IRAS Assisted Compliance Assurance Programme (ACAP): A Practical Guide to GST Self-Governance

Most Singapore companies treat GST compliance as a quarterly filing exercise: get the numbers right, submit the return, move on. The Inland Revenue Authority of Singapore (IRAS) has a separate, voluntary track for businesses that want to go further, called the Assisted Compliance Assurance Programme, or ACAP. It rewards companies that build a genuinely robust GST control framework with years of audit certainty in return.

ACAP is not for every business, and it is not a light undertaking. But for larger SMEs and growing companies with complex GST positions, particularly those trading across borders or claiming input tax on significant capital expenditure, it can turn GST from a recurring source of anxiety into a settled, documented process. This guide explains what ACAP is, what it actually involves, and what changed under IRAS’s 2026 updates to the programme.

What ACAP Is and Why IRAS Created It

Since ACAP was introduced in 2011, IRAS has used it to shift the compliance conversation from transaction-by-transaction checking to systems-level assurance. Rather than IRAS auditing individual GST returns after the fact, a company under ACAP undertakes a holistic, risk-based review of its own GST controls, usually with the help of an accredited ACAP reviewer, and submits the findings to IRAS. Since the programme began, more than 1,100 businesses across a range of industries have applied for ACAP, and as at 31 March 2025 more than 900 businesses held ACAP status.

The Core Idea: A GST Control Framework

At the heart of ACAP is the concept of a GST Control Framework, an internal system of checks that ensures GST is being correctly determined, recorded and reported across every part of the business, from sales and purchases to intercompany transactions and capital asset disposals. IRAS’s ACAP e-Tax Guide sets out the review methodology in detail, covering areas such as control environment, risk assessment, control activities, and monitoring.

Benefits of ACAP Status

Companies that successfully attain ACAP status typically receive three to five years of exemption from GST audits, faster processing of GST refunds, quicker resolution of GST queries, and streamlined renewal of related GST schemes such as Major Exporter Scheme status. For a business that has already invested in strong internal controls, these benefits convert that investment directly into lower compliance friction with IRAS.

The Application and Review Process

A company applying for ACAP typically engages an IRAS-accredited ACAP reviewer to conduct the holistic review of its GST controls against the framework set out in the e-Tax Guide. The reviewer’s report and the company’s own risk assessment are then submitted to IRAS for evaluation. Where the review identifies gaps, IRAS may require these to be remediated before status is granted, so most companies budget for at least one round of internal fixes between the initial review and final submission.

Renewal: What Changed From 1 February 2026

IRAS has streamlined the ACAP renewal framework with effect from 1 February 2026. Businesses granted ACAP Renewal status from 1 January 2025 may no longer need to undergo a full Renewal Post ACAP Review (Renewal PAR) unless IRAS specifically instructs otherwise, reducing the ongoing compliance burden for companies with a track record of good GST governance. In place of the full review, IRAS has introduced a mandatory digital declaration submitted through FormSG as part of the renewal process.

IRAS’s Seventh Edition of the ACAP renewal guidance, published 1 September 2026, also updated Appendix 1 covering the application of partial exemption rules and the additional information required in the ACAP Renewal Report. Companies preparing a renewal should check they are working from the current edition of the e-Tax Guide rather than an older version, since the required supporting information has changed.

Is ACAP Right for Your Company?

ACAP tends to make the most sense for GST-registered companies with high transaction volumes, multiple business lines, cross-border supply chains, or a history of GST errors that management wants to close out permanently. Smaller companies with straightforward, low-volume GST positions may find the cost of the initial review outweighs the benefit, and are often better served by the simpler GST registration and filing disciplines already in place, alongside voluntary tools such as IRAS’s Assisted Self-Help Kit (ASK) for a lighter-touch health check.

Companies that have previously used the IRAS Voluntary Disclosure Programme to correct past GST errors are often good ACAP candidates, since the remediation work already done to fix historical issues overlaps significantly with what an ACAP review requires.

How ACAP Fits Into Your Wider GST Position

ACAP does not replace the underlying obligations to register correctly, file on time, and account for GST accurately, including on cross-border transactions covered by reverse charge and Overseas Vendor Registration, or on bad debts eligible for GST bad debt relief. It sits on top of good bookkeeping, so companies that have not yet tidied up their underlying bookkeeping processes should generally do that first.

Businesses trading internationally may also find it useful to keep an eye on broader Singapore business news and regulatory updates alongside their tax planning, since GST policy and enforcement priorities shift alongside wider economic conditions.

Getting Started

Before committing to an ACAP application, it is worth running an internal gap assessment against the current e-Tax Guide, estimating the cost of an accredited reviewer, and weighing that against the audit certainty and refund speed the status would bring. IRAS’s official guidance, including the full e-Tax Guide, is published on the IRAS website.

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