I bought social security in a city and later changed my job in another city. Does social security need to be transferred?

This problem should be viewed from two aspects. In the first aspect, you went to work in another city, so you didn't change your work unit. In this case, it is generally not necessary to transfer to social security. Because many work units have their own branches or subsidiaries, the newly established branches or subsidiaries, as the staff of the work units, need the support of the past or mobilize the past work.

So in fact, you didn't leave this work unit, which means you didn't terminate the labor contract with your original work unit, so you don't need to transfer the social security relationship, because your social security may be paid through your group company, so in this case, you will pay the social security in your original work city, so the premise of not leaving your original work unit is that the social security does not need to be transferred.

Social security contributions must reach the fixed number of years:

According to the national regulations, the minimum payment period of social security is 15 years, that is, after paying 15 years, you can receive the pension when you retire. When you reach retirement age and the social security payment is less than 15 years, then the state will refund the social security paid. If the money comes from your previous work unit, you won't get the money.

Of course, even if you don't pay 15 years when you retire, you can make up the premiums you need to pay in the future at one time, so as to get old-age security.