Interest Calculation Disputes: Complete Guide

Common Interest Calculation Errors

Mortgage interest errors include: ARM index miscalculation (wrong index, wrong margin, wrong adjustment date), per-diem interest computed on wrong balance, default interest rate applied without proper notice or contractual basis, interest on unauthorized fees compounded into balance, and interest calculated during periods when no interest should accrue (e.g., during a forbearance or bankruptcy stay). Interest errors compound over years into massive discrepancies. A QWR demanding full amortization schedule reconciliation is the first step. Interest disputes create genuine issues of material fact defeating summary judgment. Combined with other servicing errors, the cumulative balance error can shift negotiation leverage dramatically. See: Principal Balance Disputes and Servicing Errors Guide.