VAT Explained: A Practical Guide for UK Small Businesses

At a Glance

• You must register for VAT if your taxable turnover exceeds £85,000 in a 12-month period
• The standard VAT rate is 20%. Reduced rate is 5%. Some goods and services are zero-rated (0%) or exempt
• You charge VAT on your sales (output VAT) and reclaim VAT on your purchases (input VAT)
• VAT returns are usually filed quarterly through Making Tax Digital (MTD)
• The Flat Rate Scheme simplifies VAT for small businesses
• Penalties for late filing or payment can be significant

What Is VAT?

VAT (Value Added Tax) is a tax on the value added to goods and services at each stage of production and distribution. In practice, it works like this:

As a VAT-registered business, you charge VAT on the goods and services you sell to your customers. This is called ‘output VAT’. You also pay VAT on the goods and services you buy from your suppliers. This is called ‘input VAT’.

Every quarter (or month, or year — your choice), you file a VAT return with HMRC. You tell them how much output VAT you collected and how much input VAT you paid. If your output VAT is higher than your input VAT, you pay the difference to HMRC. If your input VAT is higher, HMRC refunds the difference to you.

You are essentially acting as a tax collector. The VAT your customers pay you gets passed on to HMRC, minus any VAT you have already paid to your suppliers.

Important: VAT is not your money. It belongs to HMRC from the moment your customer pays it. Many small business owners get caught out by treating VAT-inclusive amounts as their own revenue. Keep VAT separate in your mind (and ideally in a separate bank account).

When Do You Need to Register?

You must register for VAT if:

Your taxable turnover exceeds £85,000 in any rolling 12-month period. This is not calendar year — it is any consecutive 12 months. If your turnover from 1 July 2024 to 30 June 2025 was £86,000, you must register. You have 30 days from the end of the month in which you exceeded the threshold.

You expect your turnover to exceed £85,000 in the next 30 days alone. This applies to one-off large orders or contracts.

You can also voluntarily register for VAT even if you are below the threshold. This can make sense if:

• Your customers are VAT-registered businesses (they can reclaim the VAT you charge, so it costs them nothing)
• You pay significant VAT on your purchases and want to reclaim it
• Being VAT-registered makes your business look more established

You should not voluntarily register if your customers are consumers (who cannot reclaim VAT) and you operate in a price-sensitive market. Adding 20% VAT to your prices might lose you business.

VAT Rates

The UK has several VAT rates depending on what you are selling:

VAT Schemes

HMRC offers several VAT schemes designed to simplify things for smaller businesses:

Flat Rate Scheme: Instead of calculating VAT on every transaction, you pay a fixed percentage of your total (VAT-inclusive) turnover. The percentage varies by industry (12.5% for IT consultants, 14.5% for accountancy, 6.5% for retail food, etc.). You cannot reclaim input VAT on purchases (except capital assets over £2,000). This scheme is available if your taxable turnover is £150,000 or less.

Cash Accounting Scheme: You only pay VAT to HMRC when your customers pay you, and you only reclaim VAT when you pay your suppliers. This is different from the standard scheme where VAT is due based on invoice dates regardless of payment timing. Good for businesses with slow-paying customers. Available if turnover is £1.35 million or less.

Annual Accounting Scheme: You make advance VAT payments throughout the year based on your last return (or estimated if new), then file one annual VAT return and settle the difference. Reduces admin but gives less frequent cash flow information. Available if turnover is £1.35 million or less.

Filing Your VAT Return

Since April 2022, all VAT-registered businesses must file their VAT returns through Making Tax Digital (MTD). This means:

• You cannot file VAT returns through the old HMRC portal
• You must use MTD-compatible software (Xero, QuickBooks, Sage, FreeAgent, or bridging software)
• Your software must keep digital records and submit the return directly to HMRC

Most businesses file quarterly. Your quarters are determined by your VAT registration — they might be April-June, July-September, October-December, and January-March, or they might be offset by a month depending on when you registered.

Your VAT return asks for 9 ‘boxes’:

• Box 1: VAT due on sales and outputs
• Box 2: VAT due on acquisitions from EU (usually zero now)
• Box 3: Total VAT due (Box 1 + Box 2)
• Box 4: VAT reclaimed on purchases and inputs
• Box 5: Net VAT to pay or reclaim (Box 3 minus Box 4)
• Box 6: Total value of sales excluding VAT
• Box 7: Total value of purchases excluding VAT
• Box 8: Total value of EU sales excluding VAT
• Box 9: Total value of EU purchases excluding VAT

The deadline to submit and pay is usually one calendar month and 7 days after the end of your VAT period. For the quarter ending 30 June, the deadline is 7 August.