That’s right; the Goods and Services Tax (GST) is included in 1st Energy’s electricity and gas prices. This means that the amount you pay for your energy usage will already include the GST component, which is shown as a separate item on your bill. For residential customers of 1st Energy, the displayed gas plan rates will include GST. However, it’s important to note that businesses must pay GST for their income from solar feed-in tariffs, which are exempt from GST for residential customers.