Companies House late-filing penalties are one of the few automatic civil penalties in UK compliance: filed late, penalty issued, end of negotiation in 95% of cases. The 5% where an appeal succeeds tend to share specific characteristics that are worth knowing before you draft the letter. This guide walks through the current penalty bands, the doubling rule, and what an appeal that actually wins looks like.
The current penalty bands
Penalties apply to late delivery of accounts (not confirmation statements - those follow a different enforcement route). The amount depends on how late the accounts are and whether the company is private or public.
- Up to 1 month late: £150 private / £750 public
- 1 to 3 months late: £375 private / £1,500 public
- 3 to 6 months late: £750 private / £3,000 public
- More than 6 months late: £1,500 private / £7,500 public
- Doubled if the previous year's accounts were also filed late
The doubling rule that catches firms out
The doubling provision is the single most expensive trap. If a company files its accounts late in two consecutive years, the second year's penalty doubles automatically. A £1,500 penalty becomes £3,000 with no further explanation needed from Companies House. The doubling resets only when a full year passes with on-time filing.
Practically, this means a single missed deadline triggers two years of risk, not one. Many firms run a "doubled-risk list" of clients whose previous-year accounts went in late, and treat the next deadline as untouchable.
When the penalty is issued
The clock starts on the filing deadline (nine months after the accounting reference date for private companies, six months for public). Companies House issues the penalty automatically once the accounts are received late, or once enough time has elapsed that they can issue against the bracket. The penalty notice is sent to the registered office. Late delivery of amended accounts does not trigger a separate penalty, but late delivery of the original accounts plus failure to file amended accounts can compound the issue under ECCTA's expanded enforcement powers.
What an appeal needs to look like
Appeals are heard by Companies House first. If that fails, the company can apply to the County Court (or Court of Session in Scotland) but at that point legal costs typically exceed the penalty. The first-instance appeal is what matters. The published guidance is clear: appeals succeed only where exceptional and unforeseen circumstances prevented timely filing. That bar is high and is interpreted strictly.
Examples that have succeeded include hospitalisation of the sole director within the filing window, fire or flood destroying records (with evidence), and Companies House system errors documented at the time. Examples that consistently fail include accountant illness, software problems at the firm, postal delays, and "we forgot."
Drafting the appeal letter
A successful appeal letter is short, dated, signed by a director, and accompanied by evidence. State the company number, the penalty notice reference, the deadline, the actual filing date, and the exceptional circumstance. Attach the evidence (hospital discharge letter, insurance claim, system error log) and ask for the penalty to be discharged. Do not include moral arguments about the company's good standing or the impact on the business - they are not relevant to the test Companies House applies.
The firm-side prevention workflow
The only reliable defence is a workflow that surfaces accounts deadlines early enough to act. For a 250-client firm, that means maintaining a deadline register grouped by accounting reference date, with a 90-day, 60-day, 30-day and 14-day touchpoint for each. The 14-day touchpoint is the escalation trigger - anything not delivered to the firm by then needs partner attention.
Accupe's Companies House sync pulls the ARD and accounts filing deadline for every client and surfaces them on Compliance Radar with red-amber-green status. The work is still filed via the firm's preferred accounts software - Accupe does not file accounts to Companies House - but the practice never loses sight of which clients are inside the danger window.
What to do when a client has already been penalised
If the penalty has landed, there are three workstreams. First: pay it within the 14-day discount window if applicable (some historical penalties carried a 10% reduction for prompt payment - check the current notice). Second: assess appeal grounds honestly, and either appeal with evidence or accept the penalty. Third: protect against the doubling rule by guaranteeing on-time filing in the following year. Treat the current year as a controlled compliance project, with weekly check-ins until the accounts are submitted.
Closing
Late-filing penalties are mostly preventable and almost entirely non-negotiable once issued. The doubling rule turns a single slip into a two-year financial exposure. Build the deadline workflow, brief clients clearly on what they need to provide and when, and reserve the appeal route for the genuinely exceptional cases where it has a real chance of success. Everything else is a discipline problem, and disciplines can be designed.