> I ignored the payroll tax, because I assumed that's not counted as part of the employee's gross income
Employee share of payroll tax is, employer share (which is shown reaching down from the bottom) is not.
> 13% total tax seems low.
Given what I've actually paid with a far above median income, 13% soubds reasonable. Its low as a nominal rate, but there are lots of credits and deductions available, and the before-tax median personal income is well below the cutoff for EITC, which can be a huge one. Heck, a large minority of the population pays zero or negative net income tax.
Employee share of payroll tax is, employer share (which is shown reaching down from the bottom) is not.
> 13% total tax seems low.
Given what I've actually paid with a far above median income, 13% soubds reasonable. Its low as a nominal rate, but there are lots of credits and deductions available, and the before-tax median personal income is well below the cutoff for EITC, which can be a huge one. Heck, a large minority of the population pays zero or negative net income tax.