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How to Become an Auditor (Internal or External) in Ontario: Salary, Training, and Career Outlook

by Occupations.ca Team
12 min read

Have you ever found yourself spotting errors in spreadsheets, asking “How do we know this is right?”, or wondering how organizations can work smarter and stay compliant? If yes, a career as an Auditor (Internal or External) in Ontario could be a strong fit for you. In this role, you help businesses, public organizations, and non-profits make better decisions by checking financial Information, testing Controls, and reducing risk. Whether you’re a student planning your first degree or an experienced professional looking to pivot, Ontario offers clear pathways and strong job prospects in auditing.

Job Description

Auditors in Ontario work in two main areas: External Audit and Internal Audit.

  • External auditors work for public Accounting firms and provide independent assurance on financial statements. Ontario companies, charities, and public sector organizations often need this assurance for lenders, investors, boards, and regulators. External auditors follow Canadian Auditing Standards and, at the senior level, may sign audit reports if they hold a Public Accounting Licence (PAL) through CPA Ontario.
  • Internal auditors work inside organizations (or as consultants) to evaluate and improve risk Management, internal controls, and governance. They follow the IIA’s International Professional Practices Framework (IPPF) and often hold certifications like CIA (Certified Internal Auditor) or CISA (for IT audit).

You may work in sectors such as financial services, technology, manufacturing, healthcare, education, municipalities, the Ontario Public Service, and not-for-profits. Employers range from Big Four firms to mid-size public accounting firms, Crown agencies, hospitals, and universities.

Daily Work Activities

As an auditor in Ontario, you will typically:

  • Meet with clients or departments to understand processes and risks.
  • Plan audit procedures, set scopes, and develop testing strategies.
  • Perform walkthroughs of controls and collect evidence.
  • Test samples of transactions using analytic tools and documentation review.
  • Identify control gaps, Compliance issues, and potential fraud indicators.
  • Prepare clear workpapers and audit files that Support your conclusions.
  • Draft reports with findings, risk ratings, and practical recommendations.
  • Present results to management, audit committees, or boards.
  • Follow up on remediation plans and timelines.
  • Continue Professional Development to maintain certifications and keep pace with standards.

External auditors experience defined “busy seasons” tied to fiscal year-ends. Internal auditors work in annual audit cycles and also support advisory projects and special investigations.

Main Tasks

  • Plan and execute risk-based audits (operational, compliance, financial, IT).
  • Evaluate internal controls against frameworks (e.g., COSO).
  • Test account balances and disclosures under IFRS or ASPE.
  • Use data analytics (Excel, Power BI, SQL, IDEA/ACL) to test large populations.
  • Document findings, assess root causes, and recommend improvements.
  • Communicate results clearly to non-technical stakeholders.
  • Coordinate with legal, compliance, Finance, IT, and Cybersecurity teams.
  • Adhere to professional ethics, independence, and confidentiality rules.
  • Support fraud risk assessments and whistleblower procedures where applicable.
  • Monitor regulatory changes affecting Ontario organizations.

Required Education

Diplomas and Degrees

  • Certificate (1 year)

    • Postgraduate certificates in accounting, internal audit, analytics, or risk can help you transition or upskill. These are common for individuals who already hold a degree and want to meet CPA course prerequisites or move into audit-related roles.

  • College Diploma / Advanced Diploma (2–3 years)

    • Business–Accounting programs develop foundational skills (bookkeeping, financial reporting, Taxation, information systems) that are practical for junior roles and can lead to degree completion pathways and CPA prerequisites.

  • Bachelor’s Degree (3–4 years)

    • A BCom/BBA/BAcc with an accounting specialization is the most direct route to external audit and many internal audit jobs in Ontario. If you want to become a CPA and possibly a Licensed Public Accountant (for signing audit opinions), a recognized degree is essential.

