Gross misconduct is conduct so serious that it fundamentally destroys the employment relationship and justifies summary dismissal (dismissal without notice). Examples typically include: theft, fraud, violence, serious health and safety breaches, gross insubordination, and serious harassment. For gross misconduct, a single act can justify dismissal even for a long-serving employee — but the investigation and hearing must still be carried out fairly.
Legal basis: ERA 1996 s.98(4): dismissal must be within the band of reasonable responses available to a reasonable employer in the circumstances.