How to Convert PDF to XBRL (iXBRL): Guide for UK Companies
Why Convert PDF to XBRL?
UK companies must file annual accounts with Companies House and HMRC in XBRL (iXBRL) format. A PDF alone is no longer accepted. Converting PDF to XBRL makes your financial data machine-readable and compliant with UK law.
What Is XBRL / iXBRL?
XBRL (eXtensible Business Reporting Language) is the global standard for exchanging business information. iXBRL (Inline XBRL) is a hybrid format used in the UK that combines human-readable HTML with machine-readable XBRL tags.
How to Convert PDF to iXBRL: 3 Methods
Method 1: Use iXBRL Tagging Software (Recommended)
Upload your PDF to software like QuickXBRL, and the platform guides you through tagging each number. Most tools export directly to iXBRL.
Method 2: Convert PDF to Excel First, Then to iXBRL
Extract tables from PDF into Excel, then use an Excel-to-iXBRL converter. This gives you more control over tagging.
Method 3: Professional Conversion Services
If you have complex accounts, hire an iXBRL conversion service. They handle tagging and validation.
Best PDF to iXBRL Tools in 2026
| Tool | Best For | Difficulty |
|---|---|---|
| QuickXBRL | Small businesses | Easy |
| IRIS | Accountants | Medium |
| Taxfiler | Low cost | Easy |
| DigiAccounts | Bulk filing | Medium |
Common Mistakes When Converting PDF to iXBRL
- Forgetting to tag all numbers – Every monetary value needs a tag.
- Using wrong taxonomies – UK GAAP, IFRS, or FRS 102?
- Skipping validation – Always run the iXBRL validator before filing.
FAQ
A: Free tools exist but often lack full taxonomy support. For HMRC filing, use a paid tool.
A: No. Since 2011, most UK companies must file iXBRL.
A: 10–30 minutes for small accounts with automatic tagging software.