Many homeowners’ policies have a provision that adjusts the amount of coverage each year to reflect the increases in cost of construction.  This will add about 3% to the premium each year.  Your home ages by one year every year.  Many companies have a factor tied to the age of the home which increases the premium slightly.  If the company has paid a claim on the policy there may be an increased based upon an “experience” factor.  Occasionally the fire rating for a certain geographical area will change which also affects the premium.  The company could experience losses in excess to the total premiums in which case they can file an overall rate change with the state insurance commissioner.