Last reviewed 10-31-2026Short-Sale.com Editorialglossary
Unpaid Principal Balance (UPB)
Fannie Mae
Updated 10-31-2026
Unpaid Principal Balance (UPB)
The actual balance of the mortgage as of the last paid installment date (also referred to as the "outstanding principal balance").
Fannie Mae Glossary of Terms
Fannie Mae · p. 51
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