Add or Remove VAT Online Whether you’re a sole trader, small business owner, or finance professional, calculating VAT accurately is essential. Use Accofirm free VAT calculator to instantly add VAT to a net price or remove VAT from a gross amount — no sign-up required, no complicated formulas needed.
How to Use This VAT Calculator
Accofirm’s VAT calculator is designed to be fast and effortless.
Here’s how it works:
- Enter your amount type the price you want to calculate VAT on.
- Select the VAT rate choose 20% (Standard), 5% (Reduced), or 0% (Zero Rate).
- Choose your calculation type select “Add VAT” if you have a net price, or “Remove VAT” if you have a gross price.
- Get your result instantly the calculator displays the VAT amount and the final price in real time. No downloads, no spreadsheets, no manual working required.
Accofirm’s tool gives you accurate VAT figures within seconds ideal for invoicing, quoting clients, or checking supplier costs.
How to Calculate VAT in the UK
VAT (Value Added Tax) is a consumption tax applied to most goods and services sold in the UK. It is collected by businesses on behalf of HMRC and paid to the government. The rate of VAT you charge depends on what you’re selling.
Standard Rate (20%)
The standard VAT rate in the UK is 20% and applies to the majority of goods and services — including electronics, clothing (adult), professional services, and most retail products. If you sell a product for £100 (net), your customer pays £120 (gross). You collect £20 in VAT and pass it to HMRC through your VAT return. This is the rate most UK businesses deal with on a daily basis, and the one Accofirm’s calculator defaults to for convenience.
Reduced Rate (5%)
A reduced rate of 5% applies to certain goods and services that are considered essential or socially beneficial. These include: – Domestic fuel and power (gas and electricity for homes) – Children’s car seats – Sanitary products – Home energy saving materials (e.g., solar panels, insulation) – Residential property conversions For example, if a domestic energy bill is £200 (gross), the VAT component at 5% is £9.52, and the net amount is £190.48.
Zero Rate (0%)
Zero-rated goods and services are still VAT-taxable, but the rate charged is 0%. This means businesses can still reclaim input VAT on costs related to zero-rated sales. Common zero-rated items include: – Most food and drink (for human consumption) – Children’s clothing and footwear – Books, newspapers, and magazines – Public transport – Prescription medicines Zero-rated is different from VAT-exempt. If your business sells only exempt goods (such as financial services or insurance), you cannot register for VAT or reclaim input tax.
VAT Formulas Explained
Understanding the maths behind VAT helps you double-check figures and build accurate invoices. Here are the formulas Accofirm’s calculator uses behind the scenes.
How to Add VAT
To add VAT to a net (excluding VAT) price:
VAT Amount = Net Price × (VAT Rate ÷ 100) Gross Price = Net Price + VAT Amount
Example at 20%:
- Net Price: £250.00 –
- VAT Amount: £250 × 0.20 = £50.00
- Gross Price (inc. VAT): £300.00
Example at 5%:
- Net Price: £150.00
- VAT Amount: £150 × 0.05 = £7.50
- Gross Price (inc. VAT): £157.50
How to Remove VAT (Reverse VAT)
To remove VAT from a gross (including VAT) price, you cannot simply subtract 20% that gives you the wrong answer. You must use the VAT fraction.
VAT Amount = Gross Price ÷ (1 + VAT Rate ÷ 100) × (VAT Rate ÷ 100) Net Price = Gross Price ÷ (1 + VAT Rate ÷ 100)
Example at 20%:
- Gross Price: £360.00
- Net Price: £360 ÷ 1.20 = £300.00
- VAT Amount: £60.00
Example at 5%:
- Gross Price: £210.00
- Net Price: £210 ÷ 1.05 = £200.00
- VAT Amount: £10.00
A common mistake is subtracting 20% directly from the gross price this gives you £288, not £300. Accofirm’s calculator uses the correct reverse VAT formula automatically so you always get the right figure.
