Disputes and investigations
Shareholder and partner conflicts, related-party questions, and internal investigations where the trail is in the books and bank records. Tracing and reconstruction are part of the engagement when the file requires them.
Services · Forensic Accounting
Forensic accountant in Toronto: litigation support and loss quantification
Amir Rosenthal, CPA, CA, LPA, CBV, CFF, is a forensic accountant in midtown Toronto. He works with counsel and private companies across Ontario on disputes, investigations, and loss quantification.
When the numbers have to hold up under scrutiny
Forensic accounting is for files where the accounts are contested or incomplete: a shareholder dispute, a suspected misappropriation, a claim for lost profits, or a matter headed toward discovery and testimony. The work is to reconstruct what happened, quantify the effect, and write it so a lawyer or a court can follow the reasoning.
A forensic accountant is often brought in by a lawyer, but can also be retained directly by a business owner or an insurer. The role is to answer a specific financial question independently and explain the answer in plain terms. For specific types of file, see damages quantification and expert reports, shareholder disputes, and family-law business valuation.
Loss quantification
Measuring damages, lost profits, or business interruption in a way that is tied to the company’s actual results and contracts—not a generic multiplier. Scope follows the claim and the available records.
Litigation support and expert witness
Working with counsel on document requests, reports, and testimony when an accountant’s explanation of the numbers is needed. The CFF designation sits alongside the CPA and CBV credentials for this work.
Relation to valuation
Some matters need a value at a date; others need a damages model. Where both arise, forensic analysis and business valuation can sit on the same file, with independence and purpose set clearly at the outset.
Related accounting support is described on the Ontario accountant, Toronto accountant, and North York accountant pages. The full practice list is under services. To discuss a file, use contact.
Forensic accounting questions
What is forensic accounting in a private-company setting?
It is accounting work aimed at a dispute, investigation, or claim: reconstructing what happened in the numbers, quantifying loss or damages, and presenting findings so counsel or a court can follow them. Amir Rosenthal holds the CFF designation and takes these files on where they fit the practice.
What does a forensic accountant do?
A forensic accountant looks at the financial records behind a dispute, claim, or investigation and explains what they show. That can mean tracing money, rebuilding incomplete records, measuring a loss, or reviewing another expert’s numbers, and then setting out the findings in a report that counsel or a court can rely on.
How does forensic accounting differ from ordinary year-end work?
Year-end closes the books for owners, lenders, and tax. Forensic work answers a specific question—often under a litigation or investigation timeline—and is written for a different audience. The same practitioner may already know the company from accounting work, but independence and scope are set for the forensic purpose.
When do Toronto companies need litigation support or an expert witness?
Shareholder and partner disputes, breach-of-contract claims, insurance and business-interruption matters, and similar files often need someone who can quantify loss and explain the accounts to counsel or a tribunal. Expert-witness work is included when the engagement calls for it.
How does forensic work relate to business valuation?
Some disputes turn on value as of a stated date; others turn on lost profits, wasted expenditure, or tracing of funds. A CBV conclusion or calculation may sit beside forensic analysis on the same file. See the business valuation page for valuation purposes and limits.
Do you only work with Toronto counsel and clients?
The office is in midtown Toronto at Yonge–Eglinton. Files come from Toronto, North York, the GTA, and elsewhere in Ontario. Meetings can be in person, by phone, or by video.
How is a forensic engagement started?
A complimentary introductory discussion is the usual first step. Call 416-955-0637 or email amirrosenthal@grunco.com with the nature of the dispute or investigation, the timeline, and who will rely on the work.
Complimentary discussion
If counsel is already involved, mention the timeline and the question you need answered when you call or write.