Lords were subject to taxation, yes. In England, for example, there was a broadly levied tax, the Danegeld, to which all landowners were subject. There were also occasional extraordinary taxes to pay for various notable events like the Crusades. read more
Medieval lords made other payments, though they might be thought of as fees rather than taxes. For example, if someone was called into settle a dispute, whether between commoners or nobility, he was provided payment for his time and trouble. read more
However, these taxes and rents were not necessarily paid in form of coins or other currency. Serfs of peasants could pay the taxes or rents either by working in the manor for various chores and by managing the land or they could also pay the taxes and rents by joining the troops of barons. read more
Taxation in medieval England was the system of raising money for royal and governmental expenses. During the Anglo-Saxon period, the main forms of taxation were land taxes, although custom duties and fees to mint coins were also imposed. read more