The Child Tax Credit is a refundable credit available to taxpayers with qualifying children. The credit is $3,600 per child under the age of 6 and $3,000 for children aged 6-17 at the end of the tax year. For the child to qualify, he or she must: Be your son or daughter, stepchild, eligible foster child, brother or sister, half-brother or half-sister, or a descendant of one of these Not have provided more than half of their own financial support during the tax year Have lived with you for more than half the tax year Be claimed as your dependent on your tax return Not file a joint return with a spouse (or only file it to claim a refund) Have been a U.S. citizen, national or resident alien The credit will begin to phase out (be reduced) if your modified adjusted gross income (“MAGI”) exceeds the following: $150k if married filing joint or as a qualifying widow or widower $112.5k if filing as head of household $75k if single or married filing separately