Sales Tax vs VAT vs GST: Differences Explained for Invoices

Quick answer: Sales tax vs VAT vs GST comes down to where the tax is collected. Sales tax is charged once, at the final sale to the consumer. VAT and GST are charged at every stage of the supply chain, with registered businesses reclaiming the tax they paid on purchases. GST is essentially VAT under another name. All three are paid by the end consumer.

If you invoice clients in different countries, you will meet all three terms, sometimes on the same day. A US client expects state sales tax on a separate line, a UK client expects VAT with your VAT number, and an Australian or Indian client expects GST with an ABN or GSTIN. This guide explains sales tax vs VAT vs GST in plain language, shows how each one moves through a supply chain with real numbers, and covers what each tax means for the invoices you send. You can apply any rate in the free invoice generator, which shows tax as its own line.

Important: This is general information, not tax advice. Rates, thresholds and rules for each tax change regularly and differ by country, state and province. Check the current rules with the relevant tax authority or a qualified adviser.

Sales tax vs VAT vs GST at a glance

Feature	Sales tax	VAT	GST
Where it is used	United States (state and local); some Canadian provinces as PST	UK, EU, UAE, Saudi Arabia and most other countries	Australia, Canada (federal), India, New Zealand, Singapore, Malaysia and others
When it is collected	Once, at the final retail sale	At every stage of the supply chain	At every stage of the supply chain
Business purchases for resale	Usually exempt with a resale certificate	Taxed, then reclaimed as input VAT	Taxed, then claimed as input tax credit
Who files returns	Retailers and sellers with nexus	Every registered business in the chain	Every registered business in the chain
Typical invoice title	"Invoice"	"VAT Invoice" or "Tax Invoice"	"Tax Invoice"
Seller tax ID on invoice	Not generally required	VAT number required	GST number (ABN, GSTIN, BN) required
Example standard rates	Combined state and local rates vary by address	UK 20%, UAE 5%, Saudi Arabia 15%	Australia 10%, Canada 5%, India mainly 5% or 18%

Rates in the table are standard rates for orientation; reduced, zero and special rates exist in most countries. Always check the current rate for your goods or services.

What is sales tax?

A retail sales tax is a single-stage tax collected by the seller at the point of sale to the final consumer. In the United States, there is no federal sales tax; each state decides whether to levy one, what rate to charge, and which goods and services are taxable. Counties, cities and special districts can add local rates, so the combined rate can differ between two addresses in the same state. Five states have no statewide sales tax.

Businesses that buy goods to resell usually do not pay sales tax on those purchases. Instead they give the supplier a resale certificate, and the tax is collected only when the goods reach a consumer. That is the core mechanism of sales tax: tax the last sale, and exempt the sales before it.

A seller must collect sales tax in states where it has nexus, a connection that can come from a physical presence or, since the 2018 Wayfair decision, from economic activity above a state's threshold. Our guide to sales tax on invoices in the US covers nexus, exempt customers and how to show the tax line.

What is VAT?

Value-added tax is a multi-stage tax. Every VAT-registered business in a supply chain charges VAT on its sales (output tax) and deducts the VAT it paid on its business purchases (input tax). It pays the difference to the tax authority. The effect is that each business pays tax only on the value it adds, and the full tax burden lands on the final consumer, who cannot reclaim it.

Because the credit depends on a valid invoice, VAT turns invoices into tax documents. A buyer cannot normally reclaim input VAT without an invoice that shows the supplier's VAT number, the rate and the VAT amount. That is why VAT invoices have stricter content rules than ordinary US invoices. Our VAT invoice guide lists the fields, and HMRC's VAT rates page shows the UK's standard, reduced and zero rates.

VAT systems also distinguish standard-rated, reduced-rated, zero-rated and exempt supplies. Zero-rated and exempt both show no VAT, but they have very different effects on what the seller can reclaim; see zero-rated vs exempt VAT.

What is GST?

Goods and services tax is the name several countries use for their value-added tax. Mechanically, GST works like VAT: registered businesses charge GST on sales, claim input tax credits for GST paid on purchases, and remit the difference. The differences are in local design:

• Australia: GST is 10%, with GST-free items such as most basic food. Registration is required once turnover reaches $75,000 ($150,000 for non-profits), and tax invoices show the seller's ABN.
• Canada: the federal GST is 5%. Participating provinces combine it with a provincial portion into a single harmonized sales tax (HST), while others charge GST plus a separate provincial sales tax (PST). The CRA's GST/HST pages list current rates.
• India: GST is split into central and state components (CGST and SGST) for sales within a state and integrated GST (IGST) for sales between states. Since 22 September 2025 the main slabs are 5% and 18%, with 40% for a short list of goods. See our GST invoice guide.

So when people compare sales tax vs VAT vs GST, the real divide is between single-stage sales tax and multi-stage VAT/GST. VAT vs GST is mostly a naming difference.

