Interest rates: underpayment and overpayments. The rates for interest determined under section 6621 of the Code for the calendar quarter beginning July 1, 2013, will be 3 percent for overpayments (2 percent in the case of a corporation), 3 percent for the underpayments, and 5 percent for large corporation underpayments. The rate of interest paid on the portion of a corporation overpayment exceeding $10,000 will be 0.5 percent.

This revenue ruling provides that the fideicomiso or Mexican Land Trust arrangements described in this ruling are not trusts within the meaning of § 301.7701-4(a).

This notice contains updates for the corporate bond weighted average interest rate for plan years beginning in June 2013; the 24-month average segment rates; the funding segment rates applicable for June 2013; and the minimum present value rates for May 2013. The rates in this notice reflect certain changes implemented by the Moving Ahead for Progress in the 21st Century Act, Public Law 112-141 (MAP-21).