I am a few years short from getting the full state pension and am looking at making voluntary contributions. At the moment I can pay for the two years that I have missed, I missed them both in full. The voluntary contributions for these two years are vastly different, 20/21 is more than double 21/22. Can anyone explain to me why this is please before I make any payment. Am wondering about paying for 21/22 and not 20/21. Can I do this? Thank you