Managing tax deadlines as a UK business owner in 2026 can feel overwhelming, especially when you are balancing quarterly VAT returns and Self Assessment filings alongside running your business.
Missing even one date can lead to penalties, and with new changes like Making Tax Digital 2026 for Income Tax, updated National Minimum Wage rates, and stricter penalty rules, the stakes are higher this year.
According to HMRC data, over £220 million was collected in late filing penalties in 2023, highlighting how common and costly missed deadlines can be. This guide breaks down every key tax, VAT, and payroll deadline you need to track in 2026, so you can stay compliant, avoid penalties, and plan ahead with confidence.
2026 UK Tax Deadlines at a Glance
UK tax deadlines 2026 vary based on individual circumstances. The dates you need to track depend on whether you operate as a sole trader, run a limited company, or manage employees through payroll. Some deadlines are fixed, while others vary depending on your accounting period or filing method.
The table below brings together the key recurring tax, VAT, and payroll deadlines for 2026 UK so you can quickly see what applies to your business and plan ahead with clarity.
| Deadline | Date | Who it applies to |
| Self-Assessment online return (2024/25) | 31 January 2026 | Sole traders, directors, landlords |
| First payment on account | 31 January 2026 | Anyone with a Self Assessment tax bill over £1,000 |
| New tax year begins | 6 April 2026 | All businesses |
| MTD ITSA goes live | 6 April 2026 | Self-employed / landlords earning over £50,000 |
| P60 to employees | 31 May 2026 | All employers |
| Second payment on account | 31 July 2026 | Sole traders with prior year tax bill over £1,000 |
| Paper Self Assessment return (2025/26) | 31 October 2026 | Anyone filing by paper |
| P11D expenses and benefits | 6 July 2026 | All employers with employee benefits |
| Online Self Assessment return (2025/26) | 31 January 2027 | Sole traders, directors, landlords |
| Corporation Tax payment | 9 months + 1 day after year-end | Limited companies |
| CT600 filing | 12 months after year-end | Limited companies |
| Quarterly VAT return and payment | 1 month + 7 days after quarter-end | All VAT-registered businesses |
The following sections provide detailed information about these deadlines, including the specific penalties for missing them.
VAT Return Dates and Payment Deadlines 2026
VAT return dates 2026 are due one month and seven days after the end of each VAT quarter. This means both submission and payment must reach HMRC by that deadline, regardless of your business size or turnover, if you are VAT registered.
Quarterly VAT return schedule 2026
All VAT-registered businesses on the standard scheme must file and pay by the 7th of the second month after each quarter-end. Here are the key dates to plan for:
| VAT quarter end | Submission and payment deadline |
| 31 March 2026 | 7 May 2026 |
| 30 June 2026 | 7 August 2026 |
| 30 September 2026 | 7 November 2026 |
| 31 December 2026 | 7 February 2027 |
If you pay by direct debit, HMRC typically collects three working days after the submission deadline. Annual Accounting Scheme users have different dates, so it is important to check your HMRC VAT online account.
VAT fuel scale charge. New rates from May 2026
If your business reclaims VAT on company car fuel, you will need to apply the updated CO₂-banded fuel scale charge rates from 1 May 2026. HMRC updates these tables annually, so it is important to ensure your accounting software reflects the latest rates to avoid incorrect VAT reporting.
Late VAT payment penalties
Missing a VAT deadline can quickly become expensive. HMRC applies a 2% penalty on the VAT owed after 15 days, increasing to 4% after 30 days, with additional daily interest charges thereafter. Setting a reminder at least two weeks before each deadline gives you enough time to reconcile and avoid last-minute issues.
For businesses that want consistent, accurate VAT submissions without managing the process in-house, our VAT return services handle filing directly with HMRC.
Self-Assessment Deadlines for Sole Traders and Directors
If you are a sole trader, Self Assessment is how you report and pay tax on your business income. If you are a limited company director, your company pays Corporation Tax, but you may still need to file a Self Assessment return for dividends or additional income. Understanding which rules apply to you is essential because many business owners mistakenly assume these obligations are the same.
Key Self Assessment dates
| Deadline | Date | Action Required |
| Register for Self Assessment (new traders) | 5 October 2026 | Notify HMRC if self-employed in 2025/26 for the first time |
| Paper Self Assessment return (2025/26) | 31 October 2026 | File paper return for 2025/26 tax year |
| Online Self Assessment return (2025/26) | 31 January 2027 | File online return and pay any tax owed |
| First payment on account (2026/27) | 31 January 2027 | Advance payment towards next year’s bill |
| Second payment on account (2026/27) | 31 July 2027 | Second advance instalment |
Payments on Account: What Are They and When Do They Apply?
If your last Self Assessment tax bill was over £1,000, HMRC requires you to make advance payments towards the next tax year. These are split into two instalments in January and July, with each payment usually equal to half of your previous year’s tax bill. If your income has dropped, you can apply to reduce these payments, but it is important to be accurate, as HMRC charges interest if you underpay.
