What happens if I charge VAT but am not VAT registered?

Charging VAT on invoices when you are not VAT-registered is illegal. HMRC can demand repayment of all VAT charged and may impose additional penalties and interest. You must notify HMRC within 30 days of exceeding the £90,000 registration threshold.

Online VAT Calculator UK – Free VAT Calculator

Select VAT rate:

Net Amount (excl. VAT) £0.00

VAT Amount (at 20%) £0.00

Gross Amount (incl. VAT) £0.00

20%

Standard UK VAT Rate

£90k

VAT Registration Threshold

Reduced VAT Rate

1973

Year VAT Was Introduced

Guide

How to Use the Online VAT Calculator

Calculate UK VAT in three simple steps — no spreadsheet, no accountant, no sign-up required.

Enter Your Amount

Type any amount into the VAT calculator. This can be a net price (excluding VAT) or a gross price (VAT already included). Decimals are supported — for example £249.99.

Select the VAT Rate

Choose 20% for standard-rated goods and services, 5% for reduced-rate items such as home energy, 0% for zero-rated goods, or enter any custom percentage.

Add VAT or Remove VAT

Click Add VAT to calculate the gross price from a net amount. Click Remove VAT to extract VAT from a gross price. All three values display instantly — copy any with one click.

Education

What Is VAT & How Does It Work in the UK?

Value Added Tax — Explained Simply

VAT (Value Added Tax) is a consumption tax charged on the sale of most goods and services in the United Kingdom. Unlike a basic sales tax, VAT is applied at every stage of the supply chain. Each business in the chain charges VAT on its sales and reclaims the VAT paid on its own purchases — so only the end consumer bears the final cost.

VAT-registered businesses act as unpaid collectors for HMRC (His Majesty's Revenue and Customs). They must apply the correct VAT rate, issue valid VAT invoices, and file regular VAT returns — quarterly by default — reporting VAT collected (output tax) minus VAT paid on purchases (input tax).

The UK introduced VAT on 1 April 1973 when it joined the European Economic Community, replacing the older Purchase Tax. The current standard rate of 20% has been in place since 4 January 2011.

📌 UK VAT Key Facts 2026–27

Standard rate: 20%
Reduced rate: 5%
Zero rate: 0%
VAT registration threshold: £90,000
VAT deregistration threshold: £88,000
Quarterly return deadline: 1 month + 7 days after period end
Flat Rate Scheme limit: turnover up to £150,000
Annual Accounting Scheme limit: up to £1.35 million
Cash Accounting Scheme limit: up to £1.35 million
VAT records must be kept for: 6 years

Formulas

How to Calculate VAT Manually

Understand the mathematics behind UK VAT — useful for building spreadsheets, checking invoices, or simply understanding what our calculator does.

➕ Adding VAT to a Net Price

If you have a price excluding VAT (net price) and want the gross (VAT-inclusive) amount:

// Add 20% VAT to a net amount: Gross = Net × 1.20 VAT = Gross − Net // Example: £500.00 net Gross = 500 × 1.20 = £600.00 VAT = 600 − 500 = £100.00

For the 5% rate, multiply by 1.05. General formula: Net × (1 + rate ÷ 100).

➖ Removing VAT from a Gross Price

If you have a price including VAT (gross price) and want the net amount and VAT portion:

// Remove 20% VAT from a gross amount: Net = Gross ÷ 1.20 VAT = Gross − Net // Example: £600.00 gross Net = 600 ÷ 1.20 = £500.00 VAT = 600 − 500 = £100.00

For 5%, divide by 1.05. General formula: Gross ÷ (1 + rate ÷ 100).

⚠️ Very common mistake: Never calculate VAT by dividing the gross price by 20. On a £120 gross price, dividing by 20 gives £6 — which is completely wrong. The correct method is £120 ÷ 1.20 = £100 net, meaning the VAT is £20. Our online VAT calculator handles this correctly every time.

UK VAT Rates

UK VAT Rates — Complete Breakdown 2026–27

Different goods and services attract different rates. Here is a complete guide to every UK VAT rate category with examples.

VAT Category	Rate	Common Examples
Standard Rate	20%	Most goods & services, electronics, adult clothing, alcohol, tobacco, restaurant meals, hotel stays, new cars, software, digital downloads, accountancy & legal services
Reduced Rate	5%	Domestic gas & electricity, children's car seats, women's sanitary products, smoking cessation products, residential property conversions, mobility aids for elderly, solar panel installation
Zero Rate	0%	Most food (not restaurant meals), children's clothing & footwear, books & newspapers, most prescription medicines, public transport fares, most exports, motorcycle helmets
VAT Exempt	Exempt	Insurance, financial services, private education, health & medical services, postage stamps, funeral services, betting & gambling, residential land sales

💡 Zero-rated vs Exempt — a critical difference: Zero-rated businesses can register for VAT and reclaim input tax on their purchases. VAT-exempt businesses cannot reclaim input tax and generally cannot register for VAT on those exempt supplies. Getting this wrong is a very common and very costly error.

