- 37 - Unit : Million Baht Separate financial statements As at December 31, 2020 Balances Additions Write off Transfers in Balances as at (out) as at January 1, December 31, 2020 2020 Cost Dredging expenses 2,640 162 (2,348) - 454 Computer software 1,148 49 - 218 1,415 Total 3,788 211 (2,348) 218 1,869 Accumulated amortisation Dredging expenses (2,562) (31) 2,314 - (279) Computer software (954) (91) - - (1,045) Total (3,516) (122) 2,314 - (1,324) Computer software under installation 287 129 - (218) 198 Total intangible assets 559 743 Amortisation for the years ended December 31, 2021 140 2020 122 17. DEFERRED INCOME TAX/INCOME TAX The movement of deferred tax assets and liabilities during the years is as follows: Unit : Million Baht Consolidated financial statements Provisions for employee benefits Fixed assets Taxable loss carried forward Derivatives Others Total Deferred tax assets As at January 1, 2020 963 257 510 - 170 1,900 The effects from first-time adoption of new accounting policies to profit or loss - - - (136) - (136) Net charged/(credited) to profit or loss (148) 70 1,065 235 206 1,428 Net charged/(credited) to other comprehensive income 28 - - - (3) 25 As at December 31, 2020 843 327 1,575 99 373 3,217 Net charged/(credited) to profit or loss 34 (43) (1,569) (49) (88) (1,715) Net charged/(credited) to other comprehensive income (81) - - - (1) (82) As at December 31, 2021 796 284 6 50 284 1,420 339 NOTES TO THE FINANCIAL STATEMENTS IRPC PUBLIC COMPANY LIMITED
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