GST and VAT Explained — Complete Guide to Goods and Services Tax for Every Country

Goods and Services Tax (GST) and Value Added Tax (VAT) are the primary indirect taxation systems used by most countries in the world. Whether you are a business owner calculating prices, a consumer wanting to understand what you are paying, a student studying taxation, or a professional working across multiple countries — understanding how GST and VAT work is an essential financial skill. This complete guide explains exactly what GST and VAT are, how they are calculated, how they work in different countries, and the practical implications for businesses and consumers.

What is GST and VAT?

GST (Goods and Services Tax) and VAT (Value Added Tax) are both consumption taxes — taxes levied on the consumption of goods and services rather than on income or profit. Despite their different names they operate on essentially the same principle: tax is collected at each stage of the supply chain on the value added at that stage, with the final consumer bearing the full tax burden.

The key difference from a sales tax — used in some US states — is that GST and VAT are collected incrementally at each stage of production and distribution rather than only at the point of final sale. This multi-stage collection mechanism is what makes GST and VAT so effective at preventing tax evasion.

Where GST is used: Australia, India, Canada, Singapore, New Zealand, Malaysia, and several other countries.

Where VAT is used: All European Union countries, United Kingdom, most of Africa, Middle East, and Latin America.

Despite the different names the mechanics are essentially identical. India’s GST and the UK’s VAT work in the same fundamental way — they just have different names, rates, and specific rules.

How GST and VAT Work — The Value Added Principle

The defining feature of GST and VAT is that tax is collected at every stage of the supply chain but only on the value added at each stage. Businesses registered for GST or VAT charge it on their sales (output tax) but can reclaim the tax they paid on their purchases (input tax). Only the net difference — output tax minus input tax — is remitted to the government.

This input tax credit mechanism ensures that tax is collected efficiently throughout the supply chain without cascading (tax being charged on tax) — the major flaw of older turnover taxes that GST and VAT replaced.

A Complete Supply Chain Example

A wooden chair passes through four stages of production and sale. GST rate is 10%:

Stage 1 — Timber merchant:

• Sells timber to furniture manufacturer for $100
• Charges $10 GST (10% of $100)
• Remits $10 to government (no input credits — first in chain)
• Customer pays: $110

Stage 2 — Furniture manufacturer:

• Buys timber for $110 (paid $10 GST)
• Adds value through manufacturing — sells chair to wholesaler for $300 plus $30 GST
• Input tax credit: $10 (GST paid on timber purchase)
• GST remitted to government: $30 − $10 = $20
• Customer pays: $330

Stage 3 — Wholesaler:

• Buys chair for $330 (paid $30 GST)
• Adds value through distribution — sells to retailer for $400 plus $40 GST
• Input tax credit: $30 (GST paid on chair purchase)
• GST remitted to government: $40 − $30 = $10
• Customer pays: $440

Stage 4 — Retailer:

• Buys chair for $440 (paid $40 GST)
• Sells to consumer for $600 plus $60 GST
• Input tax credit: $40 (GST paid on chair purchase)
• GST remitted to government: $60 − $40 = $20
• Consumer pays: $660

Total GST collected by government: $10 + $20 + $10 + $20 = $60

GST on final consumer price: $600 × 10% = $60 ✓

The total government revenue equals exactly 10% of the final consumer price — regardless of how many stages the product passes through. This elegance is the genius of the VAT/GST system.

How to Calculate GST and VAT

Adding GST to a Price (Tax-Exclusive Price → Tax-Inclusive Price)

When you know the pre-tax price and need to find the price including GST:

GST amount = Price × (GST rate / 100) Final price = Price + GST amount

Or in a single step: Final price = Price × (1 + GST rate / 100)

Example — Adding 18% GST: Product price (excluding GST): $500 GST amount = $500 × 18/100 = $90 Final price = $500 + $90 = $590

Or: $500 × 1.18 = $590

Removing GST from a Price (Tax-Inclusive Price → Tax-Exclusive Price)

When you know the GST-inclusive price and need to find the original price before tax:

Original price = Final price / (1 + GST rate / 100) GST amount = Final price − Original price

Example — Removing 18% GST from $590: Original price = $590 / 1.18 = $500 GST amount = $590 − $500 = $90

Common mistake: Many people incorrectly calculate the GST by multiplying the inclusive price by the GST rate. For 18% GST they multiply $590 × 18% = $106.20 — this is wrong. The correct GST is $90. The correct method is always to divide by (1 + rate) first.

