iXBRL (Inline Extensible Business Reporting Language) is a digital tagging standard required by HMRC and Irish Revenue, embedding machine-readable tags into financial statements so the data can be processed automatically as well as read by humans. Tagging doesn't change what a business reports, only how the financial statements are marked up before submission. Businesses filing a corporation tax return in the UK or Ireland must submit tagged financial statements alongside that return.

ARKK's UK-based team tags your financial statements using regulator-recognised software, applying the correct taxonomy to each account before testing and validating the output. You review the tagged files before they're submitted, with turnaround available in as little as one day when deadlines are tight.

Standard turnaround is typically around 15 days from when files and account details are submitted, followed by a review period of up to four weeks for amendments. Faster turnaround, including same-day tagging, is available for businesses facing an imminent deadline. 

Files are uploaded and managed through ARKK's ISO 27001-certified cloud-based portal, the internationally recognised standard for information security management. This gives you a single, secure destination for uploading, tracking, and accessing your tagged files throughout the process. 

Incorrect or incomplete tagging can result in a rejected submission, creating delays at a time when filing windows are already tight. Keeping up with periodic taxonomy updates also requires specialist knowledge, and errors are harder to catch without expert review before submission.