GST and VAT

What Are GST and VAT?

GST (Goods and Services Tax) and VAT (Value Added Tax) are broadly equivalent consumption taxes — collected at each stage of the supply chain on the value added at that stage. By the time a product reaches the final consumer, it embeds a total consumption tax equal to the stated rate applied to the final sale price.

The key difference between GST and VAT is mostly terminology — both work the same way mechanically. Countries such as the UK, Ireland, and most of Europe use the term VAT; Australia, Canada, New Zealand, India, and Singapore use GST. In everyday use, the two terms are often interchangeable.

These taxes are distinct from income tax: they apply to consumption of goods and services, not to earned income. For Tax Atlas’s income tax calculations, GST/VAT is not included — but understanding it matters for calculating your true cost of living and effective tax burden.

How GST/VAT Works

Unlike a simple sales tax (which is charged only at the final sale to the consumer), GST/VAT is charged at every stage of production, with businesses claiming back the GST/VAT they paid on their inputs.

Example:

1. Manufacturer buys raw materials for $100 + 10% GST ($10) = $110 paid
2. Manufacturer sells product for $300 + 10% GST ($30) = $330 received
3. Manufacturer remits $30 − $10 = $20 net GST to the government (net of input tax credit)
4. Retailer buys for $330, sells for $500 + 10% GST ($50) = $550 received
5. Retailer remits $50 − $30 = $20 net GST to government

Total GST collected: $10 + $20 + $20 = $50 = 10% × $500 final sale price

The math ensures the total tax collected equals the headline rate times the final consumer price, regardless of how many production stages exist.

GST/VAT Rates by Country

Country	Tax name	Standard rate	Reduced/Exempt categories
United Kingdom	VAT	20%	5% on domestic fuel; 0% on food, children’s clothes, books
Ireland	VAT	23%	13.5% on hospitality; 9% on newspapers; 0% on food, medicine
Australia	GST	10%	0% on fresh food, medical, education, certain financial services
New Zealand	GST	15%	Very few exemptions — most goods and services taxed
India	GST	18% (standard)	0%, 5%, 12%, 18%, 28% — complex multi-rate structure
Canada	GST/HST	5% federal GST; 13–15% HST in participating provinces	0% on groceries, prescription drugs, medical devices
Singapore	GST	9%	Exempt: financial services, residential property, healthcare
South Africa	VAT	15%	0% on basic food items, certain agricultural products
United States	None (federal)	0% federal; 0–11% state sales tax	Varies by state — some exempt food, medicine

The United States is the only major economy without a federal consumption tax. Instead, each of the 50 states (and many cities/counties) levies its own sales tax — typically 5–10% — but only at the point of final sale, not at each production stage. This means the US system is a sales tax (not a VAT), collected only once from retailers, with no input tax credit mechanism.

India’s Multi-Rate GST System

India replaced its previous fragmented indirect tax system (excise duty, service tax, VAT) with a unified GST in 2017. The current rate structure has five main slabs:

• 0%: Basic food items (rice, wheat, fresh vegetables), health and education
• 5%: Household necessities, packed food, transport
• 12%: Processed food, business class air travel, computers
• 18%: Standard rate for most goods and services — telecom, IT services, financial services
• 28%: Luxury items — automobiles, tobacco, aerated drinks, casinos (plus additional Cess on some items)

This multi-rate structure creates significant compliance complexity for businesses operating across India’s 28 states and 8 union territories.

GST/VAT and Income Tax: The Total Tax Picture

Income tax calculators (including Tax Atlas) typically calculate direct taxes only — income tax and social contributions. To understand your full effective tax burden, you need to factor in GST/VAT on your consumption.

If you pay 25% income tax on your remaining income and then spend 20% of that on VAT, your overall effective burden on that spending is:

Total effective rate = 1 − (1 − 0.25) × (1 − 0.20) = 1 − 0.60 = 40%

High-consumption-tax countries like New Zealand (15% GST on almost everything) and Ireland (23% VAT) effectively add substantial additional burden on top of their income taxes.

Input Tax Credits for the Self-Employed

If you are self-employed and registered for GST/VAT, you can claim back the GST/VAT paid on your business inputs:

• A consultant registered for UK VAT at 20% can reclaim the VAT on their laptop, software subscriptions, office supplies, and other business expenses
• Registration threshold: UK VAT registration required when taxable turnover exceeds £90,000 in a 12-month period; Australia GST required at A$75,000; Singapore GST at S$1,000,000

Key Takeaway

GST and VAT are consumption taxes charged on the value added at each production stage. They are distinct from income tax but form part of your total tax burden as a consumer. Rates range from 9% in Singapore to 23% in Ireland. The US has no federal equivalent — only state-level sales taxes. Understanding GST/VAT alongside income tax gives a complete picture of your true tax burden in any country.