How to calculate the length of service when social security is interrupted?

Cumulative calculation of length of service. If your social security has been interrupted, it doesn't count. For example, you interrupted social security for six months on 14, and the accumulated service is only 0.5 years. If this is your case, you can add up the social security of two jobs, that is, three and a half years of service.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.