How it works
How VAT works in the UK
This VAT calculator handles the two sums UK shoppers and small businesses run most often: adding 20% VAT to a net price, and stripping VAT out of a gross price to see the true ex-tax cost. If you want to sanity-check a supplier invoice or price your own quote, start here and then cross-reference the percentage calculator, the income tax calculator or the PAYE salary calculator for the rest of the numbers on your payslip.
Value Added Tax is a consumption tax — you pay it when you buy most goods and services, and the business passes it on to HMRC. The standard rate has been 20% since January 2011. Two other rates exist: 5% reduced (domestic gas and electricity, child car seats, some mobility aids) and 0% zero-rated (most food, children's clothing, books, newspapers). Some services, like insurance and education, are exempt — which is not the same as zero-rated from a business perspective.
A business must register for VAT once its taxable turnover exceeds the threshold (£90,000 from 1 April 2024, unchanged for 2025/26). Once registered, it adds VAT to its sales and can reclaim VAT on its own purchases. For everyone else, VAT is already baked into the shelf price.
The two sums you'll actually do
If you're invoicing a client or quoting a price, you have a net figure and need to add VAT. If you're looking at a receipt or ad that already includes VAT, you have a gross figure and need to work back to the net.
Adding VAT to a net price
Net × 1.20 = Gross. So £200 net becomes £240 gross (£40 VAT).
For the reduced 5% rate, multiply by 1.05. Zero-rated items stay unchanged.
Removing VAT from a gross price
Gross ÷ 1.20 = Net. So £240 gross back-calculates to £200 net with £40 VAT.
A common shortcut: Gross ÷ 6 gives the VAT element on a 20%-rated item. (Because 20/120 = 1/6.) On a £120 shop, that's £20 of VAT.
When to use each VAT rate
HMRC publishes a comprehensive VAT notice (Notice 701/40) explaining every category in minute detail. The summary table below covers the most common consumer situations.
| Rate | Typical items | Consumer impact |
|---|---|---|
| 20% Standard | Electronics, clothing (adult), restaurants, alcohol, petrol | What you pay on the high street |
| 5% Reduced | Household energy, energy-saving installations, child car seats | Capped consumer essentials |
| 0% Zero-rated | Most food, books, children's clothing, public transport | No VAT added but still formally VAT-able |
| Exempt | Insurance, postage, healthcare, education | Business cannot reclaim input VAT |
VAT for small businesses and freelancers
If you're a freelancer quoting a client, the rule of thumb is: below £90,000 turnover you don't charge VAT; above it, you must register and add 20% to your invoices. Many small businesses voluntarily register below the threshold because they can then reclaim the VAT on their own business purchases — useful if you buy a lot of kit.
Three registration schemes are worth knowing about:
- Standard VAT scheme — track VAT on every sale and purchase, file quarterly returns via Making Tax Digital.
- Flat Rate Scheme — pay a simplified flat percentage (e.g. 14% for IT consultants) on your gross turnover. Easier to run but sometimes more expensive.
- Cash Accounting — account for VAT when money actually moves, not when the invoice is raised. Helpful if clients pay slowly.
Common mistakes and quick tips
The wrong VAT maths on a big invoice can cost you the best part of a weekend re-issuing things. The two most frequent slip-ups:
- Multiplying by 0.20 instead of 1.20 when adding VAT — giving a 20%-of-net answer instead of net-plus-VAT.
- Dividing by 1.20 when the gross includes the 5% rate (should be 1.05).
- Forgetting that a zero-rated sale still counts towards your VAT turnover for registration.
How this calculadora is built
We use `Decimal.js`-quality arithmetic in the browser to avoid floating-point rounding on large invoices — the result you see is correct to the penny. All rates are sourced from GOV.UK and updated within 24 hours of any Spring or Autumn Statement change.
Worked invoice examples across sectors
Applying VAT is straightforward once you anchor a few concrete cases to memory. Here are four real scenarios that a small UK business owner typically faces, showing the full net, VAT and gross breakdown.
Freelance designer billing £2,400 for a brand project
If the designer is VAT-registered, she adds 20 % to the net fee: £2,400 × 1.20 = £2,880 gross, with £480 of VAT owed to HMRC in the next quarterly return. The client, if VAT-registered themselves, reclaims the same £480 as input VAT — so the real cost of the project is still £2,400.
If the designer is not registered, she simply invoices £2,400 with no VAT line at all. A client comparing the two quotes will usually see the non-registered option as £480 cheaper, because they cannot reclaim what was never charged.
Plumber buying £900 of tools for a new van
The tool supplier charges £900 net + £180 VAT = £1,080 gross. A VAT-registered plumber reclaims the £180 on the next return. An unregistered sole trader absorbs the £180 as a real business cost, effectively paying 20 % more for every bit of kit. This is why tradespeople with heavy capital purchases often register voluntarily below the threshold.
