Turn your accounts into filing-ready iXBRL — tagged right, first time.
We convert statutory accounts and CT600 computations into fully compliant iXBRL, mapped to the correct FRC or IFRS taxonomy, checked by qualified accountants, and ready to file with HMRC and Companies House.
Every route into digital financial reporting, covered
Whether you have one set of micro-entity accounts or a bulk queue from your practice, we tag it to the taxonomy HMRC and Companies House expect.
iXBRL conversion
PDF, Word or Excel accounts converted into a validated iXBRL document, styled to match your original layout.
Full & minimum tagging
Detailed line-by-line tagging for HMRC computations, or minimum-tag accounts for Companies House filing.
CT600 & computations
Corporation tax computations tagged and bundled with your CT600 for direct HMRC online submission.
FRS 102 / FRS 105 / IFRS
Accounts mapped to the correct FRC or IFRS taxonomy element by element — no generic or mismatched tags.
Bulk tagging for firms
Volume pricing and a dedicated workflow for accountancy practices tagging accounts for multiple clients.
Pre-submission review
Independent QA of accounts already tagged in-house — validation, taxonomy checks and error correction.
Software-only filing is coming to Companies House — just not on a fixed date yet
Companies House had set 1 April 2027 as the date every company, LLP and CIC would need to file accounts through commercial software with correctly tagged iXBRL. That date was paused in January 2026 and is under review, with no new date set — but the direction hasn't changed, and HMRC has required iXBRL for Corporation Tax filings since 2011 regardless. Getting tagging right now means nothing to scramble for later, whenever the date lands.
What "minimum tagging" covers
A defined core set of elements — company name, registration number, balance sheet date, key totals — required on every Companies House submission, even for micro-entity accounts.
What "full tagging" covers
Every disclosure, note and comparative figure individually tagged to the taxonomy, required for HMRC computations and for larger or more complex accounts.
Built around how your organisation actually files
Different company types hit different tagging complexity. We've built dedicated approaches for the situations we see most.
Accounting firms
Volume tagging with batch tracking, a named handler, and monthly invoicing.
First filingsStartups
First CT600 and Companies House accounts, done right without founder time.
R&D & SaaSSoftware companies
CT600L R&D claims, deferred revenue, and share scheme disclosures.
From £45Dormant companies
Still a statutory filing — tagged and back to you, usually same day.
SORP & CT600ECharities
Fund accounting, trustees' reports, and charity supplementary pages.
Honest comparisonComparing providers?
How we stack up against FinTags, DataTracks and IRIS — with the trade-offs stated plainly.
From accounts to accepted filing in four steps
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01
Send us your accounts
Upload your PDF, Word or Excel accounts, or your accounting software export, through our secure portal.
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02
We map and tag
A tagging specialist maps every figure to the correct FRC or IFRS taxonomy element, applying full or minimum tagging as required.
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03
Independent review
A second qualified reviewer validates the document against HMRC and Companies House schemas before it leaves us.
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04
You receive filing-ready iXBRL
Download your tagged document, ready to submit yourself or through your existing filing software.
"Our year-end accounts came back tagged and validated well inside 24 hours — no back-and-forth with HMRC over rejected schemas."
"We send iXBRL.UK a batch of client accounts every quarter. Consistent quality, and they flag anything odd before it becomes our problem."
"Straightforward pricing and someone we could actually call when a taxonomy element didn't look right."
Frequently asked questions
Do I need iXBRL for both HMRC and Companies House?
In most cases, yes — CT600 filings to HMRC have required iXBRL since 2011, and Companies House currently accepts several formats. See our who must file guide.
How quickly can you turn around a filing?
Standard turnaround is 24 hours once we have your draft accounts, with an express option available for tighter deadlines.
Do you review the tagging, or is it fully automated?
Every filing is independently reviewed by a second qualified accountant before delivery — never released on automated tagging alone.
How much does tagging cost?
From £45 +VAT for minimum tagging, £95 +VAT for full tagging, and £140 +VAT for CT600 & computations — see our full pricing.
Ready to get your accounts tagged?
Send us your accounts today and get a fixed quote back within one working hour, no obligation.
Request a quote