Enter your accounting period end date. We'll calculate all three statutory deadlines instantly.
CT600 + iXBRL accounts due 12 months after period end
Late penalty: £100 (1 day late) to £500+ (6 months)
Accounts due 9 months (private) or 6 months (public) after period end
Late penalty: £150 to £7,500 (depends on delay + company size)
Listed companies: 4 months after year-end (ESEF format)
FCA enforcement: Suspension notice + public censure
Accounting period closes
4 months (listed co.)
9 months (private)
12 months
Most companies wait until HMRC deadline (12 months) to file. But filing earlier means peace of mind. We can submit to all three regulators in one go—typically on your Companies House deadline (9 months).
Urgent turnaround available. Additional fees apply based on complexity.
Included in base price. For non-urgent filings with 2+ weeks to deadline.
For deadlines 7-14 days away. Most popular rush option.
Next-day delivery. For deadlines 2-7 days away. Subject to availability.
Emergency only. For deadline today or tomorrow. Call to confirm capacity.
If we can't meet the rush deadline (rare), we refund the rush fee only—not the base service fee. Always book with buffer time where possible.
HMRC and Companies House penalties stack up fast. Here's what you'll pay if you miss deadlines.
Avoid Penalties—Start NowAutomatic penalty. No exceptions even if tax paid on time.
Additional £100 on top of initial penalty.
£200 fixed + 10% of tax due (or £500 if greater). Plus daily penalties at 12 months.
Scales up: £375 (3 months), £750 (6 months), £1,500 (12+ months).
5x higher penalties for PLCs. Plus potential prosecution of directors.
HMRC: £100 automatic penalty—no discretion. Companies House: Same, £150 penalty triggered immediately. File ASAP to prevent higher bands. We can still help with "late but not too late" filings to minimize damage.
HMRC: No formal extensions, but you can appeal penalty if "reasonable excuse" (e.g., serious illness, fire, flood). Companies House: Can apply for 3-month extension online before deadline (AA01 form, £10 fee). Max 1 extension per year. We can help with extension applications if needed.
Yes! If deadline falls on weekend or UK bank holiday, it rolls to next working day. Example: 31 Dec 2025 is Wed (working day), so no extension. But if 31 Mar 2026 were a Sunday, deadline becomes 1 Apr 2026. We account for this in our calculator.
HMRC usually waives penalties for "system outage" days if you can prove you attempted to file. We screenshot all submission attempts with timestamps as evidence. Companies House has similar policy. Pro tip: Don't wait until deadline day—we always aim for 48-hour buffer minimum.
Not advisable. You can't amend CT600 after submission (would need full superseding return). Accounts can be amended but it's hassle. We recommend filing after audit sign-off (if applicable) or at minimum after management accounts are finalized. Rush filings often happen because people wait too long, not because they filed early drafts.
Book your filing now. Get automatic deadline tracking. Sleep easy knowing you're covered.
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