Posting here as it gets the most traffic and I've seen loads of posts over the years from people worrying about pensions/retirement, so hope this helps someone...
Just wanted to share this in case there was anyone who needs to know/think about this. My sister worked abroad so missed out on a lot of national insurance contributions and recently paid back the missing years so her state pension is now unaffected. I was talking to a friend who had a career break due to having children and she didn't know you could do this. She wasn't working and didn't receive child benefit because her partner was a high earner, but the relationship has since imploded and she now has a big gap in her national insurance contributions.
So in case anyone is in the same boat and wants to check that their national insurance contributions are up to date and that they are on track to get the full state pension or need to make some payments, please visitwww.gov.uk/check-national-insurance-record (or Google "check national insurance contributions" if you don't like clicking URLs posted on random Internet sites)
Normally you can buy back up to six years, but when the 'new' state pension was introduced, arrangements were put in place to let you plug gaps all the way back to 2006. This larger window closes on 5 April 2025.
Read more about it on
https://www.moneysavingexpert.com/savings/voluntary-national-insurance-contributions/