The Response of Debtors to Rate Changes

Andreas Fuster, Virginia Gianinazzi, Andreas Hackethal, Philip Schnorpfeil and Michael Weber

No 34752, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: How borrowers respond to future changes in the interest rate on their debt matters for the transmission of monetary policy and for household financial stability. Combining bank data, a letter RCT, and a survey, we study this question in the context of the German mortgage market, where since 2022 borrowers have faced high interest rates when their rate fixation period ends. We find that borrower actions substantially reduce the impact of higher rates on monthly payments. Survey responses corroborate high informedness and a strong propensity to prepare for rate changes. The letter intervention does not affect rate beliefs but increases awareness of available options and refinancing among borrowers close to expiration of their rate fixation.

JEL-codes: E21 E31 E44 E52 G21 G41 G51 (search for similar items in EconPapers)
Date: 2026-01
Note: AP EFG ME
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