Katvik, Typically you can only pay for the past 6 years. So not 6 years in total, but the gaps that appeared in the last 6 years. My understanding is that there is a new law coming in from 2023. Because of this new law/system coming in (called the new state pension), you can make up for any gaps from 2012. You will have to make up for the gaps by the end of this tax year though. (2023 April). So that is why you can now make up for gaps longer than the last 6 years.