MES Audit in Singapore: Staying Compliant Under the Major Exporter Scheme

What Is the Major Exporter Scheme (MES)?

MES is a GST scheme administered by IRAS that allows qualifying businesses to import non-dutiable goods without paying GST upfront at the point of importation. Normally, GST is payable to Singapore Customs the moment goods land, and businesses recover it later through their GST returns. Under MES, that payment is suspended entirely, which is a meaningful cash flow advantage for import-heavy trading and exporting companies.

Who Qualifies for MES

To be approved, a business generally needs to meet the following conditions:

Registered for GST with the Comptroller, and financially sound — not under bankruptcy, liquidation, receivership, or judicial management. Its zero-rated supplies (typically exports) must exceed 50% of total supplies, or exceed S$10 million over a continuous 12-month period. The business must maintain proper accounting records and internal controls, have a good compliance track record with both Singapore Customs and IRAS (timely filing and payment history), and complete a certified self-review under the Assisted Self-Help Kit (ASK) — unless it already participates in IRAS's Assisted Compliance Assurance Programme (ACAP).

Applications are made by submitting Form GST F10 together with 12 months of actual trading figures (or projected figures for newer businesses), alongside the certified ASK declaration. IRAS typically informs applicants of the outcome within one month.

What an MES Audit Actually Involves

"MES audit" is often used loosely to describe three related but distinct checks:

1. The ASK Annual Review (self-review). Businesses — or their appointed accredited tax professional — must review GST controls, filing accuracy, and record-keeping, then submit the certified "ASK: Declaration Form on Completing Annual Review & Voluntary Disclosure of Errors." It's designed to catch and voluntarily disclose errors before IRAS finds them, and it covers areas such as GST registration processes, return accuracy, and documentation for zero-rated exports.

2. IRAS's own compliance monitoring. IRAS actively monitors approved MES holders on an ongoing basis and can review, suspend, or revoke MES status where it finds inaccurate GST returns, GST suspension applied to imports that don't qualify, or supplies falling below the eligibility thresholds without correction.

3. Renewal review. MES approval is not permanent. Initial approval typically runs for three years, and renewals — granted via Form R1 — are generally valid for five years at a time. Each renewal requires a fresh certified ASK declaration (or valid ACAP/Post-ACAP documentation), current trading figures, and, where the business imports on behalf of third parties, a signed Letter of Confirmation & Undertaking. Form R1 must be submitted through the myTax Portal by the deadline stated.

How to Prepare for an MES Audit or Review - Get Professional Support

Because the certified ASK declaration must be signed off by an accredited tax professional, and because the consequences of a failed review can include repayment of suspended GST and loss of MES status, many businesses engage a tax advisory firm to run the ASK review, prepare renewal submissions, and remediate control gaps before they become audit findings.

If your business holds MES status or is applying for it, our team can help you run an ASK-ready self-review, prepare your Form R1 renewal, and put the record-keeping controls in place to keep your GST suspension intact. Whatsapp us at +65 81980700 to discuss your MES compliance position.

This article reflects the IRAS GST Major Exporter Scheme e-Tax Guide (18th edition, 3 August 2026) and related IRAS guidance as at the date of publication. GST rules and thresholds can change.