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Property, plant and equipment | 12 Months Ended
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Dec. 31, 2022
Property, plant and equipment. |
Property, plant and equipment | 4.Property, plant and equipment The following tables show the movements in the net book values of property, plant and equipment for the years ended December 31, 2022 and 2021, respectively: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of December 31, 2022
​ | ​ | ​ |  | IT |  | Laboratory |  | Leasehold |  | Assets under |  | ​
In CHF thousands | ​ | Furniture | ​ | equipment | ​ | equipment | ​ | improvements | ​ | construction | ​ | Total
Acquisition cost: |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2021 |  | 265 |  | 1,754 |  | 9,142 |  | 810 |  | 695 |  | 12,666
Additions |  | 20 |  | 151 |  | 576 |  | 184 |  | 5 |  | 936
Transfers |  | — |  | 4 |  | 47 |  | 646 |  | (697) |  | —
Balance at December 31, 2022 |  | 285 |  | 1,909 |  | 9,765 |  | 1,640 |  | 3 |  | 13,602
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated depreciation: |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2021 |  | (106) |  | (1,316) |  | (5,739) |  | (389) |  | — |  | (7,550)
Depreciation expenses |  | (53) |  | (283) |  | (1,278) |  | (179) |  | — |  | (1,793)
Balance at December 31, 2022 |  | (159) |  | (1,599) |  | (7,017) |  | (568) |  | — |  | (9,343)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Carrying amount: |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2021 |  | 159 |  | 438 |  | 3,403 |  | 421 |  | 695 |  | 5,116
December 31, 2022 |  | 126 |  | 310 |  | 2,748 |  | 1,072 |  | 3 |  | 4,259
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | As of December 31, 2021
​ | ​ | ​ |  | IT |  | Laboratory |  | Leasehold | ​ | Assets under |  | ​
In CHF thousands | ​ | Furniture | ​ | equipment | ​ | equipment | ​ | improvements |  | construction | ​ | Total
Acquisition cost: |  |  |  |  |  |  |  |  | ​ |  |  |
Balance at December 31, 2020 |  | 214 |  | 1,497 |  | 7,681 |  | 464 | ​ | 277 |  | 10,133
Additions |  | 51 |  | 250 |  | 1,268 |  | 346 | ​ | 695 |  | 2,610
Transfers | ​ | — | ​ | 7 | ​ | 270 | ​ | — | ​ | (277) | ​ | —
Disposals |  | — |  | — |  | (77) |  | — | ​ | — |  | (77)
Balance at December 31, 2021 |  | 265 |  | 1,754 |  | 9,142 |  | 810 | ​ | 695 |  | 12,666
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated depreciation: |  |  |  |  |  |  |  |  | ​ |  |  |
Balance at December 31, 2020 |  | (61) |  | (970) |  | (4,405) |  | (281) | ​ | — |  | (5,717)
Depreciation expenses |  | (45) |  | (346) |  | (1,398) |  | (108) | ​ | — |  | (1,897)
Disposals |  | — |  | — |  | 64 |  | — | ​ | — |  | 64
Balance at December 31, 2021 |  | (106) |  | (1,316) |  | (5,739) |  | (389) | ​ | — |  | (7,550)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Carrying amount: |  |  |  |  |  |  |  |  | ​ |  |  |
December 31, 2020 |  | 153 |  | 527 |  | 3,276 |  | 183 | ​ | 277 |  | 4,416
December 31, 2021 |  | 159 |  | 438 |  | 3,403 |  | 421 | ​ | 695 |  | 5,116
​ AC Immune continues to enhance its laboratory equipment to support its R&D functions. This effort has continued for the year ended December 31, 2022, with CHF 0.8 million invested in lab equipment, including the expansion of our leased lab space, and IT equipment, representing an increase of 7%. For the years ended December 31, 2022, 2021 and 2020, the Company incurred CHF 1.8 million, CHF 1.9 million and CHF 1.5 million in depreciation expenses, respectively.

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