Limited company accountants
Companies House late filing penalties for private limited companies, HMRC penalties for late CT600s, and how to limit the damage.
Written and reviewed by Waqas Sagar Member of ICAEW, Fellow of ACCA, Fellow of AAT, a double graduate and entrepreneur at heart, helping startups grow and serving thousands of businesses nationwide with an excellent team. Published by LimitedCompany.Accountants, 12 London Road, Morden, London SM4 5BQ. Reviewed 12 September 2026 against 2026/27 UK rates and current Companies House and HMRC guidance.
Companies House charges an automatic late filing penalty for private companies, starting at £150 for up to one month late and rising to £1,500 over six months, doubled if accounts were late the previous year. HMRC charges separate penalties for a late CT600, and persistent failure can lead to the company being struck off.
Companies House penalties
HMRC penalties
Companies House charges an automatic late filing penalty for private companies, starting at £150 for up to one month late and rising to £1,500 over six months, doubled if accounts were late the previous year. HMRC charges separate penalties for a late CT600, and persistent failure can lead to the company being struck off.
Private company penalties are £150 (up to one month), £375 (one to three months), £750 (three to six months) and £1,500 (over six months), per GOV.UK. They double when accounts were also late the year before.
A CT600 filed late attracts a £100 penalty, a further £100 after three months, and tax-geared penalties after six and twelve months, plus interest on any late-paid Corporation Tax.
Rates, thresholds and deadlines quoted here reflect the 2026/27 UK position and current Companies House and HMRC guidance. Check GOV.UK, or ask us, before relying on them for your own company.
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We work with company directors across London and Surrey from our office at 12 London Road, Morden, London SM4 5BQ. Pick your area, or send the form below and we will call you back.
Frequently asked
Only with a reasonable excuse such as serious illness or an event outside the company's control. Forgetting or relying on an accountant usually is not accepted.
We need at least 7 working days after receiving all information to complete accounts.
Keep bank statements, sales and platform reports, purchase invoices, payroll records, VAT workings, finance agreements and Companies House correspondence. We confirm the exact list at onboarding and identify gaps before a filing deadline becomes urgent.
The fee depends on transaction volume, record quality, VAT and payroll requirements, historic catch-up and the level of reporting needed. We agree a fixed scope and price before technical work starts, with published packages available on our fees page.
Yes. We request professional clearance, collect the prior records and authorities, check the next Companies House and HMRC deadlines, and give you one clear handover list. The process is normally completed remotely.
Yes. We work through secure cloud records, scheduled reviews and digital approvals, while keeping a named team available by phone, video call and email. Clients can also visit our Morden office by appointment.
We regularly work with Xero, QuickBooks, FreeAgent, Sage and connected sales or expense apps. The right setup depends on transaction volume, integrations and the reports you need, not simply the software brand.
The relevant calendar may include annual accounts, Corporation Tax payment and return dates, confirmation statements, VAT returns, payroll submissions and Self Assessment. We map the dates from your company year end and registrations.
No. This page explains general UK rules and common accounting treatment. Your facts, contracts and wider tax position must be reviewed before you rely on a conclusion.
Included approach
Check the current rules
Deadlines, thresholds and filing rules change. GOV.UK and Companies House publish the current statutory position; advice should then be applied to your company’s circumstances.
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Pick a time that suits you and a qualified accountant will call you about your company, deadlines and fees.
Appointments run monday to friday, 9:00am to 5:30pm. Your confirmation is emailed straight away.
