15-30-2512. Estimated tax — payment — exceptions — interest. (1) (a) Each individual subject to tax under this chapter, except farmers or ranchers as defined in subsection (6), shall pay for the tax year, through employer withholding, as provided in 15-30-2502, through payment of estimated tax in four installments, as provided in subsection (2) of this section, or through a combination of employer withholding and estimated tax payments, at least:

(i)90% of the tax for the current tax year, less tax credits and withholding allowed the taxpayer; or

(ii)an amount equal to 100% of the individual’s tax liability for the preceding tax year, if the preceding tax year was a period of 12 months and if the individual filed a return for the tax year.

(b)Payment of estimated taxes under this section is not required if:

(i)the combined tax liability of employer withholding and estimated tax for the current year is less than $500 after reductions for credits and withholding;

(ii)the individual did not have any tax liability for the preceding tax year, which was a tax year of 12 months, and if the individual was a citizen or resident of the United States throughout that tax year;

(iii)the underpayment was caused by reason of casualty, disaster, or other unusual circumstances that the department determines to constitute good cause; or

(iv)the individual retired in the tax year after having attained the age of 62 or if the individual became disabled in the tax year. In addition, payment of estimated taxes under this section is not required in the tax year following the tax year in which the individual retired or became disabled.

(2)Estimated taxes must be paid in four installments according to one of the following schedules:

(a)Subject to the due date provision in 15-30-2604(1)(b), for each taxpayer whose tax year begins on January 1, estimated tax payments are due on the following dates: