TL;DR:
- A UK company compliance checklist outlines mandatory registrations, filings, and duties required by law.
- Maintaining accurate records and meeting deadlines helps prevent penalties, liabilities, and reputational damage.
A UK company compliance checklist is a structured set of mandatory registrations, filings, and governance duties required by law to keep your limited company compliant and operational. For small and medium business owners, missing even one obligation can trigger penalties, damage your credit standing, or expose directors to personal liability. The key regulators you answer to are Companies House, HMRC, and the framework established by the Economic Crime and Corporate Transparency Act 2023 (ECCTA). Getting this right from day one is not optional. It is the foundation on which everything else, including funding, growth, and trust, is built.
What key registrations must a UK limited company complete?
Post-incorporation compliance starts immediately. Many owners assume the clock begins ticking on the day they register with Companies House. It does not. The 3-month Corporation Tax registration deadline starts from the date you begin trading, not the date of incorporation. That distinction trips up a significant number of new directors every year.
The core registrations every UK limited company must complete are:
- Companies House incorporation. Your company is legally registered here. Keep your registered office address and service address accurate at all times.
- HMRC Corporation Tax registration. Register within 3 months of starting to trade. The deadline is tied to trading commencement, not your incorporation date.
- VAT registration. VAT registration is compulsory once your taxable turnover exceeds £90,000. You have 30 days from the point you cross that threshold to register.
- PAYE registration. PAYE registration must happen before the first employee’s payday. Register with HMRC as an employer before you pay anyone.
- Identity verification under ECCTA 2023. Since 18 november 2025, all directors and Persons with Significant Control (PSCs) must verify their identity with Companies House. This is not optional and applies to existing companies, not just new ones.
- Statutory registers. Maintain your registers of members, directors, PSCs, and charges. These must be accurate and available for inspection.
Pro Tip: Record your official trading start date in writing on the day you begin. Send yourself a dated email or note it in your board minutes. This single document protects you if HMRC ever questions your Corporation Tax registration timeline.
What are the main recurring filing obligations for UK companies?
One-off registrations are only the beginning. Ongoing compliance requires you to meet a series of annual and periodic deadlines without fail. Missing these is where most SMEs accumulate penalties.
FilingDeadlineResponsible partyConfirmation Statement (CS01)Every 12 months from incorporation; 14-day grace periodDirector / company secretaryFirst annual accounts21 months after incorporationDirector / accountantSubsequent annual accounts9 months after accounting period endDirector / accountantCorporation Tax return (CT600)12 months after accounting period endDirector / accountantCorporation Tax payment9 months and 1 day after accounting period endDirectorVAT returnQuarterly (if VAT registered)Director / bookkeeperPAYE / payroll submissionsEach pay period (monthly or weekly)Director / payroll provider
The annual Confirmation Statement costs £50 to file online and confirms that your public record at Companies House is accurate. It is not the same as your annual accounts. Confusing the two is a common and costly mistake.
Your first set of annual accounts is due 21 months after incorporation. After that, the deadline tightens to 9 months after your accounting period ends. Missing accounts filings results in automatic penalties that increase the longer you delay. Companies House does not send reminders as a matter of course, so you must track these dates yourself or use an accountant who does.
If your business provides online services accessible to children, a separate obligation applies. Businesses accessible to children online have three months from launch to complete a mandatory children’s risk assessment under online safety law. You can find practical guidance on meeting this requirement through resources covering digital privacy compliance for UK services.
Which duties must directors fulfil to maintain compliance?
Directors carry the heaviest compliance burden. Directors have specific legal duties under the Companies Act 2006, and those duties are owed to the company itself, not to shareholders or customers. Breaching them can result in personal liability, disqualification, or criminal prosecution.
The key director and operational duties are:
- Statutory registers. Keep your registers of members, directors, and PSCs current. Failure to keep statutory registers accurate is one of the most common compliance mistakes and attracts penalties.
- Employers’ liability insurance. If you employ staff, you must hold a minimum of £5 million in employers’ liability cover. This is a legal requirement, not a recommendation.
- Employment law. Issue written contracts to all employees from day one. Operate payroll correctly and assess IR35 status for any contractors you engage.
- Data protection. Register with the Information Commissioner’s Office (ICO) if you process personal data. Apply UK GDPR principles to how you collect, store, and use customer and employee data.
- Health and safety. Even a small office-based business must carry out a basic risk assessment and have a written health and safety policy if you employ five or more people.
- Consumer Rights Act 2018. Maintain clear terms and conditions, refund policies, and pricing information. Customers have statutory rights you cannot contract out of.
Pro Tip: Treat governance as a core business function, not paperwork. Schedule a quarterly compliance review in your calendar the same way you would a board meeting. Thirty minutes every quarter prevents months of remediation work later.
