How often must households report changes to their income or family size after their interview?

Households are required to report changes to their income or family size as they occur because timely updates ensure that benefits align with the current circumstances of the household. This is crucial in programs designed to provide assistance, as income and family size can significantly influence eligibility and the amount of aid provided. Reporting these changes promptly helps to maintain accuracy in record-keeping and ensures that the assistance provided reflects the household's actual needs and situation.

The other options suggest less frequent reporting, which could lead to benefits that are either over or under what the household should be receiving based on their latest circumstances. Annual or monthly reporting does not provide the necessary flexibility to address immediate changes, and reporting only at reapplication fails to account for significant life events that could happen at any time during the assistance period.