Stay on top of upcoming deadlines and events in 2026, by subscribing to IMWCA’s Key Dates Calendar. The calendar includes OSHA reporting deadlines, renewal and audit timelines, and relevant training.
If you are subscribed to IMWCA’s Key Dates Calendar, you do not need to re-subscribe, as the dates will automatically add to your existing calendar.
Click the appropriate calendar to subscribe:
City Calendar:
Google City Key Dates Calendar | iCal Key Date Calendar
County Calendar:
Google County Key Dates Calendar | iCal Key Dates Calendar
28E Calendar:
Google City Key Dates Calendar | iCal Key Dates Calendar
Dates included on the calendar:
Annual OSHA Posting
OSHA 300A Form annual summary must be posted by February 1, 2026.
OSHA Reporting
Employers must submit calendar year 2025 form 300A electronically by March 2, 2026.
IMWCA University
April 8-9, 2026 | Johnston
Iowa State Association of Counties Annual Conference (County Calendar Only)
Spring Conference, March 12-13, 2026 | Des Moines
Annual Conference, August 19-21, 2026 | Des Moines
Iowa League of Cities Annual Conference & Exhibit (City Calendar Only)
September 23-25 | Bettendorf
Renewal Timeline
Mid February | Payroll worksheet available to members and agents for completion online.
March 31 | Deadline for renewal changes. Changes after the deadline will be picked up
at audit.
Mid May | Premium invoices and renewed policies available online.
July 1 | FY 2026-2027 Policy Period Begins.
Audit Timeline
June | Audit preparation letter emailed to all members.
July | Information Providers Inc scheduling letter mailed to all members.
August-October | Completed audits will be posted on the member portal.
November | Invoice or overpayment checks mailed to members, assuming all other deadlines are met.
