IRAS GST ACAP Renewal Seventh Edition 2026: What It Means for Your Compliance Calendar

On 1 September 2026, the Inland Revenue Authority of Singapore (IRAS) published the seventh edition of its e-Tax Guide, GST: Renewal of Assisted Compliance Assurance Programme (ACAP) Status. For most company directors, the words “e-Tax Guide” trigger an instinctive hand-off to the tax agent or auditor. That instinct is only half right for this particular update.

The seventh edition rewrites Appendix 1 of the guide, the “GST ACAP Renewal Review Guidance” that every ACAP Reviewer works from, and it touches three areas that a company secretary or in-house finance lead should care about directly: how partial exemption rules are reviewed, what has to go into the ACAP Renewal Report, and how a business now asks IRAS for a technical clarification when it disagrees with a Reviewer’s finding. None of these are pure tax-technical questions. They are, at heart, questions about what documents your compliance calendar needs to produce, and when.

This article looks at the seventh edition from that angle: what changed, why it matters operationally, and what a Singapore SME’s corporate secretarial and finance function should be doing about it before the next ACAP renewal review date arrives.

What ACAP Is, for Readers Coming to This Fresh

The Assisted Compliance Assurance Programme is IRAS’s voluntary compliance assurance scheme for GST-registered businesses. A company that wants ACAP status engages an independent, IRAS-screened ACAP Reviewer to conduct a rigorous, audit-style review of its GST controls at three levels: the Entity level (governance and policies), the Transaction level (how individual invoices and supplies are classified and recorded), and the GST Reporting level (how the GST return itself is compiled and submitted).

If the review confirms the controls are sound, IRAS awards either ACAP Premium status (valid for five years) or ACAP Merit status (valid for three years).

Why bother with ACAP in the first place

Approved ACAP businesses are not just given a certificate to frame in reception. The programme comes with tangible operational benefits: a step-down in the intensity of IRAS’s routine GST compliance activities, faster GST refunds, quicker turnaround on ruling requests, and, where applicable, auto-renewal of related GST schemes. For a growing SME that files GST quarterly and is tired of ad hoc queries from IRAS, ACAP status is one of the few ways to convert a strong internal control framework into a measurable reduction in compliance friction.

ACAP status is not permanent. It must be renewed, and the renewal review, while lighter-touch than the first-time ACAP review, is still a formal, evidence-based process that a business needs to plan for well ahead of the expiry date. This is where the seventh edition guide comes in.

What the Seventh Edition Actually Changes

IRAS’s own changelog to the guide lists three substantive amendments to Appendix 1, plus general editorial tidying. Each one has a direct operational consequence.

1. Partial exemption now has to be reviewed at the walk-through stage

Paragraph 3.9 of Appendix 1 has been amended to make clear that when the ACAP Reviewer performs its walk-through of GST reporting controls, it must specifically verify whether the business has correctly applied the partial exemption rules to its recovery of input tax, and whether any required longer-period adjustments have been performed.

This matters beyond the obvious cases. Partial exemption is not only a concern for banks and insurers. Any company that earns exempt income alongside its taxable supplies, most commonly through interest income on intercompany loans, dividend income routed through a holding structure, or the sale of a residential property, is a partially exempt business for GST purposes and cannot claim all of its input tax. If your company has never formally tested whether it falls into this category, the ACAP renewal review is no longer the place to find that out for the first time. It should be checked, and documented, before the Reviewer arrives.

2. The ACAP Renewal Report needs more information up front

Section 1 of the ACAP Renewal Report (Business Information) has a new paragraph 7.3(c). Previously the report asked for the accounting software used, the income streams and their GST classification, checks on the Major Exporter Scheme, and changes since the last Post ACAP Review. The new requirement adds an explicit statement on whether the business has complied with input tax attribution and apportionment rules, and whether longer-period adjustments have been performed where applicable, mirroring the same partial exemption theme running through the walk-through change above.

In practical terms, this is one more line item your finance team, or your outsourced accounting provider, needs to be able to answer with confidence and evidence, not just a verbal assurance, when the Renewal Report is compiled.

3. A clearer procedure for technical clarification requests

New paragraphs 8.7 to 8.10 set out, for the first time in this guide, exactly how a business should handle disagreements with an ACAP Reviewer’s findings. Where a technical clarification is sought alongside the ACAP Renewal Report, the Reviewer must now provide a tabulated summary of the request under “Section 3: Technical clarification / Areas for concurrence” in the Follow-Up Action on GST Gaps and Errors, with a detailed write-up submitted under separate cover, following IRAS’s published guidelines on requesting GST technical clarification. The business must also quantify the total value of transactions affected for each year pending IRAS’s ruling, though supporting documents can be retained rather than submitted upfront for ACAP and ACAP renewal cases specifically.

