UK accounts monitoring
Companies House Accounts Filing Monitoring: How to Track Overdue Accounts After Onboarding
A practical guide to Companies House accounts filing monitoring after onboarding, including annual accounts due dates, overdue flags, accepted accounts filings, late-filing penalties, 2028 software-filing changes, and source-backed review workflows.
Short answer
Companies House accounts filing monitoring means tracking annual accounts due dates, overdue flags, accepted accounts filings, and official filing-history evidence for UK companies you already watch. It helps teams spot when a known merchant, supplier, borrower, or customer needs review after onboarding because its public accounts record changed or became overdue.
A company can pass onboarding with its accounts up to date, then later miss an accounts deadline, file accounts after a delay, or publish a new set of accounts that changes the evidence your team last reviewed. For one company, this is easy to check on Companies House. For a portfolio, it needs a repeatable monitoring workflow.
This guide is for fintechs, lenders, KYB products, merchant-risk teams, supplier-risk teams, and B2B platforms that monitor known UK companies after approval. It stays focused on official Companies House records. It is not credit scoring, accounting advice, legal advice, sanctions screening, adverse media monitoring, or a filing service.
Why accounts filing monitoring matters after onboarding
Annual accounts are one of the clearest recurring signals in the UK company record. GOV.UK says private limited companies must prepare annual accounts after the end of the financial year and meet filing deadlines with Companies House and HMRC. The same GOV.UK overview lists a 21-month first-accounts deadline after company registration and a 9-month annual accounts deadline after the company financial year ends for private limited companies.
Companies House guidance also says all UK registered companies must file annual accounts, even if they are dormant or not trading. When accounts are late, the public record can show an overdue state and Companies House can impose automatic late filing penalties.
For customer, merchant, borrower, or supplier monitoring, the useful question is not "can this company file accounts?" It is "did the official record change since we approved this company, and does that change need review?"
What is Companies House accounts filing monitoring?
Companies House accounts filing monitoring is the process of repeatedly checking a known UK company's public accounts status and accounts filings, then turning material changes into source-backed alerts. The monitoring workflow should keep the official company number, the current accounts due date, overdue state, accounting period, latest accepted accounts filing, filing transaction ID, and source URL.
A good monitoring workflow separates three things:
- Deadline state: when the next accounts are due and whether the profile says they are overdue.
- Filing activity: when Companies House accepts an accounts filing and adds it to filing history.
- Review decision: whether your team should look again at the company, based on your own policy and the source evidence.
What official Companies House data can you monitor?
The official record gives enough structured information to build a practical accounts monitoring workflow, but not enough to treat every account as a fully normalized financial dataset. The strongest signals are deadline metadata and filing evidence.
| Field or event | Where it appears | Why it matters |
|---|---|---|
| Next accounts due date | Company profile | Shows the upcoming deadline your review workflow can track. |
| Accounts overdue flag | Company profile | Shows whether the public record currently marks the accounts as overdue. |
| Next accounts period start and end | Company profile | Helps connect the due date to the accounting period being filed. |
| Last accounts type and period | Company profile | Helps reviewers understand what kind of accounts were last accepted. |
| Accepted accounts filing | Filing history | Gives filing date, type, description, transaction ID, and document links when available. |
| Companies House Follow alert | Companies House web service | Useful for manual single-company alerts, but not enough for portfolio workflows by itself. |
The Companies House company profile API documents accounts.next_accounts.due_on, accounts.next_accounts.overdue, and the next accounting-period dates. The filing history API can return a company's filing history and supports a category filter, which lets a monitoring job focus on accounts filings instead of reading every document type with the same priority.
Which accounts changes should trigger review?
Not every accounts-related event deserves the same priority. The useful alert is specific enough that a reviewer can see what changed, when Companies House showed it, and which source evidence supports it.
Accounts due soon
A due-soon alert is useful when your policy needs review before a deadline passes. For example, a lender might want to know when a borrower's next accounts deadline is within 30 days, while a supplier-risk team might only care about overdue accounts.
Accounts overdue
An overdue alert should be treated as a compliance signal, not a final risk verdict. Companies House guidance says accounts can show as overdue after the deadline until they have been examined and accepted. The same guidance says rejected accounts after the deadline can still lead to an automatic late filing penalty.
Accounts filed
A newly accepted accounts filing should update the company's monitoring record and give reviewers a link back to the official filing history or document metadata. This is where teams often need source evidence rather than a vague "filed" label.
Repeated late filing context
Companies House late-filing guidance says penalties can be doubled when accounts are filed late in two successive financial years. A monitoring system should not invent a risk score from that fact, but it can preserve the sequence of overdue and filed events so a human reviewer has the trail.
Accounts monitoring vs confirmation statement monitoring
Annual accounts and confirmation statements are both recurring Companies House obligations, but they answer different review questions. A portfolio workflow should monitor both without merging them into one generic "filing reminder."
| Question | Accounts monitoring | Confirmation statement monitoring |
|---|---|---|
| Main purpose | Track required financial accounts filings and deadline state. | Track the company's regular confirmation that register information is up to date. |
| Useful trigger | Overdue accounts, due soon, or newly filed accounts. | Overdue statement, due soon, early filing, or newly filed CS01. |
| Source fields | Next accounts due, period dates, last accounts, overdue. | Last made up to, next due, next made up to, overdue. |
| Review risk | Accounts may be stale, late, newly accepted, or worth rechecking. | Company details may need a fresh check after a statement event. |
If you need the CS01-specific workflow, read Companies House confirmation statement monitoring. If you need the broader event layer, read company filing monitoring.
