GST Calculator: Goods and Services Tax and Total
Work out the goods and services tax on a price and the total payable, for a country that levies GST.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | GST | Total |
|---|---|---|
| $800 net · 5% | $40.00 | $840.00 |
| $800 net · 10% | $80.00 | $880.00 |
| $1,500 net · 15% | $225.00 | $1,725.00 |
| $300 net · 18% | $54.00 | $354.00 |
How This Calculator Works
Enter the net amount and the GST rate for the country of sale. The calculator multiplies the amount by the rate to find the GST, then adds it for the total. GST is a value-added consumption tax used in Canada, Australia, India, New Zealand, Singapore, and elsewhere, though the rate differs sharply between them.
The Formula
Percentage Add-On
Rate is the tax or tip percentage applied to the amount
Worked Example
On a net amount of $800 at a 5% GST rate, the GST is $40 and the total is $840. A 5% rate is the federal GST in Canada; other countries set their GST much higher, so the rate matters more than any default.
Key Insight
GST rates vary enormously — 5% in Canada, 10% in Australia, 15% in New Zealand, and higher in India. Some countries also stack a provincial or state tax on top, so always confirm the combined rate for the place of sale.
Australian GST — the simplest model
Australia GST 10% flat rate (no different slabs). Simple structure. Implementation 2000 replacing wholesale sales tax.
Exemptions. Fresh food, basic groceries, healthcare, education, financial services exempt. Most other goods/services subject to GST.
Annual threshold. Businesses with $75K+ annual turnover must register and collect GST. Below threshold: voluntary registration; not required.
Cross-border. Imports under AUD 1,000 GST-free historically; changed 2018 to require GST on all imports. Affects e-commerce purchases from overseas.
Strategic implementation. Most Australian retailers display GST-inclusive pricing (advertised price includes GST). Different from U.S. where sales tax added at checkout.
India GST — multiple slabs
India GST 2017 — most ambitious tax reform in modern Indian history. Replaced 17 different federal/state taxes. Created national common market.
Multiple slabs. 0% on essential goods (basic food, education, healthcare); 5% on common items; 12% on standard goods; 18% (most common rate); 28% on luxury/sin goods (cars, tobacco, sugar drinks). Different slabs create complexity but reflect equity considerations.
Compliance burden. Businesses must register for GSTIN (GST identification number). Monthly returns. E-invoicing for substantial transactions. Substantial administrative cost particularly for smaller businesses.
Modifications. Continuous adjustment of which items fit which slab. Periodic GST Council meetings decide rate changes. Specific items move between slabs based on political and policy considerations.
GST rates by jurisdiction (2024)
Reference GST rates and structures by country.
| Country | Standard GST | Structure |
|---|---|---|
| Australia | 10% | Single rate |
| New Zealand | 15% | Single rate |
| Singapore | 9% | Raised from 7% in 2024 |
| Canada (federal GST) | 5% | Plus province |
| Canada (HST provinces) | 13-15% | Combined federal+provincial |
| India | 0/5/12/18/28% | Multiple slabs |
| Malaysia (SST replacing GST) | 6-10% | Sales/service split |
GST and VAT are functionally similar consumption taxes — different names by jurisdiction. Australia GST simpler than EU VAT due to single rate. India GST most complex due to multiple slabs. Singapore GST raised from 7% to 8% (2023) to 9% (2024) to fund aging population costs — pattern likely to continue elsewhere.
Frequently Asked Questions
What is GST?
Goods and services tax is a value-added consumption tax charged on most sales. It works much like VAT: businesses collect it on sales and reclaim it on purchases, with the consumer bearing the final cost.
How is GST different from VAT?
Mechanically they are almost identical consumption taxes; the name simply differs by country. Some GST countries also add a separate provincial or state sales tax alongside it.
What GST rate should I enter?
Use the rate for the country of sale — for example 5% in Canada or 10% in Australia. Where a provincial tax also applies, enter the combined rate.
Is GST included in displayed prices?
It depends on the country. Australia includes GST in displayed prices, while in Canada GST is often added at the register. Check local convention.
Can businesses reclaim GST?
Registered businesses generally reclaim the GST paid on their purchases, so GST is not a final cost for them. The tax falls on the end consumer.
When is this calculator unreliable?
For India where multiple slabs apply (0/5/12/18/28% — actual rate depends on specific goods classification). Also unreliable for Canada where federal GST 5% combines with provincial HST or separate PST (combined rate varies by province). Always verify applicable rate by jurisdiction and product.
References & Authoritative Sources
- Australian Taxation Office (ATO) — GST Information · consulted June 1, 2026 · Australian tax regulator
- Canada Revenue Agency (CRA) — GST/HST Information · consulted June 1, 2026 · Canadian tax regulator
- Goods and Services Tax Council (India) — India GST Information · consulted June 1, 2026 · Indian GST regulator
Related Calculators
Data Sources & Benchmarks
This calculator draws on 2 independent, dated sources.
Methodology & Review
GST (Goods and Services Tax) equals net amount × GST rate. The calculator returns GST and total. Major GST jurisdictions: Australia GST 10%; India GST 0%/5%/12%/18%/28% (multiple slabs); Canada GST 5% federal + 0-15% provincial HST; New Zealand GST 15%; Singapore GST 9% (raised from 7% in 2024). GST mechanism similar to VAT — collected at each stage with input credits. RELIABILITY: Reliable for documented rate. Less reliable for India (multiple slabs with different applicability) or Canada (federal GST plus separate provincial structures). Verify applicable rate by jurisdiction and product type.
Updated