The 2024 transition in a January 2026 edition
The linked document is now the fourth edition of IRAS’s 2024 GST rate-change guide, published 30 January 2026, despite its filename referring to a first edition. It explains the rise from 8% to 9% on 1 January 2024 and transactions also spanning the earlier 7%-to 8% change on 1 January 2023. The transitional adjustment dates in this article are historical deadlines for those transactions, not new filing opportunities.
Three dates determine the transition
For most supplies, including OVR imported services, the time of supply is the earlier of invoice or receipt of payment for an identified supply accepted by both parties. The basic tax point is when goods are removed or made available or services performed. Record all three dates to test a straddling transaction. The ordinary rate follows the time of supply, subject to the transition. Do not charge or show 9% on invoices issued or payments received before 1 January 2024.
Public prices and absorbing the increase
Public price displays must include GST, with 9%-inclusive prices from 1 January 2024. During preparation, two clearly dated prices can show before and after amounts. If the business keeps its selling price unchanged, GST is still 9/109 of the inclusive price for applicable new sales. The genuine service-charge exception for hotels and F&B requires a prominent GST-and-service-charge statement; it does not cover businesses with no service charge or a nominal charge introduced solely to avoid inclusive display.
Invoice after the change: full payment cases
An invoice issued from 1 January 2024 with full payment received in 2023 remains at 8%, regardless of later delivery. If both invoice and payment occur from that date,9% ordinarily applies. The supplier may elect 8% for goods delivered or services performed in 2023, leaving the later portion at 9%. If performance is wholly after the change, that election is unavailable. The invoice date alone does not establish that every part must bear 9%.
Invoice after the change: partial payment
Normally apply 8% to payment received in 2023 and 9% to later payment. Where delivery or performance occurred in 2023, the election permits 8% on the higher of 2023 payment and 2023 delivered/performed value. In the 1,000 example with payment 200 and goods 400 before the change, elect 8% on 400 and 9% on 600. If prior payment 600 exceeds prior goods 200,8% already applies to 600 and no additional election is needed.
Who makes the election and what supports it
The local GST-registered supplier makes the election; an approved self-billing customer needs written supplier agreement before invoicing at 8%. No prescribed election form or prior approval is needed, but retain delivery orders, work certification, customer acknowledgement or equivalent commercial evidence. The election cannot be applied to business assets sold in satisfaction of a debt. It is a supported supplier choice, not an unrestricted customer right to demand an old rate.
Correcting a new 9% invoice after an old-rate election
A 9% invoice later elected down to 8% needs a credit for excess GST or cancellation and simultaneous replacement. The basic deadline was 15 January 2024, with the stated automatic allowance up to 90 days from the original invoice where that deadline could not be met; an earlier customer request must be honoured. For a 4 January invoice on 1,000, credit excess tax 10 or cancel 1,090 and replace 1,080; its 90-day date is 3 April 2024.
Invoice in 2023: the lower-of rule
A 2023 invoice stays fully at 8% where either full payment or complete delivery/performance occurred in 2023. Otherwise 9% applies to the lower of post-change payment and post-change delivery/performance value, with the remainder 8%. For a 1,000 invoice, post-change payment 800 and delivery 600 lead to 600 at 9%, not 800 or the entire 1,000. This compulsory adjustment differs from the election for a post-change invoice.
Old invoices, replacement documents and accounting dates
For the affected part of an 8% tax invoice, issue the credit note and replacement 9% invoice, or cancel the whole original and reissue the respective 8% and 9% parts. The guide allowed until 31 March 2024 without application; a later extension required IRAS approval. The normal output-tax trigger is the earliest replacement invoice, relevant payment or 15 January 2024, with the specified allowance linked to the extended document date no later than 31 March. Non-tax invoices can follow normal commercial adjustment practices but still need correct tax and internal evidence.
Continuous and private-use supplies
Licences, leases, utilities, construction and subscriptions follow the same three-date analysis. December utilities invoiced and paid in January can receive the supported 8% election. For business goods put to private or non-business use without consideration after input tax was allowed, the deemed service occurs at the accounting period’s last day. A period ending 31 January 2024 therefore ordinarily gives 9%, but an evidenced election can apply 8% to the actual 2023-use portion.
Registration and deregistration boundaries
A tax point before registration or after deregistration is generally outside GST and the rate transition does not itself bring it in. For performance before registration, a customer unable to recover all relevant input tax can request the permitted basic-tax-point treatment. Before deregistration, performed supplies not covered by invoice or payment are brought to account on the immediately preceding day at its applicable rate. The guide distinguishes deregistration in 2023 from after 1 January 2024; in the latter case the transition and final unaccounted balance must both be considered.
Transactions spanning both changes
Apply the 2023 and 2024 transitions separately. A pre-2023 invoice initially at 7% may need an 8% adjustment on the lower of payment or performance after 1 January 2023, then a 9% adjustment on the lower after 1 January 2024. A 2023 invoice with earlier payments can preserve the relevant 7% portion and then requires the 2024 adjustment. Do not apply 9% indiscriminately to amounts already taxed under an earlier valid payment or performance allocation.
A three-rate service example
For maintenance worth 1,000 performed 200 in 2022,600 in 2023 and 200 in 2024, a post-change balance invoice can result in 200 at 7%,600 at 8% and 200 at 9%, using the elections and already-accounted-payment rules. Amounts of 2023 payments elected to 7% must be removed before testing the 8% election. The guide also illustrates old invoices adjusted twice: an 800 portion moves from 7% to 8% and a later 200 portion moves from 8% to 9%.
