Third quarter of 2018 will have same interest rates.

The Internal Revenue Service today announced that interest rates will remain the same for the calendar quarter beginning July 1, 2018, as they were in the quarter that began on April 1. The rates will be:

• 5 percent for overpayments, 4 percent in the case of a corporation;
• 2.5 percent for the portion of a corporate overpayment exceeding $10,000;
• 5 percent for underpayments; and
• 7 percent for large corporate underpayments. 

The rate of interest is decided on a quarterly basis.  For taxpayers other than corporations, the overpayment and underpayment rate is the federal short-term rate plus 3 percentage points.

Generally, in the case of a corporation, the underpayment rate is the federal short-term rate plus 3 percentage points and the overpayment rate is the federal short-term rate plus 2 percentage points. The rate for large corporate underpayments is the federal short-term rate plus 5 percentage points. The rate on the portion of a corporate overpayment of tax exceeding $10,000 for a taxable period is the federal short-term rate plus 0.5 of a percentage point. Read More