do i pay the same percentage of tax on all my income 
no you only pay your highest percentage tax rate on the portion of your income that exceeds the minimum threshold for that tax bracket a single person who earns 100 000 would fall into the 22 tax bracket but only on the portion of their income that exceeds 47 150 their income from 11 600 up to 47 150 would be taxed at a rate of 12 income below 11 600 is taxed at a 10 rate these income ranges apply to the 2024 tax year 2