VAT Returns
There are two return periods each year, i.e. 1 January to 30 June, and 1 July to 31 December. However, preliminary VAT returns are required for the periods 1 January to 31 March, and 1 July to 30 September.
The VAT return should be filed within 25 days (50 days in the case of a foreign company's Korean branch) after the end of each calendar quarter.