  • Professional designations that strengthen your profile in Ontario:

    • CPA (Chartered Professional Accountant) – the standard for external auditors and highly valued in internal audit. See CPA Ontario for education and licensing.
    • CIA (Certified Internal Auditor) – the gold standard for internal audit.
    • CISA (Certified Information Systems Auditor) – strong for IT and cybersecurity audit.
    • CFE (Certified Fraud Examiner) – valuable for fraud investigations.
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Length of Studies

  • College diploma: 2 years; advanced diploma: 3 years.
  • Bachelor’s degree: 4 years (some 3-year programs exist).
  • CPA path after degree: CPA PEP takes about 2–2.5 years part-time while you work, plus the Common Final Examination (CFE). You also need 30 months of relevant practical experience.
  • CIA certification: self-paced; many complete the three exams within 6–18 months, depending on experience and study time.
  • CISA certification: typically 3–12 months preparation, plus experience requirements.

Where to Study? (Ontario)

Universities (Accounting-focused undergraduate programs)

Colleges (Diplomas and Graduate Certificates)

Helpful external links

Salary and Working Conditions

Salary in Ontario

Your pay will vary by region, sector, and credential status.

  • Entry-level (Analyst/Staff Auditor, often in progress toward CPA or CIA): approximately $55,000–$70,000.
  • Intermediate/Senior Auditor (CPA/CIA obtained or nearing completion): approximately $70,000–$95,000.
  • Manager: approximately $95,000–$135,000.
  • Senior Manager/Associate Director: approximately $120,000–$180,000+.
  • Director/Partner (public practice) or Head of Internal Audit: $180,000–$300,000+, with bonuses and profit-sharing varying widely.
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For current provincial wage data, consult Government of Canada Job Bank (Ontario):

Note: External audit in large firms may start slightly lower but has rapid progression; internal audit in financial services and specialized IT audit roles can pay higher earlier.

Working Conditions

  • Hours: Expect busy seasons (e.g., January–April for many year-ends). Internal audit hours are steadier but can spike around large projects or regulatory deadlines.
  • Overtime: Common in external audit (often compensated via overtime pay or time in lieu). Internal audit may offer more balance, especially in the public sector.
  • Work setting: Many employers offer hybrid work. External auditors may Travel to client sites. Internal auditors typically have less travel, with occasional site visits.
  • Tools: You will use Microsoft Excel, Power BI, audit management software, and data analytics platforms (e.g., IDEA, ACL/Diligent HighBond, SQL).
  • Ethics and independence: External auditors must maintain strict independence. Internal auditors report functionally to an Audit Committee or senior Leadership to safeguard objectivity.

Job Outlook

Ontario has a consistent need for auditors due to regulatory demands, financial reporting complexity, and cybersecurity and data risks. Official outlooks:

Demand is strongest in the GTA, Ottawa, and larger urban centres, especially in financial services, public sector, technology, healthcare, and higher education.

Key Skills

Soft Skills

  • Critical thinking and professional skepticism.
  • Communication (clear writing, presentation, and storytelling with data).
  • Collaboration and client service.
  • Time management and ability to handle multiple deadlines.
  • Adaptability to changing standards and systems.
  • Ethics and integrity; handling confidential information with care.
  • Relationship building with stakeholders across finance, IT, and operations.

Hard Skills

  • Accounting standards: IFRS and ASPE (Ontario companies), PSAS for public sector.
  • Audit standards: Canadian Auditing Standards (external audit) and IIA IPPF (internal audit).
  • Internal controls and risk: COSO frameworks; IT General Controls (ITGCs).
  • Data analytics: advanced Excel, Power BI, SQL basics; IDEA/ACL; understanding sampling and data integrity.
  • Information systems: ERP exposure (SAP, Oracle, Microsoft Dynamics), and cybersecurity basics for IT audit.
  • Regulatory knowledge: Ontario-specific legislation affecting sectors (e.g., not-for-profit reporting, public sector transparency, sectoral compliance requirements).
  • Report writing: concise, structured findings, and practical recommendations.

Advantages and Disadvantages

Advantages

  • Highly transferable skills across industries in Ontario.
  • Clear professional pathways (CPA, CIA, CISA) and strong employer support for Training.
  • Stable demand and attractive long-term compensation.
  • Exposure to many business models, leaders, and systems early in your career.
  • Opportunities to move into risk management, finance leadership, forensics, Consulting, or public service.

