Singapore GST Registration Check Guide (2026)
Understanding Goods and Services Tax (GST) requirements is essential for running a compliant business in Singapore. Whether you’re working with suppliers, onboarding clients, or managing your own tax obligations, knowing how to verify GST registration can protect your company from costly mistakes and regulatory issues.
What Is GST Registration in Singapore?
GST is a consumption tax levied on most goods and services supplied in Singapore, currently charged at 9%. Businesses that meet certain revenue thresholds or expectations must register with the Inland Revenue Authority of Singapore (IRAS) so they can charge and remit GST legally.
A business becomes GST-registered once IRAS approves its application and issues a registration number — a key identifier that must be shown on all taxable invoices.
Why You Should Do a GST Registration Check
Verifying whether a supplier or business is GST-registered is crucial because:
- You only claim input tax credits from GST-registered suppliers on your purchases.
- Paying GST to an unregistered entity may result in non-claimable input tax and compliance risks.
- Misleading GST information on invoices could suggest irregular or fraudulent activities.
A quick check protects your business and ensures your accounting and tax positions remain sound.
Top Ways to Check a Company’s GST Status
Here are the most reliable ways to confirm whether a business is GST-registered in Singapore:
- Use the Official IRAS GST Registered Business Search
IRAS provides a public search tool where you can enter a business’s Unique Entity Number (UEN) or name to see if they are on the GST register and find when their registration started.
This is the most authoritative method and should be your first stop for verification.
- Review Their Invoice
A valid GST invoice must display:
- The supplier’s GST registration number
- The GST amount charged
- A breakdown of prices with GST included
If any of this is missing while GST is charged, treat it as a warning sign.
- Ask Them Directly and Keep Records
Communication helps — just ask the supplier for proof of their GST registration and keep the exchange documented. This can be useful if IRAS ever reviews your accounts.
- Request Their GST Certificate
Every registered business receives an official GST certificate from IRAS with their registration number and dates. You can ask to see this as additional evidence.
When GST Registration Becomes Mandatory
Singapore law defines two main triggers for compulsory GST registration:
Retrospective Basis
If your taxable turnover exceeds S$1 million in a calendar year, you must register GST within 30 days of the year ending.
Prospective Basis
If at any time you reasonably expect your turnover to top S$1 million in the next 12 months (based on solid evidence like signed contracts), you must apply for GST registration within 30 days of forming that forecast.
Failing to register on time could lead IRAS to backdate your registration and require you to account for GST you should have collected previously.
Benefits of Being Registered (and Why It Matters)
Being GST-registered brings more than compliance — it offers real operational advantages:
- The ability to claim input tax credits on business purchases.
- Improved credibility with clients and partners who expect correct tax handling.
- Streamlined financial reporting and stronger accounting practices.
However, registration also means ongoing responsibilities such as filing GST returns and maintaining proper records — and this is where professional help can make a difference.
How WLP Can Support You
Managing GST properly doesn’t have to be overwhelming. WLP specialises in supporting Singapore businesses with end-to-end GST services, including:
- GST eligibility assessment — Determine if and when you should register.
- Registration assistance — Prepare and submit your GST application accurately.
- Compliance support — Handle ongoing filings and ensure timely return submissions.
- Supplier verification — Conduct GST registration checks on your partners and vendors.
With expert guidance from WLP, you can stay compliant, avoid costly errors, and focus on growing your business with confidence.
Final Thoughts
Regularly checking the GST registration status of your suppliers and understanding your own obligations are essential parts of running a compliant business in Singapore. By using the official IRAS tools, reviewing invoices carefully, and working with a knowledgeable provider like WLP, you can minimise risks while maximising tax efficiency.