Annual accounts are not optional, and Companies House does not negotiate. Miss the deadline by one day and the penalty starts; miss by three months and it doubles; miss by six and it can hit £7,500 for a public company. More importantly, late filing is one of the fastest routes to a strike-off notice and the personal director disqualification regime that can follow.
The good news: meeting your filing obligations is entirely a process problem. Here is the checklist we use for every client.
Understanding your two deadlines
UK companies have two distinct filing obligations and they do not have the same deadline:
- Companies House (statutory accounts): 9 months after your accounting reference date for private companies, 6 months for public companies.
- HMRC (corporation tax return — CT600): 12 months after your accounting reference date, but the corporation tax itself is payable 9 months and 1 day after.
The mismatch trips people up. You can be on time for Companies House and late for HMRC's payment deadline, or vice versa. Manage them as two separate workstreams.
The penalty escalator
For private limited companies, Companies House late filing penalties are:
- Up to 1 month late: £150
- 1 to 3 months late: £375
- 3 to 6 months late: £750
- More than 6 months late: £1,500
All figures double if you also filed late the previous year. Two consecutive late filings at 6+ months is £3,000 for a private company and £15,000 for a public company. There is no discretion. The penalty is automatic and almost never waived.
The 9-month workflow
Month -9 (year-end approaches)
- Confirm accounting reference date in Companies House records
- Lock down stocktake date and process
- Brief department heads on accruals and prepayments cut-off
- Confirm with your accountant whether a statutory audit is required (size thresholds: >£10.2m turnover, >£5.1m balance sheet total, >50 employees — meet 2 of 3 for 2 consecutive years)
Month -6 (3 months past year-end)
- Trial balance reviewed and closed
- Stock count reconciled and adjustments posted
- Accruals, prepayments, and deferred income posted
- Fixed asset register reconciled, depreciation reviewed
- Intercompany balances agreed (if applicable)
- Bank reconciliations cleared
- Draft accounts circulated to directors
Month -3 (6 months past year-end)
- Final accounts signed by directors
- iXBRL tagging completed
- Confirmation statement reviewed (separate filing — do not confuse with accounts)
- PSC register updated and reflected in confirmation statement
Month -1
- Accounts filed at Companies House — keep submission confirmation
- Confirmation statement filed if due
- Corporation tax computation finalised
The five things that cause late filings
- Stocktake disputes at year-end. Resolve the methodology in writing before the count, not after.
- Missing accruals. Train department heads to flag commitments that cross year-end.
- Bank reconciliation gaps from un-cleared payments or FX accounts.
- Director unavailability. Get a draft signed-off date in directors' diaries by month 6.
- Last-minute change in the audit/no-audit decision. Confirm this at the planning stage.
If you have already missed the deadline
File anyway — every additional month costs more. Then file a written appeal on the basis of any genuinely exceptional circumstance (serious illness, bereavement, system failure documented at the time). Cashflow is not exceptional. "We were busy" is not exceptional. Be honest about whether you have grounds before drafting.
How we keep clients on track
Every annual accounts client gets a written timetable at the start of each accounting period, with calendar invites for each milestone. Late filings on our watch are vanishingly rare — and when they happen, it is usually a client who has gone silent for three months. Stay engaged with your accountant in the first six months after year-end and the last three months take care of themselves.
If you want us to take responsibility for your annual filing cycle, get in touch and we will scope it within 48 hours.