The contracts mentioned in article L. 144-1 may allow members to pay additional premiums or contributions for the years between the date of their affiliation to the compulsory basic old-age insurance scheme and the date of their enrolment in the contract. The amount of the additional premium or contribution to be paid in a given year must be equal to that of the premium or contribution fixed for that same year in application of article R. 144-2.
In the event of non-payment of the additional premium or contribution to be paid in a given year, payment of this premium or contribution cannot be carried over to another year.