For the Maltese dog breed, 12 to 15 years is the normal range for life expectancy, with 13.5 years old being the average age for a Maltese to live if his or her passing is due to natural causes. This term refers to any fatal illness or bodily malfunction that develops due to the aging process.
While this is the average age, some Maltese dogs live much longer lives. It is not unheard of for a Maltese to reach 15, 16 and even 17 years old. Females tend to live a bit longer than males (1 year longer, on average).
Since the average canine lives approximately 12 years, the Maltese breed tends to live a bit longer than dogs on average.