What does it mean to pay social security at the end of the year?

1, social security payment means that social security is not paid normally for a few months for some reason, and then the social security for these months is paid back. 2. Generally speaking, when people want to buy a house, settle down, retire, etc., and find that the accumulated payment time of social security does not meet the requirements of enjoying the corresponding treatment, they need to pay back the unpaid social security in the previous month to ensure that they can enjoy the corresponding social security rights and interests.