The exceptional 7% election in 2024
The ordinary second transition does not provide a 7% election for pre-2023 performance where the tax point occurs in 2024. The guide nevertheless gives a concession with documentary evidence. If performance spans both changes, use any available 2023 election first; the new 7% concession is limited to performance from 1 July 2007 to 31 December 2022 less amounts already at 7%. Correct excess tax or cancel and replace within 90 days of the original invoice, sooner if the customer requests. The same principles apply to reverse charge.
Reverse charge: ordinary and posting-date methods
A business or GST group without full input recovery can owe reverse charge on relevant overseas services. Use invoice or payment-made dates, or the permitted consistently applied earlier posting/payment method. The same higher-of old-performance election and lower-of post-change compulsory adjustment apply. For an old invoice or posting, additional tax is accounted at the earlier relevant payment or 15 January 2024. Keep contracts, completion evidence and internal election records. Recover corresponding input tax only under the actual input-recovery rules; an extra tax 10 with 90% recovery produces input tax 9.
Reverse charge at the end of a longer period
Where the longer-period election applies, the deemed date is the first day after that longer period. If that day falls from 1 January 2024, report in the accounting period containing that day; if it was in 2023, the additional 2024 tax goes into the period containing 15 January 2024. The example with a longer period ending 31 March 2024 reports 300 at 8% and 700 at 9% in the June 2024 quarter. Another earlier longer-period example adds 4.50 on a 450 post-change portion in the period ending February 2024.
Reverse-charge registration and two-year transactions
The registration and cessation boundaries have corresponding reverse-charge rules. Pre-registration performance can use the permitted basic tax point, while pre-deregistration unaccounted services come into charge immediately before cessation. For transactions spanning both rate changes, apply both adjustments under the chosen ordinary, posting or longer-period method. The long maintenance example adds 1% on 800 for the 2023 change and 1% on 200 for 2024, with input recovery determined separately in each period.
OVR digital, non-digital and low-value supplies
B 2C imported digital services entered OVR in 2020; non-digital services and low-value goods entered the extended regime in 2023 with separate implementation transitions. Taxable supplies straddling 2024 use this guide’s rate rules. Under the simplified pay-only regime, no additional tax-invoice or price-display requirements are imposed; an old non-tax invoice need not be credited and replaced solely for the rate adjustment. The additional tax still must be accounted for at the correct time.
Apportionment and fixed-price contracts
Use measurable-work value, normal costing or pricing, or another appropriate proxy. Thirty percent of homogeneous goods can represent 30% of total value; evenly performed 6,000 cleaning from November to January splits 4,000 before the change and 2,000 after it. Existing contracts can generally increase for the new tax unless expressly excluding or already accounting for the change. A contract fixing the inclusive 10,800 instead yields tax 891.74 using 9/109; contract wording determines who bears the increase.
Credit-note content and return treatment
A rate-change credit note needs its heading, identifier, date, supplier details and GST number, customer details, original invoice number and date, goods/service description, reason, quantity, value and tax rate/amount. Retain a copy and supporting explanation. Suppliers reduce standard-rated supplies and output tax; customers reduce purchases and input tax. Generally use the period of issue, subject to the transition timing rules. In the 800 adjusted portion example, reducing tax 64 and replacing it with 72 gives net output-tax increase 8.
Cash rebates versus future-sale discounts
A cash volume rebate adjusts past purchases using their original 7%,8% or 9% rate, with reasonable apportionment for mixed periods and tax fractions for inclusive rebates. A rebate usable only against a later sale instead reduces that later sale’s value, which bears 9% when applicable after the change. The form and linkage of the rebate determine the treatment, not merely the date it is announced.
Returns, exchanges and store credit
Returned old goods are credited at their original rate with evidence of the original supply. If the invoice cannot be traced, the no-GST-adjustment concession requires written agreement, a fully taxable customer and the required statement that the credit note is not for GST purposes. An exchange without refund preserves the old payment, charging 9% only on extra consideration. A cash or store-credit refund reused for another purchase instead makes the full new purchase taxable at 9%. In the 1,000-to 1,500 example these are 500 versus 1,500 new-rate bases.
Simplified invoices and input tax
Simplified invoices are permitted where total inclusive consideration is no more than 1,000. A new-dated simplified invoice applying 8% must separately show rate or amount; otherwise issue a proper tax invoice. Mixed-rate supplies need clear respective parts on a proper invoice or separate permitted simplified invoices. Input tax is limited to the amount shown or the appropriate fraction when allowed; ordinary 2023 and 2024 simplified-invoice fractions are 8/108 and 9/109. No separate transition return is required.
Recurring and electronic payment concessions
January 2024 recurring GIRO or credit-card receipts can be treated as pre-change only if effected successfully by month-end, relate to pre-change invoices and follow the normal billing cycle. Non-recurring card charges, recipient-bank TT instructions, AXS/SAM/NETS transactions and e-wallet deductions by 31 December 2023 have the stated treatment. FAST and PayNow use actual instantaneous receipt. Ad-hoc GIRO needs evidence of pre-change customer deduction and receipt by 5 January 2024. A platform merchant needs documents supporting the customer-payment concession despite later remittance.
Cheques, midnight trading and the preparation checklist
A 2023-issued cheque successfully cleared after bank-in by 4 January 2024 can count as pre-change payment. A business normally attributing post-midnight sales to the prior day through its cash-register and accounting system can use 8% until 7 am on 1 January 2024. The annexes turn the invoice/payment/performance rules into checklists and flowcharts and exclude posting-date RC from the ordinary checklist. Preparation includes systems and receipt updates, inclusive prices, staff training, contract review, customer communication and consideration of the Major Exporter Scheme where relevant.
Official source
This article independently explains the substantive contents of the official PDF, including the relevant conditions, procedures and annexes. The linked document remains the authoritative source for its original wording, and later changes should be checked separately.
Read the official PDF ↗