Calculate damages in a legal malpractice claim
Posted: Mon May 18, 2026 11:28 am
To calculate damages in a legal malpractice claim, courts in British Columbia use a "trial within a trial" format. The goal is to put you in the financial position you would have been in had the lawyer not made the error.
1. The Core Calculation: "But For" Causation
To claim damages, you must prove on a balance of probabilities that "but for" the lawyer's negligence, you would have achieved a better financial or legal outcome.
If the lawyer lost a lawsuit: You must prove you had a winning case and quantify what you would have been realistically awarded in that lawsuit.
If the lawyer missed a limitation deadline: You calculate the value of the lost claim minus the likelihood that the defendant could have successfully defended it.
If the lawyer made a business/transactional error: Damages are measured objectively as your net financial loss in that specific transaction.
2. Available Heads of DamageIf you prove the lawyer's negligence, you can seek several types of compensation:
Out-of-pocket expenses (Special Damages): Exact reimbursement for wasted legal fees, unnecessary disbursements, and financial losses incurred trying to fix the lawyer's mistake.
Lost capital or settlement value: The exact value of what you lost (e.g., an inheritance, a property, a dismissed personal injury claim).
Aggravated/General Damages: In very rare cases, if the lawyer's negligence caused extreme physical/mental distress above and beyond the inherent stress of a lawsuit, the court may award general damages.
3. Immediate Actionable Steps
Mitigate your losses: You must take reasonable steps to limit the damage the lawyer caused.
Contact the Lawyers Indemnity Fund (LIF): All practicing BC lawyers carry insurance. You should ask the lawyer to report their error to the Lawyers Indemnity Fund. LIF will investigate, and if liability is clear, they may attempt to settle the damages.
Strict Limitation Periods: Under the BC Limitation Act, you generally have two years from the date you discovered (or reasonably ought to have discovered) the lawyer’s negligence to file a claim in the Supreme Court of British Columbia.
1. The Core Calculation: "But For" Causation
To claim damages, you must prove on a balance of probabilities that "but for" the lawyer's negligence, you would have achieved a better financial or legal outcome.
If the lawyer lost a lawsuit: You must prove you had a winning case and quantify what you would have been realistically awarded in that lawsuit.
If the lawyer missed a limitation deadline: You calculate the value of the lost claim minus the likelihood that the defendant could have successfully defended it.
If the lawyer made a business/transactional error: Damages are measured objectively as your net financial loss in that specific transaction.
2. Available Heads of DamageIf you prove the lawyer's negligence, you can seek several types of compensation:
Out-of-pocket expenses (Special Damages): Exact reimbursement for wasted legal fees, unnecessary disbursements, and financial losses incurred trying to fix the lawyer's mistake.
Lost capital or settlement value: The exact value of what you lost (e.g., an inheritance, a property, a dismissed personal injury claim).
Aggravated/General Damages: In very rare cases, if the lawyer's negligence caused extreme physical/mental distress above and beyond the inherent stress of a lawsuit, the court may award general damages.
3. Immediate Actionable Steps
Mitigate your losses: You must take reasonable steps to limit the damage the lawyer caused.
Contact the Lawyers Indemnity Fund (LIF): All practicing BC lawyers carry insurance. You should ask the lawyer to report their error to the Lawyers Indemnity Fund. LIF will investigate, and if liability is clear, they may attempt to settle the damages.
Strict Limitation Periods: Under the BC Limitation Act, you generally have two years from the date you discovered (or reasonably ought to have discovered) the lawyer’s negligence to file a claim in the Supreme Court of British Columbia.