Compliance Calendar for Different Structures

Missing a tax deadline or neglecting statutory filings isn’t just a paperwork headache—it can mean real penalties, lost business, or even being struck off the register. Every UK business structure comes with its own set of compliance duties, and knowing what’s due, and when, is half the battle. This guide walks you through the annual compliance calendar for sole traders, partnerships, limited companies, and LLPs, with clear explanations, practical tips, and honest warnings about what’s at stake if you slip up. Planning ahead starts here.

The compliance calendar for your business is shaped by your legal structure. Each structure—sole trader, partnership, limited company, or LLP—has unique filing deadlines, reporting duties, and tax obligations. If you get these wrong, it’s more than just a slap on the wrist: HMRC, Companies House, or even your bank can take action. Understanding these differences is the foundation for staying compliant and avoiding surprises. See more about the Pros and Cons of Working for Yourself.

A sole trader operates as an individual, so most compliance centres on Self Assessment and keeping records for HMRC. Partnerships add the complexity of joint responsibility and a partnership tax return. Limited companies and LLPs must answer to both HMRC and Companies House, with strict deadlines around accounts, confirmation statements, and corporation tax. Company directors and LLP members have legal responsibilities, and missing deadlines can mean personal penalties.

It’s not just about taxes, either. Depending on your structure, you may need to register for VAT, run payroll, file for Construction Industry Scheme (CIS) deductions, or meet pension auto-enrolment duties. The right calendar should track everything relevant to your structure, so you don’t get caught out.

• Sole traders: Focus on Self Assessment deadlines and record-keeping.
• Partnerships: Need both individual and partnership returns; joint liability.
• Limited companies: Companies House filings, corporation tax, confirmation statement, and more.
• LLPs: Similar compliance to limited companies, but with different member responsibilities.

Every business in the UK has a rhythm of deadlines. Some are fixed (like the Self Assessment deadline), while others are based on your company’s financial year or VAT quarters. Missing even one can trigger automatic fines or legal trouble, so mapping this out is critical. Here’s what you need to know for each business type.

Sole traders and partnerships centre their year around the Self Assessment calendar. Limited companies and LLPs operate on their own accounting periods, so deadlines are not tied to the tax year but instead to their incorporation anniversary and year-end.

Below is a comparison of the main annual compliance events for each structure. This table should be your reference point when building your own compliance calendar.

• Mark deadlines in your calendar as soon as you register your business.
• Set reminders for at least a month before each filing is due.
• Check if your accountant is handling submissions or if you’re responsible.
• If your accounting year changes, update all your reminders.

While some deadlines are based on your specific year-end, many compliance tasks recur at the same time each year for most small businesses. Here’s a month-by-month guide to the most critical dates, including Self Assessment, VAT, PAYE, Companies House filings, and more.

Remember: If your company’s accounting period doesn’t match the tax year (6 April–5 April), your exact deadlines may shift. Always double-check with Companies House and HMRC based on your specific incorporation date or accounting period.

This outline focuses on the most common compliance events. If you have specific regulatory requirements (e.g. FCA, ICO, HSE), add those to your own calendar.

• Set up alerts at least two weeks before each major deadline.
• Keep digital and paper copies of all filings for at least 6 years (HMRC requirement).
• Review your compliance calendar every quarter for changes.
• If you change accountants, confirm who is responsible for each filing.

For sole traders, compliance is relatively straightforward. You must register for Self Assessment with HMRC by 5 October in your second trading year, then submit your Self Assessment tax return and pay any tax owed by 31 January following the end of the tax year (which runs 6 April to 5 April). If your tax bill is above £1,000, you may need to make Payments on Account—advance payments for the next tax year—by 31 January and 31 July.

Partnerships add an extra layer: the partnership itself must file a partnership tax return (SA800), and each partner must file their own individual Self Assessment return, declaring their share of partnership profits. The partnership return is usually due by 31 January as well, unless you file on paper (then it’s 31 October). All partners are jointly liable for the tax, so if one partner misses a deadline, everyone is affected.

Both sole traders and partnerships must also keep accurate records of income and expenses, ideally in real-time. HMRC requires records to be kept for at least 5 years after the 31 January submission deadline. If you’re VAT-registered, quarterly VAT returns are due, usually a month and 7 days after the end of each VAT period.

