Article 535Delinquency Charge on the Mineral Product Tax Filed and Paid After the Due Date for Payment

①If a taxpayer of the mineral product tax pays the tax after the due date for payment under Article 521, the taxpayer must pay it with the addition of an amount of delinquency charge equivalent to the amount calculated by multiplying the tax amount by a rate of 14.6 percent per annum (7.3 percent per annum for the period up to the day on which one month has elapsed from the day following that due date for payment), according to the number of days in the period from the day following the due date for payment under that Article to the date of payment.

②If the mayor of the municipality finds that there were unavoidable grounds for the taxpayer's failure to pay the tax by the due date for payment under Article 521, the mayor may reduce or exempt the amount of delinquency charge under the preceding paragraph.