Tax year dates and deadlines UK 2026
When you’re running a business, there’s no shortage of urgent priorities competing for your attention.
But tax deadlines for things like VAT, PAYE, National Insurance and Corporation Tax aren’t optional.
Missing them can quickly become expensive.
Staying on top of your tax dates isn’t just a legal requirement.
It helps you avoid fines, interest and penalties, and gives you better control over your finances.
When you know what’s due and when, it’s far easier to plan ahead, manage cash flow and make informed decisions throughout the year.
That’s where this guide comes in.
We’ve pulled together all the key UK tax dates and deadlines you need to know, whether you’re self-employed or running small or medium business.
Add them to your diary now and take one more thing off your plate as you head into 2026.
Here’s what we cover:
What date does the tax year start and end?
The personal tax year runs from 6 April to 5 April the following year.
Also known as the fiscal year, this is the period during which any calculations, assessments and financial reporting will be based for individuals and sole traders.
By the end of the period, you’ll need to have your income and expenses in order, ready to submit to HMRC.
The deadline for filing your self-assessment tax return is 31st January following the end of the tax year.
The first time you file, your tax will also be due for payment by the 31st of January.
However, later years are paid in advance, known as ‘payment on account’.
Payments are calculated by taking your bill for the previous year, and paying half that amount on the 31st of January, and half again on the 31st of July.
When your next tax return is calculated, these two payments on account are deducted, and the balance paid to HRMC.
For limited companies it is a little different.
In this case, the tax and reporting deadlines depend on the business year-end.
Your financial statements must be filed with Companies House no later than nine months after the period-end.
Your corporation tax is due for payment nine months and 1 day after your period-end.
Your corporation tax return is due for filing with HMRC 12 months after your period-end.
Here are the key UK tax year deadlines at a glance.
All tax dates and deadlines to know for 2026
Tax year dates for Self Assessment
| 31 January 2026 | Online self-assessment to be submitted following the end of the tax year 2024/25 |
| 31 January 2026 | Deadline for paying tax due for the 2024/25 tax year |
| 31 January 2026 | First payment on account for the 2025/26 tax year |
| 5 April 2026 | End of the 2025/26 tax year (Last chance to claim any overpaid tax from the 2020/21 tax year, as claims for overpaid tax have a four-year limit from the end of the relevant tax year.) |
| 6 April 2026 | Start of the 2026/27 tax year |
| 31 July 2026 | Second payment on account for the 2025/26 tax year |
| 5 October 2026 | Deadline to register for Self Assessment for the 2025/26 tax year |
| 31 October 2026 | Paper self-assessment to be submitted following the end of the tax year 2025/26 |
| 30 December 2026 | Deadline to submit your tax return online to be able to pay your outstanding tax bill through your PAYE tax code if you qualify |
| 31 January 2027 | Online self-assessment to be submitted following the end of the tax year 2025/26 |
Tax year dates for limited companies
| 9 months after your company’s financial year ends | Deadline to submit your annual accounts to Companies House |
| 9 months and 1 day after the company’s financial year ends | Deadline to pay your corporation tax |
| 12 months after the company’s year-end | Deadline to file the company’s CT600 Company tax return |
| 12 months after the company was set up, (or 12 months after the last confirmation statement date) | Deadline to submit the confirmation statement to Companies House |
| 9 months after the company’s financial year ends | Deadline to submit dormant accounts (for companies not actively trading) |
Tax year dates for LLPs
| 31 October following the end of the tax year – paper filing 31 January following the end of the tax year – online filing | Deadline to file your tax return when the partners are individuals |
| 9 months after the end of the corresponding tax period – paper filing 12 months after the end of the corresponding period – online filing | Deadline to file tax returns when there are only corporate partners |
| Every 12 months from the date of the firm’s incorporation or 12 months after the last statement was submitted (You have 14 days to file the confirmation statement after the conclusion of each 12-month period) | Deadline to submit your confirmation statement |
| 9 months after the conclusion of the firm’s financial year (no later) | Deadline to submit the annual accounts to Companies House |
Tax year dates for employers, including PAYE
| No sooner than two months and no later than four weeks before first pay day | New employers register for PAYE |
| On or before each payday (you also need to inform HMRC when you are making the last one of the tax year) | Submit a Full Payment Submission (FPS) |
| Every 19th monthly | PAYE, CIS and NIC payment to HMRC due by post |
| Every 22nd monthly | PAYE, CIS and NIC payment to HMRC due electronically |
| 6 April 2026 | Update employee payroll records for the new tax year |
| 19 April 2026 | Submit the final Employer Payment Summary for the previous year, and pay any tax or National Insurance Contributions (NICs) due |
| 31 May 2026 | Give P60s to employees who were on payroll on the last day of the last tax year |
| 6 July 2026 | Report employee expenses and benefits and submit your P11D and P11D(b) forms |
| 19 July 2026 | Deadline to pay Class 1A NICs by post |
| 22 July 2026 | Deadline to pay Class 1A NICs electronically |
Deadlines for submitting VAT
Value Added Tax (VAT) is a consumption tax, typically charged at the standard rate of 20%, although reduced and zero rates may apply depending on the goods or services.
