The federal Earned Income Tax Credit (EITC) is a refundable tax credit for working families with low and moderate incomes. The credit provides a substantial income supplement to families with children and thus helps families finance basic necessities or invest in longer-term household development. In recent years, political support for the EITC has declined. Social workers should be prepared to advocate against policy changes that would reduce the impact of the EITC. Social workers could also support EITC outreach campaigns and advocate for more and expanded state EITCs.