Disadvantages

  • Long hours in busy periods, especially in external audit.
  • Tight deadlines and pressure to deliver high-quality workpapers and reports.
  • Travel may be required (more for external audit).
  • Need for ongoing professional development to maintain designations and stay current with standards and technology.
  • External auditors face strict independence rules that can limit certain activities or Investments.

Expert Opinion

If you’re studying in Ontario and wondering how to break in, here’s a proven path: aim for a co-op or internship in audit during your degree or diploma-to-degree transition. Co-op experience is often the single biggest factor in securing full-time offers at public accounting firms and in internal audit departments. In your first roles, focus on building strong workpaper discipline, learning data analytics, and developing client communication skills. If you plan to work in external audit and eventually sign audit reports, map your steps to the CPA and then the Public Accounting Licence (PAL) through CPA Ontario early, so you can choose the right courses and practical experience.

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For internal audit, the CIA is highly respected and complements a CPA. If you’re drawn to systems, cybersecurity, or analytics, CISA can open doors to IT audit roles, which are in high demand across Ontario’s banks, insurers, tech firms, and public sector organizations. Consider starting in external audit for broad exposure, then moving to internal audit or risk after a few years if you want more advisory work and a steadier schedule.

Networking matters. Attend campus recruiting events, join student accounting societies, meet employers at CPA Ontario and IIA Canada events, and consider volunteering as a student case competition judge or mentor later on. Strong writing samples (e.g., anonymized audit memos) and hands-on examples of Power BI dashboards or SQL queries can set you apart. Above all, show curiosity and a solutions mindset—leaders in Ontario want auditors who help the business improve, not just point out what’s wrong.

FAQ

Do I need a CPA to become an internal or external auditor in Ontario?

  • External audit: To sign audit opinions in Ontario, you need to be a CPA and hold a Public Accounting Licence (PAL) from CPA Ontario. Many junior external auditors are in-progress on the CPA while they work. Learn more: https://www.cpaontario.ca/members/public-accounting/public-accounting-licence
  • Internal audit: A CPA is highly valued but not strictly required. The CIA (Certified Internal Auditor) is the core internal audit credential. Many Ontario internal auditors hold CPA, CIA, or both. See IIA Canada: https://iia.ca/en/

I am internationally trained. How can I work as an auditor in Ontario?

Start by having your education assessed through CPA Ontario if you plan to pursue the CPA: https://www.cpaontario.ca/become-a-cpa. You may receive credit for prior coursework and be advised to complete specific prerequisites (via university or CPA PREP). If your goal is internal audit, consider writing the CIA exams and building Canadian experience. Some Ontario colleges and universities offer bridging or graduate certificate programs to help newcomers meet CPA requirements and adapt to Canadian standards.

What’s the difference between internal audit, external audit, and compliance in Ontario employers?

  • External audit provides independent assurance on financial statements and is performed by licensed public accounting firms under Canadian Auditing Standards.
  • Internal audit is an in-house or co-sourced function that evaluates controls, governance, and risk management using the IIA’s IPPF. It focuses on improvement and risk reduction.
  • Compliance ensures that laws, rules, and policies are followed (e.g., anti-money laundering, privacy, sector-specific regulations). Compliance teams often partner with internal audit but have different mandates.

Are there hybrid or remote auditor roles in Ontario?

Yes. Many Ontario employers now offer hybrid arrangements. External auditors often work remotely for planning and testing but still visit client sites for inventories, walkthroughs, or year-end procedures. Internal auditors commonly work hybrid, with on-site visits for operational reviews, IT Data Center walk-throughs, or stakeholder interviews. Public sector and financial institutions tend to have well-defined hybrid policies.

Which sectors pay the most for auditors in Ontario?

Compensation is typically higher in financial services, technology, and consulting, especially for roles in IT audit, model risk, cybersecurity, or data analytics. Senior internal audit roles in large banks and insurers, as well as external audit leadership in national and global firms, often top the pay scale. Specialized credentials (CPA, CIA, CISA) and experience with analytics tools can accelerate salary growth.

Useful career links:

If you’re ready to start, map out your education to meet CPA or CIA requirements, target a co-op or internship, and build your analytics and communication skills. Ontario’s auditing field rewards professionals who are ethical, curious, and committed to continuous improvement.

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