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What Documents Do We Need for iXBRL Filing?, explained simply

For most iXBRL filings, start with final or near-final statutory accounts, the tax computation, CT600 data if available and any prior-year iXBRL file for rollover. If something is missing, we can often begin a readiness review, but final filing needs complete approved accounts and filing context.

Core checklist

Core documents checklist

Statutory or annual accounts
Tax computation
CT600 data if available
Prior-year iXBRL file for rollover
Entity details and filing deadline
Entity types

Documents by entity type

AA02 or dormant accounts, company number, year end and confirmation of dormant status.

Micro-entity accounts, balance sheet, notes where included and entity details.

Accounts, basic notes, directors report where applicable and supporting schedules.

Full accounts, all notes, directors report, auditor report if applicable and tax schedules.

Group accounts, subsidiary accounts, consolidation schedules and intercompany support.

IFRS accounts, ESEF context where relevant and supporting review evidence.

LLP accounts, member information, profit allocation and filing context.

SORP-based accounts, trustee report, notes and restricted fund information where relevant.

Incomplete packs

What if my documents are incomplete?

We can start with

  • Draft or near-final accounts
  • Prior-year file
  • Available tax schedules

Needed before filing

  • Approved accounts
  • Confirmed entity details
  • Final filing destination
Secure upload

Secure document upload

Upload through the portal, email intake or a secure link. Files are handled with AES-256 encryption, UK-only processing, ISO 27001-aligned controls and GDPR-aware workflows.

AES-256 UK-only processing ISO 27001 GDPR-aware

Upload through the portal, email intake or a secure link. Files are handled with AES-256 encryption, UK-only processing, ISO 27001-aligned controls and GDPR-aware workflows.

Common questions

What Documents Do We Need for iXBRL Filing? FAQs

No. PDF, Word and Excel source files are commonly used. The most important requirement is that the accounts are complete and approved before final filing.

Yes. Accounts exports from common accounting and tax systems can usually be reviewed and prepared for tagging.

Draft accounts can be reviewed early, but final or near-final accounts reduce rework and are normally required before filing.

We can begin document review without it, but CT600 filing support usually needs the computation before final filing.

It is helpful for rollover and consistency, but not always mandatory.

Yes. The readiness review identifies missing items and separates blockers from items that can follow later.

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