A registered business collects, holds and then pays this tax to HMRC on a (usually) quarterly basis.
Up to a turnover of £90,000 a business can choose to register for VAT and over this threshold, you are legally required to register for VAT.
At this point, you have 30 days to register.
You may voluntarily choose to register your business for VAT at any time, regardless of your turnover.
Most VAT-registered businesses submit their VAT returns and payments to HMRC on a quarterly basis.
For businesses with a turnover less than £1.35 million, they can elect for the VAT Annual Accounting Scheme to be paid once a year in advance.
The deadline for each VAT return and payment is one month and seven days after the end of the last period.
That means for the period ending 31 March, the return will need to be submitted by, and the payment made before 7 May.
For the period ending 31 December, the deadline would be 7 February the following year, and so on.
Quarterly VAT periods and payment deadlines (an example of)
| Quarter | Period start | Period end | Payment due |
| Q1 | 1 January | 31 March | 7 May |
| Q2 | 1 April | 30 June | 7 August |
| Q3 | 1 July | 30 September | 7 November |
| Q4 | 1 October | 31 December | 7 February |
Does the tax deadline include making payments?
The tax deadlines do not always include making payments.
Usually, there is a deadline to file and then the payment deadline will be on a different date.
For example, self-assessment is paid in advance.
Corporation tax is paid in advance of the filing deadline.
VAT payment is due the same day as the filing deadline and PAYE is paid after the filing deadline.

What should I do if I can’t pay on time?
If you can’t pay on time, for whatever reason, the first step is to contact HMRC to arrange a payment plan.
If you are self-employed and don’t already have an existing payment plan or debts with HMRC, you can do this online, but only if you owe less than £30,000.
You also need to have filed your latest tax return, and be within 60 days of the payment deadline, which is another reason to keep on top of these dates.
If you can’t pay your employer’s PAYE contributions, owe £100,000 or less, do not already have existing debts to HMRC, and have not sent any employers’ PAYE submissions and Construction Industry Scheme (CIS) returns that are due, then there is also an option to set up a payment plan online.
In this case, the criteria are that you plan to pay the debt off within 12 months and do not have any other payment plans or debts with HMRC.
A similar option is available if you owe VAT to HMRC.
This is also possible to do online if you owe £100,000 or less, plan to pay off the debt within the next 12 months and do not have any other payment plans or debts with HMRC.
You also need to have kept on top of your tax returns to date.
If you’re in the Cash Accounting Scheme, Annual Accounting Scheme, or you make payments on account, then an online payment plan is not an option.
If you are unable to set up a payment plan online, speak to HMRC to discuss a realistic proposal for paying your debts. Note that if you are late filing or paying VAT, you accrue penalty points and there is a late payment penalty.
What if I miss the deadline?
If you miss the deadline for submitting or paying your Self Assessment bill, you’ll face a fine of £100 and be charged interest on any late payments.
If you take longer than three months, the fine will start increasing, and the interest will keep accruing.
Limited companies that file accounts to Companies House late are also fined.
In this case, it starts at £150 if the accounts are filed within one month after the deadline.
If you file late but within three months of the deadline, then the fine is £375, and within six months the fine is £750. After that the penalty is £1500.
How do I apply for an extension?
If you’re running a Limited Company and have been affected by events outside of your control, then you can apply to extend your account filing deadline through Companies House.
You have to make an application before the filing deadline passes, so if you are expecting this to be an issue, it’s worth acting sooner rather than later.
Bear in mind that you can’t apply for an extension just because of everyday challenges – the example HMRC gives is a situation such as a fire destroying your company records.
If you’ve got a good reason, you can apply for an extension by post or online via Companies House.
You’ll need to provide an explanation for why you need the extension and ideally provide some evidence and documentation to support it.

What is the first day you can submit tax returns for the previous year?
A tax return for the previous year can be submitted the moment the new tax year starts.
That means you can submit your Self Assessment tax return on the 6th of April.
Should I submit my tax return early?
Submitting your tax return early takes the pressure off when deadlines are approaching.
Instead of rushing to pull everything together at the last minute, you have time to get your accounts in order and make more considered decisions about your finances.
With more breathing room, you can review your allowable expenses properly, which could help reduce your overall tax bill.
