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SIOP, the Society for Industrial and Organizational Psychology, is the professional association for industrial-organizational (I-O) psychology. This guide sets out what it is, who can join under each membership category, what the annual dues are, and how its July-to-June membership year affects when you pay. Note the name collision: siop-online.org belongs to a different organization (the pediatric oncology society), not to I-O psychology. All SIOP facts below are as described on the official pages at siop.org on 2026-11-08, and they can change.
What it is and who runs it
SIOP describes itself as “the premier professional association for the science and practice of I-O psychology.” It is led by an Executive Board and has its office in Toledo, Ohio. It is a membership society, not a funder: it does not run a grant program, so this page covers membership rather than funding.
SIOP represents Division 14 of the American Psychological Association and is an affiliate of the Association for Psychological Science. For how the APA division system is organized, see our guide to APA divisions; for the wider field, see what psychology is.
Membership eligibility
Per SIOP’s membership criteria page, eligibility depends on category:
| Category | Eligibility as stated by SIOP |
|---|---|
| Member | An I-O psychology doctoral degree and work in the field |
| Associate | A psychology Master’s degree and work in the field |
| Student | Enrolled in a post-secondary program and interested in the I-O field |
| Affiliate | An interest in I-O science (no degree requirement stated) |
SIOP’s About page groups these as Professional (Associate or Member), Student and Affiliate. The dues page also lists Fellow and Retired.
What membership provides
The About page lists the society’s publications and events: the journal Industrial and Organizational Psychology: Perspectives on Science and Practice (IOP), a book series, the quarterly newsletter TIP (The Industrial-Organizational Psychologist), the Washington InfO publication, and an Annual Conference. Which benefits attach to which category is set by SIOP; check the membership pages before joining.
How much does SIOP membership cost?
| Category | Annual dues |
|---|---|
| Professional (Associate, Member, Fellow) | $199 |
| Affiliate | $80 |
| Student and Retired | $59 |
These are the figures on SIOP’s dues page on 2026-11-08.
How to join and renew
- Pick the category that matches your degree and work status using the eligibility table above.
- Apply and pay through SIOP’s membership pages.
- Renew yearly. Dues are not renewed automatically; renewal notices are sent each March and are expected to be paid by June 30. Dues not paid by June 30 result in a deactivated membership.
Timeline phases: the July-June membership year
Dues follow SIOP’s fiscal year, July 1 through June 30, and are not prorated. The timing of payment matters:
- Paying July 1 through February 28 (29 in a leap year): the payment counts toward the current membership year and is due again before June 30.
- Paying March 1 through June 30: the payment covers the remaining months of the current year and the next membership year.
Common mistakes
- Paying in spring and assuming a lapse is coming: a March-to-June payment also covers the next membership year.
- Paying early in the fiscal year and expecting a full 12 months: because dues are not prorated, a payment between July and February is due again before June 30.
- Waiting for an automatic renewal: there is none, and unpaid dues by June 30 deactivate the membership.
- Choosing a professional category without the qualifying degree: Member and Associate are defined by doctoral and Master’s degrees plus work in the field; Affiliate is the interest-based category.
- Landing on siop-online.org, which is the pediatric oncology society, instead of siop.org.
Related organizations
| Body | Relationship to SIOP, per SIOP’s About page |
|---|---|
| American Psychological Association, Division 14 | SIOP represents Division 14 |
| Association for Psychological Science | SIOP is an affiliate |
FAQ
What does SIOP stand for?
Society for Industrial and Organizational Psychology.
Is SIOP the same as APA Division 14?
SIOP says it represents Division 14 of the American Psychological Association; it is its own society with its own membership and dues.
Can I join without a doctorate?
Yes. SIOP lists Associate (psychology Master’s degree and work in the field), Student, and Affiliate categories.
Does SIOP fund research grants?
This page documents no grant program; the sources describe SIOP as a professional association.
Does membership renew automatically?
No. SIOP states dues are not renewed automatically.
Sources
- SIOP, About SIOP: https://www.siop.org/about-siop/ (read 2026-11-08)
- SIOP, Membership criteria: https://www.siop.org/Membership/Criteria (read 2026-11-08)
- SIOP, Membership dues: https://www.siop.org/Membership/Dues (read 2026-11-08)
