See Principal and Interest.
Principal and Interest Payment; A monthly payment that includes the interest charges for the period plus an amount applied to amortization of the principal balance.
Principle and Interest (same as Capitol and Interest in U.K.). Each loan payment on a fully amortizing loan contains part principle, part interest. As years go on, more of the P & I is for principle according to your mortgage amortization schedule which only shows P & I.
Principal and interest. The term is used to refer to regularly scheduled payments or prepayments on mortgage securities.
Principal and Interest. This refers to the principal and interest portions of the monthly mortgage payment.