If you are interested, download DissoMaster for free for 30 days from their website (
Welcome to CFLR) and open up the program. Plug in some hypothetical numbers for husband's and wife's incomes, number of kids; then go to "Reports" at the top and click on the tab to open the drop-down box; then click on "Bonus Income" and the table will pop up that gives you all the percentages based on the numbers you plugged in for your case. You can print this out for use later. It's also handy because you can plug in bonus income for both sides (in case husband and wife each get bonuses) and the program gives you a sort of offset percentage.
It's a pretty sophisticated progam and most people only kind of half know how to use it.