Sports officiating is not an extremely lucrative hobby but you will see a positive cash flow. Unlike other hobbies the time spent officiating will put some money in your pocket.
My first referee instructor used to say If you are in this just for the money, you’re in the wrong job. I believed this then, and I still believe this today. For 99% of us, being a referee or umpire is not our primary means of employment. However, for a part-time job, the rate of pay is more than acceptable. And when you consider all of the benefits listed above, for the ex-athlete, becoming a referee is as rewarding an avocation as you will find.