§70.93. Interest rate. — Inbound Citations

(a) Interest at the underpayment rate referred to in § 70.93 of this part shall be paid on any unpaid amount of tax from the last date prescribed for payment of the tax (determined without regard to any extension of time for payment) to the date on which payment is received.

Any portion of an internal revenue tax (or any interest, assessable penalty, additional amount, or addition to tax) which has been erroneously refunded, and which is recoverable by a civil action pursuant to 26 U.S.C. 7405, shall bear interest at the underpayment rate referred to in § 70.93 of this part.

(a) Except as otherwise provided, interest shall be allowed on any overpayment of any tax at the overpayment rate referred to in § 70.93 of this part from the date of overpayment of the tax.