Salaries were introduced for Members of Parliament in 1911. Before that date it was assumed that MPs would have other sources of income; this changed as the first working class MPs began to be elected.
Since 1971, the salary level for MPs has been set by an agreed formula that is based on senior civil service pay bands. This has been subject to an independent review by the Senior Salaries Review Body (SSRB) in the first year of each new Parliament. From the start of the 2010 Parliament, responsibility for parliamentary pay, pensions and MPs’ expenses claims was transferred to the Independent Parliamentary Standards Authority.