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ASSESSMENT AND COLLECTION
The income tax is to be self-assessed and filed by the taxpayer. However, the government 
will correct the tax base and the tax amount if there are any omissions or errors in the 
return filed, or if the taxpayer has not submitted the payment statements or the aggregate 
summary of accounting statements in whole or in part.
A. Determination of Tax Base and Tax Amount
In cases where the government determines or corrects the tax base and the tax amount 
payable by a taxpayer, the tax base and the tax amount must be determined or corrected 
according to the law based on the final return and the attachments thereto, or by a field 
audit.
Determination must be completed within a year from the filing due date except in cases 
such that the Commissioner allows an extension of time for special investigation, or 
approves a late determination based on extenuating circumstances.
To prevent income tax evasion, the government may, monthly or occasionally, determine a 
tax base prior to the filing or determination period in the following 
circumstances(Occasional assessment) :
¡©  when a taxpayer frequently moves his business place, domicile, or residence without 
reporting such movements to the government;
¡© when a taxpayer has closed down or has suspended his business operation due to poor 
business conditions or other reasons; and
¡© when a taxpayer is located in an area deemed to be a place of frequent moves for 
place of business, residence, or domicile.
B. Minimum Taxable Floor
If the amount of other income is not more than 1,000 Won per case, income tax is 
waived.
C. Notice on Tax Base and Tax Payable
If the government determines or adjusts a tax base or a tax amount, the government shall 
notify the concerned resident the tax rates and/or any other necessary matter in writing.
D. Collection of Tax
If a taxpayer does not pay the full tax amount for the year in question, the government 
will endeavor to collect the unpaid tax amount within three months after the due date of 
payment.
When the income tax amount paid by the taxpayer is less than that determined by the 
government, the unpaid amount of tax will be collected.