The Promote Child Thriving Act establishes a tax credit for married individuals with biological children under the age of 18, aimed at incentivizing the upbringing of children in a marital home. For tax years 2025 and beyond, eligible parents can receive a credit of $500 for each child residing in their home while married, and $1,000 if they were married prior to the child's birth. To qualify, parents must be listed on the child's birth certificate, reside together for at least six months of the tax year, and remain married throughout the year. The credit must be claimed on a form prescribed by the Oklahoma Tax Commission and cannot reduce tax liability below zero, although unused credits can be carried forward for up to ten years.

The bill emphasizes the importance of the marital family structure for child welfare, citing various studies that indicate children raised by both biological parents in a married household tend to have better outcomes in terms of health, education, and overall well-being. It also includes provisions for penalties related to fraudulent claims and declares an emergency for the act to take effect immediately upon passage, with an effective date set for July 1, 2025.