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6. Tax Assessment and Collection
  a.  Determination of Tax Base and Tax Amount
(1) The income tax is to be self-assessed and filed by the taxpayer.
(2) 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.
(3) 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.
(4) Determination must be completed within a year from the filing due date, except that
the Commissioner allows an extension of time for special investigation, or approves a
late determination based on extenuating circumstances.
(5)  Occasional assessment
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:
(a) when a taxpayer frequently moves his business place, domicile, or residence
without reporting such movements to the government;
(b) when a taxpayer has closed down or has suspended his business operation
due to poor business conditions or other reasons; and
(c) 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 income tax payable is less than the following amount, income tax will
not be assessed.
(1)  Withholding tax (excluding tax of interest income) : 1,000 won
(2) Interim prepayment tax: 200,000 won
  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
(1) 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.
(2) 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.