This is how the bonus ($20k) for the E175 was broken down for us: (add an extra 5k for the Q400)
It’s based on experience. So depending on how many hours you have that can apply to a captain upgrade will determine your bonus.
The time that qualifies is:
Any 121 time
Part 135 PIC time with multi-engine and multi-crew
Military PIC (Commander) time with multi-engine and multi-crew
So if you calculate how many hours you have in these categories it will determine your bonus.
< 500 Hours you will receive $10,000 ($5,000 after OE and $5,000 18 months after OE)
500-749 Hours you will receive $15,000 ($10,000 after OE and $5,000 18 months after OE)
750+ Hours you will receive $20,000 ($15,000 after OE and $5,000 18 months after OE)