The amount that initially may be contributed or added to a retirement savings bond in a calendar year by an Auto-IRA custodian on behalf of any participant is limited by the applicable annual contribution limits provided under the Internal Revenue Code and regulations. The total value of a retirement savings bond that may be held by an Auto-IRA custodian in an IRA on behalf of any participant shall not exceed $15,000 for each state Auto-IRA program.
31 C.F.R. § 347.32