UK VAT Rate History Since 1973

Date	Event	Rate
1 April 1973	VAT introduced in the UK — replaced Purchase Tax and SET	10%
29 July 1974	Standard rate reduced; 25% fuel and luxury tax introduced	8%
18 June 1979	Thatcher government increases the rate	15%
1 April 1991	Major government raises the rate	17.5%
1 December 2008	Temporary cut during the global financial crisis	15%
1 January 2010	Rate restored after end of temporary reduction	17.5%
4 January 2011	Current rate set by Coalition government — in force to this day	20%

Free Tool

UK VAT Registration Threshold Checker

Enter your annual taxable turnover to find out instantly whether you are required to register for VAT — and what to do next.

Do You Need to Register for VAT?

Enter your taxable turnover for the past 12 months (or your projected annual turnover):

The 2026–27 VAT registration threshold is £90,000. Deregistration threshold: £88,000. Always verify with HMRC or a qualified accountant.

Expert Advice

10 VAT Tips Every UK Business Should Know

Practical, money-saving advice used by UK accountants — information most online VAT calculators simply do not provide.

💰 1. Reclaim VAT on Pre-Registration Purchases

Just registered for VAT? You can reclaim VAT on goods purchased up to 4 years before registration and services up to 6 months before — potentially thousands of pounds waiting in your first return.

🚗 2. Claim 50% VAT on Leased Business Cars

You cannot reclaim VAT when buying a car for mixed use, but you can claim 50% of VAT on car lease payments even with private use. This effectively makes one month's lease completely free each year.

📅 3. Use Cash Accounting for Slow-Paying Clients

Under the Cash Accounting Scheme, VAT is only due when your customer actually pays you — not when you issue the invoice. This protects cash flow and provides natural bad debt relief for businesses with long payment terms.

🏠 4. Claim VAT on Home Office Expenses

Working from home? You can reclaim the business proportion of VAT on energy bills, broadband, and rent if your landlord charges VAT. Calculate the proportion by room count or hours — whichever gives the most accurate split.

🚢 5. Use Postponed VAT Accounting on Imports

Post-Brexit, Postponed VAT Accounting lets you account for import VAT on your VAT return rather than paying at the border and waiting months to reclaim it. Net cash impact: zero — a significant advantage for importers.

📉 6. Reclaim VAT on Bad Debts Proactively

Once a customer has not paid for 6 months, you can reclaim the output VAT already paid to HMRC. The window expires 4 years and 6 months from the invoice date — set a calendar reminder and never miss this.

🏦 7. Open a Dedicated VAT Bank Account

Transfer all collected VAT into a separate account immediately. When your quarterly return arrives the money is already set aside — and you earn interest on funds you are only holding temporarily on HMRC's behalf.

⏱️ 8. Time Major Purchases Before Your VAT Period Ends

A £60,000 equipment purchase means £10,000 in reclaimable VAT. Buying before your period closes means reclaiming that cash three months earlier — a meaningful improvement to cash flow for growing businesses.

📋 9. Always Verify Supplier VAT Numbers

HMRC provides a free tool to check VAT registration numbers. If a supplier charges VAT but was never registered, you cannot reclaim it — the loss falls entirely on you. Check all large invoices from new suppliers before paying.

🔍 10. Review Your Flat Rate Percentage Every Year

Flat Rate Scheme percentages vary by industry and your business activities can change. An annual review may reveal you qualify for a lower rate — or that switching to standard VAT accounting would save you significantly more.

Avoid These

8 VAT Mistakes That Cost UK Businesses Thousands

These are the most common and most costly VAT errors — every single one happens regularly to real UK businesses of all sizes.

Applying the Wrong VAT Rate

Charging 20% on zero-rated or exempt goods is one of the most frequent errors. Food, children's clothing, and books are classic grey areas. A wrong rate means you either owe HMRC more — or have overcharged your customers and must refund them.

Claiming Without a Valid VAT Invoice

A card receipt or bank statement is not a valid VAT invoice. HMRC requires the supplier's name, address, VAT number, invoice date, description of supply, net amount, VAT rate, and total VAT charged — all on one document.

Missing Mixed-Use VAT Reclaims

Mobile phones, broadband, and utility bills — if used partly for business, you can reclaim the business proportion of VAT. Most businesses overlook this completely, leaving a predictable amount of money on the table each quarter.

Confusing Staff vs Client Entertainment

VAT is reclaimable on staff-only entertainment but blocked entirely for client entertainment. If even one client attends a team lunch, the full cost becomes non-reclaimable. Keep client events completely separated in your records.

Not Keeping Records for 6 Years

HMRC can inspect VAT records going back 6 years. Changing accountants or switching software without exporting your full history first is a surprisingly common and very painful mistake that leaves you fully exposed to investigation.

