I examine how geographic variation in mortgage loan prepayment affects fintech lender entry, expansion, and loan pricing in the mortgage market. Fintech lenders have an advantage in recapturing borrowers to whom they have made loans when those borrowers refinance their mortgages. Borrowers from fintech lenders tend to prepay faster than borrowers from other lenders, which is partially caused by characteristics of those borrowers and partially caused by the fintechs finding borrowers who would not otherwise have refinanced and causing them to do so. I identify the borrower characteristics that lead to higher prepayment and those that allow fintech lenders to induce higher prepayment and show that the presence of the latter characteristics lead to fintech lender entry. Finally, I show how fintech lending to this borrower type explains secular trends in prepayment and through this, mortgage pricing.