It is based on the proposed NHS Scheme specific arrangements as contained in the Heads of Agreement.
The calculator will enable members of the NHS Pension Scheme to estimate their future benefits and see any changes to their current scheme benefits, under the Government’s proposed new scheme.
They do not allow you to calculate the impact of contribution increases.
The Department of Health previously published a separate employee contributions calculator for 2012/13 which enables NHS Pension Scheme members to calculate how much their contributions will increase, if at all, on a monthly basis, on both a gross and net of tax relief basis.
The DH calculator for the first year contribution rise is already on this website: contributions calculator