The Promote Child Thriving Act establishes a tax credit for married individuals with biological children, aimed at incentivizing the upbringing of children in a marital home. For tax years starting in 2025, married couples can claim a credit of $500 for each child under 18 residing with them, or $1,000 if they were married before the child's birth. To qualify, parents must be listed on the birth certificate, reside together for at least six months of the year, and remain married throughout the tax year. The credit cannot reduce tax liability below zero, and any unused credit can be carried forward for up to ten years.

The Act emphasizes the importance of the marital family structure for child welfare, citing studies that show children raised by both biological parents in a married household fare better in various aspects of life. It also includes provisions for claiming the credit, including penalties for fraudulent claims. The Act is set to take effect on July 1, 2025, and includes a declaration of emergency for its immediate implementation.