The basic rate (BR) of tax remains at 20% for 2017/18, higher rate (HR) a 40% and the additional rate (AR) is 45%.
Basic rate applies to the first £33,500 of taxable income, higher rate applies to the next £116.500
Everything over £150,000 is then taxed at 45% (AR)
BR can be increased by your charitable donations and payments into a personal pension plan.
Dividends are taxed at the dividend ordinary rate of 7.5% to the extent they fall within the BR band. At the dividend upper rate of 32.5% within the HR band and the dividend AR rate of38.1% within the AR Band.
The first £5,000 of dividends are at 0%