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OSHA 300A Summary Helper

The OSHA 300A summary is the year's totals from your 300 Log. This helper adds the columns up, runs the cross-checks that catch the usual mistakes — a case classified twice, a day count that cannot be right, hours that do not fit the headcount — and gives you the three rates those totals produce, with the dates that follow.

Work-related fatalities recorded on the Log for the year.
Cases, not days. One box per case, chosen on the most serious outcome.
Cases with restricted work or transfer and no days away.
Recordable, but with no death, no days away and no restriction — typically medical treatment beyond first aid.
Calendar days across all cases, counted from the day after each injury. A single case may be capped at 180 days.
Calendar days of restricted duty or transfer across all cases.
Every recordable case is classified into exactly one of the six injury and illness types.
Recordable when an audiogram shows a standard threshold shift and a total hearing level of 25 dB or more above audiometric zero in the same ear.
Employees paid in every pay period, added up and divided by the number of pay periods, rounded to the next whole number.
hours
Actual hours worked, overtime included; vacation, sick leave and holidays excluded even when paid.

Rates and totals are calculated only from the numbers you type, so they are only as good as your OSHA 300 Log. This page is not an OSHA form, is not submitted to anyone, and does not decide whether a case is recordable — that follows 29 CFR Part 1904 and, in a State Plan state, your state's own rule. Nothing you type is sent to our servers.

This is not the form

OSHA publishes Form 300A, and it is the only version worth signing: it carries the certification block, the OMB control number and the posting instruction printed at the foot of the page. Download it, with the Log and the 301, from OSHA's recordkeeping page. What this helper does is add up and cross-check the numbers you have taken off your Log, so that what you copy onto the real form is arithmetically sound. Nothing you type is stored or sent anywhere.

What goes in each box

OSHA Form 300A — the totals taken from the 300 Log
BoxTotalCounted in
GTotal number of deathsCases. Each recordable case appears in exactly one of G, H, I or J — the most serious outcome, G being the most serious and J the least.
HTotal number of cases with days away from work
ITotal number of cases with job transfer or restriction
JTotal number of other recordable cases
KTotal number of days away from workDays, added across every case. A single case may be capped at 180.
LTotal number of days of job transfer or restriction
M(1)–M(6)Injuries; skin disorders; respiratory conditions; poisonings; hearing loss; all other illnessesThe same cases again, classified by type — so M(1) to M(6) must total exactly G + H + I + J.
EmploymentAnnual average number of employees, and total hours worked by all employees last yearFrom payroll, or from OSHA's optional worksheet.

Where a category had no cases, write a zero. 1904.32(b)(2) asks for a total in every column, and every establishment covered by Part 1904 completes the summary even if nothing happened all year.

The checks this page runs

  • Types against cases. M(1) + … + M(6) must equal G + H + I + J. A mismatch means a case is missing a type, or one has been counted twice — the single most common error on a finished summary.
  • Days against cases. A case with days away has at least one day in column K; a case with restricted work has at least one day in column L, since a restriction lasting only the day of the injury is not recorded at all (1904.7(b)(4)(iii)).
  • Hours against headcount. Hours worked divided by the annual average number of employees should land near 2,000 for a full-time year. Far below or far above usually means hours paid were entered instead of hours worked, or that the headcount is not the pay-period average.
  • Days against the cap. An average above 180 days per case is a signal to apply 1904.7(b)(3)(vii) rather than a signal to keep counting.

None of this decides whether a case belongs on the Log. That question is answered by 29 CFR 1904.7 — and, in a State Plan state, by a rule that may be stricter.

The recordkeeping calendar

Before February 1

Review the Log so the entries are complete and correct, total every column, and have a company executive certify the summary — an owner, an officer of the corporation, the highest-ranking company official working at the establishment, or that person's supervisor (1904.32(b)(3) and (b)(4)).

February 1 to April 30

Post the summary — the 300A only, never the Log — in a conspicuous place where notices to employees are customarily posted, and keep it posted for the whole three months (1904.32(b)(5) and (b)(6)).

By March 2

Submit the data electronically if 1904.41 applies to your establishment: 300A data from establishments with 250 or more employees in industries that keep records, and from establishments with 20 to 249 employees in the industries OSHA designates; Forms 300 and 301 as well from establishments with 100 or more employees in the designated high-hazard industries. For that count, every individual employed at any time during the year counts as one employee — not the annual average on the form.

For five years after

Keep the Log, the annual summary, the 301 reports and any privacy case list for five years following the end of the calendar year they cover — and update the stored Logs when a case is newly discovered or its classification changes (1904.33).

