How long will it take for the social security unit to pay it by itself?

Legal analysis: social security does not stipulate how many years to pay, and you can pay it yourself. As long as you are old enough to have no job, you can go to the employment agency in your area and pay three years to get nine months' professional money. You can continue to hand it in later. If you find a job, you can pay social security from the filing unit. As long as you pay 15 years and have medical insurance for 20 years, you can get a pension at retirement age.

Legal basis: People's Republic of China (PRC) Social Insurance Law.

Article 4 Employers and individuals in People's Republic of China (PRC) shall pay social insurance premiums according to law, and have the right to inquire about payment records and personal rights and interests records, and ask social insurance agencies to provide social insurance consultation and other related services.

Individuals enjoy social insurance benefits according to law and have the right to supervise the payment of their own units.

Article 58 An employing unit shall, within 30 days from the date of employment, apply to the social insurance agency for social insurance registration for its 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 other flexible employees shall apply to the social insurance agency for social insurance registration.