Why finance should be involved from day one in ERP implementation

For many organisations, an ERP implementation starts with the right ambition: replace fragmented systems, improve efficiency, create better visibility, and build a more scalable way of working. Yet despite good intentions, many ERP projects end up taking longer than expected, costing more than planned, or delivering less business value than originally promised.

Why? Because too often, ERP is approached primarily as a technology project.

Why finance needs a seat at the table from day one

ERP is not just about software. It is about how your business operates. It affects how transactions are recorded, how processes flow across departments, how reporting is produced, and how decisions are made. That is exactly why finance should not be brought in halfway through the implementation. Finance should be involved from the very beginning.

ERP touches the core of the business

An ERP system sits at the centre of an organisation. It connects sales, purchasing, operations, inventory, projects, reporting, and accounting into one integrated environment. When implemented well, it can reduce manual work, improve data quality, and provide real-time visibility across the business.

ERP process design shapes financial reporting and control

But that integration also means one thing: decisions made during implementation have direct consequences for financial processes and reporting. Choices around workflows, master data, approval logic, revenue recognition, cost allocation, VAT treatment, intercompany flows, and reporting structures are not simply technical design decisions. They are business and financial decisions.

The cost of involving finance too late in ERP implementation

When finance is not involved early enough, these topics are often addressed too late — usually when testing begins, when reports do not reconcile, or when teams realise that the new system does not support the way the business needs to operate.

The hidden cost of treating ERP as an IT-only project

One of the most common causes of ERP underperformance is a gap between system design and operational reality. IT teams and software partners may successfully configure the platform from a technical perspective, but if the design is not grounded in finance and process expertise, important issues tend to surface only after go-live.

That can lead to familiar frustrations:

• reporting that does not match management needs,
• inefficient workarounds outside the ERP,
• manual reconciliations that were supposed to disappear,
• inconsistent master data,
• compliance risks,
• and limited trust in the numbers produced by the system.

At that stage, the project is no longer just an implementation challenge. It becomes a business adoption challenge.

Why finance should be involved from day one

Finance brings a perspective that is critical to the success of any ERP project. Not only because finance owns accounting and reporting, but because finance understands how operational activity ultimately translates into financial impact.

When finance is involved early, organisations are more likely to ask the right questions from the start:

• How should the chart of accounts and reporting structure support management reporting as well as statutory needs?
• How should approval workflows be designed to balance control and efficiency?
• How should revenue, costs, inventories, projects, and fixed assets be reflected in the system?
• Are VAT, invoicing, and compliance requirements correctly translated into the design?
• How should intercompany transactions and consolidation logic be supported?
• What data quality is needed to ensure reliable reporting after go-live?

These are not details to solve later. They are fundamental design choices that shape whether the ERP becomes a real business platform or just another operational system.

ERP success depends on process design, not just software configuration

A successful ERP implementation starts with process clarity. Before discussing modules, features, or customisation, organisations need a clear understanding of how they want their business processes to work.

This is where finance and process expertise become essential. ERP projects create value when they are used as an opportunity to simplify processes, standardise ways of working, remove unnecessary manual intervention, and improve internal control. If the project focuses only on replicating old habits in a new system, much of the value is lost.

The best ERP projects are therefore not software-first. 
They are business-first.

That means aligning technology with the realities of order-to-cash, procure-to-pay, record-to-report, project accounting, inventory handling, and management reporting — not just making sure the system is technically operational.

The finance–technology gap is where many projects fail

In many organisations, there is a natural gap between the people selecting or configuring the system and the people responsible for financial close, reporting, tax, or compliance. Both sides may be highly capable, but if that gap is not actively bridged, misunderstandings arise quickly.

A workflow may seem efficient operationally, while creating complexity for accounting. A data structure may look clean in the system, while failing to support reporting. A process may work for one country or entity, while creating issues in a broader group context.

This is why ERP implementations increasingly require a combination of technology expertise and finance understanding. It is not enough to know the software. It is equally important to understand the financial logic behind the business.

What organisations should do differently

If you are preparing for an ERP implementation — or if you are rethinking one that is already underway — there are a few principles that can make a major difference.

1. Treat ERP as a business transformation project. Define the business objectives first. The system should support those objectives, not drive them.
   
   
2. Involve finance at design stage, not only during testing. Finance should help shape the process model, reporting structure, control framework, and data design from the beginning.
   
   
3. Focus on end-to-end processes. Do not optimise one department in isolation. Look at how information flows across the organisation and how it ultimately affects reporting and decision-making.
   
   
4. Challenge existing ways of working. An ERP project is an opportunity to improve, not just to migrate.
   
   
5. Plan for adoption beyond go-live. Implementation success is not measured on launch day. It is measured by whether the organisation uses the system effectively and gains value from it over time.

The longer-term view matters: implementation support should not stop at go-live but continue as the business evolves and new needs emerge.

The real question is not “Which ERP?” but “How do we make it work for the business?”

Choosing the right platform matters. But in many cases, the bigger differentiator is not the software itself — it is the quality of the design, the clarity of the processes, the involvement of the right stakeholders, and the ability to translate business reality into system logic.

That is where many organisations either unlock value or create complexity.

ERP should help bring structure, visibility, and scalability to the business. To achieve that, finance needs a seat at the table from day one.

Because ERP is not just an IT project. It is a business project with financial consequences at its core.

Call to action

Considering an ERP implementation or reviewing your current setup? Get in touch with our Technology Services team to discuss how finance and technology can be aligned from the start.

At Grant Thornton, our Technology Services approach combines finance and technology expertise to help organisations build practical, scalable solutions that support both operational efficiency and reliable financial insight.