The Child Tax Credit (CTC) was created in 1997 and significantly expanded by the TCJA (2017) and again temporarily by the American Rescue Plan (2021).
The 2021 expansion: $3,000/child ages 6-17, $3,600/child ages 0-5, full refundability (the lowest-income families got the full benefit), and monthly advance payments. The expansion lapsed at the end of 2021. Current law: $2,000/child, only partially refundable, no monthly payments.
Empirical evidence: the 2021 expansion is credited with cutting child poverty roughly in half; expiration roughly reversed those gains. Effects on parental labor-force participation are debated.
Reform proposals range from making the 2021 expansion permanent (some with means-testing or phase-outs) to varied "family allowance" designs.