Ah, right ... all depends upon the amount. You will be asked to pay the missing amount, if it was a genuine oversight most IP's will allow a period of time by extending the IVA.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014
For example my last payment is due to October if it's found I owe for example £800 due to not paying in enough overtime, bonus ect. Will they give me the option to extend? Do I just pay what I owe, or do they add on fees . Thanks for all the help.