In my professional opinion - and this is just my view as apart from any industry standard or guideline - overtime should never be taken into account when calculating disposable income, unless it is regular and contractual.
Ang - to answer your query about my policy - income should be reassessed every year, as exenditure also rises. By reassessing the basic salary, this generally reduces the ongoing 50% payments, as the benchmark is lifted each year. I'm not saying this is the right way, but it works for me.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk