GTO / Sales Audit
GTO Sales Audit in Singapore: A Guide for Retail & F&B Tenants
Gross Turnover clauses are contractual, not one-size-fits-all. This guide explains what a GTO audit is, why the tenancy agreement matters, which sales records are commonly reviewed and how to prepare before your submission deadline.
Updated 31 August 2026
Lease-first approach
Vertex Assurance Insights
What is a GTO sales audit?
A Gross Turnover (GTO) sales audit is a focused assurance engagement over sales or revenue reported for a defined contractual period. It is commonly associated with retail, F&B and other commercial tenancies where rent or another contractual obligation is linked to reported turnover.
The engagement is narrower than a statutory financial statement audit. The auditor focuses on the turnover definition, reporting period and evidence specified by the relevant agreement rather than auditing the company’s entire set of financial statements.
The key document is the tenancy agreement. Before deciding what should be included or excluded from GTO, identify the exact contractual definition of “Gross Turnover”, the relevant period, the required form of certification and the submission deadline.
Who may need a GTO audit?
A GTO audit may be required where a tenancy agreement or other commercial contract requires independent verification of sales. Common examples include:
Business type
Typical context
Retail stores
Mall or commercial tenancy with turnover-based rent or reporting clauses
Restaurants, cafés and quick-service outlets
Retail or F&B premises with a contractual GTO definition
Beauty, wellness and service outlets
Commercial units where rent or reporting is linked to sales
Entertainment or enrichment operators
Premises with contractual turnover reporting
Airport or transport-hub concessionaires
Concession or tenancy arrangements that require certified revenue information
Do not assume that every mall tenant has the same requirement. The obligation comes from the specific tenancy or concession agreement.
Read the lease before touching the numbers.
Two businesses can occupy similar premises yet have different GTO definitions. The agreement may determine how sales are measured, which channels are included, which deductions are permitted, the audit period and the form of auditor’s certificate required.
Items to locate in the tenancy agreement
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The definition of Gross Turnover / Gross Sales
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The base-rent and turnover-rent mechanism, if applicable
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The lease year or reporting period
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The required submission deadline
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Permitted exclusions or deductions
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Record-keeping and audit rights
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The required signatory or independent auditor wording
The key document is the tenancy agreement. Before deciding what should be included or excluded from GTO, identify the exact contractual definition of “Gross Turnover”, the relevant period, the required form of certification and the submission deadline.
What actually counts as Gross Turnover?
This is often the most important part of the engagement. Modern sales are collected through multiple channels, and the contractual treatment of each channel can differ.
Revenue / adjustment item
What to check in the agreement and records
Food-delivery platform sales
Whether orders fulfilled from the leased premises are included, and whether platform fees affect the reported amount.
Digital vouchers, gift cards and loyalty credits
Whether turnover is based on face value, redemption value or the net amount received.
GST and service charge
Whether the contractual GTO definition is inclusive or exclusive of these amounts.
Refunds, cancellations and voids
Whether deductions are allowed and what POS or banking evidence is required.
Online, wholesale or B2B orders
Whether sales generated or fulfilled from the premises fall within the contractual definition.
Discounts and promotions
Whether GTO is measured before or after discounts and who funds the promotion.
The purpose of the audit is not to impose a generic definition of turnover. It is to test the reported figure against the contractual definition and the underlying records.
Documents commonly required for a GTO audit
The exact request list depends on the agreement and the business’s sales systems. Common starting documents include:
Document
Why it matters
Signed tenancy agreement / reporting clause
Defines the reporting period, GTO calculation, audit requirement and submission terms.
Monthly or annual POS sales reports
Provides the primary record of transaction-level or period sales.
General ledger revenue records
Allows reconciliation between operational sales and accounting records.
Bank and merchant settlement reports
Supports reconciliation of card, NETS, PayNow and other settlement channels.
Delivery-platform or online-order statements
Supports sales generated through third-party platforms where relevant.
Refund, discount and void reports
Supports adjustments or deductions from reported sales.
GST returns, where relevant
May provide an additional reasonableness cross-check over reported revenue.
Prior-period GTO certificate
Helps identify the prior reporting format and recurring lease requirements.
Deadlines and late submission: check the contract, not a generic timetable.
The submission deadline for a GTO certificate is usually set by the tenancy or concession agreement. Some agreements also contain rights or remedies if the tenant fails to provide the required certificate on time.
Those consequences can vary materially. They may include follow-up requests, contractual charges, the landlord exercising audit rights, or other remedies specified in the lease.
If the deadline is close: send the auditor the tenancy agreement and available sales records immediately. The auditor needs to know both the contractual due date and the state of the underlying records before giving a realistic completion timeline.
How to prepare for a smoother GTO audit
01
Confirm the reporting clause
Provide the signed tenancy agreement and identify the GTO definition, reporting period and deadline.
02
Export complete sales reports
Prepare POS reports for the full period and avoid manually re-keying figures where system-generated reports are available.
03
Reconcile major channels
Make sure card, NETS, PayNow, delivery-platform and bank settlements can be traced to the reported sales population.
04
Explain adjustments early
Prepare support for refunds, voids, discounts, vouchers and other exclusions instead of waiting for the auditor to discover the reconciling items.
Frequently Asked Questions
This guide is general information about common GTO audit considerations. The tenancy or concession agreement governs the actual reporting requirement, definition of turnover, deadline and contractual remedies.