Does MSHA training expire?

In short, yes. To remain compliant, you must take an Annual Refresher training course every year. Annual training lasts until one year from the end of the month you received the training. So, if you received training on June 10, 2023, your MSHA training would expire on June 30, 2024. However, it is best to not delay your annual training to the last minute, since working after your training has expired can result in severe fines, penalties, and even the shutdown of the mine site.