Singapore GST Guide for Small Businesses 2026: Registration, Filing, and Compliance
Singapore raised GST to 9% in 2024. This guide covers everything SMEs need to know about GST registration, filing quarterly returns, and staying compliant with IRAS requirements.
Singapore GST in 2026: What Every SME Must Know
Singapore's Goods and Services Tax (GST) is a broad-based consumption tax applied to most goods and services in Singapore. In January 2024, the GST rate increased from 8% to 9% — the final step in the two-phase increase announced in Budget 2022.
For Singapore SMEs, the GST rate change affects pricing, compliance, and cash flow management. This guide covers the complete GST framework for Singapore businesses in 2026 — registration thresholds, filing requirements, input tax claims, and the most common compliance mistakes.
---
GST Registration: When It Is Mandatory and When It Is Optional
Mandatory Registration
You must register for GST if your taxable turnover exceeds S$1 million in the past 12 months, or you have reasonable grounds to expect it to exceed S$1 million in the next 12 months.
Taxable turnover includes:
- Standard-rated supplies (9% GST)
- Zero-rated supplies (0% GST — exports, international services)
Monitoring your threshold: IRAS (Inland Revenue Authority of Singapore) looks at the trailing 12-month period. If your taxable turnover crosses S$1 million at any point, you must register within 30 days. Operating without registration after crossing the threshold attracts fines of up to S$10,000.
Voluntary Registration
Businesses below S$1 million can register voluntarily. The main advantage: you can claim input tax on your business expenses — the 9% GST you pay on your business purchases, services, and imports becomes recoverable.
When voluntary registration makes sense:
- Your business has significant input costs (equipment, professional services, software) with 9% GST
- Your customers are mainly GST-registered businesses that can reclaim input tax anyway (being registered signals compliance maturity)
- You are approaching the S$1 million threshold and want to register proactively
- You must make taxable supplies (cannot register if you only make exempt supplies)
- Once registered, you must stay registered for at least 2 years
- IRAS may require a banker's guarantee for voluntary registrations
What Is Taxable, Zero-Rated, and Exempt
Standard-Rated (9%)
The default rate. Applies to most goods and services in Singapore:
- Retail goods
- Restaurant and food services (dine-in and takeaway)
- Professional services
- IT and software services
- Construction services
- Rental of commercial property
Zero-Rated (0%)
Zero-rated supplies attract 0% GST, but the business can still claim input tax on related costs.
Key zero-rated categories:
- Export of goods physically shipped outside Singapore
- International services (services provided to overseas customers benefiting outside Singapore)
- Sale and lease of precious metals (gold, silver, platinum)
Exempt (No GST)
Exempt supplies are not subject to GST and the business cannot claim input tax on costs directly related to making exempt supplies.
- Sale and rental of residential property
- Financial services (most banking, insurance, securities activities)
- Import of investment precious metals
How to Register for GST in Singapore
All GST registration in Singapore is done through the myTax Portal at mytax.iras.gov.sg using your Singpass login.
Step-by-Step Registration
---
GST-Compliant Invoices: Tax Invoice Requirements
Once registered, you must issue a tax invoice for every standard-rated supply exceeding S$1,000. For supplies below S$1,000, a simplified tax invoice is acceptable.
Full Tax Invoice Requirements (for supplies > S$1,000)
- The words "Tax Invoice" must appear clearly
- Your name, address, and GST registration number
- Invoice date and unique serial number
- Customer's name and address
- Description of goods or services
- Quantity and unit price
- Any discount
- Total before GST, GST amount, and total including GST
- For each item: whether it is standard-rated, zero-rated, or exempt
Simplified Tax Invoice (for supplies ≤ S$1,000)
- Supplier's name and GST registration number
- Invoice date
- Description of supply
- Total amount payable including GST
- Statement that GST is included (e.g., "GST included at 9%")
---
Filing GST Returns: F5 and F8
F5 Return (Standard Quarterly Return)
Most GST-registered businesses file quarterly (every 3 months). The return is called F5.
F5 requires:
- Box 1: Total value of standard-rated supplies
- Box 2: Total value of zero-rated supplies
- Box 3: Total value of exempt supplies
- Box 4: Total value of out-of-scope supplies
- Box 5: Total value of taxable purchases (standard + zero-rated)
- Box 6: Output tax (GST you collected — 9% × standard-rated supplies)
- Box 7: Input tax (GST you paid on purchases)
- Box 8: Input tax adjustment (capped residual input tax method if applicable)
- Box 9: Net GST payable or refundable
Common quarters:
- Jan–Mar → Due 30 April
- Apr–Jun → Due 31 July
- Jul–Sep → Due 31 October
- Oct–Dec → Due 31 January
F8 Return (Final Return on Deregistration)
When you deregister from GST, an F8 return covers the final accounting period.
---
Input Tax Claims: What You Can and Cannot Claim
Input tax (GST paid on your purchases) is recoverable against your output tax (GST you collect). This is the fundamental mechanism of GST — the net tax flows to the government, not accumulated through the chain.
