Company: NCNA
Filing Date: 2025-03-20
Form Type: 20-F
Source: 0000950170-25-042709
Chunk: 183

Company: NuCana plc
Filing Date: 2025-03-20
Form: 20-F
Item: Item 5
Chunk 183
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 Exchange Gains (Losses)
 Net foreign exchange gains (losses) primarily relates to cash held in U.S. dollars.
Finance Income
Finance income relates to interest earned on our cash and cash equivalents.
Income Tax Credit
We are subject to corporate taxation in the United Kingdom and our wholly owned U.S. subsidiary, NuCana, Inc., is subject to corporate taxation in the United States. Due to the nature of our business, we have generated losses in the United Kingdom since our inception. Our income tax credit recognized represents the sum of the research and development tax credits recoverable in the United Kingdom and in the United States, and income tax payable in the United States.
As a company that carries out extensive research and development activities, we benefit from the U.K. and U.S. research and development tax credit regimes. In the United Kingdom, we are able to surrender some of our losses for a cash

rebate of up to 26.97% of eligible expenditures on qualifying research and development projects incurred on or after April 1, 2023 (33.35% prior to April 1, 2023). In the United States, we are able to offset the research and development credits against corporation tax payable. Our qualifying expenditures in the United Kingdom largely comprise clinical trial and manufacturing costs, employment costs for relevant staff and consumables incurred as part of research and development projects. In the United Kingdom, where we receive the larger proportion of the research and development credits, certain subcontracted qualifying research and development expenditures are eligible for a cash rebate of up to 17.53% from April 1, 2023 (21.68% prior to April 1, 2023). A large proportion of costs relating to our research and development, clinical trials and manufacturing activities are eligible for inclusion within these tax credit cash rebate claims.
We may not be able to continue to claim research and development tax credits in the United Kingdom in the future under the current research and development tax credit scheme because we may no longer qualify as a R&D-intensive loss-making small or medium-sized company. However, in that scenario, we may be able to file under the merged scheme R&D expenditure credit.
Unsurrendered tax losses are carried forward to be offset against future taxable profits. After accounting for tax credits receivable, we had accumulated tax losses for carry forward in the United Kingdom of £104.2 million as of December 31, 2024. There were also temporary differences on share-based compensation arrangements of £nil.