What You Need to Know About Singapore Sales Tax (GST)

Singapore raised its GST to 9% on 1 January 2024, the first increase in over a decade, and the S$1 million compulsory registration threshold means most growing businesses will eventually need to charge it. Quarterly GST F5 returns filed through IRAS's myTax Portal keep the process predictable, but late filings attract an immediate S$200 penalty that compounds monthly. Here is everything you need to know to register, file, and claim your input tax correctly.

1. What is GST?

GST is a broad-based consumption tax charged on the supply of goods and services in Singapore. It is administered by the Inland Revenue Authority of Singapore (IRAS).

The current GST rate is:

9% on the supply of goods and services made in Singapore (effective from 1 January 2024)

GST applies to most goods and services, but some supplies are exempt or zero-rated:

Zero-rated supplies (0%): Exports of goods and international services
Exempt supplies: Sale and rental of residential properties, and most financial services
Out-of-scope supplies: Private transactions and supplies outside the scope of GST

2. Who does it apply to?

This usually applies to:

Businesses with annual taxable turnover exceeding S$1 million (compulsory registration)
Businesses that voluntarily register for GST (even if below the threshold)
Businesses that expect to exceed S$1 million in the next 12 months
Overseas vendors supplying digital services to Singapore consumers (under the Overseas Vendor Registration regime)
Businesses importing goods valued above S$400

3. Why does it matter?

Understanding GST helps you:

Stay compliant with IRAS and avoid penalties
Avoid surcharges and interest on late filings
Keep proper records of all output tax and input tax claims
File and pay correctly using the GST F5 return
Plan your cash flow better by setting aside collected GST

4. How does it work?

Here's the basic process:

Register for GST with IRAS when your taxable turnover exceeds S$1 million (or voluntarily before that)
Charge 9% GST on your taxable supplies
Issue tax invoices for all taxable supplies
Keep records of GST collected on sales (output tax) and GST paid on purchases (input tax)
File your GST return (Form GST F5) with IRAS quarterly
Pay the difference between output tax and input tax, or receive a refund if input tax exceeds output tax

5. What forms are involved?

GST F5 (GST Return) - The main quarterly return filed with IRAS to report output tax, input tax, and net GST payable or refundable
GST F7 (Disclosure of Errors) - Used to voluntarily disclose errors in previously filed GST returns
GST F8 (Application for Exemption from Registration) - Used to apply for exemption from GST registration if your supplies are mainly zero-rated
Tax Invoice - Required for all taxable supplies. Must include your GST registration number, the GST amount, and other prescribed details

6. What information do you need?

Before handling GST, make sure you have:

Your GST registration number
Records of all taxable supplies and output tax collected
Records of all business purchases and input tax paid
Tax invoices for all transactions
Details of any zero-rated, exempt, or out-of-scope supplies
Import permits and customs declarations (for imported goods)
Access to myTax Portal on IRAS website

7. Important deadlines

Filing frequency: Quarterly (default). Monthly or semi-annual filing may be approved by IRAS in special cases
Payment deadline: One month after the end of each prescribed accounting period (quarter)
Registration deadline: Within 30 days of the date you become liable for registration

Quarterly GST F5 due dates (for calendar year quarters):

Q1 (January-March): due 30 April
Q2 (April-June): due 31 July
Q3 (July-September): due 31 October
Q4 (October-December): due 31 January

If you file and pay electronically through GIRO, you receive an additional 15 days for payment.

8. Common mistakes to avoid

Missing the S$1 million registration threshold and failing to register on time (late registration can result in backdated GST liability)
Claiming input tax on expenses not supported by valid tax invoices
Not accounting for GST on imported services under the reverse charge mechanism
Incorrectly zero-rating local supplies (zero-rating only applies to exports and international services)
Not filing a GST return even when there is no GST to pay (nil returns are required)
Forgetting to charge GST on deemed supplies (goods taken for private use or given away)
Not keeping records for the required 5-year retention period

9. Simple example

You run a consulting firm in Singapore and invoice a local client S$10,000 plus GST.

You charge 9% GST: S$10,000 x 9% = S$900
Your total invoice is S$10,900
During the same quarter, you spend S$4,000 plus GST on business expenses (office rent, software)
GST on expenses (your input tax): S$4,000 x 9% = S$360
Net GST payable: S$900 (output tax) - S$360 (input tax) = S$540
You pay S$540 to IRAS with your quarterly GST F5 return

If you provided the same consulting service to a client overseas, you would zero-rate the supply (0% GST) and could still claim the S$360 input tax as a refund.

10. FAQ

Q: Do I have to register for GST? A: You must register if your taxable turnover exceeds S$1 million in the past 12 months, or you reasonably expect it to exceed S$1 million in the next 12 months. You can register voluntarily below this threshold, but voluntary registration requires a minimum 2-year commitment.

Q: What is the reverse charge mechanism? A: If you are GST-registered and import services from overseas suppliers, you must account for GST on those services as if you had supplied them yourself. This applies if you are not entitled to full input tax credits.

Q: Can I claim input tax on all business purchases? A: You can claim input tax on purchases directly attributable to taxable supplies. You cannot claim input tax on expenses related to exempt supplies, medical expenses, club subscriptions, or motor vehicle expenses (with limited exceptions).

Q: What is the Tourist Refund Scheme? A: Tourists can claim a GST refund on goods purchased in Singapore and taken out of the country. This applies to purchases of S$100 or more from participating retailers.

Q: What happens if I file my GST return late? A: IRAS charges a late-filing penalty of S$200 immediately, increasing by S$200 for every additional month the return is overdue, up to a maximum of S$10,000. Late payment also incurs a 5% penalty.

11. Final takeaway

Singapore GST is 9% on most goods and services. Register with IRAS when your turnover exceeds S$1 million, file your GST F5 return quarterly, and keep valid tax invoices for all input tax claims.

Caption

What you need to know about Singapore sales tax (GST): The rate is 9%. Register when your annual turnover exceeds S$1 million and file quarterly returns with IRAS.

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