Your pension benefits are calculated as follows.
For membership from 1 April 2014 onwards:
A pension of 1/49* x pensionable pay for each scheme year (pension revalued each year)
For membership from 1 April 2008 to 31 March 2014:
A pension of 1/60 x total membership x final pay
For membership prior to 1 April 2008**:
A pension of 1/80 x total membership x final pay
PLUS
A lump sum of 3/80 x total membership x final pay
* If you're in the 50/50 section of the Local Government Pension Scheme (LGPS), you'll build up a pension based on a 1/98 accrual rate
** If you decided to pay extra contributions to purchase additional years of membership prior to 1 April 2008, your pre 1 April 2008 membership will be increased accordingly.
Your pension will be worked out in separate parts (as described above), depending on when it was built up, and added together to give the total.
If you're purchasing additional pension via Additional Regular Contributions (ARCs) or Additional Pension Contributions (APCs) your total pension will be increased accordingly.