How to build an accounts filing monitoring workflow
A reliable workflow should start from official identifiers, not loose company names. It should also keep source evidence with each alert so a reviewer can verify the change without guessing where it came from.
- Resolve the company: store the Companies House company number and canonical company name.
- Snapshot accounts status: keep next due date, period start, period end, overdue state, and last accounts fields from the company profile.
- Poll filing history: fetch accounts filings and store transaction IDs, filing dates, descriptions, and document metadata links when present.
- Classify the change: separate due soon, overdue, filed, and no-material-change states.
- Deduplicate alerts: avoid repeating the same transaction or unchanged overdue state every run.
- Route review items: send only policy-relevant alerts to the team responsible for merchants, suppliers, borrowers, or customers.
- Keep the source trail: show the official URL, observed timestamp, and previous value when possible.
Churnscan's product flow follows the same general pattern: resolve company, confirm ambiguous matches, create a watch, poll official sources, normalize changes, deduplicate signals, and attach source evidence. For the API-level overview, read Company Monitoring API.
What accounts monitoring should not claim
Accounts monitoring is valuable because it is narrow and source-backed. It becomes misleading when it is described as a full financial-risk engine.
- It does not file accounts: filing remains a company or agent responsibility.
- It does not guarantee accepted accounts are complete for your use case: a reviewer may still need to inspect the document.
- It does not prove insolvency: use official insolvency, liquidation, dissolution, and status-change sources for that review.
- It does not replace periodic review: it makes official changes visible between scheduled reviews.
- It does not make every accounts filing urgent: routine filings should be handled differently from overdue or unexpected events.
Why 2028 accounts filing changes make monitoring more important
Companies House announced on 9 June 2026 that accounts filing reforms will come into effect from April 2028. The reforms include commercial software filing for annual accounts, removing the option to file abridged accounts, requiring more complete filing packages, and requiring small companies and micro-entities to file profit and loss accounts while allowing them to opt out of publishing that information publicly.
This does not mean every monitoring workflow should suddenly become a financial-analysis workflow. It does mean accounts metadata, accepted filing events, and filing-route context will become more important for teams that depend on the official register after onboarding.
Practical examples for review teams
Merchant-risk team
A payment provider approved a merchant six months ago. The merchant's accounts were not overdue then, but the current company profile now shows overdue accounts. The alert should link to the company profile evidence and route the merchant to review, without claiming the merchant is insolvent.
Supplier-risk team
A critical supplier files a new set of accounts. The monitoring system records the accounts filing date, transaction ID, and filing-history URL. Procurement can then review the document if the supplier is material to an active contract.
KYB product team
A KYB product already checks a UK company during onboarding. Accounts filing monitoring fills the gap after approval by showing when the official record becomes stale, overdue, or newly updated.
How Churnscan fits
Churnscan monitors official company registry changes after onboarding. For Companies House, that means resolving the right company, watching official records, classifying relevant changes, deduplicating repeated signals, and keeping source evidence attached to each review item.
Accounts filing monitoring fits that scope when it stays tied to official due dates, overdue state, accepted filing events, and source evidence. It should sit beside other post-onboarding alerts such as company status changes, director changes, registered office changes, PSC changes, charges, and confirmation statements.
Monitor Companies House changes after onboarding
Use Churnscan to track source-backed official registry changes for companies you already know. Start from a company list or API workflow, confirm matches, create watches, and review evidence-backed signals.
Frequently asked questions
What is Companies House accounts filing monitoring?
Companies House accounts filing monitoring means tracking annual accounts due dates, overdue state, accepted accounts filings, and filing-history evidence for UK companies after onboarding.
Can Companies House accounts due dates be monitored by API?
Yes. The Companies House company profile resource includes next accounts due date, overdue state, and accounting-period fields. Filing history can also be filtered for accounts filings.
Is an overdue accounts alert the same as a credit-risk decision?
No. An overdue accounts alert is a source-backed compliance signal. It may trigger review, but it does not by itself prove insolvency, fraud, poor credit, or customer churn risk.
Does accounts monitoring replace filing accounts?
No. Monitoring detects the public official record. Filing annual accounts remains the responsibility of the company, its directors, officers, or appointed agents.
What changed for Companies House accounts filing in 2028?
From April 2028, Companies House says all UK registered companies will need to file annual accounts using commercial software, and small companies and micro-entities will need to file profit and loss accounts while being able to opt out of publication.
Sources
- GOV.UK: accounts and tax returns for private limited companies
- GOV.UK: preparing and filing Companies House accounts
- GOV.UK: Companies House late filing penalties
- Companies House Public Data API: company profile resource
- Companies House Public Data API: filing history list
- GOV.UK: searching the Companies House register and Follow service
- Companies House: accounts filing changes from April 2028
- Companies House annual report and accounts 2024 to 2025