Alberta is one of the few Canadian provinces that does not charge a Provincial Sales Tax (PST). Albertans pay only the federal 5% Goods and Services Tax (GST) on purchases, while residents of most other provinces pay additional provincial sales tax (or a combined HST). This tax advantage has historically been funded by Alberta's significant oil and gas royalty revenues, allowing the province to maintain services without taxing consumption. The 'Alberta Advantage' of no PST is politically popular, though during oil price downturns, debates arise about whether introducing a sales tax could provide more stable provincial revenues.