A change in the GST rate sounds simple on paper: one number goes up and every invoice follows. In practice, the transactions that straddle the change date cause the most errors, because the correct rate depends on when payment is received and when goods are delivered or services performed, not only on the date printed on the invoice. Staying updated on GST rate changes and transitional rules is therefore a practical compliance task for every GST-registered business in Singapore.
This article explains how rate changes are announced, how the transitional rules worked in 2023 and 2024, and how to prepare for any future change. The current standard rate is 9%, which has applied since 1 January 2024, and Budget 2026 did not announce a further change.
Who this applies to
The transitional rules matter most to businesses that are, or are about to become, GST-registered. That includes:
- Companies registered for GST because their taxable turnover exceeds SGD 1 million, or that registered voluntarily
- Businesses with long-term contracts, subscriptions, retainers, maintenance plans or progress billing that run across a calendar year end
- Businesses that bill in advance or collect deposits before delivery
- Non-GST-registered businesses, which cannot claim input tax and so bear any rate increase as a direct cost
Key rules and requirements in Singapore
How rate changes are announced
GST is imposed under the Goods and Services Tax Act 1993, and changes to the standard rate are usually announced in the annual Budget Statement, which is delivered in February. The most recent increases were announced in Budget 2022 and took effect in two steps: from 7% to 8% on 1 January 2023, and from 8% to 9% on 1 January 2024. IRAS then published an e-Tax Guide on the transitional rules for each change, months ahead of the effective date.
The basic principle behind the transitional rules
For transactions that span a rate change, the rate is generally determined by the date payment is received and the date goods are delivered or services are performed, rather than by the invoice date alone. The rules that applied in both 2023 and 2024 worked broadly as follows:
- Full payment received before the change: the old rate applies, even if the invoice is issued or the goods or services are provided after the change date.
- Goods delivered or services performed before the change, but invoiced and paid after: the business may issue its invoice at the new rate, or elect to charge the old rate on the value supplied before the change. This election was not available for business assets sold in satisfaction of a debt.
- Invoice issued before the change, but payment and supply after: the new rate applies to the lower of the payment received after the change and the value of goods or services supplied after the change. The business adjusts by issuing a credit note and a new tax invoice.
IRAS set deadlines for these adjustments. For the 2024 change, businesses had until 31 March 2024 to issue the credit notes and new tax invoices. Where a business issued an invoice at the new rate and later elected the old rate, a credit note and revised invoice generally had to be issued within 90 days of the original invoice.
Other points to note
- Prices displayed or quoted to non-GST-registered customers must be GST-inclusive, so price lists, websites and menus need updating when the rate changes.
- Zero-rated supplies (such as qualifying exports) and exempt supplies (such as most financial services and the sale or lease of residential property) are not affected by a change in the standard rate.
Step-by-step process
There is no form to file when the rate changes. Preparation is about systems, contracts and people:
- Step 1: Monitor the announcements. Read the Budget Statement each February and check the GST section of the IRAS website for new e-Tax Guides. Subscribing to IRAS updates and checking myTax Mail in the IRAS myTax Portal helps you catch notices early.
- Step 2: Identify straddling transactions. List contracts, subscriptions, deposits and open invoices that will span the change date.
- Step 3: Review contract terms. Check whether prices are stated as GST-inclusive or GST-exclusive, and whether the contract says who bears a rate increase. Where the contract is silent, the GST Act generally allows the supplier to pass the additional GST on to the customer, but it is better not to rely on that without checking.
- Step 4: Update systems. Configure the new tax code in your accounting and point-of-sale systems, and make sure users know when to use the old code and when to use the new one.
- Step 5: Issue adjustments on time. Track credit notes and replacement invoices against the IRAS deadline.
- Step 6: Reconcile the first GST return after the change. Check that output tax and input tax at both rates are reported correctly in the GST F5 return before it is filed.
Common mistakes to avoid
- Charging GST based purely on the invoice date and ignoring when payment was received or the supply was made
- Forgetting to adjust advance invoices that were issued at the old rate but paid after the change
- Claiming input tax at the wrong rate because a supplier’s invoice was not checked
- Leaving outdated GST-inclusive prices on websites, quotations and menus
- Missing the deadline for credit notes and new tax invoices
Errors discovered later can usually be corrected through a voluntary disclosure to IRAS, but prevention is far cheaper than cleaning up several quarters of misreported GST.
Practical examples
Annual maintenance contract paid in advance
A Singapore IT services company invoiced a client in December 2023 for a 12-month support plan starting in January 2024, and the client paid in full before 31 December 2023. Because full payment was received before the change, 8% applied to the whole contract and no adjustment was needed.
Project completed before year end, billed after
An interior design firm finished a fit-out in November 2023 but invoiced in January 2024, with payment received in February. The firm could charge 9%, or elect to charge 8% because the work was fully performed before the change. It chose 8%, which suited its client, a non-GST-registered clinic that could not claim the GST back.
Deposit and balance across the change
A furniture supplier invoiced a GST-registered customer in December 2023 at 8% and received 50% as a deposit in December. The goods were delivered, and the balance was paid, in January 2024. The balance paid after the change, and the goods delivered after it, attracted 9%, so the supplier issued a credit note and a new tax invoice for that portion before the IRAS deadline.
How a corporate secretary can help
A corporate secretary and accounting team help keep GST changes from catching a business off guard. At Raffles Corporate Services, we track Budget announcements and IRAS guidance, flag contracts and invoices likely to be affected, and help clients set up the right tax codes in their accounting systems. We also prepare GST F5 returns and assist with voluntary disclosures where past errors are found. For companies approaching the SGD 1 million threshold, we can advise on GST registration timing alongside your wider accounting, tax and payroll obligations.
Frequently Asked Questions
What is the current GST rate in Singapore?
The standard GST rate is 9%, which has applied since 1 January 2024. Budget 2026 did not announce any further change.
Where can I find official information about future GST rate changes?
The Ministry of Finance’s Budget Statement and the GST pages on the IRAS website are the primary sources.
Does the invoice date decide which GST rate applies?
Not on its own. For transactions spanning a rate change, the payment date and the date goods are delivered or services are performed are also relevant, and the transitional rules explain which combination leads to which rate.
We are not GST-registered. Do we need to do anything?
You do not charge GST, but a rate increase raises your costs because you cannot claim input tax. It is worth reviewing pricing and, if your turnover is growing, whether GST registration makes sense.
Requirements may change, so always check the latest guidance from ACRA, IRAS or MOM, or consult a professional adviser.
Key takeaways
- The standard GST rate in Singapore is 9%, in force since 1 January 2024.
- Rate changes are usually announced in the Budget, with IRAS e-Tax Guides following well before the effective date.
- For straddling transactions, payment and supply dates matter as much as the invoice date.
- Adjustments such as credit notes and new tax invoices must be issued by the deadlines IRAS sets.
- Contracts, pricing, systems and staff training all need attention before a change takes effect.
If you would like to find out more about how Raffles Corporate Services can assist with your company’s compliance and corporate secretarial requirements, please get in touch with the team at [email protected].
Yours sincerely,
The editorial team at Raffles Corporate Services
Disclaimer: This does not constitute legal advice. If you require legal advice, please contact a lawyer.