Managing the Year-End Audit Relationship

The relationship between a Financial Controller and the external auditor is one of the more important professional relationships in the role, and one that is frequently mismanaged in both directions. Treated as adversarial — a contest in which the finance function withholds and the auditor probes — it produces a difficult, inefficient audit and a poor outcome for everyone. Treated as a genuine professional relationship built on openness, competence and mutual respect, it produces a smoother audit, a better-served business, and an auditor who can be relied upon as a source of insight as well as assurance. The Financial Controller who understands how to manage this relationship well gets a materially better outcome than one who does not.

This guide is written for Financial Controllers who want to build and manage an effective relationship with their external auditor, beyond the mechanics of preparing for the audit itself. It covers the nature of the auditor relationship and why it matters, the foundations of a good working relationship, how to handle the difficult moments that any audit involves, how to get genuine value from the auditor beyond the audit opinion, and how to manage the relationship over time across multiple audit cycles. It is the companion to our guide on audit preparation, which covers the preparation; this guide covers the relationship.

Understanding the Auditor’s Position

A good working relationship starts with understanding the auditor’s role and constraints, which are different from those of the finance function. The auditor’s job is to form an independent opinion on the financial statements, and their professional standing and legal position depend on doing that properly. They are required to be independent, to exercise professional scepticism, and to gather sufficient evidence to support their opinion. This means the auditor will probe, will question, and will not simply accept management’s word — not because they distrust the Financial Controller personally, but because their role requires it. Understanding this prevents the Financial Controller from taking the auditor’s scrutiny personally or treating it as hostility, when it is simply the auditor doing their job.

It also helps to understand the pressures the auditor works under: the deadlines, the resourcing, the regulatory scrutiny that the audit profession itself faces, which has increased the rigour auditors are required to apply. An auditor who pushes hard on an area is often responding to the standards and the regulatory environment they operate in rather than being deliberately difficult. The Financial Controller who appreciates the auditor’s position — their role, their constraints, their pressures — can work with them more constructively than one who sees the auditor simply as an obstacle. This understanding is the foundation on which a genuine professional relationship is built, because it allows the Financial Controller to engage with the auditor as a fellow professional doing a necessary job rather than as an adversary to be managed.

The Foundations of a Good Working Relationship

The foundations of a good auditor relationship are straightforward but require genuine commitment: openness, competence, responsiveness and respect. Openness means being straight with the auditor — disclosing the issues rather than hoping they go unnoticed, being honest about the judgements and their uncertainties, and not playing games with information. An auditor who finds that the finance function has been open and honest comes to trust it, and that trust makes every subsequent audit easier; an auditor who discovers that information has been withheld or that the finance function has been less than candid becomes correspondingly more sceptical and more demanding.

Competence means the finance function does its job well — clean records, sound accounting, good preparation — which gives the auditor confidence and reduces the scrutiny the audit requires. Responsiveness means answering the auditor’s requests promptly and completely, which keeps the audit moving and signals a well-run operation. Respect means treating the audit team as professionals doing a necessary job, engaging constructively with their questions, and not being dismissive or obstructive. These foundations, sustained over time, build a relationship in which the auditor trusts the finance function and the finance function can rely on the auditor — a relationship that serves the business far better than the adversarial alternative. They are simple in principle and they require consistency in practice, which is what makes them a genuine achievement.

Handling the Difficult Moments

Every audit involves moments of tension — a disagreement over an accounting judgement, a challenge to a treatment the finance function has applied, a problem the auditor has found. How the Financial Controller handles these moments largely determines both the outcome and the health of the relationship. The instinct to become defensive, to dig in, or to treat the challenge as an attack is understandable but counterproductive. The better approach is to engage with the substance: to understand the auditor’s concern, to present the finance function’s reasoning clearly, and to work toward a resolution based on the merits rather than on who can hold out longest.

Where there is a genuine disagreement on an accounting judgement, the Financial Controller should be able to articulate and defend the finance function’s position with a clear rationale, while genuinely engaging with the auditor’s view. Sometimes the finance function’s position is right and a well-reasoned defence prevails; sometimes the auditor has identified something the finance function missed, and the right response is to accept it. The Financial Controller who approaches these disagreements as a professional discussion aimed at the right answer, rather than a contest to be won, both reaches better outcomes and preserves the relationship. Where a problem has been found, the constructive response is to address it openly rather than minimise it, because an auditor who sees issues handled honestly retains confidence in the finance function in a way that one who sees them downplayed does not. Handling the hard moments well is where the relationship is really tested, and where a mature professional approach pays off.

Getting Value Beyond the Audit Opinion

The auditor provides the audit opinion, but a well-managed auditor relationship delivers more than that. Auditors see many businesses, understand accounting and controls deeply, and observe how the finance function operates, which puts them in a position to offer genuine insight — on the control environment, on accounting matters, on how the finance function compares to others, on emerging requirements the business should prepare for. The Financial Controller who engages with the auditor as a source of insight, not just a provider of an opinion, can extract real value from the relationship.

This means taking the auditor’s observations seriously — the points they raise about controls and processes are often genuinely useful, and acting on them improves the finance function. It means using the auditor’s knowledge: asking their view on a difficult accounting question, understanding how they see emerging requirements, drawing on their experience of how other businesses handle things. It means treating the audit as an opportunity to learn about the finance function’s strengths and weaknesses from an expert external observer. The Financial Controller who does this turns the audit from a cost to be minimised into a source of value, and the auditor relationship from a necessary obligation into a genuinely useful professional connection. This value is available to any finance function that chooses to engage with the auditor constructively rather than treating them purely as a hurdle.