Not Filing On Time Because You Cannot Pay

Always file your VAT return on time even when you cannot pay the bill. Filing late plus paying late means double penalties. File first, then call HMRC to arrange a Time to Pay agreement — they are supportive in most genuine cases.

Forgetting VAT on Personal Use of Business Stock

If you take goods from your business stock for personal use — a builder using materials on their own property, a baker taking bread home — you must account for output VAT at market value. HMRC catches this regularly in audits.

Issuing Refunds Without Proper Credit Notes

Refunding a customer without raising a formal VAT credit note means your return overstates output tax. Always issue a credit note and adjust your records — failure to do so accumulates errors that are difficult and expensive to unwind.

FAQ

Frequently Asked Questions — UK VAT

Clear, accurate answers to the most common questions about Value Added Tax in the United Kingdom.

What is the current VAT rate in the UK?

The current standard VAT rate in the UK is 20%, in place since 4 January 2011. A reduced rate of 5% applies to certain goods and services including domestic gas and electricity, children's car seats, and women's sanitary products. A zero rate of 0% applies to essentials such as most food, children's clothing, books, and newspapers. Some supplies are VAT exempt, meaning VAT does not apply at all and the supplier cannot reclaim input tax.

How do I add VAT to a price?

To add 20% VAT to a net (ex-VAT) price, multiply by 1.20. For example, a £500 net price becomes £600 gross (£500 × 1.20 = £600). The VAT amount is £100. For the 5% rate, multiply by 1.05. For any rate, multiply by 1 + (rate ÷ 100). Our free online VAT calculator UK does this instantly — just enter the amount and click Add VAT.

How do I remove VAT from a gross price?

To remove 20% VAT from a gross (VAT-inclusive) price, divide by 1.20. For example, £600 ÷ 1.20 = £500 net. The VAT is £100. A very common mistake is dividing by 20 — this gives a completely wrong result. Always divide by the multiplier (1.20 for 20%, 1.05 for 5%). Use our Remove VAT button above for instant, accurate results.

What is the UK VAT registration threshold in 2026–27?

The UK VAT registration threshold for 2026–27 is £90,000 in taxable turnover over any rolling 12-month period. If your turnover exceeds this, you must register for VAT with HMRC within 30 days. The deregistration threshold is £88,000. You can also register voluntarily below the threshold — often beneficial if your customers are VAT-registered, as it lets you reclaim VAT on your own purchases.

What is the difference between zero-rated and VAT exempt?

Zero-rated means the supply is taxable but at a 0% rate — the supplier can register for VAT and reclaim input tax on their purchases. This is why a baker or printer can receive VAT refunds despite charging 0%. Exempt means the supply falls entirely outside the VAT system — the supplier cannot reclaim input VAT on related purchases, and if they make only exempt supplies, they cannot register for VAT at all.

What is the VAT Flat Rate Scheme and is it worth it?

The Flat Rate Scheme simplifies VAT for businesses with turnover under £150,000. Instead of accounting for VAT on every individual transaction, you pay HMRC a fixed percentage of your gross VAT-inclusive turnover. Rates vary by sector — 12% for IT consultants, 9% for catering businesses. You cannot reclaim VAT on most purchases under the FRS. It typically suits businesses with high margins and low costs — always review with a qualified accountant before joining.

When is my VAT return due?

Most VAT-registered businesses submit quarterly VAT returns. The deadline for both filing the return and paying any VAT owed is 1 calendar month and 7 days after the end of the VAT period. Example: period ending 31 March means the deadline is 7 May. All returns must now be submitted digitally through HMRC-compatible software under Making Tax Digital (MTD) for VAT, mandatory since November 2022.

Can I reclaim VAT on business purchases and expenses?

Yes. VAT-registered businesses can reclaim input tax on goods and services used for business purposes, provided you hold a valid VAT invoice. You cannot reclaim VAT on client entertainment, personal expenses, or cars purchased for mixed use. You can reclaim the business proportion on mixed-use items — mobile phones, home energy bills, broadband. Always keep valid VAT invoices for every claim; a card receipt is not sufficient.

What happens if I charge VAT but am not registered?

Charging VAT on invoices when you are not VAT-registered is illegal. HMRC can demand repayment of all VAT charged plus penalties and interest. Monitor your rolling 12-month taxable turnover carefully — you must notify HMRC within 30 days of exceeding the £90,000 threshold. Using our VAT threshold checker above makes tracking this simple.

⚖️ Important Disclaimer

All information on OnlineVATCalculatorUK.co.uk is provided for general guidance and educational purposes only. While we aim for accuracy at all times, VAT law is complex, subject to change, and individual circumstances vary significantly. Nothing on this website constitutes professional tax or financial advice. For matters specific to your business, always consult a qualified accountant, tax adviser, or contact HMRC directly. HMRC's official published guidance should always be treated as authoritative.