Worked example: tax through a three-step supply chain

A manufacturer sells a desk to a retailer for 400. The retailer sells it to a consumer for 600. Compare a 10% sales tax with a 10% VAT or GST (the same rate, to keep the comparison fair).

Under a 10% sales tax

Step	Sale price	Tax charged	Tax credit	Tax paid to government
Manufacturer to retailer (resale certificate)	400	0	None	0
Retailer to consumer	600	600 × 10% = 60	None	60
Total				60

Under a 10% VAT or GST

Step	Sale price	Output tax	Input tax credit	Net tax paid
Manufacturer to retailer	400	400 × 10% = 40	0	40 − 0 = 40
Retailer to consumer	600	600 × 10% = 60	40	60 − 40 = 20
Total				40 + 20 = 60

The government receives 60 either way, and the consumer pays 600 + 60 = 660 either way. What differs is who collects it and when. Under VAT, the manufacturer collects 40 at the first stage and the retailer adds the remaining 20 on its 200 of value added (200 × 10% = 20). If the retailer disappears without paying, the government has still collected 40 of the 60. That fractional collection is a key reason so many countries use VAT or GST rather than a retail sales tax.

You can check any of these figures with the sales tax calculator, which works for VAT and GST rates too.

How sales tax, VAT and GST change your invoice

The tax system decides which fields your invoice must carry. Here is a side-by-side view of a simple 1,000 sale:

Invoice element	US sales tax (8.25% example)	UK VAT (20%)	Australia GST (10%)
Title	Invoice	Invoice (with VAT details)	Tax invoice
Seller tax ID	Optional	VAT registration number	ABN
Net amount	$1,000.00	£1,000.00	A$1,000.00
Tax line	Sales tax 8.25%: $82.50	VAT 20%: £200.00	GST 10%: A$100.00
Total	$1,082.50	£1,200.00	A$1,100.00
Buyer can reclaim?	No (unless exempt purchase with certificate)	Yes, if VAT-registered	Yes, if GST-registered

The arithmetic: $1,000 × 0.0825 = $82.50; £1,000 × 0.20 = £200; A$1,000 × 0.10 = A$100. The 8.25% US figure is only an example; the real rate depends on the delivery address. For full field lists, see the invoice requirements by country comparison.

Tax-inclusive pricing

In many VAT and GST countries, consumer prices must be displayed including tax. To find the tax inside a tax-inclusive price, divide by 1 plus the rate. For a £120 price including 20% VAT: £120 ÷ 1.20 = £100 net, so the VAT is £120 − £100 = £20. A common mistake is to take 20% of £120 (£24), which overstates the tax by £4.

Cross-border invoices: which tax applies?

When you sell across borders, the comparison of sales tax vs VAT vs GST matters less than the place-of-supply rules, which decide which country's tax applies at all. Common patterns:

• Exports of goods are usually zero-rated for VAT and GST, with proof of export kept on file.
• B2B services to a foreign business are often outside the scope of your VAT or subject to the reverse charge in the customer's country. The invoice shows no VAT plus a reverse charge note; see our reverse charge invoice guide.
• Digital services to foreign consumers may require you to register and charge the customer's local VAT or GST.
• US sales tax generally does not apply to exports, and many services are not taxable at all, depending on the state.

Our guide to invoicing international clients covers currencies, wording and payment.

Checklist: getting tax right on your invoices

• Know which tax system applies to each sale: sales tax, VAT, GST, or none.
• Confirm you are registered (or have nexus) before adding any tax.
• Show your tax ID where the system requires it.
• Collect the customer's tax ID for B2B and cross-border sales.
• Show the net amount, tax rate and tax amount for each rate, then the total.
• State whether prices include or exclude tax.
• Add wording for zero-rated, exempt or reverse-charged items.
• Keep resale or exemption certificates for untaxed US sales.
• Check rates when they change, and keep invoices for the required period.

Common mistakes

• Treating VAT like sales tax. Businesses new to VAT sometimes forget to reclaim input tax, or charge VAT before registering.
• Treating sales tax like VAT. US sellers sometimes expect to reclaim sales tax paid on business purchases; usually they cannot.
• Using the wrong rate because they used a state rate without local add-ons, or an old GST slab.
• Calculating tax on a tax-inclusive price by multiplying instead of dividing.
• Charging domestic VAT on a reverse-charge service, which leaves the customer unable to reclaim it.
• Merging different rates into one tax line on a mixed invoice.
• Not stating the tax basis, leaving the client unsure whether the price is gross or net.

Create an invoice with the right tax line

Whichever tax applies, the invoice structure is the same: net, tax rate, tax amount, total. Open the USA invoice generator for sales tax or the UK invoice generator for VAT, set the rate, and add your tax ID and any reverse charge or exemption note. A clean layout such as the Minimal invoice template keeps the tax block easy to read. Confirm current rates with the relevant authority before you send.