Multiple car accidents in Ontario can make it difficult to separate new injuries from earlier conditions and to determine which claim bears which loss. The analysis turns on medical records, chronology, causation and applicable deductibles. The legal analysis depends on the circumstances of each incident.
Key takeaways: Build a clear timeline, keep medical records from each incident, identify aggravation versus new injury and review how deductibles may apply.
Why a later accident matters to your claim
In a personal injury lawsuit, the injured person must show that the defendant’s negligence caused their injuries and losses. When there is more than one accident, the question becomes which accident caused which harm, and to what extent.
Defence lawyers routinely ask about prior and subsequent accidents, at examinations for discovery and in medical records. A common defence position is that ongoing symptoms are due to a later event rather than the accident being sued over. Medical evidence, the timing of symptoms and consistent reporting to treating providers all become important.
Pain and suffering damages: threshold and deductible
In Ontario, claims for pain and suffering (general or non-pecuniary damages) arising from motor vehicle accidents are subject to special rules under the Insurance Act:
• a threshold under the Insurance Act and a statutory deductible. For 2026, the non-pecuniary deductible is $47,913.01 unless damages exceed $159,708.71. See Insurance Act s. 267.5(8.3) and FSRA guidance: https://www.fsrao.ca/industry/auto-insurance/regulatory-framework/guidance-auto-insurance/2026-automobile-insurance-indexation-amounts-guidance; and
• a statutory deductible, which is subtracted from awards for pain and suffering below a certain amount.
For 2026, the non-pecuniary deductible is $47,913.01 under O. Reg. 461/96, s. 5.1(1), unless damages exceed the $159,708.71 threshold under Insurance Act, s. 267.5(8.3). See FSRA’s 2026 Indexation Guidance: https://www.fsrao.ca/industry/auto-insurance/regulatory-framework/guidance-auto-insurance/2026-automobile-insurance-indexation-amounts-guidance.
A simple illustration
Using the 2026 figures for illustration only: if a court assessed non-pecuniary damages at $100,000, the $47,913.01 deductible would reduce the award to $52,086.99 because the award is below the $159,708.71 threshold. See FSRA’s 2026 Indexation Guidance: https://www.fsrao.ca/industry/auto-insurance/regulatory-framework/guidance-auto-insurance/2026-automobile-insurance-indexation-amounts-guidance. Actual results depend on the facts and the applicable law.
Two car accidents, two deductibles?
Where a person is injured in two separate motor vehicle accidents, each accident may give rise to its own claim, and each claim may be subject to its own deductible. In practical terms, this can mean that a significant portion of the pain and suffering damages is absorbed by two deductibles rather than one. How the deductible applies in multiple-accident cases can be technical and fact-specific, and should be reviewed by a lawyer.
How insurers share responsibility
When two or more defendants, and their insurers, are involved in separate accidents that contributed to the same injuries, a court may need to apportion damages between them. In practice, insurers sometimes agree among themselves on how to fund a settlement, for example on a 70/30 split, to avoid the expense of litigating causation between them. Any such split depends on the evidence and negotiations in that case.
Pierringer agreements
Sometimes one defendant settles with the plaintiff while the claim continues against the others. A Pierringer agreement is a type of settlement that allows one defendant to leave the lawsuit while the plaintiff pursues the remaining defendants only for their share of responsibility. These agreements must be drafted carefully and disclosed appropriately, and their effect on the remaining claim should be explained to the injured person before signing.
Practical steps if you have been in more than one accident
• Tell your lawyer and your treating providers about every accident, including minor ones and those that are not car accidents.
• Report new or worsened symptoms promptly and accurately, and describe how they relate to each event.
• Keep separate records of treatment, expenses and time off work after each accident where possible.
• Preserve evidence from each accident, including photos, reports and witness information.
• Ask whether accident benefits claims for each accident should be coordinated, since each accident may involve its own benefit claim.
Being open about later accidents is important. Undisclosed accidents that come to light later can damage credibility and the overall value of a claim.
Medical evidence in multiple-accident cases
Because causation is central, medical evidence plays a large role. Treating doctors’ notes made after each accident can show what symptoms existed before and after each event. Expert reports may be needed to explain which injuries were caused or worsened by which accident, and to what degree. Courts can find that a later accident aggravated an existing injury, in which case the second defendant may be responsible only for the additional harm it caused. Where injuries from separate accidents cannot realistically be separated, the court may approach the losses differently. These principles are fact-specific and should be reviewed with the medical evidence.
Accident benefits claims may also be affected. Each motor vehicle accident is generally a separate claim for accident benefits, and the insurers may need to determine which accident is responsible for ongoing treatment and income loss. Keeping clear records helps avoid gaps in benefits while this is resolved.
Conclusion
Multiple car accidents in Ontario require a careful causation and deductible analysis. Contact Booni Law at admin@boonilaw.com or +1 (226) 271-1751 to discuss the records. No outcome is promised.
Frequently Asked Questions
Does a second accident cancel my claim for the first?
Not necessarily. The court will consider what harm each accident caused. A later accident can complicate the claim, but it does not automatically end it.
Is the deductible taken off each car accident claim?
Each motor vehicle accident claim may be subject to its own statutory deductible on pain and suffering damages. How this applies in your case should be confirmed by a lawyer.
What is the deductible for 2026?
For 2026, the non-pecuniary deductible is $47,913.01 unless damages exceed $159,708.71. See FSRA’s 2026 Indexation Guidance: https://www.fsrao.ca/industry/auto-insurance/regulatory-framework/guidance-auto-insurance/2026-automobile-insurance-indexation-amounts-guidance.
What if my second accident was a slip and fall?
The deductible discussed here applies to motor vehicle accident claims. A slip and fall claim follows different rules, but it can still affect causation in the car accident claim.
Questions about a claim involving more than one accident?
If you have been hurt in more than one accident, Booni Law can review how the accidents may interact and explain the issues that may affect your claim. Email Booni Law at admin@boonilaw.com or call +1 (226) 271-1751. Each case is different, and no outcome can be guaranteed.
Disclaimer: This article is provided for general informational purposes only and does not constitute legal advice. Reading this article does not create a solicitor-client relationship between you and Booni Law. The information in this article may not reflect the most current legal developments and should not be relied upon as a substitute for professional legal advice tailored to your specific circumstances. If you require legal advice, please contact Booni Law.
