articleThe Brief Raising a child to age 18 costs an average of $303,418, but the actual price tag depends heavily on where you live. Hawaii is the most expensive state, while New Hampshire is the cheapest. In 22 states, parents dedicate at least 20% of their annual income to raising a child. New Jersey is the fifth most expensive state with costs reaching $312,295, followed by Pennsylvania in the 29th spot at $249,441. Hawaii currently ranks as the most expensive state for parents, with the total financial burden exceeding $412,000.