Navigate UK VAT with confidence. This guide covers HMRC requirements, Making Tax Digital (MTD), VAT registration, filing deadlines, input tax recovery, and the CIS scheme — everything UK businesses need to stay compliant.
Value Added Tax (VAT) is a consumption tax charged on most goods and services sold in the United Kingdom. The standard VAT rate is 20%, with reduced rates of 5% for certain items (e.g., home energy, child car seats) and 0% for essentials like most food, children's clothing, and books. VAT-registered businesses act as tax collectors — they charge VAT on sales, reclaim VAT on business purchases, and remit the difference to HMRC.
Since Brexit, UK VAT operates independently from the EU VAT system. Businesses importing goods from the EU now face import VAT (handled through postponed VAT accounting for most), and the rules for selling services to EU customers have changed. Understanding these post-Brexit implications is essential for businesses with cross-border trade.
You must register for VAT with HMRC if your taxable turnover exceeds £85,000 in any 12-month rolling period, or if you expect it to exceed £85,000 in the next 30 days. Registration is also required if you receive goods from the EU worth more than £85,000. Voluntary registration is possible below this threshold and can be advantageous — it allows you to reclaim input VAT on purchases, enhances credibility with B2B customers, and may be required by certain clients.
Registration is done online through the HMRC website. Once registered, you receive a VAT registration number (VRN) that must appear on all invoices and official correspondence. You can choose from several VAT schemes: the Standard Scheme, the Flat Rate Scheme (simplified for small businesses with turnover under £150,000), the Cash Accounting Scheme (pay VAT only when you receive payment), or the Annual Accounting Scheme (one annual return with interim payments).
Making Tax Digital is HMRC's initiative to digitise the UK tax system. Since April 2022, all VAT-registered businesses must keep digital records and submit VAT returns using MTD-compatible software — spreadsheets alone are no longer acceptable unless linked to MTD software via API. This means your accounting software must be able to submit VAT returns directly to HMRC through their digital platform.
MTD requires you to maintain digital records of all sales and purchases, the VAT charged and reclaimed, and the adjustments made. These records must be stored digitally and maintained for at least 6 years. The software must be able to produce a VAT return in the correct format and submit it via HMRC's API. SaltBooks is fully MTD-compatible, handling digital record-keeping and direct HMRC submission automatically.
Most businesses file VAT returns quarterly. The deadline for filing and payment is one calendar month and seven days after the end of the VAT period. For example, a VAT quarter ending 31 March has a filing deadline of 7 May. HMRC assigns your quarterly periods when you register, but you can request different periods if needed. Late filing incurs penalties under HMRC's points-based system — accumulate enough points and you'll face a £200 penalty, with further penalties for continued late filing.
Late payment also attracts penalties: no penalty for up to 15 days late, a 2% charge on VAT owed at day 15, an additional 2% at day 30, and a daily rate of 4% per annum from day 31. Interest is also charged on late payments from the due date until the date of payment. These penalties make timely filing essential — set up reminders well in advance of each deadline.
You can reclaim VAT paid on goods and services used for your business (input tax) against the VAT you charge on sales (output tax). To claim input VAT, you must hold a valid VAT invoice, the purchase must be for business purposes, and it must not fall into a blocked category. Blocked items include business entertainment, non-commercial vehicles, and goods purchased for personal use.
For mixed-use items (part business, part personal), you can only reclaim the business portion. The partial exemption rules apply if you make both taxable and exempt supplies — you'll need to calculate the proportion of input VAT you can recover using HMRC's standard method or an approved special method. Keeping accurate records and proper categorisation is critical for maximising your input VAT recovery.
If you work in the construction industry, the Construction Industry Scheme requires contractors to deduct tax from payments to subcontractors and pass it to HMRC. The standard deduction rate is 20% for registered subcontractors and 30% for unregistered ones. Gross payment status (0% deduction) is available for qualifying subcontractors. Contractors must verify subcontractors with HMRC before making payments, submit monthly CIS returns, and issue payment and deduction statements.
Monitor your rolling 12-month turnover carefully. HMRC can backdate registration and charge VAT you should have collected, plus penalties. Use software that tracks your turnover automatically.
Submitting returns through the old HMRC portal or using non-compatible software will result in rejected submissions. Ensure your software is on HMRC's recognised list.
Charging 20% on zero-rated items or failing to apply the reduced rate where applicable creates compliance issues and customer disputes. Configure your product codes correctly.
MTD requires fully digital records with digital links between data sources. Manual transcription between systems breaks the digital link requirement. Use integrated software from the start.
SaltBooks is fully MTD-compatible and handles UK VAT end-to-end. Configure VAT rates once and the system applies them automatically. Submit VAT returns directly to HMRC through the MTD API. Track input VAT recovery with automatic categorisation. Generate Box 1-9 VAT return data with a single click. Handle reverse charge, CIS deductions, and partial exemption calculations. Stay compliant effortlessly while your team focuses on growing the business.
MTD-compatible, HMRC-ready. Let SaltBooks handle your VAT filing. Start your free trial today.