VAT Calculator
Calculate Value Added Tax (VAT) to add tax to a net price or remove tax from a gross total with flexible, editable rates.
Last verified: September 2026Inputs & Parameters
VAT/GST rates vary by jurisdiction and transaction type. Verify the rate applicable to your transaction.
Calculation Results
Value Added Tax calculated for business and invoice reconciliation.
How Value Added Tax (VAT) and GST Calculations Work
Value Added Tax (VAT), also known as Goods and Services Tax (GST) in many jurisdictions, is a consumption tax assessed on the incremental value added to goods and services at each stage of production and distribution. Businesses frequently need to both add VAT to net prices to quote consumer invoices and remove VAT from gross receipts to report taxable turnover.
Core Mathematical Formulas
- Adding VAT (Net to Gross):
VAT Amount = Net Amount × (Rate / 100)Gross Amount = Net Amount × (1 + (Rate / 100)) - Removing VAT (Gross to Net):
Net Amount = Gross Amount / (1 + (Rate / 100))VAT Amount = Gross Amount - Net Amount
The Common Reverse-Calculation Pitfall
A common mathematical mistake when extracting VAT from a gross price is simply multiplying the gross amount by the VAT percentage. Doing so produces an artificially inflated tax figure because the percentage is applied against an already tax-inclusive total. You must always divide by 1 + (Rate / 100) to find the true net base.
Worked Example
An item is priced at $120.00 gross with a standard 20% VAT rate:
1. Net Pre-Tax Amount = $120.00 / (1 + 0.20) = $100.00
2. Extracted VAT Component = $120.00 - $100.00 = $20.00
3. Check: $100.00 net + ($100.00 × 20%) = $120.00 gross (Accurate)
Assumptions & International Considerations
VAT/GST rates vary by jurisdiction and transaction type. Verify the rate applicable to your transaction. This calculator provides mathematical estimation and does not constitute official tax, accounting, or legal advice.