Scope, basic tax point and the general rule
The sixth edition dated 18 August 2026 explains when supplies are reported and output tax becomes due. Usually use the earlier of invoice issuance and receipt of consideration, not delivery/performance. Consideration may be money or commercially valuable benefits in kind. The Basic Tax Point is goods delivery or making goods available if delivery is impossible, and performance of services. Special statutory rules override the general rule. OVR remote services and low-value goods follow invoice/payment too; reverse charge has a recipient-side rule discussed separately.
What counts as an invoice and payment
A bill requesting payment, including a debit note, triggers timing even if not a tax invoice. Sales orders, pro-formas, statements of account and claim letters normally do not. Cash counts when received; AXS/SAM/NETS/card arrangements when the establishment transfers funds to the supplier; telegraphic transfer when the supplier’s bank receives funds; cheques when banked, or replacement cheque bank-in after dishonour. Stakeholder funds count only on release, although an earlier invoice can still trigger tax. Issue a tax invoice to a registered customer within 30 days of the tax point even where a payment triggered it.
Supplier-financier instalments: full value on the first instalment
Where the seller also provides financing, output tax on the full goods/services value arises at the earlier first-instalment invoice or first payment, not each repayment. Example 1: S$3,000 machinery delivered 1 February, first S$267.50 instalment invoice 15 February and payment 1 March; all S$3,000 is taxed on 15 February. The stated instalment amount is a source example, not a formula for today’s tax rate.
Separate seller and finance-company supplies: Example 2
The car costs S$240,000 GST-inclusive. Seller A invoices/receives S$120,000 on 1 February and invoices financier C for the remaining S$120,000 on 7 February; A accounts on those two dates. C finances S$120,000 over 60 months, principal S$2,000 plus monthly interest S$350 (3.5% for five years). C’s car supply of S$120,000 triggers in full with first payment 1 March, while exempt credit interest triggers periodically by its invoice/payment. Delivery 3 February does not replace either seller’s applicable rule.
Crossing registration and relief: Example 3
A service performed before registration but billed/paid after registration is normally taxable then. A customer unable to recover all or part of input tax may request Basic Tax Point relief if performance/delivery preceded when the supplier was registered or required to register. Supplier and customer sign the IRAS relief form, check all declarations and supplier checks; non-registered, partially exempt and blocked-input customers can qualify. Example 3: performance 1 February, registration 1 March, invoice/payment 1 June. June is taxable unless eligible customer requests relief; the supplier then cannot claim input incurred for that relieved supply.
Crossing deregistration: Example 4 and a source date inconsistency
If goods/services were delivered/performed before deregistration, any value not already covered by invoice/payment is taxed the day immediately before deregistration. Example 4 has S$10,000 delivered 1 February, S$3,000 paid 1 March, deregistration 1 June and S$7,000 paid 15 June; the remaining S$7,000 belongs in the pre-deregistration final period. The source narrative prints 30 May for the preceding day although its timeline says 1 June: the rule makes the immediately preceding calendar day 31 May. This discrepancy is disclosed rather than silently repeated.
Land and immovable property: Example 5
Property sales use the earliest payment, invoice, legal title transfer or availability for occupation. Completed-property booking/deposit receipts trigger their own amounts; transfer/occupation brings the entire remainder into tax even if financed. Developing property uses progressive invoice/payment until availability/transfer taxes the balance. Example 5: S$1 million commercial shophouse, S$50,000 booking 1 February, S$150,000 deposit 1 March and S$800,000 balance financed at S$50,000 monthly. Availability 1 June taxes the full S$800,000 then. Fixtures form part of immovable property; a Temporary Occupation Permit often precedes availability but is not substituted automatically for the actual event.
Section 33(2) agents and deemed private use: Example 6
An agent importing for an overseas unregistered person, including an OVR pay-only person, uses earliest payment, invoice or goods made available/removed. Free transfer/disposal of business goods is timed on transfer/disposal under the deemed-supply rules. Temporary private/non-business use without payment is a deemed service timed at the last day of its accounting period. Example 6: private use 1 February 2023 in a January–March quarter gives 31 March 2023. Do not confuse temporary use’s period-end event with permanent disposal’s event date.
Connected persons and approved Basic Tax Point option: Example 7
Related-person supplies use earliest invoice,payment or 12 months after Basic Tax Point, except the continuous categories in Appendix 2. Example 7: parent-company goods delivered 1 February 2022 without invoice/payment trigger 1 February 2023. A business may separately seek IRAS approval to use earliest Basic Tax Point,payment or invoice generally; apply it consistently and seek approval with reasons before reverting. An optional choice does not defeat prescribed special rules or the distinct registration/input-claim timing rules.