Who does not have to keep these records

Two partial exemptions. Employers with 10 or fewer employees company-wide at all times during the last calendar year — peak employment across the whole company, not one location — and establishments in the industries OSHA lists as partially exempt. Either way, OSHA or the Bureau of Labor Statistics can require the records in writing, and then you keep them.

Neither exemption touches 29 CFR 1904.39. Every employer reports a work-related fatality within 8 hours, and a work-related in-patient hospitalization, amputation or loss of an eye within 24 hours, by phone to the area office, by calling 1-800-321-OSHA, or through OSHA's online reporting form.

How it's calculated

Total recordable cases
cases = G + H + I + J
Each case is classified once, on its most serious outcome — column G being the most serious and column J the least.
Case-type cross-check
M(1) + M(2) + M(3) + M(4) + M(5) + M(6) must equal G + H + I + J
Every recordable case is also classified into exactly one injury or illness type, so the two totals on the form have to agree. They are the single most common thing to get wrong.
TRIR (total recordable incident rate)
TRIR = ((G + H + I + J) x 200,000) / hours worked
OSHA's formula: (Number of injuries and illnesses X 200,000) / Employee hours worked.
DART rate
DART = ((H + I) x 200,000) / hours worked
Days away, restricted or transferred — the rate OSHA's targeting programs are built on.
Day count rate
day count rate = ((K + L) x 200,000) / hours worked
OSHA's own name for the day-based rate on its incidence rate worksheet.
Hours-per-employee plausibility check
hours per employee = hours worked / annual average number of employees
A full-time year is about 2,000 hours. Well under 1,000 or well over 2,800 usually means hours paid were entered instead of hours worked, or that the average headcount is wrong.

Frequently asked questions

No, and it is not a substitute for it. This page adds up and cross-checks the numbers you have already taken off your 300 Log, so that you can copy correct totals onto the real form. The form itself, with its certification block and its OMB control number, comes from OSHA — download the recordkeeping forms package from osha.gov. Nothing you enter here is stored or sent anywhere.

Four case boxes and two day boxes, then six case-type boxes. G is deaths, H is cases with days away from work, I is cases with job transfer or restriction and J is other recordable cases; each case is counted in exactly one of them, on its most serious outcome. K is the total days away from work and L the total days of job transfer or restriction, added across all cases. M(1) to M(6) split the same cases by type: injuries, skin disorders, respiratory conditions, poisonings, hearing loss and all other illnesses.

Because they describe the same cases twice, from two angles. Every recordable case is classified once by outcome — G, H, I or J — and once by type — M(1) through M(6). If the two totals differ, a case has been left out of one side or counted twice on the other. This helper flags the gap and tells you which way it goes; it is the fastest check there is on a finished summary.

You still complete and post the summary. 1904.32 requires every establishment covered by Part 1904 to complete the summary even if no work-related injuries or illnesses occurred during the year, and to enter a zero rather than leave a box blank. A posted 300A with zeros is a normal, correct document — a blank one is not.

From February 1 to April 30 of the year following the year covered, in a conspicuous place or places where notices to employees are customarily posted — the same board as your other employee notices. A company executive certifies it first: an owner, an officer of the corporation, the highest-ranking company official working at the establishment, or that person's supervisor.

It depends on your size and industry, and the deadline is March 2. Establishments with 250 or more employees in industries that must keep records submit their 300A data; establishments with 20 to 249 employees in the industries OSHA designates also submit their 300A data; and establishments with 100 or more employees in the designated high-hazard industries submit information from Forms 300 and 301 as well. Watch the counting rule: for this purpose every individual employed at any time during the year counts as one employee, which is not the annual average you write on the form.

OSHA publishes an optional worksheet with the forms. For employment, add the number of employees paid in each pay period across the whole year — including pay periods with none — divide by the number of pay periods and round up. For hours, multiply your full-time employees by the annual work hours of a full-time employee, then add overtime and the hours of part-time, temporary and seasonal workers. Hours actually worked, never hours paid: vacation, sick leave and holidays are excluded.

Employers with 10 or fewer employees company-wide at all times during the last calendar year, and establishments in the industries listed as partially exempt, unless OSHA or the Bureau of Labor Statistics asks them in writing for the records. The exemption is company-wide and based on peak employment, not on the size of one location. It also does not touch 1904.39: every employer reports a work-related fatality within 8 hours, and an in-patient hospitalization, amputation or loss of an eye within 24 hours.

Sources & references

Content checked against these sources — last reviewed August 28, 2026.

By — Editorial team of SteelToeTools.com (published by LSEA SAS) Updated v1