Interim tax bills are generated due to an increase in assessment because a new house, garage, addition or any improvement has been added to your property. When purchasing a new home, most times only the land is assessed and during the first year the house is added to the assessment record. Interim bills will have their own pay periods or due dates. (In the future, land and house will be combined and assessed on one bill.) Yes, they are real estate tax bills or property tax bills and can be paid from an escrow account. Please contact or send interim bills to your mortgage company. Mortgage companies do not always understand interim tax bills. You may need to follow up with your mortgage company to see if payment has been issued.