Why VAT Calculation Matters for Your Business
Getting your VAT right isn’t just about compliance it directly impacts your cash flow, pricing, and profitability. Here’s why accurate VAT calculation is critical: Correct invoicing: Every VAT-registered business in the UK must issue VAT invoices that clearly show the net amount, VAT rate, VAT amount, and gross total. Errors on invoices can lead to disputes with clients or complications during HMRC audits. Accurate pricing: If you’re quoting clients, knowing whether your prices are net or gross and calculating the difference correctly ensures you don’t accidentally absorb VAT costs yourself. VAT returns: Every VAT-registered business must file quarterly (or monthly) VAT returns with HMRC. Accurate records of output tax (VAT you charged) and input tax (VAT you paid) are essential to avoid overpaying or underpaying. Cash flow management: VAT is collected on behalf of HMRC it’s not your money. Businesses that don’t track VAT separately often face a nasty surprise when their VAT return is due.
Accofirm helps businesses across the UK stay on top of their VAT obligations year-round. Avoiding penalties: HMRC can issue penalties for late VAT submissions, errors on returns, or failure to register when required. Keeping your VAT calculations clean from the start prevents costly mistakes later. At Accofirm, our accounting professionals work with SMEs, contractors, and growing businesses to manage VAT registration, returns, and compliance so you can focus on running your business.
VAT Rates in the UK
VAT Rate | Rate | Applies To
Standard Rate | 20% | Most goods and services retail, professional services, electronics, etc.
Reduced Rate | 5% | Domestic fuel, children’s car seats, home energy-saving materials, sanitary products
Zero Rate | 0% | Food (human consumption), children’s clothing, books, newspapers, prescriptions
Exempt | N/A | Financial services, insurance, education, health services, residential letting
Outside the Scope | N/A | Wages, charitable donations, MOT tests, tolls
Note: VAT rates are set by HMRC and can be subject to change. Always refer to the official HMRC website or consult an accountant for the most up-to-date guidance. Accofirm’s team stays current with all HMRC updates so your business remains compliant.
FAQs About VAT Calculation
How do I register for VAT?
You must register for VAT with HMRC if your taxable turnover exceeds the VAT threshold (see below). You can also register voluntarily if your turnover is below the threshold, which may be beneficial if you want to reclaim VAT on business purchases. To register, you’ll need to complete a VAT registration application through your HMRC online account or via the Government Gateway. Once registered, HMRC will issue you a VAT registration number (a 9-digit number in the format GB000000000), which must appear on all your VAT invoices. The registration process typically takes 10–30 working days. After that, you’ll be assigned a VAT accounting period and filing deadlines. Accofirm can manage your VAT registration from start to finish, ensuring everything is set up correctly with HMRC from day one.
How do I reclaim VAT?
If your business is VAT-registered, you can reclaim the VAT you’ve paid on business-related purchases (input tax) by offsetting it against the VAT you’ve collected from customers (output tax).
Here’s how the process works:
- Keep VAT receipts and invoices for all business purchases.
- Record the input VAT in your accounts.
- When you file your VAT return (typically every quarter), subtract your input VAT from your output VAT.
- If your input VAT is higher than your output VAT, HMRC will refund the difference to your business bank account.
You can only reclaim VAT on goods and services used exclusively for business purposes. Mixed-use items (e.g., a vehicle used for both personal and business travel) may only allow partial reclaim. Accofirm’s accountants help clients maximise their legitimate VAT reclaims while staying fully compliant with HMRC rules.
What is the VAT threshold in the UK?
As of 2025, the UK VAT registration threshold is £90,000 in taxable turnover over a rolling 12-month period.
- If your taxable turnover exceeds £90,000, you are legally required to register for VAT within 30 days.
- If you expect your turnover to exceed £90,000 in the next 30 days alone, you must register immediately.
- The deregistration threshold is £88,000 meaning if your turnover drops below this level, you may apply to deregister.
Failing to register on time can result in backdated VAT liability and penalties from HMRC, so it’s important to monitor your turnover carefully. Not sure whether you need to register? Accofirm offers a free initial consultation to help you assess your VAT obligations and avoid costly surprises. Get in touch with our team today.
This content is provided for general guidance only and does not constitute professional tax advice. For advice specific to your business, please consult a qualified accountant. Accofirm Limited is a UK-based accounting firm offering VAT, tax, and bookkeeping services to businesses of all sizes.