Finance Tools

GST Calculator

Calculate GST (Goods and Services Tax) - Add or remove GST, calculate tax amount, and find net/gross prices. Supports multiple GST rates.

Use GST Calculator to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.

Your results will appear here.

Ready to run.

About this tool

GST (Goods and Services Tax) is a value-added tax levied on most goods and services. Our GST Calculator helps businesses calculate tax amounts for invoicing, pricing, and compliance. It handles both GST-inclusive and GST-exclusive calculations.

The calculator supports all GST rates used worldwide: Australia (10%), India (5%, 12%, 18%, 28%), UK VAT (20%), EU (various rates), Canada (5% GST + provincial), New Zealand (15%), Singapore (9%), and more. Essential for accurate invoicing, quotations, and tax compliance.

Usage examples

Add GST to Price

Calculate total including tax

Net: $1,000 + 10% GST = $100 tax → Total: $1,100

Remove GST from Price

Extract tax from inclusive price

Total: $1,100 (GST inclusive) → Net: $1,000, GST: $100 (10%)

Multiple Items Invoice

Calculate GST on total

Items: $500 + $300 + $200 = $1,000 + 18% GST ($180) = $1,180

How to use

  1. Select calculation type (Add GST or Remove GST)
  2. Enter your amount
  3. Select or enter GST rate (%)
  4. Click "Calculate" to see results
  5. View net amount, GST amount, and total
  6. Use for invoicing and price calculations

Benefits

  • Add or remove GST instantly
  • Calculate net, tax, and gross amounts
  • Supports all GST/VAT rates worldwide
  • Perfect for invoicing and quotations
  • GST-inclusive and exclusive calculations
  • Accurate to 2 decimal places
  • Essential for tax compliance
  • Free with no registration

FAQs

What is the difference between GST inclusive and exclusive?

GST exclusive: Tax added to base price. $100 + 10% GST = $110 total. GST inclusive: Tax already included in displayed price. $110 total includes $10 GST (net $100). Retail prices usually inclusive, wholesale exclusive. Always clarify with customers/suppliers.

How do you calculate GST?

To add GST: Amount × (1 + GST rate). Example: $1,000 × 1.10 = $1,100 (10% GST). To remove GST: Amount ÷ (1 + GST rate). Example: $1,100 ÷ 1.10 = $1,000 net. GST amount: Net × GST rate or Total - Net. Formula: GST Amount = Net Price × (Rate ÷ 100).

What are common GST rates worldwide?

Australia: 10% GST. India: 5%, 12%, 18%, 28% (essential goods lower, luxury higher). UK: 20% VAT. EU: 15-27% VAT (varies by country). Canada: 5% GST + provincial (total 13-15%). New Zealand: 15% GST. Singapore: 9% (rising). UAE: 5% VAT. Some items exempt or zero-rated (education, healthcare).

Do I charge GST on all products and services?

Not all items subject to GST. GST-free: basic groceries, healthcare, education, exports. Input-taxed: financial services, residential rent. Taxable: most goods and services. Check your country's tax authority (ATO in Australia, HMRC in UK, IRS in US for sales tax). Register for GST when turnover exceeds threshold ($75K in Australia, £85K in UK).

How do I register for GST?

Registration required when turnover exceeds threshold (varies by country). Australia: Register through ATO when turnover >$75K ($150K non-profits). UK: Register through HMRC at £85K threshold. Must charge GST on sales, can claim GST credits on purchases. File returns quarterly or monthly. Penalties for late filing. Use accounting software for compliance.

Can I claim GST credits?

If GST registered, claim input tax credits on business purchases. Conditions: Have tax invoice, used for business, GST charged by supplier. Examples: Equipment, supplies, services. Can't claim: Personal expenses, GST-free items, non-business use. Input tax credits reduce net GST payable. Maintain records for 5-7 years (varies by country).

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