Statute of Limitations and the Discovery Rule for Defective Products in New Hampshire

The Strict Deadlines of Product Liability Law

If you are severely injured by a defective medical device, a dangerous toy, or malfunctioning machinery, you cannot wait forever to seek justice. The legal system imposes strict deadlines, known as statutes of limitations, on how long you have to file a lawsuit. In New Hampshire, if you miss this deadline by even one day, the court will almost certainly dismiss your case, leaving you with no way to recover compensation for your medical bills and lost wages. To ensure your rights are protected, you should use our directory to find a skilled local attorney to evaluate your timeline.

The Standard 3-Year Deadline and the Discovery Rule

Under N.H. Rev. Stat. Ann. § 508:4, the standard statute of limitations for personal injury and product liability cases in New Hampshire is exactly three years. Generally, this clock starts ticking on the exact day the injury occurs. For example, if a defective pressure cooker explodes and burns you, you have three years from the date of the explosion to file a lawsuit in a court like the Merrimack County Superior Court, Concord or the Strafford County Superior Court, Dover.

However, some injuries are not immediately obvious. This is where the Discovery Rule comes in. New Hampshire law recognizes that it is unfair to start the clock before you even know you are hurt. Under the Discovery Rule, the three-year timeline does not begin until you discover, or in the exercise of reasonable diligence should have discovered, both your injury and the fact that the defective product was the cause of it.

Deadlines for Toxic Exposure Discovered Years Later

The Discovery Rule is incredibly important in toxic tort and chemical exposure cases. For example, if you were exposed to PFAS (forever chemicals) in your drinking water or asbestos from building materials, you might not develop cancer or respiratory illnesses until decades later. In these situations, your three-year deadline does not start on the day you were exposed to the chemicals. Instead, the clock usually starts on the day you are diagnosed with the illness and a doctor links it to the toxic exposure.

Statute of Repose for Older Machinery

Some states have a 'Statute of Repose', which places an absolute time limit on suing a manufacturer after a product is first sold (for instance, 10 or 12 years), regardless of when the injury happens. New Hampshire previously had a 12-year statute of repose for products, but the Heath v. Sears, Roebuck & Co., 123 N.H. 512 (NH Supreme Court 1983) ruling struck it down as unconstitutional. This means that even if a piece of heavy factory machinery in Manchester is 30 years old, if it causes an injury today due to a design defect, you are not barred from suing simply because the machine is old. You still have three years from the date of your injury to file a claim.

Exceptions for Minors Injured by Toys

When a child is injured by a defective product, such as a choking hazard in a toy or a collapsing crib, the law gives them extra time. Under N.H. Rev. Stat. Ann. § 508:8, the statute of limitations is tolled during minority, but an injured person must bring their personal action within 2 years after reaching the age of majority (18), meaning they have until their 20th birthday to file a lawsuit, regardless of how old they were when the injury actually happened. Parents can, however, file a lawsuit on the child's behalf before they turn 18 to cover immediate medical expenses.

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