Interest Rates to Remain the Same for Second Quarter 2019:
The interest rates for tax overpayments and underpayments for the quarter beginning on 4/1/19 will be the same as the prior quarter. For noncorporate taxpayers, the rate for both underpayments and overpayments will be 6%. The 6% rate also applies to estimated tax underpayments for the second quarter of 2019. For corporations, the overpayment rate will be 5%, with a 3.5% rate applicable to overpayments exceeding $10,000. The underpayment rate for corporations will be 6%, except for large corporate underpayments, which will be 8%. Rev. Rul. 2019-5 and News Release IR 2019-21 .