Quick GST Calculation Table

To add GST — multiply by:

GST Rate	Multiply by
5%	1.05
10%	1.10
12%	1.12
15%	1.15
18%	1.18
20%	1.20
28%	1.28

To remove GST — divide by the same number: A price including 20% VAT: divide by 1.20 to get the pre-tax price.

Use the CalcGlobe GST Calculator to add or remove any GST or VAT rate instantly.

GST in India — A Complete Guide

India introduced its comprehensive GST system on 1 July 2017 — replacing a complex web of multiple central and state taxes including central excise duty, service tax, VAT, central sales tax, entry tax, luxury tax, and numerous other levies. Indian GST is often described as one of the most ambitious tax reform projects in history — unifying 29 states and 7 union territories into a single common market with a uniform tax structure.

India GST Structure

Indian GST has a dual structure — both the central government and state governments levy GST simultaneously:

CGST (Central GST): Collected by the central government on intra-state (within the same state) supplies.

SGST (State GST): Collected by the respective state government on intra-state supplies. Each state has its own SGST legislation.

IGST (Integrated GST): Collected by the central government on inter-state (between different states) supplies and imports. The central government then distributes the state’s share to the destination state.

UTGST (Union Territory GST): Applies in union territories without a legislature (Chandigarh, Dadra and Nagar Haveli, Daman and Diu, Lakshadweep, Andaman and Nicobar Islands).

For intra-state transactions: Total GST = CGST + SGST (split equally — so 18% GST = 9% CGST + 9% SGST) For inter-state transactions: Total GST = IGST (full rate applied as IGST — no split)

India GST Tax Slabs

Slab	Rate	Examples
Exempt	0%	Fresh fruits and vegetables, milk, eggs, bread, salt, educational services, healthcare services
Lower	5%	Packed food items, footwear below ₹1,000, transport services, restaurants (without ITC)
Standard 1	12%	Processed food, mobile phones, computers, business class air travel
Standard 2	18%	Most services, manufactured goods, restaurants in hotels, IT services, financial services
Higher	28%	Luxury goods, automobiles, tobacco, aerated drinks, casinos, race clubs
28% + Cess	28% + cess	Sin goods and luxury items — additional cess levied on top of 28%

Composition Scheme: Small businesses with annual turnover below ₹1.5 crore (₹75 lakh for some states and service providers) can opt for the Composition Scheme — paying a flat lower rate (1–6% depending on business type) without the complexity of input tax credits. Composition dealers cannot collect GST from customers and cannot claim ITC.

India GST Registration

GST registration is mandatory for:

• Businesses with aggregate annual turnover above ₹40 lakh (₹20 lakh for service providers, ₹10 lakh in some special category states)
• Businesses making inter-state supplies regardless of turnover
• E-commerce operators and aggregators
• Casual taxable persons and non-resident taxable persons

Voluntary registration below the threshold is also available — beneficial for businesses wanting to claim input tax credits.

GST Returns in India

Registered GST taxpayers must file regular returns:

Return	Due Date	Purpose
GSTR-1	11th of following month (monthly) or quarterly	Outward supplies (sales)
GSTR-3B	20th of following month	Summary return and tax payment
GSTR-9	31 December	Annual return
GSTR-9C	31 December	Reconciliation statement (turnover above ₹5 crore)

Non-filing of returns attracts late fees of ₹50 per day (₹20 for nil returns) per return, plus interest at 18% per annum on unpaid tax.

HSN Codes

HSN (Harmonised System of Nomenclature) codes are internationally standardised 6-8 digit codes that classify goods. In India HSN codes determine the applicable GST rate. Businesses with turnover above ₹5 crore must use 6-digit HSN codes on invoices. Those between ₹1.5 crore and ₹5 crore use 4-digit codes. Below ₹1.5 crore HSN codes are optional.

VAT in the United Kingdom

The UK has operated a VAT system since 1973. Following Brexit the UK retained its own VAT system separate from the EU but operating on similar principles.

