Working Papers

Working papers in this section received financial support from the Research Fund of the Seoul National University Asia-Pacific Law Institute, donated by the Seoul National University Law Foundation.


Ji-Hyun Yoon, A Review of the Supreme Court Decisions on the Issue of the so-called “Notice of Increase in Amount of Income” under Korean Income Tax Law (2022)

30 Jun 2025

Ji-Hyun Yoon, A Review of the Supreme Court Decisions on the Issue of the so-called “Notice of Increase in Amount of Income” under Korean Income Tax Law — After the Court’s Landmark 2006 Decision, 租稅와 法 , Vol.15, No.2 (2022), pp.1-79.

<Abstract>

Under Korean corporate income tax law, when a tax assessment is made,  the  tax  authorities  are  also  required  to  further  examine  whether  the  corresponding corporate asset or profit is still inside the corporate solution. If it is not and found out to have gone out to the hands of someone  else  so  that  it  has  become  his  or  her  taxable  income,  the  tax  may  be  collected,  according  to  income  tax  law,  from  the  corporation.  It  is in line with the general tendency of Korean income tax law that withholding  is  expansively  used  as  means  of  tax  collection. 

In truth, this is not a case of typical tax withholding in that the relevant asset or profit has already been transferred to the individual taxpayer without the corporation, the withholding agent, has never had any chance to withhold income tax. However, the Korean Income Tax Act  insists  on  calling  it  withholding,  and  so  as  to  facilitate  the  so-called  withholding procedure, has invented a peculiar legal fiction. Under this fiction,  the  tax  authorities  serve  a  document  titled  “Notice  of  Increase  in  Amount of Income” (“NIAI”) on the corporation, and when this NIAI has  been  duly  served,  the  relevant  payment  of  income  is  deemed  to  take  place.  Consequently,  the  duty  of  withholding  arises  at  this  very  moment.   

This  unique  feature  of  Korean  income  tax  act  has  long  been  in  use,  and  effectively  employed  by  the  tax  authorities  in  securing  tax  revenue  when  they  have  difficulty  in  collecting  tax  from  individual  taxpayers. 

When it comes to procedural aspects of this NIAI, the controversial issue  was  what  type  of  lawsuit  the  corporation  whould  file  to  dispute  the  withholding  tax.  The  Korean  system  of  tax  litigation,  which  has  largely  been influenced by the German and the Japanese system, is in a large part built on the concept of “administrative act,” and usual tax assessments  generally  qualify  as  administrative  acts.  A  refusal  to  correct  a  tax return made by a taxpayer may also falls under this category of “administrative  act.”  However,  the  Supreme  Court  of  Korea  before  2006,  had consistently held that the NIAI is not an administrative act, thus cannot be invalidated by the court’s “cancelation decision.” Since the “cancelation lawsuit” was and still is by far the best known and most frequently used form of lawsuit under the Korean system of administrative procedure, this holding had given headache to the taxpayers  and  their  legal  advisers.  The  holding  had  long  been  subject  to  broad  and  intense  criticism,  and  finally,  the  Supreme  Court  of  Korea  in  2006  overturned  this  old  and  well-established  case  law  to  hold  that  the  NIAI  is  an  administrative  act,  and  thus  can  be  invalidated  by  a  court’s  “cancelation  decision.” 

A  new  series  of  decisions  followed,  building  on  this  new  holding  and  gradually formed a new system of case law with respect to various procedural  issues  of  the  NIAI.  Now  that  longer  than  fifteen  years  of  time  have  passed  since  the  2006  decision,  this  article  is  an  attempt  to  recollect  and review those important decisions that constitute the foregoing new system  of  the  NIAI.  In  all,  twelve  decisions  are  reviewed  with  their  basic  facts and the legal issues of each respective case, and given short comments  by  this  author.  The  Supreme  Court  appears  basically  to  have  succeeded in forming a fairly coherent set of case law, but in a few decisions the author believes that more and better reasoning could and should have been presented to justify the final holdings. It is also submitted  that,  once  the  NIAI  has  been  recognized  as  an  important  legal  concept  in  the  entire  system  of  tax  procedures,  there  are  places  where  the  relevant statutory acts should include more provisions that explicity regulate  this  concept.


<Keywords>

tax procedure, withholding tax, “notice of increase in amount  of  income”  (NIAI),  administrative  act,  cancelation  procedure

 

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