When is the best time to merge social security?

Each insured person can only have one social security account, and the insured person with two social security accounts has to go through the account merger procedures, but there is no specific merger time. As long as the two social security accounts are combined into one before retirement, you can apply for a pension after reaching 15 years. Article 58 of the Social Insurance Law of People's Republic of China (PRC) * * * The employer shall, within 30 days from the date of employment, apply to the social insurance agency for social insurance registration for employees. If the social insurance has not been registered, the social insurance agency shall verify the social insurance premium it should pay. Employees-free individual industrial and commercial households who voluntarily participate in social insurance, part-time employees who do not participate in social insurance in the employing unit and their flexible employees shall apply to the social insurance agency for social insurance registration. The state establishes a national unified personal social security number. Personal social security number is a citizen's identity number.