Managing the Relationship Over Time

The auditor relationship is not a single annual event but an ongoing professional relationship that develops over multiple audit cycles, and managing it over time pays dividends. A relationship built over several years, in which the auditor has come to trust the finance function and the finance function understands the auditor, produces progressively smoother audits, because the trust and understanding accumulate. The Financial Controller who invests in the relationship over time — maintaining contact between audits, addressing the auditor’s observations year on year, building the track record of openness and competence — reaps the benefit of an audit that becomes more straightforward as the relationship matures.

This ongoing management includes engaging with the auditor between audits where appropriate — consulting them on a significant accounting question before it becomes an audit issue, keeping them informed of major changes in the business, addressing the points from one audit before the next. It also includes managing the relationship professionally even through changes, such as a change of audit partner or firm, where the accumulated trust has to be rebuilt. The Financial Controller who treats the auditor relationship as a continuing professional relationship to be cultivated, rather than an annual transaction to be endured, builds something that serves the business well over the long term. A good auditor relationship, sustained over years, is a genuine asset to a finance function, and it is one that the Financial Controller builds through consistent professionalism rather than through any single grand gesture.

Communication Throughout the Audit

Good communication is the practical heart of a well-managed audit relationship, and it runs throughout the process rather than being confined to set-piece moments. Before the audit, agreeing the timetable, the scope and the expectations sets it up to run smoothly. During the audit, regular contact — a clear channel for the auditor’s requests, prompt responses, and a mechanism for surfacing and discussing issues as they arise — keeps the audit moving and prevents problems from festering. After the audit, debriefing on how it went and what could be improved feeds into the next cycle. This continuous communication is what allows the relationship to function, and its absence is what allows audits to go wrong.

The most important communication principle is no surprises in either direction. The Financial Controller should not be surprised by the auditor’s findings, because good communication during the audit surfaces issues as they arise rather than saving them for the end; and the auditor should not be surprised by the finance function, because the Financial Controller discloses the issues and the judgements openly rather than hoping they go unnoticed. A relationship in which both sides communicate openly and neither springs surprises on the other is one in which the audit runs predictably and the trust between the parties grows. The Financial Controller who establishes this open, continuous communication has done much of the work of managing the relationship well, because most audit difficulties trace back, in one way or another, to a failure of communication.

When the Relationship Is Under Strain

Not every auditor relationship is easy, and a Financial Controller will sometimes face a genuinely difficult situation — a fundamental disagreement on a material judgement, an auditor the finance function finds unreasonable, or a year in which the audit uncovers significant problems. Managing the relationship through these strains requires professionalism above all: engaging with the substance of the disagreement rather than letting it become personal, escalating appropriately within both organisations where a resolution cannot be reached at the working level, and keeping the focus on reaching the right answer rather than winning the argument. Even a strained relationship is better managed professionally than allowed to become openly adversarial.

Where the strain is fundamental and persistent — where the relationship with a particular firm or partner has genuinely broken down, or where the audit consistently fails to serve the business well — the question of changing auditor may eventually arise, though this is a significant step with its own costs and is usually a matter for the board and the audit committee rather than the Financial Controller alone. In most cases, though, the better path is to manage the existing relationship back to a constructive footing through professionalism and communication, because a change of auditor means rebuilding the accumulated trust and understanding from scratch. The Financial Controller who can navigate a strained audit relationship professionally, rather than letting it deteriorate, protects the business and demonstrates exactly the maturity the role requires.

The Audit Committee and Governance Dimension

In many businesses, particularly larger ones and those that are listed or PE-backed, the auditor relationship has a governance dimension that runs through the audit committee, and a Financial Controller should understand how this affects the relationship. The audit committee, a sub-committee of the board, oversees the relationship with the external auditor, the integrity of the financial reporting, and the effectiveness of the controls. The auditor reports to the audit committee, not just to management, and this gives the relationship a governance structure that the Financial Controller operates within rather than controls.

This matters because it shapes how issues are handled and where the auditor’s ultimate accountability lies. A significant disagreement between the finance function and the auditor may be brought to the audit committee; the auditor’s observations on controls and reporting go to the committee; the committee assesses the auditor’s effectiveness and independence. The Financial Controller who understands this governance structure manages the relationship appropriately within it — being open with the audit committee as well as the auditor, recognising that the auditor’s independence is a feature to be respected rather than an obstacle, and operating professionally within a structure designed to ensure the integrity of the financial reporting. Navigating this governance dimension well is part of managing the audit relationship at the level the more sophisticated businesses require, and it is increasingly part of what a senior Financial Controller is expected to handle.

The Relationship as a Two-Way Professional Exchange

It is worth recognising that the auditor relationship, managed well, is genuinely two-way: the finance function gives the auditor what they need to do their job, and the auditor gives the finance function assurance, insight and an external check that has real value. A Financial Controller who sees the relationship only as a one-way burden — the finance function serving the auditor’s demands — misses the value flowing the other way. The auditor’s scrutiny, uncomfortable as it can be, catches errors and weaknesses that the finance function might otherwise miss, and the auditor’s external perspective, drawn from seeing many businesses, is a resource the finance function can draw on.

Approaching the relationship as a professional exchange between two parties who each bring something to it produces a healthier dynamic than treating it as a contest or an imposition. The Financial Controller benefits from the auditor’s expertise and external view; the auditor benefits from a finance function that is open, competent and constructive; and the business benefits from an audit that is both rigorous and efficient. This framing — the relationship as a mutually valuable professional exchange rather than an adversarial obligation — is ultimately what allows a Financial Controller to get the most from the auditor relationship, and it is the perspective that experienced, confident Financial Controllers tend to adopt. Building the relationship on that basis, year after year, is what turns the annual audit from something to be survived into something that genuinely strengthens the finance function.