iXBRL tagging services for every filing route
From a single set of micro-entity accounts to a bulk queue for your practice, we tag your figures to the exact taxonomy element HMRC and Companies House expect — reviewed by a second qualified accountant before it reaches you.
iXBRL conversion
Send us your accounts as a PDF, Word document, Excel workbook, or an export from your accounting software. We rebuild the document as valid iXBRL — an HTML file with XBRL tags embedded inline — so it reads exactly like your original statutory accounts to a human, and like structured data to HMRC and Companies House.
- Layout and formatting preserved, including notes, schedules and signatures
- Works from PDF, Word, Excel, or software-generated drafts
- Output validated against the current FRC and HMRC schemas before delivery
24–48 hours
Same-day options available for urgent CT600 deadlines.
HMRC computations & complex accounts
Any set of accounts where every note and comparative figure needs to be machine-readable.
Full iXBRL tagging
Every figure in the accounts — primary statements, notes, accounting policies and comparatives — is individually mapped to the correct element in the UK GAAP, FRS 101/102/105 or IFRS taxonomy. This is the standard HMRC requires for Corporation Tax computations, and the level larger or more complex companies need for Companies House filing.
- Element-by-element mapping, not automated best-guess tagging
- Correct context, dimension and unit applied to every fact
- Consistent tag reuse across primary statements and notes
Minimum iXBRL tagging
For Companies House filing, a defined core set of elements must be tagged even where the rest of the document isn't: company name and number, balance sheet date, and key primary statement totals. It's a lighter-touch service, common for micro-entity and small company accounts, and priced accordingly.
- Meets the Companies House minimum tagging list in full
- Suited to micro-entity and small company abridged accounts
- Fast turnaround — most jobs same day
Companies House filing
Micro-entity and small company accounts that don't require full HMRC-level tagging.
Your CT600 return
Delivered ready to attach as the accounts and computations schedule.
CT600 & tax computation tagging
HMRC has required iXBRL for Corporation Tax return attachments since 2011. We tag both your statutory accounts and your tax computations to the correct taxonomy, so the pair can be attached to your CT600 and submitted online without a schema rejection.
- Accounts and computations tagged as a matched pair
- Checked against current HMRC validation rules before delivery
- Works alongside your existing tax software or agent
Bulk tagging for accountancy firms
If you're a practice tagging accounts for multiple clients each filing season, we run a dedicated workflow: a single upload portal, per-client status tracking, consistent tagging conventions across the batch, and volume pricing that comes down the more you send.
- Volume-tiered pricing, invoiced monthly or per batch
- Named account handler for your practice
- API and secure bulk-upload options for high-volume firms
Chartered & certified practices
Consistent output your reviewers can sign off quickly, batch after batch.
Second-reviewer QA
A fresh set of eyes on tagging done anywhere, before it goes near HMRC or Companies House.
Pre-submission review
Already tagged your own accounts, or had them tagged elsewhere? We'll independently validate the document against the current HMRC and Companies House schemas, check taxonomy element selection, and flag anything likely to trigger a rejection — before you submit.
- Full schema and taxonomy validation report
- Line-by-line check of element selection against source figures
- Corrections made and re-validated on request
Taxonomies & frameworks we tag against
FRS 102
UK GAAP standard for most private limited companies.
FRS 105
Micro-entity regime, simplified disclosure set.
FRS 101
Reduced disclosure framework for qualifying subsidiaries.
IFRS
Full IFRS taxonomy for groups reporting under international standards.
Tell us which service you need
Not sure whether you need full or minimum tagging? Send us your accounts and we'll tell you — free of charge, before you commit to anything.
Get a free quoteFrequently asked questions
Do you offer a free assessment of which tier we need?
Yes — send your accounts over and we'll tell you whether minimum or full tagging applies, and quote a fixed price, before you commit to anything.
Can one service cover both CT600 and Companies House filings?
Yes — our CT600 & computations package covers both documents where they need tagging together; ask us to confirm scope for your specific filing.
Do you tag accounts prepared under IFRS as well as UK GAAP?
Yes — we tag against FRS 101, 102, 105, and full IFRS, depending on which framework your accounts are prepared under.