Pay as you go may refer to:

• PAUG, a structured financial product
• "Pay as you go", a general term for the concept of a prepaid mobile phone.
• Pay-as-you-go tax, a system for businesses and individuals to pay installments of their expected tax liability.
• PAYGO, a system where budgetary restrictions demand paying for expenditures with funds that are made available as the program is in progress
• The pay-as-you-go constraints on entitlement and tax legislation enacted for the U.S. Government by the Budget Enforcement Act of 1990.
• Pay-as-you-go roads, a form of road pricing
• Pay-as-you-go car clubs, such as City Car Club

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