R&D tax credits and CT600: what are the changes? 

R&D tax credit calculations will play a larger role in a company’s CT600, requiring advisers to publish even more information for HMRC scrutiny.

From April 2021, all companies submitting an R&D tax credit claim will be required by law to complete a supplementary page (CT600L) when completing their corporation tax self-assessment, or indeed when making an amendment.  This will apply to companies under both the SME and RDEC tax reliefs.

Matthew Jones, managing director of LimestoneGrey, commented:

‘This is a welcomed addition to the R&D tax credit process. It will provide greater transparency for HMRC and will allow them to further crackdown on unjustifiable claims. A draft CT600L can be found by clicking the link below: