State income taxes are usually pretty low.
Texas and Florida don't have an income tax.
Georgia ranges from 1% to 5.5%.
California goes all the way up to 13%.
In NYC, earning about $100k a year, the effective rate is ~28% tax (ie, you pay $28k tax a year), including federal (~15%) and state (~5%), social security etc.
In the UK, for £100k, it looks like it’s 27.4%.
So very similar levels.
So you pay zero on the first £12,570 of earnings. Basic rate of 20% from £12,571 to £50,270 of earnings. And then 40% on £50,271 onwards.
(We have additional rate over £150,000 of 45%).
It's important to remember you don't pay a flat %age on your income. It's worked out as a precentage of income you earn inside the thresholds
You also forget a major part of tax levied on workers but not on owners - national insurance.
That doesn't include VAT (or whatever it's called in America), tariffs, excise duties though, does it? It'd be curious to see a comparison between countries that would cover all those things (like how much you earn, and how much you actually pay for some average set of goods).
# Federal
* Long Term Capital Gains Tax = 20%
* Short Term Capital Gains Tax = 37%
* Earned Income / Ordinary Income Tax = 37%
* Net Investment Income Tax = 3.8%
* Medicare Payroll Tax (W-2 Wages) = 1.45%
* Additional Medicare Tax (W-2 Wages) = 0.9%
# State (California has the highest rate) * CA State Income Tax = 12.3%
* CA Mental Health Tax = 1%
In summary, if you make "a lot" of money in California, you'd be paying combined Federal/State taxes of at least 37.1% and as much as ~55%, depending on the type of income. Deductions and credits mostly phase out at said income levels. In particular, Trump's doing away with the State and Local Tax (SALT) deduction meant that now you also pay both Federal and State taxes on the same income as if the other tax (Federal or State) did not exist.