UK VAT Rates

Rate	Percentage	Applies to
Standard rate	20%	Most goods and services
Reduced rate	5%	Domestic energy (gas and electricity), children’s car seats, some renovation and conversion work, mobility aids for elderly people
Zero rate	0%	Food (most unprocessed food), children’s clothing and footwear, books and newspapers, most prescription medicines, passenger transport
Exempt	—	Financial services, insurance, education, health services, property letting

Important distinction — Zero-rated vs Exempt: Zero-rated goods are technically VAT-taxable at 0% — businesses selling zero-rated goods can still register for VAT and reclaim input VAT on their purchases. Exempt supplies are outside the VAT system — businesses making only exempt supplies cannot register for VAT and cannot reclaim input VAT.

UK VAT Registration

Businesses must register for VAT when their taxable turnover exceeds the VAT threshold in any rolling 12-month period. The threshold is reviewed annually in the UK budget.

Voluntary registration below the threshold is available and may be beneficial if the business makes significant taxable purchases on which it wants to reclaim input VAT.

Making Tax Digital (MTD)

The UK’s Making Tax Digital initiative requires all VAT-registered businesses to keep digital VAT records and submit VAT returns through MTD-compatible software. MTD for VAT became mandatory for all VAT-registered businesses in April 2022.

Flat Rate Scheme

Small businesses with taxable turnover below £150,000 can use the Flat Rate Scheme — paying a fixed percentage of gross turnover as VAT rather than calculating actual input and output VAT. The flat rate percentage varies by business sector (typically 6–16.5%). This simplifies administration but may result in paying more or less VAT than under the standard method depending on the business’s cost structure.

GST in Australia

Australia introduced GST on 1 July 2000 at a flat rate of 10% on most goods and services — replacing the previous Wholesale Sales Tax system.

Australian GST Rate and Coverage

Standard rate: 10% — applies to most goods and services

GST-free supplies (zero-rated):

• Most basic food items
• Medical and health services
• Educational courses
• Childcare
• Exports of goods and services
• Financial services (most)
• Residential rent

Input taxed supplies (exempt):

• Financial services
• Residential rent
• Precious metals (first supply)

Australian GST Registration

Businesses must register for GST if:

• Annual GST turnover is $75,000 or more ($150,000 for non-profit organisations)
• They provide taxi or ridesharing services (regardless of turnover)
• They want to claim fuel tax credits

BAS (Business Activity Statement)

Australian GST-registered businesses report and pay GST through the Business Activity Statement (BAS). Most small businesses lodge BAS quarterly — larger businesses lodge monthly. The BAS reports GST collected on sales (1A) and GST paid on purchases (1B) with the net amount remitted to or refunded by the Australian Taxation Office (ATO).

VAT in European Union Countries

All 27 EU member states operate VAT systems harmonised under EU VAT Directives. While the basic framework is standardised individual member states have flexibility in setting their own rates (within EU-mandated ranges) and applying reduced rates or exemptions to specific categories.

EU VAT Rate Structure

Rate Type	EU Rules	Typical Examples
Standard rate	Minimum 15%	Most goods and services
Reduced rate(s)	Minimum 5% (up to two reduced rates permitted)	Food, books, pharmaceuticals, hotels
Super-reduced	Below 5% (permitted for historical reasons in some states)	Some food, newspapers
Zero rate	0% (permitted where in force before EU accession)	Books, food in some states

Selected EU VAT rates (standard rate):

Country	Standard VAT Rate
Luxembourg	17% (lowest in EU)
Germany	19%
France	20%
Italy	22%
Netherlands	21%
Spain	21%
Poland	23%
Ireland	23%
Sweden	25%
Denmark	25%
Hungary	27% (highest in EU)

EU VAT Reforms — One Stop Shop (OSS)

From July 2021 the EU introduced the One Stop Shop (OSS) — allowing businesses selling goods or services to consumers in multiple EU countries to register for VAT in just one member state and file a single quarterly return covering all EU sales. This significantly reduced the administrative burden of cross-border EU selling.

GST in Canada

Canada has a federal GST of 5% plus provincial sales taxes that vary by province. Some provinces have harmonised their provincial tax with the federal GST into a single Harmonised Sales Tax (HST).

Canadian Tax Rates by Province

Province/Territory	Tax Type	Rate	Total
Alberta	GST only	5%	5%
British Columbia	GST + PST	5% + 7%	12%
Manitoba	GST + PST	5% + 7%	12%
Ontario	HST	—	13%
Quebec	GST + QST	5% + 9.975%	14.975%
Nova Scotia	HST	—	15%
New Brunswick	HST	—	15%
Prince Edward Island	HST	—	15%
Newfoundland	HST	—	15%
Saskatchewan	GST + PST	5% + 6%	11%

Canadian GST Registration

Businesses with annual taxable supplies exceeding CAD $30,000 must register for GST/HST. Small suppliers below this threshold may register voluntarily.

