From the Wikipedia entry on Tax per head:
With the Restoration of Charles II in 1660, the Convention Parliament of 1660 instituted a poll tax to finance the disbanding of the New Model Army (pay arrears, etc.) (12 Charles II c.9). The poll tax was assessed according to “rank”, e.g. dukes paid £100, earls £60, knights £20, esquires £10. Eldest sons paid 2/3rds of their father’s rank, widows paid a third of their late husband’s rank. The members of the livery companies paid according to company’s rank (e.g. masters of first-tier guilds like the Mercers paid £10, whereas masters of fifth-tier guilds, like the Clerks, paid 5 shillings). Professionals also paid differing rates, e.g. physicians (£10), judges (£20), advocates (£5), attorneys (£3), and so on. Anyone with property (land, etc.) paid 40 shillings per £100 earned, anyone over the age of 16 and unmarried paid 12-pence and everyone else over 16 paid 6-pence.
(Fetched 27 July 2013.)