• Register for Self Assessment by 5 October if you’ve started trading.
• Submit all required returns by 31 January (online) or 31 October (paper).
• Keep business records for at least 5 years.
• If VAT-registered, file quarterly VAT returns and pay any VAT owed.
• Check if you need to register for Class 2/4 National Insurance.

A common mistake is assuming the partnership doesn’t need its own tax return—HMRC expects a separate SA800 even if all partners file individually. Missing this leads to penalties for every partner, not just the nominated one.

If you employ staff, you must also run payroll using HMRC’s Real Time Information (RTI) system and meet all PAYE deadlines, which are typically monthly. Don’t forget statutory pension auto-enrolment if you employ anyone aged 22 or over earning above £10,000 per year (2026/27 threshold).

Limited companies have more complex compliance duties than sole traders or partnerships. Most deadlines are set by your company’s accounting reference date—usually the end of the month in which the company was incorporated. The main filings are annual accounts, a corporation tax return (CT600), and an annual confirmation statement. Each has its own deadline, often months after your financial year-end, but missing any can lead to automatic penalties and, ultimately, your company being struck off. Learn more about Forming a Limited Company: Steps, Costs, Compliance.

Statutory accounts must be filed with Companies House within 9 months of your year-end (for private companies). The corporation tax return (CT600) and payment of any tax due must reach HMRC within 12 months of your year-end, but the actual tax payment is due 9 months and 1 day after year-end. The annual confirmation statement (formerly the annual return) is due on the anniversary of incorporation, or the previous statement, and confirms key company details.

If you run payroll, you must file monthly Full Payment Submissions (FPS) to HMRC, reporting salaries, PAYE, and National Insurance. If you’re VAT-registered, quarterly VAT returns and payments are due a month and a week after each VAT quarter ends. If you operate in the construction sector, monthly CIS returns may also apply.

• File statutory accounts with Companies House within 9 months of year-end.
• Submit corporation tax return (CT600) to HMRC within 12 months of year-end.
• Pay corporation tax within 9 months and 1 day of year-end.
• File an annual confirmation statement every 12 months.
• File monthly payroll (FPS) and pay PAYE/NICs by 22nd if paying electronically.
• Submit quarterly VAT returns and pay VAT owed by the deadline.

One common pitfall for new directors is misunderstanding the difference between Companies House and HMRC deadlines. For example, your accounts are due to Companies House 9 months after year-end, but your corporation tax is due to HMRC 9 months and 1 day after year-end, and the CT600 return is due 12 months after year-end. Missing any of these means separate penalties from each agency.

If your company changes its accounting reference date, all subsequent deadlines shift. Notify your accountant and update your compliance calendar immediately. Remember, even dormant companies must file annual accounts and a confirmation statement.

LLPs are often misunderstood when it comes to compliance. They share many filing requirements with limited companies—statutory accounts, confirmation statements, and Companies House deadlines—while also needing to submit a partnership tax return (SA800) to HMRC. Each member must file their own Self Assessment return as well.

LLP accounts must be filed at Companies House within 9 months of the year-end. The annual confirmation statement deadline is the anniversary of incorporation or the date of your last statement. The partnership tax return is due to HMRC by 31 January following the tax year, and all members must declare their share of profits individually.

If your LLP is VAT-registered or employs staff, you have the same VAT and PAYE obligations as a company: quarterly VAT returns, monthly payroll filings, and pension auto-enrolment if eligible. It’s important not to assume that LLPs are exempt from any of these duties—Companies House treats LLPs as companies in this regard, and HMRC expects full partnership tax compliance.

• Prepare and file LLP accounts with Companies House within 9 months of year-end.
• Submit the annual confirmation statement on time.
• File the partnership SA800 tax return with HMRC by 31 January.
• Each member must submit a Self Assessment tax return, declaring their share of profits.
• Meet VAT and PAYE obligations if registered or employing staff.
• Keep records for at least 6 years (Companies House and HMRC requirements).

