An invoice arrives from an overseas software provider or foreign consultant. There is no GST line. For most Singapore businesses, this is simply how cross-border billing works — and no further action is required. For a specific category of GST-registered business, however, the absence of GST on that invoice does not mean GST is absent from the transaction. It means the obligation to account for GST has shifted to the buyer.
This mechanism is Singapore's Reverse Charge regime. Introduced on 1 January 2020 for imported services and extended on 1 January 2023 to imported low-value goods, it requires qualifying businesses — known as RC Businesses — to self-account for GST on overseas purchases as if they were the supplier. Understanding how to calculate GST and service charge under Reverse Charge, and whether your business falls within scope, is a material compliance question for any Singapore company with significant overseas procurement.
The framework is documented in the IRAS Reverse Charge e-Tax Guide (Tenth Edition, January 2026), which is the governing reference for both imported services and imported low-value goods. This article distils the key rules, the two-condition test that determines scope, and the reporting mechanics founders and finance teams need to apply in practice.
Key Takeaways
Under the Reverse Charge mechanism, when an overseas supplier makes a B2B supply of services to a GST-registered Singapore business, the Singapore recipient — not the foreign supplier — accounts for GST on the value of the imported services as if it were the supplier. The foreign vendor charges nothing; the buyer self-declares the GST in its own GST return.
The regime was introduced to level the playing field between local and overseas service providers. Prior to 1 January 2020, a Singapore business procuring services from a local GST-registered firm paid GST on the fee. The same business procuring identical services from an overseas firm paid no GST, creating a structural pricing advantage for foreign suppliers. Reverse Charge eliminates that asymmetry by treating imported services as taxable regardless of where the supplier is based.
Reverse Charge on imported services took effect from 1 January 2020. With effect from 1 January 2023, the regime was extended to imported low-value goods (LVG) — goods with a customs value of S$400 or below that are not already subject to GST at the point of importation. The IRAS Reverse Charge e-Tax Guide (Tenth Edition, January 2026) is the governing reference for both categories.
Reverse Charge is distinct from the Overseas Vendor Registration (OVR) regime. Under OVR, overseas vendors supplying remote services or low-value goods to non-GST-registered Singapore consumers register with IRAS and charge GST directly on B2C transactions. Reverse Charge addresses the B2B side — where the overseas supplier does not charge GST and the Singapore buyer self-accounts instead. On any individual transaction, the two regimes are mutually exclusive.
Where an OVR-registered supplier invoices a GST-registered Singapore business, the supplier should not charge GST — the buyer provides its GST registration number, triggering the supplier's B2B treatment. If the buyer is an RC Business, Reverse Charge then applies on the buyer's side.
A GST-registered Singapore business is an RC Business — and therefore subject to Reverse Charge — when it is not entitled to full input tax credit. This condition is distinct from the S$1 million threshold that applies to non-GST-registered businesses. For already-registered businesses, scope is determined solely by input tax entitlement.
Not Entitled to Full Input Tax Credit — What This Means
Under the IRAS Reverse Charge e-Tax Guide, a GST-registered business is not entitled to full input tax credit in two circumstances:
Businesses that make exempt supplies — financial services, residential property leasing, sale of investment precious metals — will typically fail the De Minimis Rule once those exempt supplies reach a material scale. Common RC Business profiles include developers of mixed-use properties, banks and financial institutions, investment-holding companies receiving dividend income, and businesses making inter-company loans that generate interest income classified as exempt.
A business that makes only standard-rated and zero-rated supplies is entitled to full input tax credit. It does not fail the De Minimis Rule because it makes no exempt supplies. Accordingly, it is not an RC Business and Reverse Charge does not apply to its overseas procurement — regardless of how much it spends on imported services.