Self-Assessment penalty escalation
- Day 1 after deadline: automatic £100 penalty (applies even if no tax is owed)
- After 3 months: £10 per day up to a maximum of £900
- After 6 months: 5% of tax owed or £300, whichever is greater
- After 12 months: a further 5% of tax owed or £300
Appealing a penalty is possible where there is a reasonable excuse, but HMRC sets a high bar for what qualifies.
Payroll and PAYE Deadlines 2026
If you employ staff, payroll comes with two types of deadlines you need to manage. Some are fixed dates, like issuing P60s or submitting P11Ds, while others are ongoing monthly obligations, such as RTI submissions and PAYE payments. Missing either can lead to penalties, so having a clear structure is essential to staying compliant throughout the year.
Fixed payroll deadlines in 2026
| Deadline | Date |
| Final Full Payment Summary (FPS) for 2025/26 | 19 April 2026 |
| PAYE and NIC payment (electronic) | 22nd of each following month |
| PAYE and NIC payment (postal) | 19th of each following month |
| P60 issued to all employees | 31 May 2026 |
| P11D (expenses and benefits) submission | 6 July 2026 |
| Class 1A NIC payment (electronic) | 22 July 2026 |
National Minimum Wage and Statutory Pay increases – April 2026
From April 2026, employers must apply updated wage rates, which directly impact payroll calculations and compliance.
These increases apply across all worker categories:
| Category | New rate from 1 April 2026 | Previous rate |
| National Living Wage (21 and over) | £12.71 per hour | £12.21 |
| Workers aged 18–20 | £10.25 per hour | £10.00 |
| Workers under 18 | £7.55 per hour | £6.40 |
| Apprentice rate | £7.55 per hour | £6.40 |
Payroll software should be updated before the first pay run on or after 1 April 2026 to reflect these new rates.
Statutory Sick Pay – new rules from April 2026
Statutory Sick Pay (SSP) also changes in April 2026, making it more inclusive and easier to administer. The weekly SSP rate increases from £118.75 to £123.25, employees become eligible from day one instead of after three waiting days, and the Lower Earnings Limit is removed, meaning all employees qualify regardless of earnings. This represents a significant shift from previous payroll rules and requires updates to payroll processes.
For employers managing complex payroll obligations, outsourcing payroll services ensures that every RTI submission and payment is processed on time.
Corporation Tax Deadlines for Limited Companies
Corporation Tax deadlines are not tied to the January tax calendar like Self Assessment. Instead, they are based on your company’s financial year-end, which means your deadlines move depending on when your accounting period closes. This is where many directors get caught off guard.
The filing and payment timeline
To make this clear, take a company with a 31 March 2026 year-end. The Corporation Tax payment will be due on 1 January 2027, which is nine months and one day after the year-end. The CT600 return must then be filed by 31 March 2027, exactly 12 months after the accounting period ends.
In practice, it is a good idea to treat the nine-month mark as your real deadline. Setting aside funds and paying on time helps you avoid the risk of using that money elsewhere and scrambling to cover the tax bill later.
Corporation Tax penalty increases from April 2026
From 1 April 2026, Corporation Tax penalties are becoming significantly stricter. The late filing penalty increases from £100 to £200. If your return is still not filed after three months, the penalty rises to £400. For companies that file late three times in a row, penalties can escalate to £2,000.
According to HMRC updates referenced by Moore Thompson, this is the first major increase in Corporation Tax penalties in over 25 years, making timely filing more important than ever.
Companies House also requires annual accounts to be filed nine months after the financial year-end. Missing both deadlines in the same year creates compounding penalties.
Making Tax Digital for Income Tax: Who Is Affected from April 2026
Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is HMRC’s programme to replace the annual Self Assessment return with quarterly digital reporting. From 6 April 2026, self-employed individuals and landlords with qualifying income above £50,000 must keep digital records and submit four quarterly updates to HMRC each year using compatible software.
Who is affected and when
| Income threshold | Mandatory from |
| Over £50,000 (self-employment or rental) | 6 April 2026 |
| Over £30,000 | 6 April 2027 |
| Over £20,000 | 6 April 2028 |
Income from employment (PAYE) does not count towards the threshold. The £50,000 test applies to self-employment and/or rental income only.
What MTD ITSA requires in practice
If you fall within the threshold, your reporting process changes completely. You will need to maintain digital records of income and expenses throughout the year using compatible software. Instead of submitting one annual return, you will send four quarterly updates to HMRC, giving a running summary of your income. At the end of the year, you will then submit a Final Declaration, which replaces the traditional Self Assessment return and confirms your overall tax position.
The MTD soft landing – what does it mean?
To ease the transition, HMRC is introducing a soft landing period for 2026/27. This means you will not receive penalty points for late quarterly updates, as long as they are submitted within one month of the deadline. However, this flexibility does not apply to the Final Declaration, where late filing penalties apply immediately. It also does not cover late payments or inaccuracies, so staying organised from the start is still critical.
Businesses transitioning to MTD-compatible software may want to review our accounting system integration service, which covers migration, setup, and ongoing management across Xero, QuickBooks, and Sage.
