I’m often asked this question. The most reasonable reply is ‘it depends’.
My practice is to get involved in settlement discussions only when my clients have reached ‘maximum medical improvement’ (MMI). This will be when your treatment providers (and you) are satisfied that you are stable and will not benefit (improve) with further treatment. In other words, you must be stable, and your treatment providers must be able to provide a medical ‘prognosis’ for your health/injuries into the future – typically health professionals will not be able to give a prognosis until you have reached MMI.
Once you have reached MMI, I like to have clients wait another 3 months, just to be sure that you are stable. My experience is that the three months’ buffer allows clients to have another season to go through and potentially do different activities that may or may not show up problems with their injuries.