Rule of 8’s (8-minute Rule) – Billing

Photo by Icons8 team on Unsplash
8 minutes1 unit
23 minutes2 units
38 minutes3 units
53 minutes4 units
68 minutes5 units
83 minutes6 units

Check with your facility for specifics.

  • Although called the rule of 8’s, your facility may require a minimum amount of treatment time to be billable for 1 unit. For example, my facility requires at least 15 minutes of treatment for 1 unit.
  • 1 evaluation = 3 units


  • Use your watch’s stopwatch to time each session then write it down on your scratch paper.
Jeff is a licensed occupational therapist and lead content creator for OT Dude. He covers all things occupational therapy as well as other topics including healthcare, wellness, mental health, technology, science, culture, sociology, philosophy, and more.