Filing early also means you’re more likely to receive any tax refund you’re owed sooner.
It reduces the risk of missing deadlines and facing penalties and frees up your headspace so you can focus on running your business rather than worrying about paperwork.
Early submission also makes financial planning for the year ahead much easier.
The sooner you file, the sooner you’ll know exactly how much tax you need to pay and you’ll have longer to prepare for it.
This can be particularly helpful if you have a larger bill or need to plan for payments on account.
Remember: just because you submit your tax return early, doesn’t mean you have to pay early.

What is Making Tax Digital?
Making Tax Digital (MTD) is a government initiative designed to modernise the UK tax system and make it easier for businesses and individuals to get their tax right.
The aim is to improve accuracy, reduce errors and help taxpayers stay compliant.
Under MTD, businesses and self-employed people must keep their financial records digitally rather than on paper or spreadsheets alone.
They also need to use MTD-compatible software to record their income and expenses and submit information to HMRC.
You’ll be able to see your tax records, liabilities and payments through your HMRC online account, giving you a clearer, up-to-date view of what you owe.
Instead of submitting annual tax returns, taxpayers may be required to send updates to HMRC every quarter, depending on their circumstances.
From April 2019, VAT-registered businesses with a turnover above the VAT threshold (was £85,000 but is now £90,000) were the first to be required to use MTD for VAT returns.
All VAT-registered businesses must now use MTD for VAT.
From April 2026, self-employed individuals and landlords with income over £50,000 must follow MTD for Income Tax Self Assessment (ITSA) and maintain digital records and update HMRC each quarter using compatible software.
From April 2027, this will extend to those with income over £30,000. Corporation tax is still in the planning stages and is not expected to be implemented before 2026.
Final thoughts
Being on top of accounting and payroll means that you have more time to focus on running your business.
Working smarter with payroll software can significantly help in tax and PAYE preparation to make sure you are always ready for deadlines.
FAQs
What are ‘tax weeks’ and ‘tax months’ in the UK?
In the UK, tax weeks and tax months are used by HMRC for payroll and PAYE reporting. They don’t follow the standard calendar months.
The tax year always runs from 6 April to 5 April the following year. From this,
- A tax month runs from 6th of one month to 5th of the next
Each tax year is divided into:
- 52 tax weeks (sometimes 53 in certain years)
- 12 tax months
These periods are used to work out and report income tax and National Insurance for employees, especially where payroll is run weekly or monthly.
For example, tax month 1 runs from 6 April to 5 May, while tax week 1 runs from 6 April to 12 April.
Even if you pay staff on the same calendar date each month, HMRC still bases PAYE calculations on these tax periods.
Understanding tax weeks and months helps you submit accurate payroll information, avoid reporting errors and stay compliant with HMRC deadlines.
Can you file a tax return before the tax year ends?
In most cases, no, you can’t submit a Self Assessment tax return before the tax year has officially ended on 5 April.
That’s because HMRC needs a complete picture of your income, expenses and tax paid for the full tax year before a return can be filed.
Until the tax year closes, some figures, such as final income totals or allowable expenses, may not be accurate.
However, you can prepare in advance.
Many people use the months leading up to the end of the tax year to:
- Gather records and receipts
- Review income and expenses
- Check allowances and reliefs
- Estimate how much tax they’re likely to owe
Once the tax year ends on 5 April, you can submit your Self Assessment tax return straight away.
Filing early gives you more time to plan for any tax due and helps avoid last-minute pressure ahead of the January deadline.
Do VAT deadlines align with tax year dates?
Not usually. VAT deadlines don’t normally follow the UK tax year, which runs from 6 April to 5 April.
Most VAT-registered businesses submit returns quarterly, and their VAT periods are based on the date they registered for VAT, not the tax year.
This means your VAT quarters may start and end at different points in the year.
For example, a typical VAT quarter might run from 1 January to 31 March or 1 February to 30 April, rather than lining up with the tax year.
VAT returns are usually due one month and seven days after the end of each VAT period.
If you use the VAT Annual Accounting Scheme, you’ll submit one return per year instead, but your VAT year still won’t usually match the tax year dates.
Because VAT and tax year deadlines often overlap, it’s important to track them separately.
Knowing when each deadline falls can help you manage cash flow, avoid late submission penalties and stay compliant with HMRC.
Being on top of accounting and payroll means that you have more time to focus on running your business.
Working smarter with accounting and payroll software can significantly help in tax and PAYE preparation to make sure you are always ready for deadlines.
This article was verified by a UK-based Accountant in January 2026. Accounting rules are complex and change frequently and we recommend you seek any accounting advice from a qualified accountant or tax professional.
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