Lower-risk gambling limits have been developed, mostly using self-reported data. The aim of this study was to develop similar limits using behavioural tracking data provided by the Norwegian gambling provider, Norsk Tipping. Data came from 35,753 people. The suggested limits were gambling less than 8.7 days per month, spending less than €54, duration less than 72–83 minutes, gambling on less than 3 gambling forms, and wager size of less than €118–140. The limits for young people aged 18 to 25 years were lower. A significant number of people experienced harm even when gambling at levels below the limits. The results showed that people could be at risk of harm at all gambling levels.
