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Audit vs Agreed-Upon Procedures: Which approach does your business need?

24 September 2026

When businesses require independent verification of financial information, processes or controls, many assume that a full audit is the only option. In reality, there are different ways to obtain independent scrutiny of financial information, and in some circumstances a more targeted approach may be the better fit.

For organisations that need comfort over a specific balance, transaction stream or area of risk, an Agreed-Upon Procedures (AUP) engagement under ISRS 4400 can provide focused reporting without the scope, cost and timescales typically associated with a full audit. 

Understanding the difference between an audit and agreed-upon procedures can help businesses choose the most appropriate approach for their requirements. 

What Is ISRS 4400? 

ISRS 4400 is the professional standard that governs Agreed-Upon Procedures engagements. 

Rather than providing an opinion on an entire set of financial statements, an agreed-upon procedures engagement focuses on specific areas identified by the client or other stakeholders. The procedures to be performed are agreed in advance, carried out by the accountant and reported on factually. 

The result is a report of findings rather than an audit opinion. 

This allows businesses, shareholders, lenders and other stakeholders to obtain independent verification over particular areas of interest without commissioning a full audit. 

Who might benefit from agreed-upon procedures? 

An ISRS 4400 engagement may be useful where independent reporting is needed on a specific issue rather than an audit opinion on the financial statements as a whole. 

Examples include: 

Shareholders seeking independent confirmation of particular financial information
Lenders requiring verification as part of financing arrangements
Businesses involved in acquisitions, disposals or investment transactions
Organisations needing comfort over a specific financial balance or process
Companies required to meet contractual or regulatory reporting obligations
Management teams seeking independent findings on an identified risk area

In these situations, agreed-upon procedures can provide targeted insight and independent reporting without the broader scope of an audit engagement. 

What are agreed-upon procedures? 

Agreed-upon procedures engagements are highly flexible. 

The client and accountant agree in advance exactly what work will be performed and which areas will be reviewed. The procedures can then be tailored to address specific objectives or stakeholder requirements. 

Common examples include reviewing: 

  • Revenue transactions 
  • Debtor balances 
  • Cash balances 
  • Specific contracts or transactions 
  • Regulatory compliance requirements 
  • Internal controls over key processes 
  • Financial information used during due diligence exercises 

Unlike an audit, the accountant does not provide an overall opinion or conclusion. Instead, the report sets out the procedures performed and the factual findings identified. 

Users of the report can then draw their own conclusions based on those findings.

Audit vs agreed-upon procedures: what’s the difference? 

While both engagements involve independent professional scrutiny, they are designed to achieve different outcomes.

AreaISRS 4400 agreed-upon procedures Audit
AssuranceNo assurance conclusion is expressedReasonable assurance
ScopeSpecific agreed areas onlyEntire financial statements
CostGenerally lowerGenerally higher
Time RequiredTypically fasterMore time intensive
Testing ApproachTargeted procedures agreed in advanceComprehensive testing required under audit standards
Report IssuedReport of procedures and factual findingsIndependent audit option
FlexibilityHighly tailored to stakeholder requirementsDriven by auditing standards and regulatory requirements

The key distinction is that an audit provides an independent opinion on the financial statements as a whole, while agreed-upon procedures report factual findings relating only to the specific procedures requested. 

Why might a business choose agreed-upon procedures instead of an audit? 

For many organisations, the requirement is not necessarily for a full audit opinion. 

A shareholder may require comfort over a specific transaction. A lender may need verification of financial information linked to funding arrangements. A buyer may need reassurance over a particular balance during a due diligence process. 

In these circumstances, agreed-upon procedures can often deliver the information stakeholders need while avoiding unnecessary cost and disruption. 

Benefits of agreed-upon procedures 

Agreed-upon procedures engagements offer several advantages:

Lower cost than a full audit
Faster completion times
Flexible and tailored scope
Focus on specific areas of concern
Reduced disruption to the wider business
Independent reporting on identified risks or requirements

This makes them particularly attractive when independent findings are required on a defined area rather than an audit opinion on the financial statements as a whole. 

Benefits of an audit 

Despite the advantages of agreed-upon procedures, an audit remains the most appropriate solution in many situations. 

A full audit provides: 

  • Independent assurance over the financial statements as a whole 
  • An audit opinion that can be relied upon by stakeholders 
  • Greater confidence for shareholders, lenders and investors 
  • Comprehensive testing undertaken in accordance with auditing standards 
  • Compliance with statutory or regulatory requirements where applicable

Where a higher level of assurance is required, or an audit is mandatory, a full audit remains the preferred option. 

Understanding the limitations 

Neither engagement is simply a substitute for the other. 

Agreed-upon procedures

  • Do not provide an audit opinion
  • Are limited to the agreed scope 
  • Do not provide assurance over the wider business or financial statements 
  • Require users to interpret the findings themselves 

Audit

  • Require a greater time commitment 
  • Can be more resource intensive 
  • Typically involve higher costs 
  • Cover a broader range of areas than some stakeholders may require 

The most suitable option will depend on the objectives of the business and the needs of those relying on the information. 

Which approach is right for your business? 

There is no one-size-fits-all approach to independent financial scrutiny. 

In some situations, a full audit will be the most appropriate choice because stakeholders require assurance over the financial statements as a whole. In others, stakeholders may simply need independent findings on a specific balance, transaction or process. 

Understanding what information is required, who needs it and why is the first step in determining the right approach. 

Looking for further support?

If you would like to discuss whether an audit or an agreed-upon procedures engagement is the best fit for your organisation, our Audit & Assurance team would be happy to help. 

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