I'm just starting year 5 of my iva but lost my job yesterday. I've suspended my payments and spoken to my IP about a full and final offer based on contributions to date. I suppose I'm lucky that this has happened so far into my iva. I suspect Its different if you're in the early years. I've seen other posts on here where people have taken a break of up to a year and then started up the payments again. I think it Depends on advice you get from your IP ... I hope my offer will be accepted but will have to wait to see What the creditors come back with
If your IVA is covered by the IVA protocol, there are redundancy provisions contained within the proposal, and the ability to take a payment break for up to six months - which can be extended with the express agreement of creditors.