What is a VAT Return?
A VAT return is a form that tells HM Revenue and Customs (HMRC) how much VAT you have charged your customers and how much VAT you have paid on your own business purchases during a given period. The difference between the two determines whether you owe money to HMRC or are owed a repayment.
Every VAT-registered business in the UK must submit a VAT return, even if there is no VAT to declare for that period. A nil return is still required. Missing a return, regardless of whether any tax is owed, carries its own penalties, so understanding the process from start to finish is not optional. It is a basic compliance obligation for every registered business.
This guide walks through the process step by step, covering everything from setting up the right tools to what happens if something goes wrong.
Before You File VAT Return: Know MTD and Compatible Software
In 2026, all VAT-registered businesses, unless HMRC has granted an exemption, in the UK are required to comply with Making Tax Digital for VAT. This means you must keep digital records of your VAT transactions and submit your return using accounting software that is compatible with the MTD system. You cannot submit a paper return unless HMRC has specifically exempted you, for example, on religious grounds or due to a lack of internet access. Submitting a paper return without an exemption can result in a penalty of up to £400.
If you are not already using MTD-compatible software, you will need to set this up before you can file. A wide range of approved software options is available, from full accounting platforms to more basic bridging tools. Once your software is connected to your VAT online account, it will pull together your figures and submit the return directly to HMRC.
If you do not already have a VAT online account, sign in to the HMRC online services portal and set one up using your Government Gateway credentials. Your VAT online account is where you will see when your returns are due, check whether HMRC has received them, and view any penalties on your account.
Step 1: Know Your Deadlines to File VAT Return
Most VAT-registered businesses file quarterly, meaning a VAT return is due every three months. This three-month window is called your accounting period.
The deadline for both submitting your return and paying any VAT owed is one calendar month and seven days after the end of your accounting period. For example, if your accounting period ends on March 31, your deadline to submit and pay is May 7.
Both the submission and the payment must be completed by that same deadline. Payment needs to clear HMRC’s bank account by the deadline, so you should not leave payment to the last day if you are using a slower payment method. You can check your specific due dates at any time through your VAT online account.
If you use the VAT Annual Accounting Scheme, your return is due once a year. The deadline is two months after the end of your annual accounting period, unless that period is less than four months, in which case the return is due one month after the end of the period. Interim payments are made throughout the year under that scheme.
Step 2: Gather Your Records
Before opening your software, make sure you have the following for the accounting period you are filing:
Your total sales figure, meaning the value of everything you sold or supplied, including VAT-exempt and zero-rated supplies. Your total purchases figure, meaning the value of everything you bought for business purposes, including VAT you paid. The amount of VAT you charge on your taxable sales is your output tax. The amount of VAT you paid on your purchases is your input tax. Valid VAT invoices to support every input tax claim you intend to make.
If you have any imports during the period and are using postponed VAT accounting, you will also need your monthly statements for postponed import VAT. These statements are the key record that supports the import VAT entry on your VAT return, and they allow you to declare and reclaim import VAT on the same return rather than paying it upfront at the border.
Step 3: Complete the Nine Boxes of Filing VAT Return
A VAT return has nine boxes. Each one captures a specific figure. Here is what goes in each:
Box 1 is VAT due on your sales and other outputs. This is the total output tax you charged during the period.
Box 2 is VAT due on acquisitions from EU member states into Northern Ireland. This only applies to businesses in Northern Ireland buying goods from EU suppliers.
Box 3 is the total VAT due, which is Box 1 plus Box 2.
Box 4 is the VAT you are reclaiming on purchases and other inputs for the period.
Box 5 is the net VAT to pay to HMRC or reclaim. If Box 3 is higher than Box 4, you owe that difference to HMRC. If Box 4 is higher than Box 3, HMRC owes you a repayment.
Box 6 is the total value of your sales and outputs, excluding VAT.
Box 7 is the total value of your purchases and inputs, excluding VAT.
Box 8 is the total value of goods supplied to EU member states from Northern Ireland, excluding VAT.
Box 9 is the total value of goods acquired from EU member states in Northern Ireland, excluding VAT.
For most businesses operating entirely within Great Britain, Boxes 2, 8, and 9 will be zero. You must still enter a figure; leave no box blank.
One important rule: where you have made a taxable supply and no VAT has been charged separately, HMRC treats the price as VAT-inclusive. This means the VAT element is calculated from what you charged, rather than added on top of it.
VAT Step 4: Submit Your VAT Return Through MTD-Compatible Software
Once your figures are entered and checked, submit the return through your MTD-compatible software. The software will send the data directly to HMRC. You do not need to log into your VAT online account separately; the software handles the transmission.
After submission, you can log in to your VAT online account to confirm that HMRC has received the return. It is worth doing this as a matter of routine, so you have a record that the submission went through successfully.
