BMJ's or PNAS's named-guarantor requirement, which is often but not necessarily the corresponding or senior author.
Going deeper
