If the first estimated tax payment is required to be made after the fourth month, the estimated tax payment shall be made on the last day of the tax year and the estimated tax shall be paid in one installment based upon the taxable income for the first four months if the tax year ends during the fifth month, or for the first five months if the tax year ends during the sixth month.
If the first estimated tax payment is required to be made on the last day of the sixth month of the tax year, the estimated tax shall be paid in two equal installments. The first installment shall be due on the last day of the sixth month based upon the first five months' taxable income annualized by multiplying the taxable income by the number of months in the tax year and dividing by five. The second installment shall be due on the last day of the tax year.
If the first estimated tax payment is required to be made after the last day of the sixth month of the tax year, the estimated tax payment shall be made on the last day of the tax year and the estimated tax shall be paid in one installment based on the taxable income for the first seven months if the tax year ends during the eighth month, or for the first eight months if the tax year ends during the ninth month.
If the first estimated tax payment is required to be made on the last day of the sixth month of the tax year, the estimated tax shall be paid in three equal installments. The first installment shall be due on the last day of the sixth month based upon the first five months' taxable income annualized by multiplying the taxable income by the number of months in the tax year and dividing by five. The second installment shall be due the last day of the ninth month of the tax year. The third installment shall be due on the last day of the tax year.
If the first estimated tax payment is required to be made on the last day of the ninth month of the tax year, the estimated tax shall be paid in two equal installments. The first installment shall be due on the last day of the ninth month, based upon the first eight months' taxable income annualized by multiplying the taxable income by the number of months in the tax year and dividing by eight. The second installment shall be due the last day of the tax year.
If the first estimated tax payment is required to be made after the last day of the ninth month of the tax year, the estimated tax payment shall be made on the last day of the tax year and the estimated tax shall be paid in one installment based upon the taxable income for the first nine months if the tax year ends during the tenth month or for the first ten months if the tax year ends during the eleventh month.
This rule is intended to implement Iowa Code section 422.92.
Iowa Admin. Code r. 701-505.3
Editorial change: IAC Supplement 11/2/22