Recently, I came across a post on LinkedIn from a fellow mediator that got me thinking. It described a situation many of us have seen in personal injury cases: a plaintiff earned $35,000 a year before an accident, hasn’t worked for three years, and has been receiving income replacement benefits. The question posed was deceptively simple — in calculating past income loss, do you deduct 70 percent first and then subtract the benefits received, or subtract the benefits first and then apply the 70 percent?

The post inspired me to write this blog.

On the surface, it looks like a math problem. In reality, it’s a window into one of the most persistent and technical disputes in Ontario motor vehicle accident litigation: how to handle statutory accident benefits (SABs) deductions from tort awards, and how closely those benefits need to “match” the damages awarded in a lawsuit. The Ontario Court of Appeal’s decision in Cadieux v. Cloutier, 2018 ONCA 903^[1] provides the clearest answer yet, and its implications extend far beyond the courtroom — right into the mediation room.

Ontario’s auto compensation scheme has always been a hybrid. On one side, you have no-fault SABs, available to anyone injured in an automobile accident, regardless of who caused it. On the other side, you have the right to sue in tort for damages, subject to statutory deductibles, thresholds, and the common law cap on general damages. The SABs regime divides benefits into three broad categories — income replacement, non-earner and caregiver benefits; health care benefits (medical, rehabilitation, and attendant care); and other pecuniary losses (housekeeping, home maintenance, and visitor’s expenses). Section 267.8 of the Insurance Act is designed to prevent double recovery. SABs received before trial must be deducted from the matching category of tort damages^[2], and benefits received after trial must be assigned to the tort insurer or held in trust^[3].

The real battle has always been about matching. For years, courts often applied what became known as the “apples to apples” approach, drawn from the Bannon v. McNeely^[4] case. Under that method, you could only deduct a benefit if it matched the tort award in both nature and timing — for example, a past attendant care benefit could only be deducted from a past attendant care award. More recent cases began moving toward a “silo” approach, which matches benefits to damages at the broader statutory category level, rather than at a micro, head-to-head level.

The Cadieux case itself arose from a 2006 incident where Chad Cadieux suffered catastrophic injuries after being pushed into the path of a truck. He was incapable of managing his own affairs. His SABs claim against Aviva settled for $900,000 — $300,000 for income replacement, $250,000 for medical and rehabilitation, and $350,000 for attendant care. He also settled his tort claim against the truck driver, Cloutier, for $500,000 in a Pierringer agreement, leaving the other defendant, Saywell, to go to trial.

The jury awarded over $2.3 million, splitting fault equally between Cadieux, Cloutier, and Saywell. The post-trial fight was over how the SABs settlement and earlier benefit payments would reduce Saywell’s share. The trial judge adopted the silo approach, treating the medical, rehab, and attendant care benefits as part of the same health care category and deducting them from the award for an acquired brain injury support worker. He also ruled that Saywell could only deduct his proportionate share of the SABs, corresponding to his share of liability, rather than the entire amount.

The Court of Appeal upheld this approach and used Cadieux to settle the law. It confirmed that section 267.8 requires matching only within the three statutory silos — income loss, health care expenses, and other pecuniary losses — and not the narrower “apples to apples” matching of earlier cases. It held that SABs received before trial for both past and future losses are combined within each silo before deduction, and that payments to third parties on a plaintiff’s behalf still count as benefits “received.” The Court also rejected the idea that a remaining defendant can deduct 100 percent of SABs after other defendants have settled, stressing that deductions must reflect the defendant’s proportionate liability. It further ruled that deductions must be made on a gross basis, not net of the plaintiff’s legal costs in obtaining SABs. And it confirmed that the 2015 change to prejudgment interest rates applies to pre-amendment accidents tried afterward, because the change is procedural.

For mediators, the importance of Cadieux cannot be overstated. It removes a major source of uncertainty in settlement talks. When we know that the silo approach applies, we can have more informed, realistic discussions about what the final numbers will look like. Plaintiffs’ counsel can present their damages claims on a gross basis in each silo, and defence counsel can calculate proportionate deductions with confidence that the law is settled. The decision also means we no longer have to untangle the “apples to apples” knots that used to complicate post-trial adjustments, making the entire process more efficient and predictable.

The debate that started with a seemingly straightforward income loss calculation is really about fairness, efficiency, and clarity in how SABs interact with tort awards. Cadieux gives us a framework that is legally sound, easier to apply, and better suited to achieving just results without unnecessary complexity. In the mediation room, that clarity translates into better deals, fewer surprises, and more settlements that both sides can accept as fair.