Coffee shop with mixed VAT rates
A takeaway latte is zero-rated (hot drinks not consumed on the premises? — actually, hot drinks are always standard-rated regardless). A chilled bottled water sold cold is zero-rated. A sit-in latte is standard-rated at 20 %. The till system has to split the sale by VAT code, otherwise HMRC will reassess at the highest rate on audit. Misclassifying Sidney the scone (zero-rated cold) as a coffee (20 %) happens often and can trigger refunds the business never had to collect.
Online retailer selling £50,000 of goods into the EU
Post-Brexit, sales to EU consumers below €150 go through the Import One-Stop Shop (IOSS) with VAT collected at the EU destination rate. Sales above €150 become importer-of-record transactions where the consumer pays VAT and customs at delivery. For B2B sales to EU-registered businesses, the transaction is usually zero-rated UK VAT, with the buyer self-accounting on their local return (reverse charge).
VAT penalties, points and interest
HMRC rewrote the penalty regime for VAT from January 2023 to a points-based system, similar to driving licence points. Each late VAT return gets one point; at four points (for quarterly filers), a £200 fine is issued, then another £200 for every further late return until the slate is cleared by twelve months of on-time filing.
Late payment triggers separate charges: 2 % of the unpaid VAT at day 15, a further 2 % at day 30, then a daily 4 % annualised rate from day 31. On top, HMRC charges interest at Bank Rate + 2.5 % on the overdue balance. A £10,000 bill paid 45 days late therefore costs roughly £420 in penalties plus interest — enough to pay for an accountant several times over.
Industries with quirky VAT rules
Most of the VAT code is dull and predictable. A handful of sectors have rules that trip up even experienced accountants.
- Construction — the domestic reverse charge applies to most B2B building work, shifting VAT accounting to the main contractor rather than the sub-contractor.
- Food — hot food for takeaway is standard-rated; cold food to take away is zero-rated; but chocolate-covered biscuits are standard-rated while chocolate-chip biscuits are zero-rated. The biscuit wars are real.
- Financial services — most are exempt, meaning the bank or broker cannot reclaim input VAT on its overheads. This is why advisory firms with mixed activities watch their partial exemption calculations carefully.
- Charities — VAT status depends on the activity, not the charitable purpose. Charity shops benefit from zero-rating on donated goods but pay VAT on bought-in stock.
- Property — most commercial property sales are exempt by default, with the owner allowed to opt to tax to recover VAT on refurbishment costs. Residential lets are always exempt.
- Digital services to consumers — B2C digital sales (apps, e-books, streaming) into the EU use the OSS; into other territories they follow the destination country's own rules.
Choosing between the Flat Rate Scheme and the Standard Scheme
Small businesses below £150,000 net taxable turnover can opt into the Flat Rate Scheme (FRS), paying a single percentage of gross turnover instead of calculating VAT on every line. Whether it saves money depends on your sector and how much VAT you actually incur on purchases.
Since 2017 there's also a limited cost trader rate of 16.5 % for businesses whose VAT-able goods expenditure is under 2 % of turnover — a deliberate HMRC move to stop very low-cost services from gaming the FRS. Most IT consultants, copywriters and marketing freelancers now fall into this bracket and should double-check the maths before joining.
| Scheme | Best for | Trade-off |
|---|---|---|
| Standard | Businesses with material VAT on purchases (retail, construction) | Full record-keeping, quarterly reconciliations |
| Flat Rate | Service businesses with low VAT expenses, first-time VAT registrants | Simplicity at the cost of potential over-payment |
| Annual Accounting | Small businesses with predictable cash flow | One return per year but interim payments required |
| Cash Accounting | Businesses with slow-paying clients | VAT due only when paid, not when invoiced |
| Margin schemes (second-hand) | Antiques, used cars, art dealers | VAT charged only on the margin, not the full price |
International VAT touchpoints
Running a UK business with overseas customers or suppliers drags you into a wider world of VAT. A quick orientation:
Importing goods from outside the UK
Import VAT is due at the UK border at 20 % (or the relevant rate) on the goods' value plus duty plus shipping. VAT-registered importers can use Postponed Import VAT Accounting (PIVA) to declare and reclaim the import VAT on the same return, avoiding any cash-flow hit.
Selling services to overseas businesses
Business-to-business services usually follow the place of supply being the customer's location. That normally means no UK VAT is charged — the customer self-accounts via the reverse charge in their own country.
Selling goods to Northern Ireland
Since Brexit, Northern Ireland sits in a hybrid VAT zone. Goods movements between Great Britain and Northern Ireland have their own rules under the Windsor Framework. Specialist advice is usually essential.