Companies House and Corporate Transparency Changes in 2026
If you are a company director, 2026 introduces important compliance changes that go beyond tax deadlines. These updates focus on transparency and accuracy, and they will directly affect how you manage filings and company records.
Stricter filing checks
Companies House is tightening its review process under the Economic Crime and Corporate Transparency Act. This means more scrutiny on submitted documents, potential follow-up queries, and longer processing times. If you are setting up a company or appointing new directors, it is wise to build in extra time to avoid delays.
Mandatory director ID verification
Identity verification for directors and people with significant control (PSCs) will begin rolling out in 2026. You will need to confirm your identity with Companies House to remain compliant. At the same time, HMRC is introducing stricter rules around who can act on behalf of businesses, with only registered agents permitted to handle certain tax matters.
Confirmation statement requirements
Your confirmation statement is still due annually and must be filed within 14 days of your review period end. It is important not to confuse this with your annual accounts, which are due nine months after your financial year-end. Missing either deadline can result in penalties and compliance issues.
How to Avoid Missing an HMRC Deadline This Year
Set up a tax pot from day one:
Each time you receive a payment, move 20–30% into a separate account reserved for tax. This simple habit means that when the self-assessment deadline 2026 in January or the payment-on-account deadlines in July arrive, the funds are already set aside, reducing cash flow pressure and last-minute stress.
Use a digital accounting system before April 2026:
With Making Tax Digital coming into effect, relying on manual tracking will only increase your risk of errors and missed deadlines. Cloud accounting software helps you stay organised with real-time figures, automated reminders, and clearer visibility of what you owe, so you can plan payments in advance.
Build deadlines into your business calendar:
VAT returns follow a fixed pattern, and PAYE payments are due every month. When you map these dates out for the full year, you remove the risk of forgetting them. Treat these deadlines like client commitments, not optional tasks, and align your cash flow planning around them.
Consider outsourcing as your obligations grow:
Managing VAT, PAYE, MTD updates, Self Assessment, and Corporation Tax together can quickly become overwhelming. At that stage, the cost is not just financial but also time and focus. Our flexible engagement models include options for both ongoing compliance support and one-off deadline management, helping you stay compliant without stretching your internal resources.
Frequently Asked Questions
When is the VAT return due for the quarter ending 31 March 2026?
The VAT return and payment for the quarter ending 31 March 2026 are due 7 May 2026. This follows the standard one month plus seven days after quarter-end. HMRC usually collects direct debit payments three working days after the submission deadline. Always verify your dates in your HMRC VAT account.
What is the self-assessment deadline for the 2025/26 tax year?
Online Self Assessment returns for 2025/26 are due 31 January 2027. Paper returns, due 31 October 2026, are earlier. Planning ahead is crucial because missing the January deadline results in a £100 penalty, even if you owe no tax.
What are the payroll deadlines for UK employers in 2026?
As an employer, you need to manage both fixed and monthly deadlines. The final Full Payment Summary for 2025/26 is due by 19 April 2026, P60s must be issued by 31 May 2026, and P11D submissions are due by 6 July 2026. Electronically paid PAYE and National Insurance are due monthly by the 22nd.
When does Making Tax Digital for Income Tax start, and who does it affect?
Income tax digitisation begins on April 6, 2026, for self-employed and landlords earning over £50,000. The threshold drops to £30,000 in April 2027 and £20,000 in April 2028. You must keep digital records and submit quarterly updates using compatible accounting software within these limits.
What happens if I miss the HMRC tax deadlines in 2026?
Depending on the tax, missing a deadline can increase penalties. An immediate £100 fine and daily penalties after three months follow a late Self Assessment return. From April 2026, Corporation Tax late filing penalties rise to £200, while VAT late payments start at 2%. Interest applies.
What is the deadline for paying corporation tax for a limited company?
The CT600 return must be filed within 12 months, while Corporation Tax is due nine months and one day after your company’s accounting period. Your payment and return are due by 1 January 2027 and 31 March 2027, respectively, if your year-end is 31 March 2026. These dates vary by financial year.
What is the national minimum wage from April 2026?
On April 1, 2026, the National Living Wage for workers over 21 rises to £12.71 per hour. Apprentices and those under 18 must earn £7.55 per hour, while 18–20-year-olds must earn £10.25. To comply, update your payroll systems before your first April pay run.
Focus on Your Business. Let Stellarwiz Handle the Deadlines
Keeping track of VAT, PAYE, Self Assessment, and corporation tax deadline 2026 can quickly turn into a full-time job alongside running your business. You don’t have to worry about any of these compliance tasks with Stellarwiz. It takes care of payroll, year-end accounts, and CT600 submissions, as well as making sure your books are ready for MTD and filing your VAT returns.
The first 10 hours are on us, with no commitment required, so you can see how the process works before deciding. You can outsource your accounting with a setup that fits your needs or explore our flexible engagement models for ongoing or one-off support. Book a free consultation via Calendly, or reach out to our team directly if you would rather start with a quick conversation.
