I don't have much knowledge about GIS , but I will share what I know, So Please confirm from reliable sources
In GIS two parts are involved. I mean GIS include Insurance Fund amount and Saving Fund amount. Insurance fund is applicable immediately when a person join in new cadre or new joining Where as Saving fund is started from January (Next) only.
Insurance and Saving Fund is deducted in 30:70 ratio.
Let we explain in some more detail:
In A class GIS = 120 (Insurance Fund = 36 and Saving Fund= 84)
In B class GIS = 60 (Insurance Fund = 18 and Saving Fund= 42)
In C class GIS = 30 (Insurance Fund = 9 and Saving Fund= 21)
In Dclass GIS = 15 (Insurance Fund = 4.50 and Saving Fund= 9.50)
For eg. If earlier Master cadre GIS deductions was Rs 30 (Inusrance Fund = 9 and Saving Fund = 21) So in this case When Master Cadre grade pay changed to Rs 4600 then GIS deduction should be Rs 39 (Insurance Fund = 18 and Saving Fund =21), this is becasue Insurance Fund is applicable immediately and Saving Fund starts in Next January So, In this case From January 2012 GIS will be Rs 60 (Insurance = 18 and Saving = 42)
But in the mean time When Grade Pay is changed to Rs 5000 So GIS in December 2011 should be = 57 (Insurance Fund = 36 and Saving Fund = 21) and From January 2012 GIS should be deducted as = 120 (Insurance Fund= 36 and Saving Fund= 84).
Please confirm above given statement from reliable sources.