Claimable Input Tax
- Purchases for making taxable supplies (both standard and zero-rated)
- Business expenses with proper tax invoices
- Import GST paid to Singapore Customs
Non-Claimable Input Tax
- Expenses for making exempt supplies
- Private/personal expenses
- Motor car expenses (unless you run a car rental, driving instruction, or similar car-related business)
- Club memberships and subscriptions
- Entertainment expenses for non-customers
---
Reverse Charge and Overseas Vendor Registration
Reverse Charge (RC)
From 1 January 2020, Singapore GST-registered businesses that receive imported services from overseas suppliers must account for GST on those services under the reverse charge mechanism.
What is affected:
- B2B imported services (consulting, IT services, legal, accounting from overseas firms)
- Services that would be taxable if supplied locally
Net effect: zero additional cost for fully-taxable businesses. But the F5 return figures are higher and more complex.
Overseas Vendor Registration (OVR)
Foreign businesses selling digital services to Singapore consumers (B2C) must register under the Overseas Vendor Registration framework if their sales to Singapore customers exceed S$100,000/year AND their global turnover exceeds S$1 million/year.
Affected foreign vendors: streaming platforms, app stores, digital content providers, software-as-a-service.
If you are a Singapore business buying from foreign software vendors, they should already be charging you 9% Singapore GST. If not, the reverse charge applies.
---
GST for Singapore E-Commerce Businesses
Selling to Singapore Customers
Standard Singapore GST rules apply. All local sales are standard-rated at 9%.
Exporting Goods to Overseas Customers
Physical exports are zero-rated. Maintain export documentation (commercial invoice, airway bill/bill of lading, packing list) as evidence for zero-rating.
Low-Value Goods (LVG) imported into Singapore: From 1 January 2023, all goods imported into Singapore — regardless of value — are subject to 9% GST. The previous S$400 import relief threshold was removed. This affects you if you sell physical goods shipped into Singapore for your customers.
Shopify Stores in Singapore
Configure your Singapore Shopify store:
- Add your GST registration number to your Shopify legal information
- Configure 9% GST on all standard-rated products
- Set up zero-rating for export orders with proof of export documentation
- Ensure your invoice template includes all IRAS-required tax invoice fields
- Razorpay is not available in Singapore — use Stripe, PayPal, or Singapore-specific payment processors
Common GST Mistakes by Singapore SMEs
Mistake 1: Not issuing tax invoices. Many small businesses issue receipts or delivery orders but not proper tax invoices. B2B customers need tax invoices to claim input tax. Failing to issue proper tax invoices creates problems for your customers and compliance risk for you.
Mistake 2: Claiming input tax without tax invoices. IRAS requires a valid tax invoice (with supplier's GST number) to support every input tax claim. Claims without proper supporting invoices can be disallowed during audit.
Mistake 3: Missing the threshold and not registering. S$1 million is crossed by businesses that do not monitor their rolling 12-month turnover. IRAS has access to bank and financial records — unreported taxable supplies that crossed the threshold can be assessed retrospectively.
Mistake 4: Wrong treatment of entertainment expenses. Entertainment is non-claimable as input tax in Singapore. Many businesses incorrectly claim input tax on business meals, client entertainment, and staff parties. IRAS frequently flags these during audits.
Mistake 5: Not keeping records for 5 years. All GST records — invoices, receipts, import documents, returns — must be kept for 5 years from the end of the accounting period they relate to.
---
How Taskmate ERP Handles Singapore GST
For Singapore-based businesses or businesses operating across Malaysia and Singapore, [Taskmate ERP](/taskmate) handles multi-jurisdiction tax configuration — Singapore's 9% GST alongside Malaysia's 6% Service Tax — within a single integrated system.
Multi-currency operations (SGD and MYR) with exchange gain/loss accounting are handled natively, which is important for businesses with cross-border flows between the two markets.
[AHAD Global Ventures](/services) works with Singapore and Malaysia SMEs on accounting system setup, ERP implementation, and cross-border financial operations. Contact us to discuss your requirements.
---
Frequently Asked Questions
What is Singapore's GST rate in 2026? Singapore's GST rate is 9%, effective from 1 January 2024. This was the second and final phase of the increase announced in Budget 2022 (it went from 7% to 8% in January 2023, then to 9% in January 2024). There are no current announcements of further rate changes.
Must all businesses in Singapore charge GST? No — only GST-registered businesses. Registration is mandatory only when your taxable turnover exceeds S$1 million in any 12-month period. Below this threshold, registration is voluntary. Small businesses below S$1 million can choose not to register and not charge GST.
How do I know if a supplier in Singapore is GST-registered? All Singapore businesses are required to display their GST registration number on tax invoices if they are registered. You can also verify a GST registration number directly on IRAS's website (search for "GST Registration Number Checker" at iras.gov.sg).
Can I claim GST back on capital equipment purchases? Yes, GST paid on capital equipment (computers, machinery, vehicles — with exceptions) used for making taxable supplies is claimable as input tax in your GST return. This is one of the key benefits of GST registration for businesses with significant equipment investment.
What happens if I file my GST return late? A late filing fee of S$200 applies for the first late return. IRAS may also issue a Notice of Assessment estimating your GST liability if returns are repeatedly late. Continued non-compliance can result in IRAS taking enforcement action including prosecution.
---
Read more about [best accounting software Singapore SME 2026](/blog/best-accounting-software-singapore-sme-2026), [how to start a business in Singapore 2026](/blog/how-to-start-business-in-singapore-2026), or [Malaysia SST vs Singapore GST comparison](/blog/malaysia-sst-vs-singapore-gst-comparison).