Tax Calculator (VAT / GST)
Universal tax calculator. Add or remove VAT, GST or Sales Tax. Automatic rates for all major countries.
What is a VAT / GST calculator?
This tool helps you switch between net (before tax) and gross (tax included) amounts using a percentage rate. Use it for invoices, shelf prices, and quick sanity checks when you already know the rate that applies to your case.
Default country rates are indicative only. Real liabilities depend on product category, exemptions, registration status, and rules where your business or purchase is taxed. Confirm official rates and obligations before filing or contracting.
Everyday examples
Use these as starting points, then change country, currency, and rate to match your invoice or receipt.
EU shelf price check
€40 net + 21% VAT → €48.40 gross; compare with what you pay at checkout.
Invoice net from gross
€242 gross at 21% → €200 net and €42 VAT extracted for bookkeeping.
UK-style quick split
£120 gross at 20% VAT → £100 net + £20 tax when validating a supplier bill.
Polish 23% bracket
1 230 PLN gross → 1 000 PLN net + 230 PLN VAT for domestic B2B quotes.
GST-inclusive ticket
AU $110 inclusive at 10% GST → $100 base + $10 GST for expense reports.
US sales-tax sanity check
Enter net amount and your local combined rate when the register shows tax as add-on.
How this calculator works
Pick whether your amount is net or gross, choose a region for an indicative rate, then adjust the percentage if your real rate differs.
When should you use this?
Invoices and quotes
Convert between net lines and gross totals when preparing or checking documents.
Shopping and expenses
See how much of a sticker price is tax versus base cost.
Spreadsheet checks
Cross-check cells before locking numbers in models or expense claims.
Common mistakes
Mixing net and gross mode
If the amount already includes tax, use gross mode; otherwise use net mode.
Trusting default rates blindly
Reduced rates and exemptions change effective percentages by product.
Wrong currency vs country
Align currency with how you pay; rates come from the selected country preset.
Core formulas
Let R be the rate in percent. Amounts below match the two modes in the tool.
| Scenario | Calculation | Result | Real-world context |
|---|---|---|---|
| Add tax (net → gross) | Tax = Net × (R ÷ 100); Gross = Net + Tax | Gross shown as main total | Supplier quotes net; you need the invoice total. |
| Extract tax (gross → net) | Net = Gross ÷ (1 + R ÷ 100); Tax = Gross − Net | Net and tax split | Receipt shows only the inclusive price. |
| Zero rate | R = 0 → Gross equals Net | No tax component | Exports or exempt supplies in some regimes. |
| Rounding two decimals | Final lines rounded per currency display | Matches typical invoice cents | Small penny drift vs raw floats is normal. |
| Rate change mid-period | Re-run with each applicable R | Separate totals per band | VAT increases often apply by invoice date. |
| Multi-line invoices | Sum net lines first, then apply R per line if mixed | Line-accurate vs blended total | Mixed reduced and standard rates need line splits. |
Key terms
VAT / GST
Consumption taxes charged at stages of supply or on final sales, depending on jurisdiction.
Net amount
Value before the selected tax is added.
Gross amount
Total including tax for the chosen rate.
Sales tax (US-style)
Often a retail-level add-on; combined state and local rates vary by location.
Frequently Asked Questions
Quick answers about VAT, GST, Sales Tax, and how this calculator works.
What is the difference between VAT and GST?
Both are broad consumption taxes. VAT is common in Europe; GST is the label used in countries such as Australia, Canada, and New Zealand. Mechanics overlap but filing rules differ.
How is US Sales Tax different?
Sales tax is usually charged once at retail, while VAT/GST often applies across supply chains. Local combined rates vary.
How do I calculate tax manually?
Add tax: Net × (1 + R%). Extract tax: Gross ÷ (1 + R%).
Are the built-in country rates legally binding?
No. They are shortcuts for illustration. Always verify current official rates, exemptions, and registration rules.
About these results
This page gives educational estimates only. It is not tax, legal, or accounting advice and does not replace your advisor or government guidance.