It would depend on your income and you would need to do a new I&E to work out your payments. Have a chat with your IP..
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
It would make things a bit more complicated, but nothing insurmountable and your income would have to be monitored more closely to ensure you pay the correct amount each month. It is unlikely that you would be allowed to reduce the current payment by much, if your earnings dipped, so be mindful that any "good" months will have to be used to offset the "bad" ones.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk