‘Usually you have to pay voluntary Class 3 contributions before the end of the 6 th tax year following the year in which they are due. These limits can be extended in certain circumstances. Also, if you pay Class 3 contributions later that the end of the second tax year in which they were due, you would normally be charged at a higher amount. We have extended the time limits for paying voluntary Class 3 contributions for the tax years 1996/97 to 2001/02 to5 April 2009 . The table below shows what you can pay. If you do not pay by the first date shown [the date under the heading “ Pay without penalty ” in the table], the amount may be more when you do come to pay. We cannot accept payment if we get it after the final time limit shown [that is, the respective dates under the heading “ Final time limit ” in the table].’