Do you have a link to the actual study or the breakdown what went into this?
> A recent estimate conducted by the Brookings Institution projected the cost of raising a child for a middle-income, two-parent married family with two kids to be north of $310,000.
>The estimate assumes the youngest child would be born in 2015 and covers raising the child through the age of 17. It does not include the cost of sending the child to college.
This seems to be the source:
https://www.brookings.edu/wp-content/uploads/2022/08/Brookin...
https://www.brookings.edu/blog/up-front/2022/08/30/its-getti...
Edit: not only does the study exclude college costs, but it excludes daycare costs, which are relevant to pretty much all dual income couples.