If you use an accountant or tax agent to manage your VAT, they can submit on your behalf. You can still access your own VAT online account separately, even if an agent is managing the returns.
Step 5: Pay What You Owe
The payment deadline is the same as the submission deadline: one calendar month and seven days after the end of your accounting period. Payment must reach HMRC’s account by that date.
HMRC accepts payment by online banking, bank transfer, debit or corporate credit card, and Direct Debit. Same-day or next-day payment methods are available if you are cutting it close. Some payment methods take longer to clear, so factor that in when choosing how to pay.
If your Box 5 figure shows that HMRC owes you a repayment, you do not need to take any separate action. HMRC will process the repayment once it receives your return. Repayments are normally made to the bank account on your VAT registration record.
How Can Sterling & Wells Accountants Help?
VAT rules are complex, and mistakes can be costly. Our team of certified accountants will ensure your VATÂ returns are accurate, fully compliant with Making Tax Digital, and submitted on time.
What Happens If You File VAT Return Late or Pay Late
For accounting periods starting on or after 1 January 2023, the penalty system works on a points-based model. Each time you submit a return late, including a nil return, you receive one penalty point. The threshold depends on how frequently you file: quarterly filers reach the threshold at 4 points, monthly filers at 5 points, and annual filers at 2 points.Â
Once you reach your threshold, you receive a £200 financial penalty. You will then receive a further £200 penalty for each subsequent late submission while your points remain at or above the threshold.
Once your points reach the threshold, they will not reduce automatically. To clear your penalty points, you need to submit all returns on time for a set compliance period and ensure there are no outstanding returns due in the previous 24 months. The compliance period is 24 months for quarterly and monthly filers, and 12 months for annual filers. Once both conditions are met, HMRC will remove all your points.
Late payment is treated separately. No penalty is charged if you pay in full within 15 days of the due date. If payment remains outstanding after day 15, a first penalty of 3% of the VAT owed at day 15 is charged. If the VAT remains unpaid after day 30, the first penalty increases to 3% at day 15 plus a further 3% of what is still outstanding at day 30. A second penalty then begins to accrue from day 31 at a daily rate of 10% per year on the outstanding balance, continuing until the debt is paid in full. Late payment interest also accrues from the first day the payment is overdue until it is paid in full.
If you are struggling to pay on time, contact HMRC as soon as possible. You can ask HMRC for a Time to Pay arrangement, which allows you to pay your bill in instalments. If HMRC agrees a Time to Pay arrangement within the relevant time window, it can mean lower or no late payment penalties. If the arrangement is agreed before the end of day 15, no late payment penalty applies. If agreed before the end of day 30, the first penalty is limited to 3% at day 15 only. If you do not keep to the terms of the arrangement, HMRC may cancel it and charge penalties as if the arrangement never existed.
Sending an inaccurate return can result in a penalty of up to 100% of any VAT understated or overclaimed, depending on whether the error was careless or deliberate.
Correcting Errors When Filing VAT Return
If you discover an error on a previously filed VAT return, whether you owe HMRC the difference or they owe it to you, you have two options depending on the size of the error.
The first option is to correct the error yourself by adjusting your next VAT return. HMRC allows this when the error falls within the de minimis limit. This limit applies if either of the following is true:
- The net value of the error is £10,000 or less, or
- The net value of the error is between £10,000 and £50,000, but it amounts to less than 1% of the total value of your sales declared in Box 6 for the period in which you discovered the error.
If the error falls within this limit, simply adjust Box 1 or Box 4 on your next return to account for the difference. Keep a clear record of the error, when you discovered it, and the amount involved.
The second option applies where the error exceeds the de minimis limit. This is the case if either of the following is true:
- The net error exceeds £50,000, or
- The net error exceeds £10,000 and represents more than 1% of your total sales.
In these cases, you must notify HMRC separately rather than adjusting your next return. Deliberate errors must always be reported separately to HMRC, regardless of their size.
Finally, there is a time limit on corrections. Errors on returns going back up to four years can be corrected. Any error older than four years is time-barred and cannot be adjusted.
Conclusion
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Filing a VAT return in 2026 is a structured process once you understand what is required at each stage. The key obligations are consistent: keep digital records throughout the period, gather your figures before the deadline, complete all nine boxes accurately, submit through MTD-compatible software, and pay by the same deadline as submission.Â
The penalty system for late submissions and late payments is now more granular than it used to be, which means even a single missed return can start accumulating points on your account. Staying on top of deadlines and having the right software in place removes most of the risk.
If you would like help managing your VAT returns, ensuring your records are MTD-compliant, or understanding how the rules apply to your specific business situation, Sterling & Wells is here to help. Get in touch with our team to discuss how we can take the administrative burden off your hands.
