Aon Accountant interview questions & guide 2026

The following questions are representative of the patterns observed in Aon interview loops for accounting roles. These are designed to test your technical proficiency, your ability to handle the mechanics of the job, and your cultural alignment with the firm.

Finance & Accounting Technicals

This category forms the core of your interview. Interviewers will look for your ability to apply accounting principles to real-world scenarios.

• Walk me through the steps you take to prepare for a month-end close.
• How do you handle revenue recognition under ASC 606 for a multi-year service contract?

Preparing for an Accountant role at Aon requires a balance of technical rigor and behavioral polish. You should approach your preparation by reviewing the core accounting cycle and reflecting on how your past experiences align with the demands of a high-volume, global organization.

Technical Knowledge – You must have a rock-solid understanding of GAAP. Be prepared to discuss how you have applied these standards in previous roles, specifically regarding revenue recognition and accruals.

Problem-Solving Under Pressure – The month-end close is a high-pressure environment. Interviewers look for candidates who remain calm, systematic, and detail-oriented even when deadlines are tight.

Fit and Motivation – Aon values candidates who take ownership of their work. Be ready to articulate why you want to work for a global leader in professional services and how your background makes you a reliable addition to their finance team.

The interview process at Aon is structured to evaluate both your technical competency and your ability to fit into a collaborative, high-performance culture. You can typically expect an initial screening round—often conducted online or via phone—where recruiters or hiring managers assess your background, your interest in the firm, and your basic qualifications. This is followed by one or more technical rounds where you will meet with finance team members or senior controllers to dive deep into your accounting knowledge and your experience with closing processes.

The pace is professional and purposeful. You should expect the interviewers to be direct and focused on your ability to deliver immediate value. The process is designed to filter for candidates who possess both the technical depth to handle Aon’s financial complexity and the communication skills to work effectively across departments.

This visual timeline illustrates the typical progression from an initial screen to final rounds. Use this to structure your study schedule, ensuring you have refreshed your knowledge of GAAP and month-end workflows well before your first technical interview. Note that timelines can vary based on the specific team's needs, so maintain flexibility in your planning.

Financial Reporting & Accuracy

This area is the most heavily weighted. You are evaluated on your mastery of the accounting cycle.

• Month-end close – Understanding the sequence of tasks, from ledger maintenance to final reporting.
• GAAP compliance – Ensuring all work adheres to standard accounting practices.
• Journal entries – Being able to describe the debit and credit impact of various business transactions.

As an Accountant at Aon, your daily work revolves around the precision of the general ledger. You will be responsible for preparing and posting journal entries, ensuring that all financial transactions are captured accurately. A significant portion of your time will be dedicated to account reconciliations, where you will investigate and resolve discrepancies to ensure the balance sheet remains clean.

You will play an active role in the month-end close process, working to meet strict deadlines while maintaining high standards of data integrity. This involves collaborating with various business units to ensure that accruals are correctly estimated and recorded. You will not work in a vacuum; you will frequently communicate with budget owners and senior finance staff to explain financial variances and provide supporting documentation for audits.

A strong candidate for this role at Aon combines technical accounting expertise with the soft skills necessary to navigate a large, matrixed organization.

• Technical Skills – Proficiency in GAAP is non-negotiable. You should be highly skilled in Excel, as it is the primary tool for data manipulation and reconciliation. Experience with large ERP systems is highly valued.

• Experience – Candidates typically demonstrate a track record of success in corporate accounting or audit environments.

• Soft Skills – You must be a clear communicator who can translate financial data into actionable insights for non-finance partners.

• Must-have – Strong grasp of ASC 606, experience with the full month-end close cycle, and advanced Excel proficiency.

• Nice-to-have – Professional certifications such as a CPA or equivalent; prior experience in the insurance or professional services sector.

Q: How difficult are the technical accounting questions? A: The questions are designed to be practical. You won't be asked abstract theories; rather, you will be asked how you handle specific tasks like accruals or reconciliations in a real-world setting.

Q: How can I stand out during the interview? A: Focus on your process. When answering technical questions, explain your methodology—how you verify data, how you ensure compliance, and how you communicate findings to stakeholders.

Q: What is the culture like at Aon? A: Aon is a global firm that values professional maturity and collaboration. The environment is fast-paced, so demonstrating that you can take ownership of your tasks is highly valued.

• Structure your answers – Use the STAR method (Situation, Task, Action, Result) for behavioral questions to keep your responses concise and impactful.
• Know your resume – Be prepared to talk in detail about any project or task you have listed. If you mention revenue recognition, expect a follow-up question on the specifics of ASC 606.
• Ask thoughtful questions – At the end of your interview, ask about the team’s current priorities or how the accounting function supports the firm’s broader strategy.
• Be ready for the "why" – Always be prepared to explain the "why" behind an accounting treatment. It shows you understand the logic, not just the rote process.

Securing a role as an Accountant at Aon is a significant career milestone. By focusing your preparation on mastering the core accounting mechanics—specifically GAAP, month-end close, and ASC 606—you will be well-positioned to demonstrate your value to the hiring team. Remember that the interviewers are looking for a blend of technical precision and the ability to operate effectively within a large, global organization.

You can explore additional interview insights, practice questions, and preparation resources on Dataford. We encourage you to approach your interview with confidence; your professional background and thorough preparation are your greatest assets.

The compensation data provided reflects the market range for this position, typically accounting for factors such as experience, location, and specific responsibilities within the Aon finance structure. Use this information to understand the total reward package and ensure your expectations align with industry standards for an Accountant at this level.