Under TILA-RESPA Integrated Disclosure (TRID) rules, if a lender overcharges the borrower by more than the allowable 10% aggregate tolerance on certain closing costs, the lender must refund the excess amount to the borrower within 60 days of loan consummation. The 10% tolerance applies to certain fees like title insurance and government recording fees, ensuring that the lender provides accurate estimates on the Loan Estimate (LE) and does not exceed allowable variances at closing.