A frequent mistake with LLPs is neglecting the Companies House filing, especially if the LLP is dormant or non-trading. Even if you have zero income, you still need to file accounts and a confirmation statement every year to avoid automatic penalties and possible strike-off.

Beyond annual accounts and tax returns, many UK businesses face other recurring compliance deadlines. The most common are VAT returns (if registered), monthly payroll submissions, and pension auto-enrolment duties. If you work in a regulated industry, you may also have sector-specific filings, such as FCA reports, ICO registration, or health and safety filings.

VAT-registered businesses must file VAT returns every quarter (or annually if on the Annual Accounting Scheme). The standard deadline is 1 month and 7 days after the end of the VAT period. PAYE submissions (Full Payment Submission, or FPS) are due each time you pay employees, and payments for PAYE/NICs must reach HMRC by the 22nd of the following month if paying electronically.

If you employ staff, you must assess eligibility for pension auto-enrolment on each pay run and complete a re-declaration of compliance with The Pensions Regulator every three years. Sector-specific filings vary—ICO registration for data controllers, HSE returns for certain industries, and so on. Always check with your professional body or regulator for any additional obligations.

• Check your turnover monthly to avoid late VAT registration.
• Set payroll reminders for each pay date and PAYE payment deadline.
• Schedule pension re-declaration well before the 3-year anniversary.
• Renew your ICO registration annually if you handle personal data.
• Track any sector-specific reporting and add to your compliance calendar.

Failing to meet these deadlines results in fines, investigations, and even criminal penalties for some offences (e.g. money laundering failures in regulated sectors). Don’t assume your accountant or payroll provider is handling everything—check every month.

For most small businesses, the biggest compliance risk is simply missing a deadline because nobody had it in their diary. Building a custom compliance calendar—one that’s tailored to your business year, structure, and sector—gives you peace of mind and helps you avoid costly mistakes. Here’s how to do it practically.

Start by listing every compliance duty that applies to your structure. Note the exact deadlines for your first year (based on your incorporation or registration date), then set recurring reminders for each subsequent year. Use a digital calendar that syncs to your phone and email, and consider using accounting software with built-in reminders.

Don’t forget to add reminders for tasks that require preparation time, not just the submission deadline. For example, your accountant may need your books 4-6 weeks before accounts are due. Build in buffer periods for all major filings, and assign responsibility for each task (don’t assume someone else is on it).

• Include buffer time for gathering documents and signatures.
• Check for changes in rates and thresholds every April (start of tax year).
• If your company changes year-end, update all related deadlines immediately.
• Share your calendar with anyone involved in compliance (accountant, directors, partners).
• Keep a backup (printed or PDF) in case of tech failures.

A well-maintained compliance calendar is more than a to-do list—it’s your defence against penalties, stress, and loss of business reputation. Treat it as a living document, not a one-off setup.

Despite good intentions, many UK business owners fall into the same compliance traps year after year. The most frequent mistakes are missing deadlines, filing the wrong documents, or assuming someone else is taking care of it. The cost isn’t just financial—repeat failures can lead to HMRC or Companies House investigations, and even being struck off the register.

For sole traders and partnerships, the biggest pitfalls are late Self Assessment returns, forgetting Payments on Account, and not registering for VAT on time. For limited companies and LLPs, it’s mixing up Companies House and HMRC deadlines, missing confirmation statements, or failing to file dormant accounts. Payroll and pension duties are often neglected by those employing their first staff member.

Avoiding these mistakes comes down to proactive planning, clear assignment of responsibility, and using the right tools. Don’t rely on email reminders from HMRC or Companies House—they’re not guaranteed. Build your own system, double-check every deadline, and always confirm who is responsible for each task.

• Don’t assume your accountant is handling everything—ask for a written schedule.
• Mark deadlines for both Companies House and HMRC—they are rarely the same.
• If you delegate, ensure the person responsible understands the deadline and filing process.
• Plan for staff absences—critical filings must not depend on one person.
• Review your calendar every quarter for regulation changes (e.g. tax rates, reporting rules).

One subtle trap: forgetting to update your compliance calendar after a change in business structure (e.g. moving from sole trader to limited company). Your obligations change overnight—don’t carry over the old calendar. See guidance on How to Convert from Sole Trader to Ltd.