VAT and GST Rates Around the World

Country	Tax Name	Standard Rate
Australia	GST	10%
Brazil	Various (IPI, ICMS, ISS, PIS, COFINS)	Complex multi-rate system
Canada	GST + Provincial	5% + 0–10%
China	VAT	13% / 9% / 6%
European Union	VAT	17–27% (varies by country)
India	GST	0% / 5% / 12% / 18% / 28%
Japan	Consumption Tax	10% (8% for food)
Mexico	IVA	16%
New Zealand	GST	15%
Norway	VAT	25%
Russia	VAT	20%
Saudi Arabia	VAT	15%
Singapore	GST	9% (from 2024)
South Africa	VAT	15%
UAE	VAT	5%
United Kingdom	VAT	20%
United States	Sales Tax	0–10.25% (no federal VAT)

Note on the United States: The US is the only major developed economy without a federal GST or VAT. Instead US states levy their own sales taxes ranging from 0% (Oregon, Montana, New Hampshire, Delaware) to over 10% in some localities when state and local taxes are combined.

Input Tax Credit — The Most Important Concept for Businesses

Input Tax Credit (ITC) is the mechanism through which GST and VAT prevent double taxation in the supply chain. It allows registered businesses to claim a credit for the GST or VAT they have paid on their business purchases against the GST or VAT they collect on their sales.

ITC Eligibility Rules

To claim ITC most GST and VAT systems require:

• The supplier must be registered for GST/VAT
• A valid tax invoice must be held showing the supplier’s registration number, tax amount, and other required details
• The purchase must be for business purposes (not personal use)
• The tax must have actually been paid (or be due and payable)

ITC Restrictions

Most GST and VAT systems restrict ITC on certain categories of expenditure — typically where there is a risk of personal use or where policy reasons justify excluding the credit:

Common ITC restrictions:

• Entertainment and hospitality expenses (50% ITC in some jurisdictions)
• Motor vehicles (restricted or excluded ITC in many countries)
• Club memberships and recreational facilities
• Purchases relating to exempt supplies

ITC Example

A printing company (GST-registered) in Australia:

Item	Amount	GST (10%)	Net
Sales to clients	$50,000	Collected $5,000 output tax
Paper and ink purchased	$8,000	Paid $800 input tax
Equipment maintenance	$2,000	Paid $200 input tax
Staff costs (wages)	$15,000	No GST on wages
GST payable to ATO:		$5,000 − $1,000 = $4,000

The printing company remits only $4,000 — not the full $5,000 collected — because it reclaims $1,000 of input tax paid on its purchases.

Tax Invoices — Requirements and Importance

A tax invoice is the documentary evidence required to support an ITC claim. The requirements vary by jurisdiction but typically include:

Standard requirements for a valid tax invoice:

• The word “Tax Invoice” prominently displayed
• Supplier’s name and GST/VAT registration number
• Date of issue
• Description of the goods or services supplied
• Quantity and price
• GST/VAT amount separately shown OR a statement that the price includes GST/VAT and the rate
• Customer’s name and address (for larger amounts)

In India (GST invoice requirements):

• GSTIN of supplier
• Invoice number (consecutive, unique)
• Date of invoice
• GSTIN of recipient (for B2B transactions)
• HSN/SAC code for goods/services
• Tax rate and tax amount (CGST, SGST/IGST separately)
• Place of supply

Failure to issue a valid tax invoice or failure to hold one for purchases can result in denial of ITC — resulting in unexpected tax liability.

GST and VAT Audits and Compliance

Tax authorities in all jurisdictions conduct audits to verify the accuracy of GST and VAT returns. Common audit triggers include:

• Consistently high ITC claims relative to output tax
• Significant discrepancies between filed returns and third-party data
• Industry-specific compliance patterns
• Random selection
• Specific intelligence or referrals

Penalties for non-compliance:

In India late filing penalties of ₹50 per day per return plus 18% interest on outstanding tax. Fraud penalties up to 100% of the tax evaded.

