Under the provisions of Clause 4, Article 2 of the Law on Social Insurance, voluntary social insurance participants are Vietnamese citizens aged full 15 years or older and not covered by compulsory social insurance. as prescribed by law.

In Article 9 of Decree No. 134/2015/ND-CP dated December 29, 2015 of the Government stipulating the case where one-off payment for the insufficient number of years, for social insurance participants who satisfy the condition on retirement age for pension enjoyment and whose insufficient period of social insurance premium payment is 10 years (120 months) at most. In this case, they may pay social insurance premiums so that their payment period reaches full 20 years in order to receive pension.

In your case, you are a self-employed worker and not subject to compulsory social insurance, so you can participate in voluntary social insurance. This year, you are 50 years old then you should immediately participate in voluntary social insurance until full 10 years of payment of social insurance, which facilitates you to pay one time for the insufficient 10 years of payment to enjoy your pension.