Are Your OSHA 2026 Deadlines Still Living in Spreadsheets and Calendar Reminders?
The March 2 ITA deadline gets the attention, but the real risk is discovering that Form 300A, Form 300, Form 301, severe injury reporting, and establishment coverage checks do not line up when filing season arrives.
Last reviewed: by Jacob Szyszka, Founder & CEO of BasinCheck.
Mar. 2
ITA deadline
Feb-Apr
300A posting
7 days
case entry
Recordkeeping readiness packet
2026 OSHA Deadline Calendar
Jan. 2, 2026
ITA opens
Feb. 1, 2026
300A posting starts
Mar. 2, 2026
Electronic filing deadline
Apr. 30, 2026
300A posting ends
Within 7 days
Recordable case entry
OSHA recordkeeping context for 2026 filing season
Built around OSHA 29 CFR Part 1904, Form 300A posting, and ITA electronic submission rules.
Why this matters now
The 2026 OSHA filing deadline covered 2025 records, but the operational lesson is current: if recordable cases are not classified, certified, and tied to the right establishment before filing season, your team ends up rebuilding the OSHA trail under deadline pressure.
The same page can also capture future-search demand because safety managers search by year, form, vertical, and deadline when they are trying to confirm what their company owes.
The deadline problem is a proof problem.
Most teams know the date. The scramble starts when they have to prove which cases were recordable, which establishment owns them, and whether the submitted data matches the posted annual summary.
Records split across systems
The incident report is in one folder, the supervisor notes are in email, and the year-end log lives in a spreadsheet.
Coverage is unclear
A company may operate across oilfield, construction, trucking, warehousing, and manufacturing categories. ITA filing depends on establishment-level NAICS and headcount.
CSV work happens too late
Teams often discover missing establishment data, case classifications, and Form 301 details during filing week.
Posting is treated as a reminder
Form 300A posting is not just a calendar item. It requires a certified annual summary backed by clean records.
Deadline value
A practical OSHA calendar before filing season turns into a cleanup project.
This page is designed to answer the obvious deadline question, then move the buyer into the harder operational questions: are we covered, are our logs clean, and can we generate submission-ready data without manual reconstruction?
Jan. 2, 2026: ITA opens
Covered establishments can begin submitting calendar year 2025 injury and illness data through OSHA's Injury Tracking Application.
Feb. 1, 2026: 300A posting starts
Post the certified Form 300A annual summary where employees can see it.
Mar. 2, 2026: Electronic filing deadline
Covered establishments submit required Form 300A data, and some submit case-level Form 300/301 data.
Apr. 30, 2026: 300A posting ends
The Form 300A summary must remain posted through April 30, then be retained with OSHA records.
Within 7 days: Recordable case entry
Record each OSHA-recordable injury or illness on Forms 300 and 301 after receiving case information.
8 / 24 hours: Severe injury reporting
Report work-related fatalities within 8 hours and inpatient hospitalization, amputation, or eye loss within 24 hours.
Do not decide electronic filing from the company name alone.
OSHA's ITA rules are establishment-specific. A small headquarters, a field yard, and a fabrication shop can have different facts even under the same business.
250+ employee establishments that must routinely keep OSHA injury and illness records generally submit Form 300A electronically.
20-249 employee establishments in OSHA-designated industries submit Form 300A when industry and size rules apply.
100+ employee establishments in certain designated high-hazard industries may submit Form 300A plus case-level Forms 300 and 301.
All coverage decisions should be checked against OSHA's ITA coverage application, NAICS appendices, and current instructions.
Industry verticals
Same federal dates, different buyer anxieties.
The vertical angle should not invent different OSHA dates. It should help each buyer understand why their records are likely messy and what to verify before submission.
Oil & gas contractors
Check mixed work scopes carefully: support work, construction, trucking, yards, fabrication, and warehousing may not share one simple NAICS answer.
Construction
Construction teams usually need clean establishment records, jobsite incident documentation, and fast Form 300A posting readiness.
Manufacturing
Manufacturing establishments often need stronger case-level data hygiene because many NAICS groups appear in OSHA electronic reporting lists.
Trucking & transportation
Fleet-heavy teams should reconcile OSHA recordkeeping with DOT workflows so one event is not rebuilt from separate logs.
Warehousing
Yards, storage sites, and warehouses need establishment-specific employee counts and injury logs before filing season starts.
Healthcare & care facilities
Hospitals, nursing care, residential care, and some ambulatory settings can trigger electronic reporting duties when thresholds are met.
What this resource should do
Turn deadline search intent into BasinCheck product intent.
The page should rank for deadline searches, then route qualified visitors into the ITA calculator, OSHA 300A guide, safety calendar, or demo request based on urgency.
2026 OSHA dates for Form 300A posting, ITA submission, and severe injury reporting
Industry vertical notes for oil and gas, construction, manufacturing, trucking, warehousing, and healthcare
Coverage prompts for establishment headcount, NAICS, and case-level Form 300/301 submission
Operating plan for cleaning records before the next filing season
OSHA topic cluster
Where to go next based on the job to be done
Use the deadline page as the hub for timing questions, then route readers into the right tool, template, or product page based on what they need to solve.
OSHA compliance software
Product-led page for teams that need incident records, audit trails, and OSHA forms connected.
2026 OSHA 300A filing guide
Narrow deadline page for searchers focused specifically on the March 2 electronic submission.
OSHA 300 log template
Template and guidance for teams still assembling recordkeeping data in spreadsheets.
OSHA ITA coverage calculator
Interactive tool for checking establishment-level electronic submission duties.
Safety compliance calendar
Recurring oilfield safety cadence planner that pairs OSHA dates with field obligations.
Hidden cost of OSHA fines
Commercial bridge content for readers evaluating the operational cost of weak documentation.
Primary OSHA sources
Review these before each filing season. OSHA can update instructions, guidance, and electronic submission details.
2026 OSHA Deadlines FAQ
Practical answers for recordkeeping, posting, and ITA filing.
Stop rebuilding OSHA records during filing season.
BasinCheck keeps incidents, classifications, forms, photos, and corrective actions connected so OSHA reporting does not become a spreadsheet archaeology project.