What Is GST? A Guide for UK Founders Trading or Expanding Abroad

Quick answer: GST (Goods and Services Tax) is a consumption tax charged on most goods and services in countries such as India, Australia, New Zealand, Canada, and Singapore. The UK doesn't have GST — it has VAT instead. But if you're a UK founder selling into, or setting up in, a GST country, you'll need to understand how it works.

What Is GST, Exactly?

What is GST? In short, it's a tax added to the price of most goods and services, collected at each stage of the supply chain and eventually passed on to the government. A manufacturer charges it to a wholesaler, the wholesaler charges it to a retailer, and the retailer charges it to the end customer — with each business able to reclaim what it paid earlier in the chain. This is the same broad mechanism as VAT: it's a consumption tax, not a tax on profit, and it's ultimately borne by the end consumer.

You won't find GST on a UK invoice. If you're trading only within the UK, the tax you'll deal with is VAT, not GST.

GST vs VAT: What's the Difference for UK Founders?

GST vs VAT is really a difference in naming and structure, not concept. Both are consumption taxes charged on goods and services, and both allow registered businesses to reclaim what they've paid on business costs. They differ in rates, thresholds, and how many bands of tax exist.

The UK's version, VAT, has a standard rate of 20%, and businesses must register once their taxable turnover passes £90,000 in any rolling 12-month period. GST-charging countries set their own rates and thresholds entirely independently, which is exactly why this trips founders up when they start selling abroad — assuming the VAT rules they know apply elsewhere is a common and costly mistake.

Which Countries Use GST?

If your customers, suppliers, or a new entity sit in one of these markets, it's worth understanding properly rather than guessing:

1. Australia — standard rate of 10%, registration required above AUD 75,000 turnover
2. New Zealand — standard rate of 15%, one of the simplest systems globally, with very few exemptions
3. Canada — federal rate of 5%, though most provinces add their own provincial sales tax or a combined Harmonised Sales Tax on top
4. Singapore — standard rate of 9% as of 2026, with registration required once global turnover passes SGD 1 million
5. India — reformed in September 2025 under GST 2.0, which simplified the old five-band system into three main slabs: 5% on everyday essentials, 18% as the standard rate for most goods and services, and 40% on luxury and sin goods.

No two systems are identical, so a rate or threshold that applies in one country tells you nothing reliable about another.

When Does a UK Business Need to Deal With GST?

Plenty of UK startups never touch it at all — but a few common scenarios bring it into play:

Selling goods or digital services directly to customers abroad. Many countries apply their rules to foreign sellers once turnover crosses a threshold, even without a local office. Digital products and subscriptions are especially likely to trigger this, since several countries specifically target overseas digital service providers.

Using local marketplaces or fulfilment centres. Storing stock in an overseas warehouse, or selling through a marketplace with local fulfilment, can create a registration obligation from the very first sale in some countries.

Setting up a local entity. This is usually where international expansion UK startup founders hit it head-on. If India is part of your roadmap, setting up an Indian subsidiary is the most common route in, and it almost always brings GST registration with it, alongside separate filing and invoicing obligations.

Working with local suppliers or contractors. Even without selling locally, paying GST on business costs abroad may be reclaimable — but only if you're registered correctly.

How to Register for GST From the UK

There's no single process — each country runs its own tax authority, portal, and rules, and GST registration looks different depending on where you're expanding. In India, that usually means GSTIN registration alongside registering your foreign company in India, since the two are handled as connected steps.

1. Confirm you've actually triggered a registration obligation. Registering too early adds admin for no benefit; registering too late risks backdated tax and penalties.
2. Gather local documentation. Most tax authorities ask for proof of UK incorporation, a local tax agent or representative, and bank details for that jurisdiction.
3. Apply through the relevant portal. Australia's ATO runs a simplified system for non-residents; Singapore's IRAS has a separate Overseas Vendor Registration route for digital sellers.
4. Set up ongoing filing. Returns are usually due monthly or quarterly, entirely separate from anything filed with HMRC.

This is exactly the kind of process that's easy to get half right from the UK, which is why most founders bring in specialist support before their first overseas sale rather than after.

Common Mistakes UK Founders Make When Expanding Into GST Markets

1. Assuming VAT and GST are interchangeable in every respect — rates, thresholds, exemptions, and filing frequency all differ by country.
2. Missing the registration point entirely — several countries expect registration well before turnover feels significant.
3. Not budgeting for local compliance — filing is usually separate from UK obligations, often with its own software requirements
4. Pricing without factoring the tax in — a product priced competitively in the UK can look expensive once it's added locally.
5. Leaving it until it's a problem — retroactive registration, with backdated tax and penalties, is far more painful than registering on time.

How VenturEasy Helps

Growing into a new market is exciting, but tax compliance shouldn't be the thing that slows you down. At VenturEasy, we work with UK startups on both sides of this — keeping your UK VAT position straightforward while our international taxation advisory covers exactly what GST registration and compliance will look like abroad, so expansion is something you plan for with confidence.

FAQs

Is GST the same as VAT?

They work the same way in principle — both are consumption taxes collected along the supply chain — but they're separate systems with different rates and rules.

Does a UK company need to register for GST?

Only if you're selling into, or operating within, a country that charges it and you meet that country's registration trigger. UK-only trading only ever involves VAT.

What's the rate I should plan for?

It depends entirely on the country — anywhere from 5% to 40% depending on the market and the type of goods or services.

Do I need a local tax agent to register?

In several markets, yes — a local fiscal representative is a legal requirement for non-resident registration, not just a convenience.

Expanding overseas? Book a free 15-min call to check your international tax setup.