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LTIF: Lost Time Injury Frequency

The LTIF shows how many lost-time accidents occur in relation to the number of hours worked. It lets you compare safety performance between periods and organisations.

Explanation

The LTIF is a safety indicator: the number of lost-time accidents divided by the number of hours worked, converted to an agreed number of hours. Many companies calculate per million hours, others use a smaller number. So always make clear which basis you use.

A lost-time accident is an accident after which the employee cannot work because of injury. From when this counts differs per organisation, sector or client. Fix the definition beforehand, otherwise you cannot compare figures. Clients and safety schemes often ask for it in tenders and reporting.

The LTIF only says something about accidents with lost time, not about near misses or severity. A low LTIF can also be caused by accidents not being reported. Use the indicator alongside others, such as the number of near-miss reports and the progress of inspections and measures.

Example from practice

Suppose a company has two lost-time accidents over 400,000 hours worked. With one million hours as the basis, the LTIF is then 5 (2 divided by 0.4). Next year you compare that result with the new figures.

© 2026 BrydgeOne. General information, not legal or other professional advice. No rights can be derived from this explanation.

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Glossary

See also

IncidentIncidentNear missNear missKPIKey Performance IndicatorSafety Culture LadderSafety Culture LadderVCASafety, Health and Environment Checklist for Contractors

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