In the UK penalties of up to 100% of unpaid VAT plus interest for deliberate non-compliance.

In Australia administrative penalties of 25–75% of the shortfall amount plus interest.

Common GST and VAT Mistakes

Charging GST on exempt supplies: Not all supplies are taxable. Charging GST on exempt or zero-rated supplies is incorrect — it creates a liability without a corresponding customer entitlement to claim ITC.

Missing the registration threshold: Many businesses fail to notice when they cross the GST registration threshold — resulting in a requirement to back-pay GST plus penalties and interest. Monitor turnover carefully as you approach the threshold.

Incorrectly calculating GST on GST-inclusive prices: As discussed earlier — to extract GST from an inclusive price you divide by (1 + rate), not multiply the inclusive price by the rate.

Not keeping adequate records: ITC claims can be disallowed in an audit if adequate records (tax invoices, receipts) are not maintained. Most jurisdictions require records to be kept for 5–7 years.

Claiming ITC on personal expenses: Only business-related expenses qualify for ITC. Claiming ITC on personal expenses is a common audit finding with potentially severe penalties.

Time of supply errors: GST is generally due when a supply occurs — typically when an invoice is issued or payment received, whichever is earlier. Delayed reporting of supplies is a common compliance issue.

Frequently Asked Questions

Q: What is the difference between GST and VAT? GST (Goods and Services Tax) and VAT (Value Added Tax) are different names for essentially the same type of tax — a multi-stage consumption tax collected at each stage of the supply chain with input tax credits preventing double taxation. Countries use different names based on historical and political preferences. Australia, India, Canada, Singapore, and New Zealand use GST. The UK, EU countries, and most of Africa and Latin America use VAT. The mechanics are virtually identical.

Q: Is GST charged on exports? In virtually all GST and VAT systems exports are zero-rated — meaning GST at 0% applies. Businesses can charge 0% GST on exports while still claiming full ITC on inputs used to produce the exported goods or services. This makes exported goods and services competitive internationally by ensuring they leave the country free of domestic tax. Importing countries then apply their own GST or VAT on importation.

Q: What is the difference between zero-rated and exempt supplies? Zero-rated supplies are taxable at 0% — the supplier charges 0% GST but can claim ITC on purchases related to making those supplies. Exempt supplies are outside the GST system entirely — the supplier cannot charge GST and cannot claim ITC on related purchases. Being exempt is therefore generally worse for businesses with significant input costs. Examples: in Australia basic food is zero-rated (GST-free) and financial services are input-taxed (exempt).

Q: Can I claim ITC on a purchase paid in cash without a tax invoice? In most jurisdictions no — a valid tax invoice is required to support an ITC claim. Cash purchases without a tax invoice generally cannot support ITC claims. This is by design — the tax invoice trail is the mechanism through which the government tracks the GST collected at each stage of the supply chain.

Q: What is reverse charge mechanism? Reverse charge is a mechanism used in certain circumstances where the recipient of a supply (rather than the supplier) is liable to pay the GST or VAT. It is commonly used for imported services (where the overseas supplier cannot register locally), transactions involving unregistered dealers, and certain specified goods and services. Under reverse charge the recipient pays the tax directly to the government rather than to the supplier — and then claims it back as ITC if eligible.

Calculate GST and VAT Instantly

Use the CalcGlobe GST Calculator to:

• Add GST or VAT to any price at any rate
• Remove GST or VAT from a GST-inclusive price
• Calculate CGST and SGST breakdown for Indian transactions
• Use quick rate buttons for Indian GST slabs (5%, 12%, 18%, 28%), UK VAT (20%), and Australian GST (10%)
• Calculate GST for any custom rate

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Disclaimer: This article is for educational and informational purposes only. Tax laws, rates, thresholds, and requirements change frequently and vary significantly by country, state, and individual circumstances. This article does not constitute tax advice. Always consult a qualified tax professional or chartered accountant for advice specific to your business or personal tax situation. Verify current rates and thresholds with your relevant tax authority before making any tax-related decisions.

Sources: Australian Taxation Office (ato.gov.au); HMRC VAT Guide (gov.uk/vat-businesses); Central Board of Indirect Taxes and Customs India (cbic.gov.in); Canada Revenue Agency (canada.ca); European Commission VAT information (ec.europa.eu); Inland Revenue Authority of Singapore (iras.gov.sg).