Involves monthly payments for property taxes and insurance, besides principal and interest. The tax and insurance payments are put into an impound account. For a residential mortgage this means one-twelfth of the property taxes and property insurance each month. For the borrower, the advantage is the spreading out of these annual expenses into 12 equal payments. For the lender, who normally places these funds into an impound or reserve account, the advantage is the assurance that these expenses will be paid when due.