This is a welcome clarification rather than a new burden. It gives businesses (and their Reviewers) a defined channel and format for raising genuine points of disagreement, instead of an ad hoc email exchange, which should reduce back-and-forth delay near the renewal deadline.

What This Means for Your Compliance Calendar

ACAP renewal is not something that should surface as a surprise item three months before the deadline. IRAS’s own guidance recommends initiating the renewal process at the start of the last year of ACAP validity, engaging a Reviewer to examine a 12-month Review Year of past GST returns, with findings due within three months after expiry. That is a long runway, and the seventh edition changes give three concrete things to slot into it now.

Before the renewal review starts

• Confirm, in writing, whether the company has any exempt supplies at all (interest income, dividend income, exempt sales of residential property, or similar) and therefore whether partial exemption applies.
• If it does apply, pull together the workings showing how input tax has been apportioned between taxable and exempt supplies over the Review Year, and whether any longer-period adjustment was due and was made.
• Check the company’s classification of income streams (standard-rated, zero-rated, exempt, out-of-scope, reverse charge, Overseas Vendor Registration supplies) is current and matches what actually goes into the GST return, especially if there has been any change in business model since the last review.

Documentation to prepare now, not later

• A short internal memo or schedule setting out the partial exemption position, ready to hand to the ACAP Reviewer and to support paragraph 7.3(c) of the Renewal Report.
• A log of any GST gaps or errors identified since the last Post ACAP Review, with an honest assessment of whether each is recurring, and a working method for estimating error amounts where the actual figure cannot practically be recomputed.
• A one-page summary of any accounting software changes or major process changes (for example, outsourcing part of the finance function, or moving to a new ERP) since the last review, since this determines whether the Reviewer needs to re-test controls this cycle.

Where a Corporate Secretarial and Accounting Provider Fits In

For many Singapore SMEs, the person who first notices an ACAP status expiry date approaching is not the finance director, it is the corporate secretary or the outsourced accounting team who tracks statutory deadlines across the group. That is precisely why this update sits as comfortably in a compliance calendar conversation as it does in a tax technical one.

A good corporate secretarial and accounting services provider can help in three concrete ways: flagging the ACAP renewal window early against the wider annual compliance calendar (alongside ACRA annual return filing, whose own requirements are set out on ACRA’s how-to guides portal, and other statutory deadlines the company secretary already tracks); coordinating the document trail between the finance team, the ACAP Reviewer, and IRAS so nothing falls through the cracks between departments; and, where the underlying bookkeeping needs tidying up first, working through the GST classification and input tax positions before the Reviewer’s walk-through rather than during it.

Businesses that have not yet gone through a first ACAP review, but are considering it, may find it useful to first read our practical guide to ACAP and GST self-governance, which sets out the initial application process in more detail. Businesses already inside partial exemption territory should also review our separate piece on common mistakes in the partial exemption scheme, since several of the errors we see there are exactly what an ACAP Reviewer will now be testing for under the revised paragraph 3.9. Businesses that discover a genuine past error while preparing for renewal, rather than waiting for the Reviewer to find it, should also look at IRAS’s Assisted Self-Help Kit (ASK) voluntary disclosure framework, which can materially soften the consequences of a genuine, self-disclosed mistake.

A Practical Checklist Before Your Next ACAP Renewal

Conclusion

The seventh edition of IRAS’s ACAP renewal guide is a narrow, technical amendment on paper, but its practical effect reaches well beyond the tax team. A partially exempt business that has not tested its input tax apportionment, a Renewal Report missing the newly required business information, or a genuine technical disagreement raised without following the new clarification format, can all turn a routine renewal into an avoidable delay. Building these three checks into your company’s compliance calendar now, rather than in the month before the Renewal Report is due, is the difference between a smooth renewal and a scramble.

Businesses restructuring ahead of an ACAP renewal, or reviewing how exempt income streams (such as interest from related-party loans) feed into their broader financial management planning, should also factor GST control implications into that exercise early.

To speak with the team at Raffles Corporate Services, you can email [email protected] or call, SMS, or WhatsApp +65 8501 7133. We are happy to assist with any queries.

The Editorial Team, Raffles Corporate Services