Final answer:
The income tax is paid on a pay-as-you-go basis through quarterly payments.
Step-by-step explanation:
The income tax is paid on a pay-as-you-go basis through quarterly payments. This means that individuals and businesses are required to estimate and pay their income tax liability on a quarterly basis throughout the year. Quarterly payments help to ensure that taxes are paid on time and reduce the burden of a single large payment at the end of the year.