VAT Calculator
Add VAT to net amounts or remove VAT from gross amounts.
Guided Mode (DIY-friendly)
Use the guided steps to avoid VAT mode/rate mistakes.
Type
Rate
Review
UKUK Building Regulations
References & Sources
Standards Cited
- VAT Notice 708 — HMRC VAT Notice 708 — Buildings and construction
Defines VAT rates applicable to construction work: standard rate (20%), reduced rate (5% for certain renovations), and zero rate (for new dwellings) View → - VAT Act 1994 — UK Value Added Tax Act 1994
Primary legislation governing VAT in the UK, including rates, registration thresholds, and exemptions
Formulas Used
- Add VAT (net to gross):
gross = net x (1 + vatRate / 100)
Source: VAT Act 1994 - Remove VAT (gross to net):
net = gross / (1 + vatRate / 100)
Source: VAT Act 1994 - VAT Amount (from net):
vat = net x (vatRate / 100)
Source: VAT Act 1994 - VAT Amount (from gross):
vat = gross - (gross / (1 + vatRate / 100))
Source: VAT Act 1994
Key Assumptions
- UK standard VAT rate is 20% — HMRC / VAT Act 1994
- UK reduced VAT rate of 5% applies to certain renovation and conversion works — HMRC VAT Notice 708
- Zero-rate VAT (0%) applies to new residential construction — HMRC VAT Notice 708