As soon as possible. The sooner you tell your supervisor about your injury, the better. There is no benefit to waiting. The earlier you inform your supervisor about your injury and begin the workers compensation process, the earlier you can receive the compensation that you deserve for your at-work injury.
Compensation for injuries sustained on the job can be claimed, but keep in mind that the process might be complex or your case may be disputed. A single event (e.g., slipping on stairs) or a gradual harm (like carpal tunnel) are both workers’ compensation scenarios. With the latter, you may face challenges as these cases tend to be contested.