Compliance with UK VAT rules depends on the timely and accurate submission of your transaction data. Missing deadlines or submitting incorrect data can result in additional hellotax processing fees, as well as potential HMRC penalties, interest and compliance complications.

This article explains the key hellotax data deadlines, official HMRC deadlines, why they matter and what can happen if deadlines are missed.

✅ Key Data Deadlines in the UK

All transaction data must be uploaded to your hellotax software account — never sent by email — to ensure accurate VAT filings.

Quarterly VAT Filing

Quarterly VAT returns are common in the UK.

• Data upload to hellotax: By the 4th of the month following the end of the VAT period
  • Example: VAT period ending 31 March → upload by 4 April
• Official HMRC filing deadline: Generally 1 calendar month and 7 days after the end of the VAT accounting period
• VAT payment deadline: Generally the same as the filing deadline

For example:

VAT period ending 31 March → VAT return and payment generally due by 7 May.

Monthly VAT Filing

Where a business has monthly VAT periods:

• Data upload to hellotax: By the 4th of the following month
• Official HMRC filing deadline: Generally 1 calendar month and 7 days after the end of the VAT accounting period
• VAT payment deadline: Generally the same as the filing deadline

⚠️ Individual businesses may have different VAT accounting arrangements. Always follow the VAT period and deadlines applicable to your registration.

⚠️ hellotax requires data by the 4th of the month to ensure VAT returns can be prepared and submitted on time in line with HMRC deadlines.

⚠️ Why Meeting Deadlines Matters

Submitting your data on time helps ensure:

• Accurate VAT filings — all sales, refunds, returns and other relevant transactions are included
• Efficient automated processing — the hellotax system relies on uploaded data
• VAT returns can be prepared before the HMRC deadline
• Complete and accurate compliance records
• Reduced risk of HMRC penalties and late-payment interest

❌ Consequences of Late or Missing Data

Late uploads to hellotax – after the 4th

If your data is uploaded after the hellotax deadline:

• Automatic filing may no longer be possible
• Manual processing may be required by hellotax
• A €119 hellotax manual processing fee applies for each affected filing

Important: The €119 fee is a hellotax service fee for manual processing. It is not an HMRC penalty or charge. Any HMRC penalties or interest resulting from late submission or payment are separate.

Missing data – not uploaded at all

If the required data is not provided, hellotax may be unable to prepare and submit your VAT return correctly and on time.

HMRC operates separate systems for late submission and late payment.

Late Submission

Late VAT returns can result in penalty points.

Once the applicable points threshold is reached, a financial penalty may be imposed. The threshold depends on how frequently the business is required to submit VAT returns.

Late Payment

Late-payment interest is charged from the first day the VAT payment is overdue.

A late-payment penalty can apply if the payment remains unpaid after 15 days.

The amount of any late-payment penalty will depend on the circumstances and how long the VAT remains outstanding.

Repeated non-compliance can therefore result in increasing costs and additional interaction with HMRC.

💡 Best Practices to Stay Compliant

• Upload early: Ideally between the 1st–3rd of the month
• Use integrations: Connect supported marketplaces and webshops where available
• Do not send data by email: Always upload through your hellotax account
• Check completeness: Include refunds, returns, manual orders and stock movements where applicable
• Review alerts: Resolve missing or incorrect information promptly
• Forward HMRC letters immediately: Send any communication from HMRC to your Account Manager

🤝 How hellotax Supports You

hellotax provides:

• Automated checks for missing or incomplete data
• Alerts for integration or upload issues
• Clear visibility of deadlines in your dashboard
• Manual processing support if the hellotax data deadline is missed, subject to the applicable hellotax service fee
• Storage of filings and relevant confirmations
• Support from your hellotax Account Manager

📌 Summary of Deadlines and Responsibilities

Remember: the hellotax data-upload deadline and the official HMRC VAT deadline are not the same thing.

The 4th of the month is the hellotax deadline for receiving your data so that we have sufficient time to prepare your filing. The later HMRC deadline is the statutory deadline for submitting the VAT return and making the VAT payment.

Meeting these deadlines is your responsibility, but hellotax provides the tools, support and guidance to help you maintain your UK VAT compliance.