Hello savagj1,
I am self-employed and receive a form from HMRC twice a year in reference to Class 2 NICs, it used to be 4 times a year. It states how much is due and for the period it is due, viz 07-04-2013 to 05-10-2013. At the bottom of the form is a payment slip.
There is extra text on the form, verbatim this is,
"Tell us now if you're no longer self employed as you may not owe this. If you pay late or do not pay you may lose your right to State Pension and benefits. If you fail to pay a private debt collection agency may contact you , or we may collect what you owe through your tax code."
The form continues with details of outstanding liability periods.
As far as I am aware any NICs over and above Class II are collected through the Income Tax system, and each year's, albeit previous year's liability will be calculated based on his annual declaration of income on an annual Tax Return Form.
I suspect that it will be your choice with regard to payment of unpaid NICs, but it is quite likely it could affect State Pension Rights.
The telephone number for HMRC, based in Longbenton, Newcastle-on-Tyne at the top of my form for Class 2 NIC is;
084591 54655 I think you should contact them as soon as possible, this is a situation that needs resolving, it will not go away if ignored, but I suspect you are aware of that. I am sure they will be very helpful.
Alarm bells started ringing when I read your post, if NICs are not up to date, what about Income Tax? Does he have an Accountant? Everyone has different circumstances. The majority of my income is from Pensions and Investments, but I run a small Consultancy, which means I get involved with NICs, I am still of an age where I am obliged to pay NICs. However I hope the above is of assistance.
I wish you good luck with this problem, but from the tenor of your original post I suspect you have the determination to sort things out.