First Quarter 2018 IRS Underpayment Interest Rates | Tax Lawyer MN

On December 5, 2017, the IRS announced that the First Quarter 2018 IRS underpayment interest rates and overpayment interest rates will remain the same as they were in the last quarter of 2017. This means that, the First Quarter 2018 IRS underpayment interest rates and overpayment interest rates will be as follows: On December 5, 2017, the IRS announced that the First Quarter 2018 IRS underpayment interest rates and overpayment interest rates will remain the same as they were in the last quarter of 2017. This means that, the First Quarter 2018 IRS underpayment interest rates and overpayment interest rates will be as follows:

four (4) percent for overpayments (three (3) percent in the case of a corporation);
four (4) percent for overpayments (three (3) percent in the case of a corporation);
four (4) percent for underpayments; six (6) percent for large corporate underpayments; and one and one-half (1.5) percent for the portion of a corporate overpayment exceeding $10,000.

The Internal Revenue Code requires that the rate of interest be determined 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 one-half (0.5) of a percentage point.

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 one-half (0.5) of a percentage point.

The First Quarter 2018 IRS underpayment interest rates and overpayment interest rates were computed based on the federal short-term rate determined during October of 2017 to take effect on November 1, 2017, based on daily compounding.

There are two principal applications for the First Quarter 2018 IRS underpayment interest rates in the context of US international tax law. First, the First Quarter 2018 IRS underpayment interest rates are used to calculate interest on the additional tax liability that has arisen as a result of filing amended federal tax returns.  This is also true with respect to tax returns that are amended as part of the OVDP or the Streamlined Domestic Offshore Procedures voluntary disclosure package.

Second, the First Quarter 2018 IRS underpayment interest rates are relevant to calculation of a PFIC (Passive Foreign Investment Company) interest on PFIC tax imposed on “excess distribution” under the default IRC Section 1291 PFIC calculation method.

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