Situation : Mid 40's, self employed. On track for state pension (although not the top amount) if it still exists when I retire. Mortgage will be paid off at the latest by age 50 (hopefully before). I Earn circa £20k. How much should I be putting in my pension each month when my pot currently sits at £20k (the grand total). I realise I'm behind but how much should I be putting away to catch up?