Carbon monoxide poisoning settlements commonly range from about $75,000 for short-term exposure to several million dollars for permanent brain injury or wrongful death. CO is odorless and colorless, so claims usually turn on proving a landlord, manufacturer, or contractor failed to maintain equipment or install detectors. The value depends on the severity of hypoxic brain damage, ongoing care needs, and lost income. Multiple parties — property owners, furnace makers, and HVAC servicers — can share liability. Use the calculator below to estimate a starting range based on your losses and the lasting harm.
A carbon monoxide poisoning settlement calculator gives families a grounded estimate of what a CO exposure claim may be worth before they speak to an attorney. Because carbon monoxide is invisible and odorless, these cases hinge on showing that a responsible party — a landlord who ignored a faulty furnace, a manufacturer of a defective heater, or a contractor who botched a vent installation — failed in a duty that allowed the gas to build up. The calculator combines your documented medical and wage losses with a severity multiplier reflecting the seriousness of hypoxic injury, from headaches and nausea to permanent neurological damage or death, then accounts for any shared fault.
The tool applies the standard personal-injury damages formula. It sums your economic losses — emergency care, hyperbaric oxygen treatment, projected long-term neurological care, and lost wages — then estimates non-economic damages by multiplying medical costs by a severity factor that reflects how disabling the hypoxic injury is. It then subtracts any comparative fault.
Settlement ≈ (Medical Bills + Future Care + Lost Wages) + (Medical Bills + Future Care) × Severity Multiplier, then × (1 − Your Fault %)
CO multipliers run high because even "moderate" poisoning can leave delayed neurological effects that surface weeks later. The 0.7–1.4 band around your number reflects how venue, defendant resources, and the strength of medical proof shift real-world outcomes.
CO settlements span a very wide range because the same gas can cause a transient headache or a permanent brain injury. The bands below reflect commonly reported outcomes by severity.
| Severity Tier | Typical Multiplier | Commonly Reported 2026 Range |
|---|---|---|
| Mild (full recovery) | 2.2–2.7x | $40,000 – $120,000 |
| Moderate (temporary cognitive symptoms) | 3.0–3.4x | $120,000 – $350,000 |
| Serious (lasting deficits) | 3.8–4.2x | $350,000 – $1,000,000 |
| Severe (permanent brain injury) | 4.4–4.8x | $1,000,000 – $4,000,000 |
| Catastrophic / wrongful death | 4.8–5.0x | $2,000,000 + |
Wrongful-death CO claims are valued differently, factoring in the deceased's lost lifetime earnings and the survivors' loss of companionship under state wrongful-death statutes.
The central battleground is proving exposure and its neurological consequences, because survivors can look outwardly fine while struggling with memory, mood, and processing problems.
Carbon monoxide claims usually involve a maintenance or design failure that allowed combustion gases to enter living space. Liable parties depend on the source.
Many states and local codes require working CO detectors in dwellings; a violation can establish negligence and is often a pivotal fact in these cases.
Imagine tenants exposed to CO from a cracked furnace heat exchanger their landlord never repaired, leaving one tenant with lasting memory and concentration problems. They enter:
Economic damages = $220,000. Pain and suffering = ($60,000 + $120,000) × 4.0 = $720,000. Gross value = $940,000, and with no comparative fault the net estimate is about $940,000, with a likely range near $658,000 to $1,316,000. Multiple household members could each pursue their own claim.
Because CO injuries can be hard to see, defense strategies focus on doubt.
Objective evidence — blood gas results, fire-department CO readings, code-violation records, and neuropsychological testing — is the strongest answer to these defenses.
Per IRS Publication 4345, compensation for physical injury or physical sickness from CO exposure is generally not taxable, while punitive damages and interest are. Allocations in wrongful-death cases follow specific rules, so professional tax advice is wise.
Severe cases are frequently resolved with a structured settlement that funds decades of neurological care through tax-favored periodic payments. Timelines vary: straightforward exposure with clear negligence can settle in under a year, while disputed brain-injury or wrongful-death cases requiring expert neurology and life-care testimony often take two years or more. Every state imposes a statute of limitations, so families should preserve evidence — the furnace, heater, or detector — and act promptly.
It adds your medical bills, projected long-term care, and lost wages, then estimates pain and suffering by multiplying your medical costs by a severity factor for the neurological harm. It subtracts any fault assigned to you and shows a likely range. It reflects the method attorneys and insurers use but is an estimate, not a formal valuation.
Usually not. Under IRS Publication 4345, money for a physical injury or sickness — including CO-related harm — is generally tax-free. Punitive damages and interest are taxable, and if you deducted related medical costs in a prior year, that portion may be taxed. Confirm the allocation with a tax professional, especially in wrongful-death cases.
It depends on the source. Landlords can be liable for unmaintained furnaces or missing detectors, manufacturers for defective heaters or generators, and HVAC contractors for bad installation or unrepaired equipment. Hotels and employers may also be responsible. More than one party often shares fault, which can increase available insurance.
Objective evidence carries these cases: a carboxyhemoglobin blood test confirming exposure, fire-department CO meter readings, code-violation records, and neuropsychological testing or brain imaging documenting lasting deficits. Many CO survivors appear healthy but have measurable memory, mood, or processing problems that experts can establish.
Often yes. Carbon monoxide typically affects everyone in a dwelling, and each exposed person may have a separate personal-injury claim based on their own injuries. In fatal cases, surviving family members can bring a wrongful-death claim under their state's statute.
Clear-cut exposure with obvious negligence can resolve in under a year. Cases involving permanent brain injury or wrongful death, which need neurology and life-care-planning experts, commonly take two years or longer. Preserving the furnace, heater, or detector early is critical because it is key evidence.