UK VAT Calculator
Use this quick tool to add VAT, remove VAT, or see the VAT portion for any amount.
Common UK rates include 20% (standard), 5% (reduced), and 0% (zero-rated).
What this VAT calculator UK tool does
If you need a fast and accurate UK VAT calculation, this page gives you exactly that. You can:
- Add VAT to a net amount (before tax).
- Remove VAT from a gross amount (price including tax).
- Calculate VAT only so you can see just the tax portion.
This is useful for freelancers, sole traders, limited companies, online sellers, and anyone trying to understand invoices, receipts, or business pricing.
How VAT works in the UK
VAT (Value Added Tax) is a consumption tax charged on many goods and services in the UK. Businesses that are VAT-registered collect VAT from customers and usually reclaim VAT on eligible business purchases.
In day-to-day terms, VAT affects:
- How much your customer pays
- How much you report to HMRC
- Your pricing strategy and profit margin
- Cash flow timing when filing VAT returns
Common UK VAT rates
- 20% – standard rate (most goods/services)
- 5% – reduced rate (certain qualifying items)
- 0% – zero-rated supplies (still taxable, but at 0%)
VAT treatment can vary depending on product type and circumstances, so always check official HMRC guidance for edge cases.
VAT formulas you should know
1) Add VAT to a net price
VAT amount = Net × (Rate ÷ 100)
Gross amount = Net + VAT amount
2) Remove VAT from a gross price
Net amount = Gross ÷ (1 + Rate ÷ 100)
VAT amount = Gross − Net
3) VAT amount only from net
VAT amount = Net × (Rate ÷ 100)
Worked examples
Example A: Add 20% VAT to £100
- VAT = £100 × 0.20 = £20
- Gross = £100 + £20 = £120
Example B: Remove 20% VAT from £120
- Net = £120 ÷ 1.20 = £100
- VAT = £120 − £100 = £20
Example C: VAT only at 5% on £850
- VAT = £850 × 0.05 = £42.50
When to add VAT vs remove VAT
Use Add VAT when you have a net price and need the customer-facing total. Use Remove VAT when you receive a VAT-inclusive amount and need to split out tax versus net value.
This distinction matters for:
- Creating accurate invoices
- Reconciling bookkeeping entries
- Estimating tax liabilities
- Comparing supplier quotes fairly
VAT calculator tips for businesses
1) Keep pricing consistent
Decide whether your website and quotes show prices including or excluding VAT. Switching format causes customer confusion and accounting mistakes.
2) Store net, VAT, and gross values
Recording all three values makes reporting, audits, and returns much easier. Most accounting software does this automatically, but only if entries are made correctly.
3) Watch rounding differences
Rounding can vary by line item versus invoice total. Use a consistent method and check that your invoice and bookkeeping system match.
4) Check special VAT rules
Some items may be exempt, zero-rated, reduced-rate, or outside the scope of VAT. If something seems unusual, verify before invoicing.
FAQ: VAT calculator UK
Is this calculator only for 20% VAT?
No. You can enter any VAT rate, including 5% and 0%.
Can I use it for reverse VAT calculations?
Yes. Choose “Remove VAT (Gross → Net)” to extract VAT from a VAT-inclusive amount.
Does this replace HMRC advice?
No. This is a practical estimation tool. For legal/tax decisions, check current HMRC guidance or speak with a qualified accountant.
Final thoughts
A reliable VAT calculator helps you invoice correctly, understand margins, and avoid avoidable errors. Whether you’re pricing a single project or reviewing hundreds of transactions, knowing how to add and remove VAT quickly is a valuable business skill.