Practitioner's Note: The RC Business determination is not always straightforward. A technology company that is predominantly taxable but has a subsidiary or branch making residential property rental income may find its GST group pulled into RC scope. Where a GST group includes any member not entitled to full input tax credit, Reverse Charge applies to every member of that group. Businesses that have undergone restructuring or added revenue streams should reassess their RC status at each prescribed accounting period.
Imported services subject to Reverse Charge are services procured from suppliers belonging outside Singapore that are used, or intended to be used, in making supplies in Singapore. The scope is broad and includes most cross-border service procurement a Singapore business undertakes — from software subscriptions to foreign professional advisory to intra-group fees.
The following are among the most frequently encountered imported services for Singapore SMEs and subsidiaries of foreign groups:
For a full schedule of services that fall within and outside Reverse Charge scope, Annex B of the IRAS Reverse Charge e-Tax Guide provides a comprehensive reference.
Management fees, shared service charges, and similar payments from a Singapore subsidiary to its overseas parent or head office are imported services subject to Reverse Charge. This applies whether or not the arrangement is formally invoiced, and inter-branch transactions between a Singapore branch and its offshore head office are treated in the same way. The GST obligation is assessed on the value of the services. As noted in the IRAS guidance on Reverse Charge, transfer pricing adjustments can affect the value used for GST purposes.
From 1 January 2023, Reverse Charge was extended to cover imported low-value goods — goods with a customs value at or below S$400 that are not dutiable. Where an RC Business purchases such goods from an overseas supplier and the goods have not already been subject to GST at Singapore Customs importation, Reverse Charge applies.
An RC Business calculates GST at 9% on the value of the imported service and records it as output tax in the GST F5 return. The same GST amount is then claimed as input tax to the extent the imported service is used for taxable supplies. For a fully taxable business, the net GST cost is nil. For a partially exempt business, only the taxable-use fraction is recoverable — the remainder is an actual cost.
Co. A is a partially exempt Singapore business that makes both taxable supplies and exempt supplies. It engages an overseas advertising firm for media planning services at S$5,000. The overseas firm does not charge GST. Co. A's input tax recovery rate is 70%.
If Co. A were a fully taxable business with 100% input tax recovery, the net cost would be S$0 — the output tax and input tax entries cancel out. The real cost of Reverse Charge falls exclusively on partially exempt businesses, which was the intended policy design: parity with local suppliers who also cannot recover input tax in full on costs incurred for exempt supplies.
The GST Reverse Charge regime targets a specific category of business — those not entitled to full input tax credit — and imposes a self-accounting obligation on their overseas service procurement. For most fully taxable Singapore SMEs, the regime does not apply and overseas invoices with no GST line require no GST action. For partially exempt businesses, holding companies, and Singapore subsidiaries of foreign groups with intra-group fee arrangements, the analysis is more nuanced and the cost of non-compliance is real.
Accurate assessment of RC Business status, a maintained register of imported services, and correct Box 5, Box 6, Box 7, and Box 14 reporting in each GST F5 return are the operational requirements. Together with the rules on zero-rated supplies and GST on gifts and samples, Reverse Charge forms part of the set of GST obligations most commonly mishandled by Singapore businesses with cross-border activity.
GST Reverse Charge compliance requires an accurate determination of input tax entitlement, a structured approach to tracking imported services across cost centres, and correct integration of RC entries into quarterly GST F5 filings. The rules are precise, and the exposure falls disproportionately on businesses whose supply mix has changed — through restructuring, new revenue streams, or group registration changes — without a corresponding update to their GST compliance processes.
For GST-registered companies seeking to clarify their RC Business status or establish a reliable process for imported services reporting, ATHR provides accounting and tax services, corporate secretary services, and company incorporation support — covering compliance from entity setup through to ongoing GST reporting.
👉 Ready to establish a clear GST compliance process for your Singapore operations? Book a free consultation with ATHR today →
The ATHR Content Team is a group of professional writers from Singapore and the Philippines, committed to delivering informative, practical, and engaging content for business owners across Southeast Asia.