How do you avoid common compliance mistakes?
The most damaging compliance errors are not dramatic. They are quiet, administrative, and entirely avoidable. The single most common mistake is misunderstanding when the Corporation Tax registration clock starts. Many directors register months late because they count from incorporation rather than from the date they first traded.
Follow these steps to keep your compliance on track:
- Document your trading start date on day one and store it with your company records.
- Set calendar reminders for every filing deadline at least 60 days in advance.
- Verify PSC information quarterly. An incomplete or inaccurate PSC register is a frequent compliance pitfall that Companies House actively scrutinises.
- Reconcile your VAT position monthly, even if you file quarterly. Crossing the £90,000 threshold mid-year without noticing is more common than you would expect.
- Keep board minutes. Record every significant decision. If a director’s duty is ever questioned, minutes are your primary evidence.
- Review your statutory registers at least twice a year. Changes in shareholding, directors, or PSCs must be notified to Companies House promptly.
- Get professional advice when your situation changes. Hiring your first employee, taking on investment, or changing your accounting period each triggers new obligations.
Compliance involves multiple laws and regulators, and SME owners who try to manage everything alone frequently miss sector-specific requirements. The cost of professional advice is almost always lower than the cost of a penalty or a missed tax deadline.
Pro Tip: Use cloud accounting software such as Xero to automate VAT calculations and payroll submissions. Automation does not replace professional oversight, but it eliminates the manual errors that cause most late filings.
Key takeaways
A UK company compliance checklist covers registrations, recurring filings, and director duties that together determine whether your business stays legally operational and penalty-free.
PointDetailsCorporation Tax registration timingRegister with HMRC within 3 months of trading, not incorporation.VAT threshold and deadlineRegister within 30 days of your taxable turnover exceeding £90,000.Annual filing deadlinesFile your Confirmation Statement yearly and accounts within 9 or 21 months depending on your stage.Director identity verificationAll directors and PSCs must verify identity with Companies House since november 2025 under ECCTA 2023.Governance as a business functionQuarterly compliance reviews prevent penalties and protect directors from personal liability.
Compliance is a growth asset, not a burden
Most SME owners I work with treat compliance as a cost centre. I understand why. The filing deadlines, the register updates, the PAYE submissions. It feels like administrative friction that slows you down. But I have seen the opposite play out repeatedly with clients at Priceandaccountants.
The companies that maintain clean compliance records attract investment faster. Tax compliance builds credibility and funding potential in ways that a polished pitch deck simply cannot replicate. When a VC or angel investor runs due diligence, the first thing they check is your Companies House record and your HMRC standing. A missed Confirmation Statement or a late Corporation Tax return raises immediate red flags.
The ECCTA 2023 changes, particularly the identity verification requirements for directors and PSCs, signal a clear direction from government. Transparency is increasing, not decreasing. Directors who treat governance as an afterthought will find themselves personally exposed in ways that were less likely five years ago. I have seen directors face disqualification proceedings over record-keeping failures that could have been resolved with a single afternoon of attention.
My honest advice is this: build your compliance calendar before you build your marketing plan. The business that is clean, transparent, and well-governed is the one that scales. The one that cuts corners on filings is the one that stalls at the worst possible moment.
— Rahamut
How Priceandaccountants helps UK SMEs stay compliant
Running a business is demanding enough without tracking every filing deadline and regulatory update yourself.
Priceandaccountants works with UK small and medium businesses to handle the full range of compliance obligations, from bookkeeping and VAT returns to Corporation Tax filings and director governance support. Our team understands the specific pressures that SME owners face, particularly around HMRC deadlines, Companies House requirements, and the evolving obligations introduced by ECCTA 2023. We also provide expert accounting services tailored to growing businesses that need more than a basic filing service. If you want to get your compliance in order and keep it that way, speak to the team at Priceandaccountants today.
FAQ
What is a UK company compliance checklist?
A UK company compliance checklist is a structured list of legal registrations, filing deadlines, and governance duties that a limited company must complete to remain compliant with Companies House, HMRC, and applicable UK law.
When must a UK company register for Corporation Tax?
A UK company must register for Corporation Tax with HMRC within 3 months of starting to trade. The deadline runs from the trading start date, not the date of incorporation.
What is the VAT registration threshold in the UK?
VAT registration becomes compulsory once your taxable turnover exceeds £90,000. You have 30 days from crossing that threshold to register with HMRC.
What happens if a director fails to meet their legal duties?
Directors who breach their duties under the Companies Act 2006 can face personal liability, financial penalties, or disqualification from acting as a director. Keeping accurate statutory registers and filing on time are the most direct protections.
How often must a UK company file a Confirmation Statement?
A UK company must file a Confirmation Statement with Companies House every 12 months. The online filing fee is £50, and there is a 14-day grace period after the due date.