How to Register for GST in Singapore

Registering for Goods and Services Tax (GST) is an important milestone for businesses operating in Singapore. GST is a consumption tax applied to most goods and services, and joining the GST system ensures your business is aligned with local tax regulations. 

For many businesses, GST registration in Singapore​ isn’t just about compliance. It sets you up to charge GST on taxable sales, claim GST on eligible business expenses, and streamline your tax reporting. In this “how to” for GST registration, we’ll explain how the process works and provide tips for staying tax compliant. 

Key takeaways

• Businesses must register for GST when their taxable turnover exceeds SGD 1 million (or they may choose to register voluntarily).
• GST registration allows businesses to charge GST and claim input tax credits.
• Registration can be completed online through the myTax Portal.
• Some businesses making wholly or substantially zero-rated supplies may qualify for GST registration exemptions.
• After registering, businesses must meet key compliance requirements including quarterly GST filing and timely payments.
• GST registration must be cancelled within 30 days once a business becomes ineligible or ceases operations.

What is GST in Singapore?

Introduced in 1994, the GST is a tax that applies to almost all goods and services sold in Singapore. Its purpose is to create a stable and sustainable revenue stream for the country while keeping income taxes competitive. The GST is ultimately paid by consumers, but businesses play a key role in collecting and reporting it to the Inland Revenue Authority of Singapore (IRAS).

GST works on a value-added model where businesses charge GST on their sales and can claim back GST paid on eligible business purchases. In practice, this means:

• Consumers pay GST as part of the final price of goods or services.
• Businesses collect GST on sales, claim input tax credits, and report the difference to IRAS.

Learn more in the IRAS guide to the GST.

Types of GST registration

Singapore offers two types of GST registration to accommodate the different stages and structures of growing businesses. These options ensure that companies register at the right time based on their revenue and business model. Here’s a quick overview of the two categories:

• Voluntary registration: Businesses that have not met the mandatory turnover threshold can choose to register for GST voluntarily. This is often beneficial for companies that incur significant GST-eligible expenses or plan to work with GST-registered clients. Once approved, businesses must stay registered for at least two years and comply with all GST reporting and record-keeping requirements.
• Mandatory registration: Businesses must register for GST when their taxable turnover exceeds SGD 1 million over the past 12 months or is expected to exceed this amount in the next 12 months. Registration must be completed within 30 days of meeting the threshold. Once registered, businesses are required to charge GST on taxable supplies and file GST returns regularly for as long as they remain in operation.

More information about this can be found in this IRAS guide to GST registration. 

Benefits of registering for GST

Registering for GST can offer practical financial and operational advantages, especially for growing businesses. By joining the GST system, businesses can streamline tax management, reinforce their credibility, and improve visibility over their financial health. Key GST registration benefits include:

• Ability to claim input tax credits, allowing businesses to recover GST paid on eligible purchases and reduce overall operating costs.
• Enhanced credibility with suppliers, partners, and corporate clients who may prefer working with GST-registered businesses.
• Simplified tax compliance, as GST reporting encourages better record-keeping and clearer financial tracking.
• Improved readiness for growth, especially for businesses planning to expand or enter partnerships that require GST registration.

Who needs to register for GST

Businesses in Singapore must register for GST when they meet certain turnover thresholds or carry out specific activities that fall within GST legislation. The rules are designed to ensure that growing businesses contribute to the GST system once they reach a meaningful level of taxable revenue. Registration requirements apply to both local and overseas businesses operating in Singapore.

You must register for GST if:

• Your taxable turnover exceeds SGD 1 million over the past 12 months under the retrospective basis. This includes all revenue from taxable goods and services.
• You expect your taxable turnover to exceed SGD 1 million in the next 12 months under the prospective basis (often due to new contracts, expansion, or business forecasts).
• You operate an overseas business supplying taxable goods or services in Singapore, as GST rules apply regardless of where the business is based.
• You provide certain types of imported digital services or remote services, which may trigger GST obligations even without a physical presence in Singapore.

Businesses can also choose to register voluntarily if it benefits their operations.

How to register for GST in Singapore

Registering for GST involves submitting an application to the IRAS and ensuring your business meets all eligibility and documentation requirements. The process is handled online through myTax Portal.

