Guide hub
OSHA 300A guides
Electronic filing, posting, signer review, deadlines, late recovery, and evidence for injury-and-illness records.
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Run my filing checkQuestions this hub answers
- Does this establishment owe electronic Form 300A submission?
- What has to be posted, certified, or kept as proof?
- What should change if the March 2 deadline was missed?
OSHA 300A review packet
- The OSHA 300 Log, any OSHA 301 incident reports, and the annual average employee count
- Total hours worked, establishment address details, executive signer name, and posting location notes
- Prior-year filing receipts, amended-record notes, and the injury-category totals used for Form 300A
Explainers
June 29, 2026 · 4 min read
Who can certify the OSHA 300A annual summary?
OSHA 300A certification is not just a signature box. Here is who can sign, what they are certifying, and what to review before the March 2 filing.
ReadJune 29, 2026 · 4 min read
Which businesses must file OSHA 300A? High-hazard work, in plain English
OSHA 300A electronic filing depends on establishment size and what the site actually does. Here is the practical way to read OSHA's high-hazard list.
ReadJune 29, 2026 · 4 min read
The 100-employee OSHA 300 and 301 case-detail rule: who's affected
Some 100+ employee establishments must submit OSHA 300 and 301 case details, not just the 300A. Here is how to check the rule.
ReadJune 29, 2026 · 8 min read
OSHA 300A filing options: DIY, consultants, filing services, and EHS platforms
A practical comparison of filing OSHA 300A yourself, hiring a consultant, using a focused filing service, or relying on a broader EHS platform.
ReadJune 29, 2026 · 2 min read
Missed the OSHA 300A deadline? What to do next
If March 2 passed and your establishment still has to submit OSHA 300A data, here is the practical recovery checklist: confirm coverage, submit, post, and keep proof.
ReadJune 29, 2026 · 4 min read
Is my establishment partially exempt from OSHA recordkeeping?
Partial exemption from OSHA recordkeeping depends on size, industry, and special reporting duties. Here is the practical check.
ReadJune 29, 2026 · 3 min read
How to calculate your TRIR and DART rates for OSHA 300A
TRIR and DART turn your OSHA 300 log into comparable incident rates. Here are the formulas, which 300A columns to use, and the mistakes to avoid.
ReadJune 25, 2026 · 2 min read
The 2027 OSHA 300A deadline: dates, who must file, and what happens if you miss it
Your OSHA 300A for the prior year is due March 2. Here are the exact dates, who has to file electronically, and what a missed filing actually costs.
ReadJune 17, 2026 · 2 min read
State Plan vs. federal OSHA: how 300A filing differs by state
About half the states run their own OSHA-approved plan, which can change 300A thresholds and deadlines. Here's how to tell which rules apply to you.
ReadMay 30, 2026 · 1 min read
OSHA recordkeeping penalties: what $16,550 per violation really means
The OSHA recordkeeping penalty is up to $16,550 per violation. Here's what counts as a violation, how 'per violation' adds up, and how to avoid it entirely.
ReadMay 4, 2026 · 1 min read
The OSHA 300A posting requirement (Feb 1 – Apr 30): a simple checklist
Filing your 300A electronically doesn't replace posting it. Here's the posting window, where it goes, and a quick checklist to get it right.
ReadApril 24, 2026 · 2 min read
What is the OSHA ITA Non-Responder Enforcement Program?
OSHA actively finds and cites establishments that skip the 300A electronic submission. Here's how the non-responder program works and how to stay off its list.
ReadApril 13, 2026 · 2 min read
Do you have to electronically submit OSHA 300A? The 20–249 and 250+ rules explained
Whether you must e-file OSHA 300A comes down to two numbers and your industry. Here's the rule in plain English, with the thresholds that decide it.
ReadMarch 25, 2026 · 2 min read
OSHA 300, 300A, and 301: what each form is and who signs it
Three OSHA recordkeeping forms, three different jobs. Here's what the 300 log, 300A summary, and 301 incident report each do — and who certifies them.
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