Home > Personal > Personal Lending > Mortgage > Mortgage Resources > Glossary > Assumption Fee Assumption Fee November 9, 2021 The fee paid to a lender (usually by the purchaser of real property) resulting from the assumption of an existing mortgage.You Might Also Like: Family MattersPreparing Financially for a Baby Everyday MoneyBudget Friendly Ideas for Thanksgiving Everyday MoneySenior Discounts and Savings Everyday MoneyStarting an Emergency Savings Account Living QuartersQuestions to Ask Your Home Inspector