Form VAT100 is the statutory return required under Regulation 25 of the Value Added Tax Regulations 1995 (SI 1995/2518). Every VAT-registered entity in the UK must submit periodic VAT returns (typically quarterly) accounting for all output tax collected on sales and input tax incurred on allowable purchases.
Under Making Tax Digital for VAT (mandated for all VAT-registered entities regardless of turnover), the manual filing of returns is obsolete. Taxpayers must maintain unbroken digital audit trails from primary invoices through to HMRC's central servers.
The Statutory 9-Box Architecture
The UK VAT return is condensed into nine statutory figures that reflect the entire transactional volume of your business over the accounting period:
| Box Number | Statutory Field | Legal Description |
|---|---|---|
| Box 1 | VAT due on sales and other outputs | Total VAT charged on goods and services supplied to customers in the UK |
| Box 2 | VAT due on acquisitions from EU / Reverse Charge | Statutory VAT payable under reverse charge mechanisms on imported services |
| Box 3 | Total VAT due | Box 1 + Box 2 (The gross statutory debt owed to the Crown) |
| Box 4 | VAT reclaimed on purchases and inputs | Allowable input tax paid on legitimate business expenses and raw materials |
| Box 5 | Net VAT to be paid to HMRC or reclaimed | Box 3 − Box 4. If positive, you pay HMRC; if negative, HMRC refunds you |
| Box 6 | Total value of sales excluding VAT | Net turnover from all taxable sales, zero-rated sales, and exports |
| Box 7 | Total value of purchases excluding VAT | Net cost of all business purchases and expenses excluding VAT |
| Box 8 | Total value of goods supplied to EU | Sales of goods to EU member states (under Northern Ireland Protocol rules) |
| Box 9 | Total value of goods acquired from EU | Purchases of goods from EU member states (under Northern Ireland Protocol) |
The Statutory Deadline: 1 Month and 7 Days
Under UK VAT law, the deadline for submitting the return and paying the liability in full is identical: 1 calendar month and 7 days following the end of your VAT quarter:
- Quarter ending 31 March: Due by 7 May
- Quarter ending 30 June: Due by 7 August
- Quarter ending 30 September: Due by 7 November
- Quarter ending 31 December: Due by 7 February
The Direct Debit Advantage
If you set up an active Direct Debit mandate with HMRC, HMRC automatically collects payment from your bank account three working days after the 7th of the month. This ensures you never miss a payment deadline or trigger automated interest charges.
The Reformed Two-Tier Penalty Regime
The old Default Surcharge regime was replaced by a modern, fair, two-tier system under Schedules 24 and 26 to the Finance Act 2021:
1. Late Submission Penalties (Points-Based System)
- Every late return awards 1 penalty point.
- Quarterly filers have a statutory threshold of 4 points.
- When you hit 4 points, HMRC issues an automatic £200 penalty.
- Any subsequent late return while at 4 points triggers another immediate £200 penalty.
- Resetting points: You must submit all returns on time for a continuous period of 12 months (4 consecutive quarters) and have all historic returns filed.
2. Late Payment Penalties & Interest
Late payment sanctions operate on a progressive timeline:
- Up to 15 days late: 0% penalty (grace window).
- Day 16 to 30: 2% penalty on the tax outstanding at day 15.
- Day 31 onwards: An additional 2% penalty on the tax outstanding at day 30 (4% total fixed penalty), plus an ongoing daily penalty calculated at 4% per annum on the outstanding balance.
- Late Payment Interest: HMRC charges late payment interest (Bank of England base rate + 2.5%) from day one until payment is settled in full.
Making Tax Digital: Digital Records & Digital Links
Compliance under MTD for VAT requires maintaining digital records of:
- Business name, address, and VAT registration number.
- The VAT scheme used.
- For each supply made: date, net value, and VAT rate charged.
- For each supply received: date, net value, and input tax claimed.
Under HMRC's Digital Links mandate, data cannot be manually transcribed or re-typed between software systems, spreadsheets, or accounting modules. Software must communicate via automated API feeds or native formulas.
How ac-co Powers Seamless MTD VAT Filings
ac-co transforms VAT compliance from a stressful quarterly scramble into an automated, real-time background process:
- Direct Open Banking feeds reconcile transactions against VAT rates (20%, 5%, 0%, Exempt, Outside Scope).
- Flags potential input tax traps (e.g. client entertainment, company car leasing restrictions) automatically.
- Compiles the 9 boxes of Form VAT100 with a full click-through digital audit trail back to individual invoice PDFs.
- Transmits returns directly to HMRC's MTD API, receiving and storing encrypted HMRC submission confirmations.