Injury frequency rates: LTIFR, MTIFR and TRIFR

Insights works out three injury frequency rates from your classified injuries and the hours worked. The Injury rates and hours page shows each site's rates with the sum behind them, the hours, the injuries counted and How we calculate.

The rates

• LTIFR (lost time injury frequency rate) = fatalities and lost time injuries × 1,000,000 ÷ hours worked.
• MTIFR (medical treatment injury frequency rate) = medical treatment injuries × 1,000,000 ÷ hours worked.
• TRIFR (total recordable injury frequency rate) = fatalities, lost time, medical treatment and restricted duty injuries × 1,000,000 ÷ hours worked. Restricted duty is counted by default; an association admin can leave it out.
• Rolling 12 months: each month's rate uses that month and the 11 before it. The headline runs to the end of last month, so this month's hours (often entered late) don't skew it.
• Days lost per LTI (average time lost) = working days or shifts lost ÷ lost time injuries.
• Rates show two decimals. Without hours there's no rate.

The outcomes

• Fatality: the person died. Counted as a lost time injury.
• Lost time injury (LTI): off work for at least one full day or shift after the day of the injury, or a permanent disability.
• Restricted duty injury: back at work on restricted or alternative duties for at least one full day or shift, without a full day or shift off.
• Medical treatment injury (MTI): treated by, or on the orders of, a doctor (beyond first aid), with no day off and no restricted duties.
• First aid injury and No treatment needed: recorded, but not in any rate.

How to read the page

1. 1Step 1: Open Insights, then the Injury rates and hours tab.
2. 2Step 2: Read Rates · 12 months to the end of <month>: the total first, then each site, with the sum under each rate.
3. 3Step 3: Check Injuries · 12 months. A warning lists any injury that isn't classified yet: choose its number to classify it.
4. 4Step 4: Scroll to How we calculate for the definitions and Where the definitions come from, each marked as read on the source or not.

Settings (association admins)

• Work out a site's hours from the gate's time on site when none are entered: off by default. See Record hours worked.
• Count restricted duty injuries in TRIFR: on by default. Many companies and regulators count restricted duty; the Federal Safety Commissioner's figures leave it out.

Choose Save settings. The rates change straight away, everywhere they show (the dashboard, the report and the feed).

Common questions

• Two people were hurt in one incident. How do I count them? Report each person's injury as its own incident. Each incident counts once, at its outcome.
• Why is a rate blank? There are no hours for that site and period. Enter or import them.
• Which standard is this? The definitions follow AS 1885.1-1990, which has been superseded by AS/NZS ISO 45004:2024. Some definitions couldn't be confirmed on an authoritative page; the page marks each one. Check with your own adviser or regulator before you rely on a definition.