Before applying, businesses must:

• Determine whether registration is mandatory or voluntary, based on taxable turnover.
• Complete the e-Learning course (GST Assisted Self-Help Kit) if applying voluntarily and not exempt from the requirement.
• Ensure all business details are updated with ACRA or the relevant regulatory body.

When you’re ready to apply, you’ll need to submit:

• Business registration details and ownership information
• Financial statements or revenue records
• A declaration of taxable turnover
• Supporting documents for voluntary registration, if required

After submitting your application through the myTax Portal, IRAS will review your documents and may request clarifications. Approval typically takes two to four weeks, and once approved, you will receive a GST registration number and an official registration date. From that point, you must charge GST on taxable supplies and file regular GST returns.

Learn more about applying for GST registration.

Registration exemptions

Some businesses may be exempt from GST registration even if they exceed the registration threshold. This generally applies to businesses making wholly or substantially zero-rated supplies. Zero-rated supplies are taxable but charged at 0%, such as certain international services or exports. If your business falls into this category, you may apply for an exemption when you register. 

How to check your GST registration

It’s easy to do a quick GST registration check​ by searching for your details using the IRAS GST Register. This online tool allows you to verify your GST registration number, status, and effective date. Simply enter your business name or unique entity number (UEN) to view the information. 

GST registration requirements

Once your business is registered for GST, it’s essential to meet specific compliance obligations to avoid penalties and keep your tax affairs in good standing. These requirements cover deadlines, filing and payment responsibilities, proper recordkeeping, and the process for cancelling your GST registration when it’s no longer needed.

Deadlines and penalties 

Businesses that meet the mandatory GST registration threshold must apply within 30 days of becoming liable. This applies whether you cross the SGD 1 million turnover mark retrospectively over the past 12 months or expect to exceed it in the coming 12 months. Missing this deadline can lead to significant consequences.

If a business fails to register on time, IRAS may impose:

• A late registration fine, which can include a financial penalty.
• Backdated GST obligations, meaning you may have to account for and pay GST on past sales made from the date you were required to register.
• Additional penalties if non-compliance continues, including fines on unpaid GST.

Filing and payment of GST

Once registered, businesses must file GST returns (GST F5) on a quarterly basis, unless IRAS assigns a different filing frequency. Each return reports the GST you’ve charged on sales and the GST you’ve paid on eligible business purchases. Returns must be filed within one month after the end of each accounting period, even if you have no transactions to report.

GST payments are made through the myTax Portal, and businesses are encouraged to use GIRO for automatic deduction to avoid late payments. If GST is payable, it must be settled by the same due date as the return. 

Learn more about the GST filing process.

Recordkeeping

GST-registered businesses must maintain accurate and complete records to support every figure reported in their GST returns. These records must clearly show all taxable and non-taxable transactions, including invoices, receipts, credit notes, import/export documents, and accounting statements. Records can be kept in either digital or physical format, as long as they are legible, easily retrievable, and stored in a way that preserves their integrity.

IRAS requires businesses to retain GST-related records for at least five years, even if the business ceases operations or deregisters for GST before that period ends. To make sure your business is keeping accurate records, a cloud-based platform such as Intuit QuickBooks can help. With automated processes for tracking GST and tracking expenses, you can spend less time on compliance-related tasks, and put more energy into growing your business.

Cancelling your GST registration

A business may cancel its GST registration when it stops making taxable supplies or is no longer liable for registration. This typically applies if the business has ceased operations, changed its business model, or no longer expects its taxable turnover to exceed the registration threshold. To cancel, you must submit an application through the myTax Portal, providing supporting documents that confirm your change in circumstances.

IRAS requires businesses to apply for cancellation within 30 days of becoming eligible. After approval, you must continue to file GST returns up to the effective deregistration date and account for any GST due on remaining business assets. 

Stay tax compliant with Intuit QuickBooks

GST registration is an important step for Singaporean business owners. Understanding how GST works helps businesses meet key requirements such as timely filing and accurate recordkeeping. 

Designed to support small and mid-sized businesses, Intuit QuickBooks makes it easy to manage all aspects of your finances. Whether you’re sending invoices or applying for a GST refund, QuickBooks takes the stress out of tax compliance. You can even manage your business remotely using the QuickBooks app.

Try QuickBooks today to streamline your accounting and stay confident at tax time.