If you think that your injury is severe enough that it may keep you out of work, you should absolutely report it immediately. By law, workers who are injured on the job have a maximum of 30 days to report an injury if they wish to make a worker’s compensation claim. However, it is always best to report an injury as soon as possible, so you can begin making arrangements to see a doctor for evaluation and move forward with a plan for recovering and returning to work if that is possible.