Registration turnover and input acquisitions: Examples 8–9
For assessing registration liability, all transactions use invoice/payment earliest, irrespective of their supplier-side special rules. Example 8 has two S$600,000 service contracts; one billed/paid in 20 X 1 and the other in 20 X 2, so the simplified 20 X 1 test is S$600,000, not S$1.2 million. Full prospective/retrospective registration rules still require the registration guide. Newly registered buyers likewise use supplier invoice/payment earliest for deciding whether acquired supplies are pre-registration, not delivery. Example 9: shophouse available 1 February, buyer registered 1 March, invoice/payment 15 March; for the buyer’s input test it is post-registration subject to normal claims, even if the seller’s output point was earlier.
Approval and sale-or-return goods: Example 10
Timing is earliest invoice, payment settling an accepted sale, or 12 months after goods leave the consignor. A refundable security deposit pending acceptance does not count until applied to an existing sale debt. Once invoice/payment triggers, tax the full selling price. Example 10: S$1,000 goods sent 1 January with refundable S$500 deposit; buyer accepts 15 March and deposit becomes part-payment. The full S$1,000 triggers 15 March, not just S$500. The contract also treats non-rejection within three months as acceptance, but that is the example’s contract term rather than a universal three-month GST rule.
Rental advance invoices up to three years: Example 11
General invoice/payment timing applies unless a tax invoice covers an advance period no longer than three years and specifies every due date,ex-GST amount,tax rate and GST in addition to normal particulars. Then use each due date/payment earliest. Missing details restores general timing. Example 11: office lease 1 June 2023–31 May 2025,advance invoice 1 May 2023 with S$2,000 monthly due each first; first paid 1 July. First tax point is 1 June 2023 due date, not the May advance invoice or July late payment. The 2026 edition cites renumbered Regulation 16(1).
Continuous services advance invoices up to twelve months: Example 12
Continuous periodic services use invoice/payment unless a complete advance tax invoice covers no more than 12 months with each due date,ex-GST amount and tax rate/GST. Then each payment or due date triggers. Example 12: two-year cleaning contract starting 1 June 2023; invoice 1 May covers only first 12 months to 31 May 2024 with S$2,000 due each 15 th. Advance first payment 30 May precedes 15 June,so tax point 30 May. A two-year contract does not invalidate a qualifying invoice restricted to 12 months. The amended citation is Regulation 20(1).
Other schemes and reverse charge: Example 13
Approved Third Party Logistics,ACMT,customer/recipient accounting,cash accounting,gold jewellery,coin-operated machines and rate-change rules require their dedicated guides. For reverse charge on imported services from 2020 and LVG from 2023,use earliest supplier invoice or payment made by the recipient. Example 13: services 15 June 2020,invoice 15 July,payment 1 October; report July–September quarter,not performance quarter. Eligible businesses may elect longer-period treatment at the day immediately after the longer period ends; fixed-input-recovery-rate businesses cannot use that election. Track Basic Tax Point for registration/deregistration boundaries and connected persons,overseas branches/head office or same-group overseas members as the RC guide requires.
Appendix 1: individuals, trustees and partnerships
Connected individual categories are spouse,relative,relative’s spouse,and spouse of a relative of the individual’s spouse. Relative means brother,sister,ancestor or lineal descendant. A trustee connects to the settlor,persons connected to the settlor and a body corporate connected with the settlement. Partners connect to each other and an individual partner’s spouse/relative,except acquisition/disposal of partnership assets under bona fide commercial arrangements. Do not reduce the appendix to company ownership alone.
Appendix 1: corporate connection, control and participators
Companies connect where the same person controls both,one person’s connected circle controls the other,or controlling groups can be matched by substituting connected persons. A company connects to its controller or controller plus connected persons; persons acting together to secure/exercise control and those following their directions connect. Control includes direct/indirect ability or entitlement to acquire control,typically majority capital/votes,income distribution excluding loan-creditor rights for that test,or distributable assets. Include nominee rights/powers. Company includes bodies corporate/unincorporated associations and unit-trust schemes,but excludes partnerships. Participators include holders/entitled acquirers of capital/votes,loan creditors,distribution/redemption-premium rights and persons securing present/future income/assets for their benefit; future acquisition entitlements count.
Appendix 2: all seven exclusions from the connected-person 12-month rule
The exceptions cover periodic licence/tenancy/lease consideration; utilities/power,gas other than cylinders,water,light,heat,refrigeration,air-conditioning,ventilation and telecommunications; goods retained by seller until buyer appropriation fixes consideration; post 1 April 1994 contracts with retention pending satisfactory performance; services for a period priced/payable periodically; royalty-like benefit-use rights valued later by another person; and building/engineering construction,alteration,demolition,repair or maintenance under periodic-payment contracts. These exclude the 12-month rule,not GST altogether or every other timing rule.
Amendments and enquiries
The 2019 revision added reverse-charge/OVR rules and removed pre 2011 timing material;2022 added 2023 LVG/non-digital remote-service extensions;2024 edited four examples;18 August 2026 updated the regulation numbers for qualifying rental/service advance invoices. Consult IRAS GST Contact Us. Preserve historical dates and source calculations rather than assuming every illustration uses the latest rate.
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.
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