That actually checks out. If you take the median U.S. household income ($74,580) and factor in the effective tax rate (10.9%), eliminating federal income taxes would save the average household $8,167.50 per year. Subtract the $3,488.27 in extra costs from tariffs, and the net savings is still $4,679.23.
So yeah, if those numbers hold up, the median American household actually comes out ahead after everything is accounted for.