Flagstar Mortgage Login, Payment, Customer Service

Updated August 20, 2020 – Below you will find the key information you need as a Flagstar Bank mortgage customer to access your account online, make payments, and reach customer service for further assistance.

Online Account Access

Customer Service – Help & Pay By Phone

  • The Flagstar mortgage customer service phone number for payments and other assistance is 866-837-4539.

Mortgage Payment Address

Flagstar Bank
P.O. Box 660263
Dallas, TX 75266-0263

In Person

If you live in a geographic area where Flagstar has branches, you can pay your mortgage at a local bank location.