If you sell digital services, run a remote agency, or keep books for a group that spans Australia and the United Kingdom, you will hear two different consumption-tax dialects: GST at a headline 10% in Australia and VAT with a 20% standard rate commonly quoted for UK supplies in many B2B examples. The algebra is similar (multiply or divide by 1 + rate), but the labeling culture on quotes and the registration story are not interchangeable. This page is a practical comparison for operators, not legal advice for any jurisdiction.
Snapshot table (headline rates only)
| Topic | Australia (GST) | United Kingdom (VAT) |
|---|---|---|
| Typical standard headline | 10% on many taxable supplies | 20% standard rate (reduced/zero categories exist) |
| Inclusive vs exclusive habits | B2C receipts often GST-inclusive; quotes may be exclusive until stated | B2B quotes often show net + VAT lines; consumer retail often VAT-inclusive |
| Strip tax from a gross receipt | Divide inclusive by 1.10; GST portion is inclusive minus net (one-eleventh framing) | Divide inclusive by 1.20 at 20% standard; VAT is gross minus net |
| What calculators do here | Arithmetic for labeled inputs only | Arithmetic for labeled inputs only |
Worked numbers you can trace in a spreadsheet
Australia: You quote $330 AUD GST-inclusive for a fixed package. Net is $330 ÷ 1.1 = $300, GST is $30. If someone multiplies $330 by 10% and calls that the GST component, they are using the wrong base (classic inclusive mistake).
United Kingdom (illustrative 20% standard): You quote £240 VAT-inclusive for a training day. Net is £240 ÷ 1.2 = £200, VAT is £40. If your contract should have been net-plus-VAT but the PDF only shows one number, resolve the ambiguity before signatures, not after payment.
Use the live tools when you want the UI to carry rounding policy for you: GST calculator Australia and the VAT calculator.
UK payroll and distributions (separate from VAT mechanics)
Once VAT lines are credible, founders still need PAYE vs dividend sketches. The UK finance and tax hub bundles those calculators with explicit non-filing disclaimers, alongside respectful Zakat planning links when that topic matters to the same household books.
When to open which long-form guide first
- GST inclusive vs exclusive (Australia) when your team keeps mislabeling quote bases.
- Add vs remove VAT (UK, EU, UAE) when you need the algebra spelled out for multiple regions.
- UK self-employed vs dividend vs salary sketches when consumption tax is fine but personal effective rates are the argument.
Why this page is outreach-friendly
Communities love shareable tables with honest caveats. If you reference this URL in a thread, lead with the limitation: rates and registration rules change, and mixed supplies need human classification. Then link the table as a mnemonic, not as law.