Pay-as-you-go tax
（重定向自PAYG）
Pay as you go (PAYG) is a system for businesses and individuals to pay installments of their expected tax liability on their income from employment, business, or investment for the current income year. When used as an adjective, it is often spelled pay-as-you-go. It is similar to pay-as-you-earn (PAYE) tax, used in the United Kingdom, the Republic of Ireland and other countries.