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TAX PENALTIES
A. Penalty on Failure to File Returns
If a resident either fails to file a tax return or under-reports the relevant income, an 
amount equivalent to 20% of the income unreported or under-reported will be 
 income amount un(under)reported      X tax amount properly calculated X 20%
 proper income amount to be reported 
included in the calculation of tax amount as follows:
B. Penalty on Non-payment or Underpayment of Tax
When tax is not paid properly, the penalty amounts to 0.03% on the unpaid amount per 
day.
When a taxpayers association fails to fully pay the income tax due within the time 
required, a penalty of 5% of the unpaid amount shall be added to the amount of tax due. 
C. Penalty tax on Failures to Withhold Tax
If a person subject to tax withholding fails to withhold tax at source or fails to pay the 
government tax withheld within the payment period, a penalty of 10% of the amount of 
tax not withheld is added to the amount of withholding tax.
D. Penalty tax on Failures to Report Withholding Invoices
If a concerned person fails to submit a payment report within the reporting period or if 
the reported facts concerning payment are found to be unclear as specified by the 
Presidential Decree, a penalty in the amount of 2% of the payment due shall be charged.
If a concerned person fails to issue or submit a proper tax invoice regarding the 
transaction involved, a penalty in the amount of 1% of the transaction shall be charged.
E. Penalty tax on related to Gathering Relevant Tax Invoices
If a taxpayer has an obligation to keep double entry books but fails to keep available invoices 
in the form generally accepted (including credit card receipts) as supporting evidence for the 
payment of goods received and services rendered, a penalty may be imposed in the amount of 
2% of the total value of such unsupported transactions. The penalty may be applied even if 
the expense deduction is sufficiently substantiated to be allowed.
If a taxpayer who has an obligation to keep double entry books does not submit a list of 
invoices to the tax office, a penalty tax amounting to 1% of the unreported amount shall 
be charged.
F. Penalty tax on Failures to maintain Adequate Books and Records
If a taxpayer operating a business fails to maintain proper books and records, such 
taxpayer will be subject to penalty tax equal to 20% of the amount of tax due for the tax 
year involved multiplied by the following rate "R."
    R = improperly documented portion of taxable income divided by total taxable income