UPB

UBP: Unpaid Principal Balance in Commercial Real Estate

UBP: Unpaid Principal Balance in Commercial Real Estate

In commercial real estate finance, unpaid principal balance, or UPB, is the amount of a loan’s principal balance that has not yet been paid back to a lender. To calculate the UPB, a borrower cannot simply subtract their current mortgage payments from the initial loan amount; since they have also been paying interest, they will have to add this into their calculations.