A gas bill typically includes several key components: the service charge, usage charge, and government charges. The service charge is a fixed fee for having gas connected and available, while the usage charge reflects the amount of gas consumed, measured in megajoules or gigajoules. Government fees and taxes may also apply, depending on your location. To understand your specific charges and any discounts or concessions you might be eligible for, it's best to check your bill closely and consult with your gas retailer or visit energy.gov.au for more information.