If memory serves, when I changed status, the formula was something like:
1. Determine your present pay class. That should be the lowest salary that meets your current pay without reducing it.
2. Take the difference between IPC 0 and IPC 1 of your present rank.
3. Add that value to your present IPC. This is your entitlement to pay increase upon promotion.
4. Use the CBI's to find where your pay scale and table are upon promotion.
5. Find where that least amount on the appropriate scale and table that satisfies that value. This conceivably means a $1 (or no) pay raise.
A ficticious example:
MCpl Bloggins has applied for and been accepted into the UTPNCM program. Presently, he's getting MCpl 3 for a total of $4300 a month. MCpl 0 is $4100 a month and MCpl 1 is $4225 - a total of $125 a month difference. So, MCpl Bloggins is entitled to $4325 upon promotion to OCdt.
He refers to the proper tables. OCdt 7 makes $4100 a month. OCdt 8 Makes $4210 a month. OCdt 9 makes $4336 a month. Since his entitlement is only $4325, MCpl Bloggins gets OCdt 8, for a grand total of a $10 pay raise.