UK VAT & Sales Tax: Complete Guide for Small Businesses

VAT is one of the biggest sources of confusion for small businesses. Get it wrong and you either lose margin or risk penalties.

This guide explains how UK VAT actually works in practice — including rates, thresholds, calculations, and how it affects your pricing and cash flow.

UK VAT Rates Explained

The UK has three main VAT rates:

• 20% (standard rate) – most goods and services
• 5% (reduced rate) – e.g. home energy
• 0% (zero rate) – e.g. most food and children’s clothing

Even at 0%, VAT rules still apply — it’s not the same as being exempt.

VAT Registration Threshold (2026)

You must register for VAT if your taxable turnover exceeds:

• £85,000 (rolling 12 months)

Below this, registration is optional.

Should You Register Voluntarily?

Voluntary registration can make sense if:

• You have high upfront costs and want to reclaim VAT
• Your customers are VAT-registered businesses

It usually hurts if you sell directly to consumers, as your prices become less competitive.

How VAT Works (Real Example)

You sell a product for £100:

• + 20% VAT = £120 charged to customer
• £20 goes to HMRC (minus reclaimable VAT)

That £20 is not your revenue — treating it like it is will distort your margins.

How to Calculate VAT

• VAT = Net × Rate
• Gross = Net + VAT
• Net = Gross ÷ (1 + Rate)

Example

£200 service at 20% VAT:

• VAT = £40
• Total charged = £240

Use the UK VAT Calculator to do this instantly.

VAT Inclusive vs Exclusive Pricing

This is where most small businesses go wrong.

• VAT exclusive pricing → you add VAT on top (common B2B)
• VAT inclusive pricing → VAT is already baked in (common B2C)

If you sell to consumers and forget this, your margin drops immediately after registration.

Reclaiming VAT on Expenses

You can reclaim VAT on:

• Equipment and tools
• Office costs
• Professional services

You cannot reclaim VAT on personal use or non-business expenses.

Partial Exemption

If you sell both VATable and exempt items, you can only reclaim a proportion of VAT.

Common VAT Mistakes

• Registering too late
• Using the wrong VAT rate
• Forgetting VAT in pricing
• Poor record keeping
• Missing filing deadlines

Most mistakes come from treating VAT as an afterthought rather than part of pricing.

VAT and Pricing Strategy

VAT directly impacts profit margins.

If your price is £100 and you become VAT registered, your real revenue drops to £83.33 unless you increase prices.

That’s why VAT should always be considered alongside margin.

Use these tools to set pricing properly:

• Profit Margin Calculator
• VAT Calculator

Related Tools

Related Guides

FAQ

What is VAT?

A tax on most goods and services collected by businesses on behalf of HMRC.

When do I need to register?

When turnover exceeds £85,000 in a 12-month period.

Can I reclaim VAT?

Yes, on eligible business expenses if registered.

Is VAT profit?

No. VAT is collected and passed to HMRC.

Summary

• Standard VAT rate is 20%
• Register at £85,000 turnover
• VAT is not revenue
• Pricing must account for VAT
• Reclaim VAT where eligible