If you earned your pension before 6 April 1997:

If you earned your pension between 6 April 1997 and 5 April 2005:

If you earned your pension after 5 April 2005:

If you earned your pension before 5 August 2005:

If you earned your pension after 6 August 2005:

You would have been contracted out of the State Earnings Related Scheme (SERPS) if you worked for IBM anytime between 6 April 1978 and 5 April 1997. As a result, you and IBM would have paid a lower rate of National Insurance and your pension plan has to provide the benefits that you would have otherwise received from the State.

For members who reached State Pension Age (SPA) before 6 April 2016, the increase in your GMP is based on the increase in the CPI and a number of other factors.

Download our Information for Retirees Booklet for details about pension increases.

For more information on the State Pension, please view the State Pension factsheet.

Here is the listing of the most recent C and N Plan pension increases, based on when the pension was earned.

Here is the listing of the most recent I Plan pension increases.

Pension increases are awarded in April of each year and are the lower of the increase in the Retail Price Index (RPI) or 5%. The Government RPI figures that are used in the calculations are those recorded in the previous September.

Here is the listing of the most recent DSL Plans pension increases. These are based on when the pension was earned and the RPI recorded in December each year.