When Does Your Singapore Company Need to Register for GST?

GST (Goods and Services Tax) is Singapore's consumption tax, equivalent to VAT in Europe or sales tax in the US. Unlike corporate income tax, GST is not a tax on your profits — it's a tax on the value of goods and services you supply to customers, collected on behalf of IRAS. Understanding when and why to register is essential for growing Singapore businesses.

The GST Rate in Singapore

Singapore's GST rate is currently 9%, following increases from 7% (pre-2023) to 8% (2023) to 9% (from 1 January 2024). There are no announced plans for further increases in the near term.

Not all supplies are taxed at 9%. The three categories are:

• Standard-rated supplies (9%): Most goods and services supplied in Singapore
• Zero-rated supplies (0%): Exports of goods, international services (the GST rate is 0% but you can still claim input tax credits)
• Exempt supplies: Financial services, sale and lease of residential properties, import/supply of precious metals under Investment Precious Metals scheme (no GST charged, no input tax credits)

Compulsory GST Registration: When You Must Register

Registration becomes compulsory under two circumstances:

Retrospective Basis

At the end of any calendar year (1 January to 31 December), if your taxable turnover for that 12-month period exceeded S$1 million, you must register for GST within 30 days of the end of that year. Your GST registration will be effective from 1 March of the following year (i.e., two months after you apply).

Prospective Basis

At any point during the year, if you have reasonable grounds to expect that your taxable turnover for the next 12 months will exceed S$1 million, you must register within 30 days of making that determination. Examples include signing a large contract or having credible sales forecasts exceeding S$1 million.

What Counts as "Taxable Turnover"?

Taxable turnover includes the value of all standard-rated and zero-rated supplies made in Singapore. It does not include:

• Exempt supplies (financial services, residential property)
• Out-of-scope supplies (supplies made outside Singapore)
• Sale of capital assets (e.g., selling your company's equipment)
• Grants and subsidies received from the government

For most service businesses, taxable turnover is essentially your total revenue from Singapore customers.

Voluntary GST Registration

Even if your turnover is below S$1 million, you can voluntarily register for GST. This is worth considering in specific situations.

When Voluntary Registration Makes Sense

• B2B business with high expenses: If you spend heavily on GST-bearing inputs (office rent, software, equipment, professional services) and your customers are mostly GST-registered businesses who can recover the GST you charge them, voluntary registration lets you claim back significant input tax.
• Export-heavy business: If you export goods or provide international services, your supplies are zero-rated (0% GST) but you can still claim back input tax on your Singapore expenses. This effectively lets the government subsidise your operating costs.
• Startup with large setup costs: If you're investing heavily in equipment, fit-out, or software before generating revenue, voluntary registration lets you recover input GST on those costs.

When to Avoid Voluntary Registration

• B2C business with price-sensitive customers: If your customers are individuals or small businesses that cannot recover GST, adding 9% to your prices reduces your competitiveness.
• Low-margin businesses: The administrative burden of quarterly GST returns may not be worth it if the input tax refunds are small.
• Business with minimal GST-bearing expenses: If most of your costs are salaries (not subject to GST), there's little input tax to recover.

How to Register for GST

GST registration is done via the myTax Portal (mytax.iras.gov.sg) using your company's Corppass login. The process:

1. Log in to myTax Portal with Corppass
2. Navigate to GST → Apply for GST Registration
3. Complete the online application (business details, estimated taxable turnover, bank account for refunds)
4. Upload supporting documents if required
5. IRAS reviews and processes your application (typically 1–3 weeks)
6. Receive GST registration number and effective date

GST Filing: Quarterly Returns

Once registered, you must file quarterly GST returns (Form GST F5) via myTax Portal within 1 month of the end of each accounting period. Most companies file for these quarters:

• January–March → due by 30 April
• April–June → due by 31 July
• July–September → due by 31 October
• October–December → due by 31 January

Your return must show:

• Total value of supplies (standard, zero-rated, and exempt)
• Output tax collected (9% × standard-rated supply value)
• Input tax paid on business purchases (recoverable GST)
• Net GST payable or refundable

Input Tax Claims: Recovering GST You've Paid

As a GST-registered business, you can claim back the GST you've paid on business expenses — this is called input tax. Common claimable inputs include:

• Office rent (GST-registered landlords charge GST)
• Professional services (accounting, legal, consulting fees from GST-registered firms)
• Business software and SaaS subscriptions (local providers)
• Office equipment, furniture, and computers
• Marketing and advertising services

You cannot claim input tax on: staff entertainment (above certain limits), purchase or lease of motor cars, medical expenses for staff (unless business needs), private or personal expenditure.

B2B vs B2C: Impact on Your Business

B2B Scenario

If you supply a GST-registered Singapore company, your customer can recover the GST you charge them as input tax. So your 9% GST is effectively neutral for them — it's a cash flow consideration (they pay it now, recover it next quarter) rather than a real cost. B2B businesses generally have less pricing resistance to GST registration.

B2C Scenario

If you supply individual consumers, they cannot recover the GST. Your effective prices go up by 9%. If your competitors are not GST-registered (below the threshold), you may face price competition. Consider whether you can absorb the GST in your pricing or whether it genuinely pushes customers away.

Overseas Digital Services and GST

Since 1 January 2020, Singapore imposes GST on digital services consumed in Singapore by Singapore consumers, regardless of where the supplier is based. This is the Overseas Vendor Registration (OVR) regime.

If you are a foreign company supplying digital services (streaming, software, online courses, cloud services) to Singapore consumers and your annual global turnover exceeds S$1 million AND your Singapore sales to non-GST-registered customers exceed S$100,000, you must register for GST in Singapore and charge 9% GST.

For Singapore-incorporated companies selling digital services abroad: your supplies to overseas customers are generally zero-rated, meaning you charge 0% GST but can still claim input tax on your Singapore expenses.

Conclusion

For most early-stage Singapore startups, GST registration is not immediately relevant — the S$1 million threshold gives you ample runway before it's compulsory. Focus on building your revenue, and track your turnover quarterly as you scale. When you approach S$800,000 in annual taxable turnover, start planning for registration with your accountant so you're not caught by the prospective threshold.

If you're a B2B or export-heavy business, consider voluntary registration early to recover input tax on your growing expense base. Karman's accounting team can advise on the optimal timing for your specific business model.