Past-Due Maintenance

If you have been ordered to pay maintenance (alimony) and you fail to make an alimony payment on time, the amount that was owed will become past-due maintenance

Unless the past-due maintenance is paid off, the next child support order you receive will show that you owe both the current alimony payments plus the past-due alimony.  

In Illinois, past-due maintenance grows at an interest rate of 9% annually.